01653nas a2200157 4500008004100000022001400041245021800055210006900273260000900342300001400351490000700365520093800372100002901310700003101339856012501370 2017 eng d a1466-803300aSelective synthesis of WO3 and W18O49 nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation0 aSelective synthesis of WO3 and W18O49 nanostructures ligandfree  cAPR  a2096-21050 v193 a

In this study, simple inorganic routes for the synthesis of WO3 and W18O49 nanostructures with variable size and self-assembly are reported. The morphologies and formation of stoichiometric WO3 as well as substoichiometric W18O49 single-crystal phase could be controlled by changing the pH of the reactions medium. This synthesis strategy has the advantages that it is one step, aqueous medium-based, and requires no surfactant or stabilizing agent. Furthermore, it also enables the self-assembly of 1D nanorods of WO3 and W18O49 into hierarchical nanostructures as nanorods bundles, cocoons, urchins, fishbones, etc. This synthesis method may open up a new way to control and tune the stoichiometric and substoichiometric composition of metal oxide nanostructures. Efficient sunlight-driven photocatalytic performance to degrade Rhodamine B (100 mL; 40 mg L-1.) with these tungsten oxide nanostructures was also demonstrated.

1 aShirke, Yogita, Manikrao1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/selective-synthesis-wo3-and-w18o49-nanostructures-ligand-free-ph-dependent-morphology02310nas a2200253 4500008004100000022001400041245013000055210006900185260000900254300001400263490000600277520143200283653001901715653001601734653001601750653002401766653001701790100002901807700001801836700001701854700002501871700003101896856012901927 2019 eng d a2365-654900aSize-controlled cobalt ferrite nanocrystals: magnetically separable reusable nanocatalysts for selective oxidation of styrene0 aSizecontrolled cobalt ferrite nanocrystals magnetically separabl cJUN  a6524-65310 v43 a

Superparamagnetic cobalt ferrite (CFO) nanocrystals (NCs) with sizes similar to 6 nm and similar to 4 nm were synthesized using a facile solvothermal method using fatty acids, lauric acid and stearic acid, as the capping agents. The synthesized nanocrystals were well characterized by XRD, FT-IR, XPS, SEM and TEM. The formation mechanism was explored and it was shown that the fatty acid was actually chemisorbed as a carboxylate onto the surface of CFO NCs. The experimental results specify that the size and size distribution of the CFO NCs were highly dependent on the length of fatty acid hydrophobic chain. Corresponding changes of the magnetic properties were investigated by measuring magnetization as a function of field and temperature, which suggest that the CFO NCs were superparamagnetic in nature. The catalytic properties for the oxidation of styrene in organic medium were examined by using the synthesized CFO NCs with sizes similar to 6 nm and similar to 4 nm. The synthesized CFO NCs, well dispersible in organic media, were demonstrated to be highly catalytically active, reached 100% conversion of styrene in 12 h with similar to 77% and similar to 82% selectivity for styrene oxide respectively. The magnetic CFO nanocatalysts were easily separated and recovered from the reaction medium by an external magnet, and reused for several cycles without losing catalytic selectivity for styrene oxide.

10aCobalt ferrite10aepoxidation10aFatty acids10amagnetic properties10ananocrystals1 aJeyavani, Vijayakrishnan1 aPawar, Sayali1 aDadwal, Arun1 aJoy, Pattayil, Alias1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/size-controlled-cobalt-ferrite-nanocrystals-magnetically-separable-reusable-nanocatalysts01814nas a2200169 4500008004100000022001400041245015400055210006900209260000900278300001600287490000800303520112500311100002701436700003001463700003101493856012001524 2020 eng d a1932-744700aPhase- and morphology-controlled synthesis of tunable plasmonic MoO3-x nanomaterials for ultrasensitive surface-enhanced raman spectroscopy detection0 aPhase and morphologycontrolled synthesis of tunable plasmonic Mo cSEP  a21082-210930 v1243 a

