01940nas a2200229 4500008004100000022001400041245009200055210006900147260007700216300001400293520110000307653002401407653001901431653002001450653001301470653001401483100002301497700001901520700002401539700002401563856012301587 2015 eng d a1434-194800aMicrowave-assisted synthesis of few-layered TaTe2 and its application as supercapacitor0 aMicrowaveassisted synthesis of fewlayered TaTe2 and its applicat aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcMAR a1598-16033 a

We report a simple and rapid microwave-assisted synthesis of tantalum telluride (TaTe2) nanosheets. The ratio of tantalum pentachloride (TaCl5) and elemental tellurium (Te) powder were adjusted in the presence of NaBH4 in such a way as to obtain the TaTe2 nanosheet. The samples were characterized by various techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), UV/Vis spectroscopy, photoluminescence (PL) spectroscopy, and XRD. Our SEM, TEM, and AFM results show the formation of sheet-like morphology, while the XRD data confirms the high crystalline quality and stable phase of the TaTe2 formed. The supercapacitor cells were fabricated by using TaTe2 nanosheets as anode material, platinum metal wire as a counterelectrode, and Ag/AgCl as reference electrode. The calculated coulombic efficiency is more than 95%, while the cycle-to-cycle decrease in capacity is less than 5%. The maximum discharge or charging capacity is below 2.4 Wh/kg, which is an ideal characteristic for achieving supercapacitor behavior.

10aMicrowave chemistry10aNanostructures10aSupercapacitors10aTantalum10aTellurium1 aChakravarty, Disha1 aKumar, Praveen1 aUgale, Vaishali, S.1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/microwave-assisted-synthesis-few-layered-tate2-and-its-application-supercapacitor-001530nas a2200157 4500008004100000022001400041245006400055210006300119260000800182300002400190490000600214520101300220100001901233700002701252856009301279 2019 eng d a2045-232200aSynthesis of nanogate structure in GO-ZnS sandwich material0 aSynthesis of nanogate structure in GOZnS sandwich material cJAN aArticle Number: 9370 v93 a

Graphite Oxide (multi-layer) composite with other materials has a huge application in various field of science, due to its excellent and unique properties. Even though from past decade, immense research has been done by materials scientists in this field, but the chemistry is still not yet satisfactory. Here, in this work, through the discovery of Nanogate structure, we have reported for the first time the experimental results that enlightened the clear chemistry between the GO and ZnS which is further supported by the DFT calculations. This novel synthesis method led to the discovery of nanogate structure sandwiched between the GO layers. The nanogate formation also shows enhanced properties for various applications like photocatalytic activities, etc. Due to the nanogate formation, there might be a possibility of enormous generation of electrons on excitation of the composite materials, which can be a boom for various applications like photocatalysis, water splitting, solar cell, etc.