The enhancement of the surface-enhanced Raman scattering (SERS) property of the plasmonic metal oxide semiconductor nanostructures by controlling their phase, shape, size, and oxygen vacancy to detect trace amounts of organics is of significant interest. In this study, a simple surfactant-free hydrothermal strategy was proposed to fabricate crystalline h-MoO3-x and alpha-MoO3-x nanomaterials with tunable plasmonic properties. Herein, the crystal phase, morphology, and oxygen vacancy of MoO3-x nanostructures were precisely controlled under suitable synthetic conditions. The plasmonic properties of the as-synthesized h-MoO3-x and alpha-MoO3-x micro-/nanostructures were controlled by adjusting the residual volume in the autoclaving chamber. In addition, the plasmonic MoO3-x exhibited SERS activity with a detection limit as low as 1.0 x 10(-9) M and the maximum enhancement factor (EF) up to 6.99 x 10(5) for h-MoO3-x, while for alpha-MoO3-x, the detection limit was 1.0 x 10(-7) M with the corresponding EF up to 8.51 x 10(3), comparable with plasmonic noble metal nanomaterials without a ``hot spot''.

1 aPatil, Manoj, Krishnat1 aGaikwad, Supriya, Hanmant1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/phase-and-morphology-controlled-synthesis-tunable-plasmonic-moo3-x-nanomaterials01758nas a2200145 4500008004100000245012900041210006900170260000800239300001800247490000600265520123700271100003001508700003101538856004301569 2021 eng d00a2D MoO2/N-Doped-carbon nanosheets as SERS tweezers: a non-noble metal reusable substrate for selective organic dye detection0 a2D MoO2NDopedcarbon nanosheets as SERS tweezers a nonnoble metal cNOV a11611 - 116240 v43 aThe design and synthesis of a highly sensitive and exceptionally selective surface-enhanced Raman scattering (SERS) substrate with an excellent reusable property are of significant interest because of its vast prospective application in actual and complicated detection environments. Here, a simple synthesis strategy was presented to fabricate crystalline two-dimensional (2D) MoO2/N-doped-carbon nanosheets with the plasmonic property. The morphology, crystal phase, and surface property of MoO2 nanomaterials (NMs) were specifically controlled under suitable reaction conditions. In addition, the plasmonic MoO2/N-doped-carbon NM exhibited a SERS maximum enhancement factor up to 1.38 × 104 with a detection limit as low as 1.0 × 10–6 M. More importantly, the as-synthesized nanocomposite shows high selectivity as a “SERS Tweezer” toward methylene blue (MB) in binary and ternary mixed interfering analyte solutions, preserving detection sensitivity toward MB for three cycles via an “elect-and-eliminate” approach. This strategy will be helpful to design other plasmonic semiconductor NMs for successful tangible applications of selective SERS sensing for trace impurity detections in real and complex environments.1 aGaikwad, Supriya, Hanmant1 aMukherjee, Shatabdi, Porel uhttps://doi.org/10.1021/acsanm.1c0215101186nas a2200157 4500008004100000022001400041245011300055210006900168260000800237300001400245490000600259520059500265100001700860700003100877856012000908 2021 eng d a2050-748800aCsPbBr3/Cs4PbBr6 perovskite@COF nanocomposites for visible-light-driven photocatalytic applications in water0 aCsPbBr3Cs4PbBr6 perovskiteCOF nanocomposites for visiblelightdri cMAR a6819-68260 v93 a

For the first time, we have synthesized all-inorganic CsPbBr3/Cs4PbBr6 perovskite@COF nanocomposites under atmospheric conditions and tuned the crystal structures of the perovskite as well. The nanocomposite is reasonably stable and maintains its crystalline properties even when dipped into water for 60 minutes. The perovskite@COF nanocomposite shows efficient visible-light-driven photocatalytic performance to degrade Methyl orange (10 mL; 20-100 ppm). The rate of photodegradation was about 0.245 min(-1) with high catalytic activity and recyclability for three to six cycles.

1 aKour, Prachi1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/cspbbr3cs4pbbr6-perovskitecof-nanocomposites-visible-light-driven-photocatalytic02140nas a2200313 4500008004100000022001400041245013500055210006900190260000900259300001600268490000700284520108400291653001901375653004001394653002201434653001901456653001601475100001701491700002501508700001401533700001801547700001601565700002001581700003101601700002301632700002301655700002501678856012301703 2021 eng d a1433-785100aOrganic-inorganic perovskitoid with zwitterion cysteamine linker and its crystal-crystal transformation to ruddlesden-popper phase0 aOrganicinorganic perovskitoid with zwitterion cysteamine linker  cAUG  a18750-187600 v603 aWe demonstrate synthesis of a new low-D hybrid perovskitoid (a perovskite-like hybrid halide structure, yellow crystals, P21/n space group) using zwitterion cysteamine (2-aminoethanethiol) linker, and its remarkable molecular diffusion-controlled crystal-to-crystal transformation to Ruddlesden-Popper phase (Red crystals, Pnma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of a unique staggered arrangement of holes in the puckered 2D configuration with a face-sharing connection between the corrugated-1D double chains. The PL intensity for the yellow phase is 5 orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in a self-powered photodetector and for selective detection of Ni2+ via On-Off-On photoluminescence (PL) based on its composite with few-layer black phosphorous.10aCrystal growth10aorganic-inorganic hybrid composites10aperovskite phases10aphotodetectors10azwitterions1 aKour, Prachi1 aReddy, Mallu, Chenna1 aPal, Shiv1 aSidhik, Siraj1 aDas, Tisita1 aPandey, Padmini1 aMukherjee, Shatabdi, Porel1 aChakraborty, Sudip1 aMohite, Aditya, D.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/organic-inorganic-perovskitoid-zwitterion-cysteamine-linker-and-its-crystal-crystal01983nas a2200241 4500008004100000022001400041245012100055210006900176260000900245300000800254490000700262520111400269653001301383653002301396653002801419653003001447653002701477100002901504700002001533700002501553700003101578856013201609 2022 eng d a0250-470700aMgB2/NaNO2-PVA free-standing polymer composite film as a green firework: a step towards environmental sustainability0 aMgB2NaNO2PVA freestanding polymer composite film as a green fire cSEP  a1750 v453 a

We have demonstrated a simple fabrication methodology of free-standing polymer composite film firework that sparkles, provides colour display and moderate sound, yet is less polluting. The polymer composite film fireworks are composed of magnesium boride (MgB2), sodium nitrite (NaNO2) and poly(vinyl alcohol) (PVA). This study also suggested that a flammable, explosive powder composition can be made of two very common inorganic precursors, mainly NaNO2 and MgB2 . This is the first report demonstrating composite film fireworks with new flammable composition using metal boride as a primary precursor, which can also be used in conventional fireworks fabrication, replacing the traditional fuel, mainly gunpowder. The film fireworks were free from charcoal, sulphur, metal powder and paper. Therefore, they substantially lower the odour and COx, NOx, emissions and minimize the substantial trash generated when burned. Most importantly, film firework's minimum ignition temperature and exothermic decomposition temperature are much higher than the ambient temperature; hence are safe to handle.

10aFirework10afree-standing film10amagnesium boride (MgB2)10apoly(vinyl alcohol) (PVA)10asodium nitrite (NaNO2)1 aJeyavani, Vijayakrishnan1 aKumar, Rajendra1 aJoy, Pattayil, Alias1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/mgb2nano2-pva-free-standing-polymer-composite-film-green-firework-step-towards-environmental02351nas a2200229 4500008004100000022001400041245011400055210006900169260000800238490000700246520155000253653001601803653000801819653002001827653002301847100001801870700002701888700003101915700003001946700001901976856012601995 2022 eng d a1861-472800aScalable mechanochemical synthesis of beta-ketoenamine-linked covalent organic frameworks for methane storage0 aScalable mechanochemical synthesis of betaketoenaminelinked cova cDEC0 v173 a