1 aKumar, Praveen1 aLuwang, Meitram, Niraj uhttps://library.ncl.res.in/content/synthesis-nanogate-structure-go-zns-sandwich-material02426nas a2200253 4500008004100000022001400041245014100055210006900196260000800265300001100273490000800284520152300292653003601815653002301851653001701874653002001891653003201911653000901943100001901952700001501971700003101986700002702017856012802044 2022 eng d a0921-510700aCdS cubane type clusters encapsulated by rolling of single layer reduced graphene oxide sheets for enhanced mechanical energy harvesting0 aCdS cubane type clusters encapsulated by rolling of single layer cFEB a1155280 v2763 aComposites with Single Layer Graphene Oxide (SLGO) sheets are extremely difficult to achieve, irrespective of the current advancements in graphene composites research. The difficulties in exfoliating the graphite oxide (GO) was associated with a strong interaction among the edge sides of the adjacent layers. This in-turn barricades the foreign intruders to interact with the basal plane, thereby restraining one to form composites with SLGO sheets. In this work, we had successfully exfoliated GO through a spacer [Cd(OAc)(2) + polyethylene glycol (PEG)] to result in nano-engineered CdS cubane-type clusters in rolled up SLGO to form graphene oxide complex compound (GOCC), resembling carbon nanotubes (CNTs). The CdS cubane-type clusters were found to interacting with the carbon skeleton of rolled reduced SLGO sheet through a Manogate' structures, which was supported by density functional theory (DFT) calculations. Our theoretical study reveals that the obtained complex compound (GOCC) is thermodynamically more favourable than its ancestor materials (CdS cubane and empty CNT). Flexible piezoelectric nanogenerators (PENGs) fabricated from GOCC and thermoplastic polyurethane (TPU) resulted in output voltage (V-oc) of 4.5 V and output current of 0.4 mu A at applied force of 13 N. The nanoengineering helps to achieve superior mechanical energy harvesting performance for GOCC compared to pristine CdS, which demonstrate the potential of nanogate structures to enhance the intrinsic properties of materials.10aGraphene oxide complex compound10aNanogate structure10aNew material10aNovel procedure10aPiezoelectric nanogenerator10aSLGO1 aKumar, Praveen1 aRam, Farsa1 aShanmuganathan, Kadhiravan1 aLuwang, Meitram, Niraj uhttps://library.ncl.res.in/content/cds-cubane-type-clusters-encapsulated-rolling-single-layer-reduced-graphene-oxide-sheets01610nas a2200181 4500008004100000022001400041245013500055210006900190260000800259300001200267490000700279520091500286100001901201700002101220700003001241700002701271856013001298 2022 eng d a0020-166900aSulfur functionalization via epoxide ring opening on a reduced graphene oxide surface to form metal (II) Organo-bis-[1,2]-oxathiin0 aSulfur functionalization via epoxide ring opening on a reduced g cJAN a279-2860 v613 a

The epoxide ring-opening reaction in graphene oxide (GO) by nucleophiles is a very fascinating and advanced methodology to develop novel functional material. Herewith, we report an advanced strategy for opening the epoxide ring on the rGO surface via easily an available nucleophile (Na2S), which is further functionalized with O atom to obtain four-membered rings (FMRs). The Cd coordination with the S atom puts extra stress on the FMR leading to the C-C bond cleavage of the four-membered heteroatomic rings on the rGO surface. This strategic approach leads to the fabrication of an innovative metal organo-bis-[1,2]-oxathiin (MOBOT) chemical moiety (M = Cd, Zn). The MOBOT compound further shows enhanced H-2 generation activity and hence is promising as a potential photocatalyst for solar hydrogen generation. This compound might also be a potential candidate for optoelectronic applications.

1 aKumar, Praveen1 aBajpai, Himanshu1 aGopinath, Chinnakonda, S.1 aLuwang, Meitram, Niraj uhttps://library.ncl.res.in/content/sulfur-functionalization-epoxide-ring-opening-reduced-graphene-oxide-surface-form-metal-ii02503nas a2200241 4500008004100000022001400041245012000055210006900175260000800244300001200252490000800264520164500272653000701917653002901924653003001953653003601983653002402019653002202043100001902065700002102084700002702105856012902132 2023 eng d a0021-951700aCadmium (II) Organo Tetrakis-[1,2]-Oxathiin (CdOTOT): a 3D sandwiched frameworks with efficient hydrogen production0 aCadmium II Organo Tetrakis12Oxathiin CdOTOT a 3D sandwiched fram cJAN a341-3500 v4173 a