In the current scenario of increased pollution and releasing toxic gases by burning petroleum products, switching to natural gas is more promising for reducing CO2 emissions and air pollutants. Hence, research on Liquefied Natural Gas and Compressed Natural Gas is gaining more value. However, natural gas primarily consists of CH4, which has less energy density than conventional fuels. Interestingly, since the C-H ratio of CH4 gas is 1 : 4, it is easily combustible, gives less carbon footprint, and reduces unburnt hydrocarbon pollution. Hence, research on storing and transporting CH4 has utmost importance, and porous materials are one of the suitable candidates for storing CH4. Herein we report the scalable synthesis of highly porous and crystalline covalent organic frameworks for storing CH4 at room temperature and pressure. Two COFs, namely, Tp-Azo and Tp-Azo-BD(Me)(2), synthesized in 1 kg at similar to 45 g batch scale using a Planetary mixer, displayed a maximum BET surface area of around 3345 m(2)/g, and 2342 m(2)/g and CH4 storage of 174.10 cc/cc and 151 cc/cc, respectively. A comparison of the CH4 sorption of Tp-Azo and Tp-Azo-BD(Me)(2) COFs synthesized in different batches has a variation of only +/- 5 cc/cc and shows the consistency in bulk scale synthesis of COFs. The cyclic equilibrium CH4 adsorption studies showed the COFs are stable with consistent CH4 adsorption and desorption cycles. The present study is a step towards the scalable mechanochemical synthesis of COFs for gas storage applications.

10aCH4 storage10aCOF10aporous material10ascalable synthesis1 aAsokan, Kiran1 aPatil, Manoj, Krishnat1 aMukherjee, Shatabdi, Porel1 aSukumaran, Santhosh, Babu1 aNandakumar, T. uhttps://library.ncl.res.in/content/scalable-mechanochemical-synthesis-beta-ketoenamine-linked-covalent-organic-frameworks02226nas a2200253 4500008004100000245015100041210006900192260000900261300001600270490000600286520128100292653001201573653001801585653002201603653001901625653003601644653002801680100002701708700003001735700002901765700002001794700003101814856012701845 2023 eng d00aLigand-free one-pot synthesis of Ru/W18O49 self-assembled hierarchical coral-like nanostructures for selective conversion of glucose into glycols0 aLigandfree onepot synthesis of RuW18O49 selfassembled hierarchic cDEC  a22635-226420 v63 a

In this study, we report a simple inorganic route for the synthesis of Ru/W18O49 self-assembled coral-like nanostructures, with the following advantages: It is one step and requires no surfactant or stabilizing agent; Ru loading is easily tuned, and the as-synthesized nanomaterials can be used as a catalyst without any further processing. The preliminary investigations of the catalytic performance of these as-synthesized Ru/W18O49 nanomaterials appear quite promising for converting glucose to glycols. The total glycol selectivity of 82.6% with 100% conversion of glucose was obtained over 0.03 wt % Ru loading on tungsten nanostructures, which turns out to be the lowest Ru loading% on support reported to date to achieve the highest total glycol selectivity among the previously reported catalyst based on Ru-nano/composite materials. Additionally, preliminary results show that the concentration of Ru on W18O49 significantly affects the selectivity of the glycol production. Thus, our methodology will open up a wide range of opportunities regarding the choice of metals, stoichiometric/nonstoichiometric WOx (x=1-3) as support, and the viability of further catalytic manipulations. A probable catalytic mechanism for this catalytic process is also proposed.

10aglycols10aNanostructure10aOne-pot synthesis10aruthenium (Ru)10aselective conversion of glucose10atungsten oxide (W18O49)1 aPatil, Manoj, Krishnat1 aGaikwad, Supriya, Hanmant1 aKirali, Arun, Arunima Ba1 aMarimuthu, Banu1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/ligand-free-one-pot-synthesis-ruw18o49-self-assembled-hierarchical-coral-nanostructures03386nas a2200229 4500008004100000245014900041210006900190260000800259300001600267490000600283520252700289653001602816653002102832653001302853653001602866653003002882653003302912100002902945700002802974700003103002856012303033 2024 eng d00aEffect of transition metals (Mn, Co, Ni, and Zn) in size-controlled metal ferrite nanocrystals on the electrocatalytic oxygen evolution reaction0 aEffect of transition metals Mn Co Ni and Zn in sizecontrolled me cJUL a17776-177850 v73 a

Metal ferrite (MFO) M2+Fe2O4 (M2+ = Mn, Co, Ni, and Zn) nanocrystals (NCs) with a controlled size of similar to 4 nm were synthesized using stearic acid as the capping agent via a facile solvothermal method. The as-synthesized MnFe2O4 (MnFO), CoFe2O4 (CoFO), NiFe2O4 (NiFO), and ZnFe2O4 (ZnFO) NCs were characterized by XRD, FT-IR, Raman, XPS, TGA, TEM, and HRTEM analyses. The electrocatalytic oxygen evolution reaction (OER) is significant for future renewable energy to produce pure hydrogen (H-2) fuels through H2O splitting. However, because of the complex proton-coupled multielectron transfer process, it is kinetically quite challenging. Fe-containing transition metal-based electrocatalysts are well studied since it has been observed that Fe has a significant role in enhancing OER activity. It is well-known that the size and shape of the Fe/ferrite-based nanoelectrocatalyst play a vital role in electrocatalysis reactions. However, it is also critical to understand the effect of other earth-abundant and cost-effective transition metal ions (e.g., Mn, Co, Ni, and Zn) combined with Fe/ferrite NC-based OER electrocatalytic reactions while keeping the size of NCs constant and compare their electrocatalytic properties toward the development of advanced nanoelectrocatalysts, which is rarely studied to the best of the authors knowledge. Therefore, herein, the electrocatalytic properties for OER were examined by using the as-synthesized MnFO, CoFO, NiFO, and ZnFO NCs to understand the effect of metal ions (Mn, Co, Ni, and Zn) on the Fe-based nanoelectrocatalysts by keeping the size of the nanoelectrocatalysts constant at similar to 4 nm. Additionally, the influence of different substrates, e.g., carbon paper (CP) and nickel foam (NF), on the electrocatalytic activity of MFO (MnFO, CoFO, NiFO, and ZnFO) NCs was also compared. Interestingly, as an OER nanoelectrocatalyst, the CoFO NCs on the CP substrate show better electrochemical OER activity than other MFO NCs, with a Tafel slope value of 49.4 mV dec(-1), an ECSA of 112 cm(2), and a long-term stability of 24 h, which is comparatively higher than the other as-synthesized MFO NCs. On the other hand, MnFO NCs on the NF substrate show better electrochemical OER activity than the other as-synthesized MFO NCs. Therefore, this work highlights the effect of the substrate and the influence of transition metals, e.g., Mn, Co, Ni, and Zn, on size-controlled Fe-based nanoelectrocatalysts toward developing advanced OER electrocatalysts.

10aCarbonpaper10aelectrocatalysis10aFerrites10aNickel foam10aOxygen Evolution Reaction10aSize-controlled nanocrystals1 aJeyavani, Vijayakrishnan1 aManoj, Shanmugasundaram1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/effect-transition-metals-mn-co-ni-and-zn-size-controlled-metal-ferrite-nanocrystals12840nas a2200181 45000080041000002450159000412100069002002600008002693000016002774900006002935201219600299100001712495700001812512700002312530700002212553700003112575856005212606 2024 eng d00aLead-free low-dimensional tetraalkylammonium manganese- and copper-based hybrid organic–inorganic perovskites for visual fluorometric Pb2+ ion detection0 aLeadfree lowdimensional tetraalkylammonium manganese and copperb cJUL a1533–15450 v23 a