For over a decade, the structure, reactivity, and mechanism of graphene based photocatalysts have been of great interest for hydrogen (H2) generation. Several studies have been done on the edge side groups (ESGs) of graphene oxide (GO), but the basal plane groups (BPGs)-epoxide and hydroxide have acquired far less attention. This is because the GO layers are strongly held with van der waals forces as well as H-bonding which prevents the foreign body from entering inside the layers. To overcome these problems, this study presents the successful synthesis and application of four coordinated sandwiched (FCS) Cadmium (II) Organo Tetrakis-[1,2]-Oxathiin (CdOTOT) in rGO-CdS composite (A 3D sandwiched frame-work). Additionally, experimental outcomes have been further supported using density functional theory (DFT), which suggest that CdOTOT is more stable than its precursors as well as thermodynamically favourable. The CdOTOT shows high H2 production activity -67.5 mmol/g or 13.5 mmol/g/h in presence of 1 % Pt cocatalyst and sacrificial reagents (Na2S/Na2SO3). It is around 33 times higher than pristine CdS, and stable up to around 15 hrs without adding any cocatalyst. This mesmerising outcome is over with reported various CdS-rGO based photocatalysts. The higher activity was further explained through the proposed mechanism and observed low electronic work function of CdOTOT. This innovative and extend-able (with other metals) approach provides a revolutionary impact on numerous cutting-edge research applications like photocatalysis, water splitting, solar cell, etc.(c) 2022 Elsevier Inc. All rights reserved.

10a2]10a3D sandwiched frameworks10aBasal Plane Groups (BPGs)10aCadmium (II) Organo Tetrakis-[110ahydrogen production10aOxathiin (CdOTOT)1 aKumar, Praveen1 aBajpai, Himanshu1 aLuwang, Meitram, Niraj uhttps://library.ncl.res.in/content/cadmium-ii-organo-tetrakis-12-oxathiin-cdotot-3d-sandwiched-frameworks-efficient-hydrogen02615nas a2200205 4500008004100000022001400041245010300055210006900158260000900227300001400236490000700250520187800257100002202135700001902157700002402176700002602200700002702226700002802253856012802281 2026 eng d a2040-336400aLiquid crystalline nanoconfined growth of PANI on rGO for enhanced electrochemical glucose sensing0 aLiquid crystalline nanoconfined growth of PANI on rGO for enhanc cMAR  a5531-55430 v183 a

We report here a new strategy for the successful synthesis of a hybrid 2D nanocomposite via the in situ functionalization of graphene oxide (GO) with aniline monomers in a bi-solvent swollen liquid crystalline lamellar mesophase (SLCLM) nanoreactor. The synthesized nanocomposite product revealed possible simultaneous reactions at the edge and basal plane of GO. A mechanism for the transformation via simultaneous nucleophilic attack and spontaneous polymerization, forming a reduced graphene oxide-polyaniline (rGO-PANI) nanocomposite, is proposed. The multistep plausible reaction mechanism for the functionalization of the GO edge -COOH group is achieved by successful synthesis, followed by isolation and characterization of the N-phenyl anthranilic acid derivative as an intermediate product. Furthermore, the detection of CO2 evolution as a by-product during the reaction complements the plausible mechanism for the incorporation of (-C Xi C-) graphyne-type edges and formation of new -C-N- and O-H bonds in the rGO-PANI nanocomposite. These results are supported by FT-IR, Raman, XPS, SAXS, and C-13 NMR spectroscopy analyses. A reduced graphene oxide-polyaniline (rGO-PANI) modified glassy carbon electrode was developed for glucose sensing, exhibiting a wide linear range (0.554-10 & micro;M), low detection limit (50 pM), and high sensitivity (372 660 & micro;A mM(-1) cm(-2)). The sensor demonstrated excellent selectivity against common interferents (ascorbic acid, uric acid, and dopamine), reproducibility (RSD < 5%), and stability over 10 000 s with minimal signal loss. The detection of glucose from human metabolites, such as urine and sweat, achieved 98-100% recoveries for spiked glucose, confirming its practical applicability. These results establish rGO-PANI as a robust platform for sensitive and selective glucose detection.

1 aTawade, Anita, K.1 aKumar, Praveen1 aTayade, Shivaji, N.1 aSharma, Geetarani, K.1 aLuwang, Meitram, Niraj1 aSharma, Kiran, Kumar K. uhttps://library.ncl.res.in/content/liquid-crystalline-nanoconfined-growth-pani-rgo-enhanced-electrochemical-glucose-sensing