For the first time, we have synthesized lead (Pb)-free manganese (Mn)- and copper (Cu)-based hybrid organic–inorganic perovskite (HOIP) compounds, compound 1, (TEA)2MnBr4, compound 2, (TBA)2MnBr4, compound 3, (TEA)2CuBr4, and compound 4, (TBA)CuBr2 (where TEA is tetraethylammonium and TBA is tetrabutylammonium), under ambient conditions via mechanochemical synthesis methodology using a Kakuhunter-made planetary mixer. The compounds are characterized as 2D except for (TBA)CuBr2, which has crystallized in the 0D lattice. The synthesized compounds are phase pure and show a stable solid-state emission at room temperature. The Mn-based perovskite compound 1 showed excellent environmental photostability for over a month and reasonable stability under a relative humidity of 70–80%. The nanoparticle (NP) dispersions of compounds 1 and 2 were used further for fluorescence titration studies using various heavy metal cations, including transition metals and lanthanides (e.g., Y3+, Nb3+, Co2+, Ni2+, Ag+, Zn2+, Cd2+, Pb2+, Gd3+, and Dy3+), where they showed good fluorescence switching by the Pb2+ ion. Compound 1 demonstrated excellent fluorescence switching performance with Pb2+ titration with a Pb2+ detection limit of 2.43 × 10–8 M and hence can be used to fabricate a Pb2+ calorimetric sensor. A preliminary visual thin film-based sensor using NPs of compound 1 was fabricated to test the change in emission from blue to green in correlation with the results obtained in the NP solution during Pb2+ ion sensing. A fascinating in situ ion-exchange-based mechanism for the sensitivity of NPs of compound 1 is confirmed. This study reveals the ability of Pb-free Mn-based HOIPs to detect an oxidizing metal cation, Pb2+, efficiently and quantitatively.

1 aKour, Prachi1 aSahu, Pragati1 aDambhare, Neha, V.1 aRath, Arup, Kumar1 aMukherjee, Shatabdi, Porel uhttps://pubs.acs.org/doi/10.1021/acsaom.4c0018203026nas a2200301 4500008004100000022001400041245017000055210006900225260000900294300001400303490000600317520195900323653001702282653002002299653001702319653001902336653003502355653003602390653002402426100002902450700002302479700001702502700001502519700001802534700001802552700003102570856012302601 2024 eng d a2574-096200aRemarkable SO2 and H2S resistant ability on CO oxidation by unique Pd/WO3 3D hollow sphere nanocatalyst: correlating structure-activity relationships on SO2 exposure0 aRemarkable SO2 and H2S resistant ability on CO oxidation by uniq cJAN  a1476-14870 v73 a

We report a simple inorganic route for synthesizing a Pd/WO3 3D hollow sphere nanocatalyst, where Pd nanoparticles are encapsulated and well distributed on porous tungsten oxide nanospheres. The synthesis protocol has advantages, as it requires no surfactant or stabilizing agent, Pd loading is easily tuned, and the as-synthesized nanomaterials can be directly used as catalysts for the CO oxidation reaction. The synthesized nanocatalyst exhibited 100% CO to CO2 conversion efficiency at 260 degrees C. In addition, the nanocatalyst demonstrated remarkable SO2 (3 ppm) tolerance during the CO oxidation reaction for prolonged SO2 sulfation of 1-21 h at 260-400 degrees C. This represents the longest SO2 exposure time reported to date based on a single metal Pd/support-based nanocatalyst. No decrement in CO conversion efficiency was observed even after SO2 (3 ppm) treatment for 21 h for the first time based on a single metal Pd-based nanocatalyst. Moreover, the synthesized nanocatalyst shows H2S (4 ppm), even in situ H2S tolerance during the CO oxidation reaction at 260 degrees C for 1-3 h and exhibited less sensitivity to prolonged and stringent sulfur exposure, with the highest H2S concentration and maximum 100% CO to CO2 conversion efficiency obtained after H2S treatment for the first time based on a Pd-based nanocatalyst to the best of our knowledge. The composition and structure of the R-Pd/WO3 nanocatalyst were not much influenced, even after the prolonged SO2 and H2S exposure during the CO oxidation reaction, as verified from spent catalyst analysis. Finally, our DFT-based model provides insights into understanding the observed sulfur resistance on Pd/WO3 by analyzing the underlying electronic structure. Therefore, our strategic synthesis methodology will open up many opportunities to select Pd/metal oxide-based nanomaterials for designing highly efficient, stable, and SO2/H2S-resistant nanocomposite catalyst.

10aCO oxidation10aDFT calculation10ananocatalyst10apalladium (Pd)10aSO2 andH(2)S resistant ability10astructure-activityrelationships10atungstenoxide (WO3)1 aJeyavani, Vijayakrishnan1 aKondhekar, Deepali1 aBhati, Meema1 aDev, Sahil1 aJoshi, Kavita1 aDevi, Nandini1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/remarkable-so2-and-h2s-resistant-ability-co-oxidation-unique-pdwo3-3d-hollow-sphere02213nas a2200265 4500008004100000022001400041245014100055210006900196260000800265300001600273490000700289520133700296653001401633653001001647653002001657653000801677653001801685653000801703653002001711100001501731700002601746700001901772700003101791856012501822 2025 eng d a1944-824400aBifunctional nanoelectrocatalyst: semi-amorphous cobalt tungstate-based nanocomposites surpassing amorphous and crystalline counterparts0 aBifunctional nanoelectrocatalyst semiamorphous cobalt tungstateb cFEB a15319-153320 v173 a

Electrocatalytic water splitting to hydrogen and oxygen is considered to be one of the significant routes for future renewable energy conversion. Therefore, the development of unique, efficient, and cost-effective bifunctional electrocatalysts, which can perform both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is critical for the accessible utilization of renewable energy. The increasing overall efficiency of the water-splitting reaction is pivotal for sustainable energy conversion and hydrogen production. Herein, we present a facile solution-based synthesis route to control the crystallinity of the cobalt tungstate (CoWO4) nanomaterials to amorphous, semiamorphous, and crystalline phases and further exploit these nanomaterials as bifunctional electrocatalysts for the HER, OER, and overall electrochemical water splitting reaction. Notably, the semiamorphous cobalt tungstate nanomaterials show a remarkable surface area of approximately 150 m(2)/g, the highest reported for CoWO4-based materials, and demonstrated superior activity for both the OER and HER and outstanding stability over the amorphous and crystalline counterparts. Notably, the SemiAmp||SemiAmp electrolyzer demonstrated a better performance for overall water splitting than the commercial RuO2||Pt/C electrolyzer.

10aamorphous10aCoWO410aelectrocatalyst10aHER10aNanocomposite10aOER10awater splitting1 aDev, Sahil1 aNagappan, Sreenivasan1 aKundu, Subrata1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/bifunctional-nanoelectrocatalyst-semi-amorphous-cobalt-tungstate-based-nanocomposites02532nas a2200157 4500008004100000022001400041245017000055210006900225260000800294300001400302490000700316520187300323100001802196700003102214856012902245 2025 eng d a2050-752600aRapid and efficient microwave-assisted synthesis of Mn-doped cesium bromide to phase engineered cesium manganese bromide nanocrystals with color-tunable RGB emission0 aRapid and efficient microwaveassisted synthesis of Mndoped cesiu cMAY a9465-94730 v133 a

Lead-free perovskite nanocrystals (NCs) have attracted considerable attention due to their excellent optoelectronic properties. However, they generally exhibit broadband emission with poor color purity. Similarly, obtaining tunable red/green/blue (RGB) emissions from lead-free perovskite NCs is highly desirable for several display applications. However, directly synthesizing lead-free perovskite NCs with tunable RGB emission and high color purity remains challenging. Herein, we have developed a simple and rapid microwave-assisted (MW-AT) synthesis strategy for synthesizing Mn-doped CsBr [Mn2+:CsBr] to phase engineering of non-toxic and stable all-inorganic cesium manganese bromide perovskite NCs in a nonpolar solvent with tunable blue-green-red emission color with high color purity. The phase transition was triggered by changing the MnBr2 concentration during the microwave synthesis: from Mn2+:CsBr (blue emission) to zero dimensional (0D) Cs3MnBr5 NCs (green emission) to one dimensional (1D) CsMnBr3 NCs (red emission). In addition, in a controlled moisture environment, both the 0D Cs3MnBr5 and 1D CsMnBr3 NCs were transformed into 0D Cs2MnBr42H2O NCs (blue emission), which could be inversely transformed back to their respective original phase via thermal annealing. Thus, our work highlights for the first time a rapid and efficient MW-AT synthesis strategy to obtain phase-pure tunable optical properties with high color purity from Mn-doped CsBr to cesium manganese bromide perovskite NCs via phase engineering, which can be further utilized in designing anti-counterfeiting and encryption materials for coding with high security and information concealment. Our work also provides a new avenue for exploring efficient MW-AT synthesis of other earth-abundant eco-friendly highly luminescent Pb-free perovskite NCs for future endeavors.

1 aSahu, Pragati1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/rapid-and-efficient-microwave-assisted-synthesis-mn-doped-cesium-bromide-phase-engineered02380nas a2200157 4500008004100000022001400041245018700055210006900242260000900311490000700320520168600327100002702013700003002040700003102070856012102101 2026 eng d a2040-336400aOne-step microwave-assisted synthesis of a MoO3-x-covalent organic framework (COF)-based nanocomposite for amplified surface-enhanced Raman spectroscopy in environmental applications0 aOnestep microwaveassisted synthesis of a MoO3xcovalent organic f cJAN 0 v183 a

This study introduces a novel one-step microwave-assisted (MW-AT) synthesis strategy for a TpTTA COF and demonstrates the fabrication of a MoO3-x-TpTTA COF-based nanocomposite (NC) for the first time. This method significantly reduces synthesis time (similar to 1 h) while achieving a high yield at a moderate temperature (120 degrees C). In contrast, traditional solution-based COF synthesis methods may take several days with continuous heating at higher temperatures (<= 200 degrees C). The as-synthesized MoO3-x-COF-based NC was shown to serve as an affordable and straightforward substrate for surface-enhanced Raman scattering (SERS) detection of an organic dye, such as methylene blue (MB), achieving a maximum enhancement factor (EF) of 7.76 x 104. The incorporation of MoO3-x into the COF provides several advantages, including plasmonic enhancement by nonstoichiometric transition metal oxide (TMO) without requiring the addition of noble nanocrystals (e.g., Ag, Au, etc.), improved stability of the SERS substrate, comparable SERS sensitivity, and reduced costs. Furthermore, the as-synthesized MoO3-x-TpTTA COF-based SERS substrate demonstrated exceptional detection capabilities with high reproducibility, achieving a limit of detection (LOD) as low as 12.5 ppm for Mancozeb (Mz), a common commercially used dithiocarbamate insecticide used on various vegetables, fruits, nuts, and field crops. Notably, Mz is classified as a category III carcinogen by the International Agency for Research on Cancer. This highlights the potential for developing TMO-COF-based NCs for next-generation SERS-based applications in environmental and food safety monitoring.

1 aPatil, Manoj, Krishnat1 aWagh, Premjeet, Gangadhar1 aMukherjee, Shatabdi, Porel uhttps://library.ncl.res.in/content/one-step-microwave-assisted-synthesis-moo3-x-covalent-organic-framework-cof-based