01969nas a2200229 4500008004100000022001400041245013600055210006900191260010500260300001400365490000700379520107300386653001601459653000901475653002001484653002201504653000801526100002801534700002101562700002701583856012901610 2015 eng d a0256-111500aEfficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach0 aEfficient sorption and photocatalytic degradation of malachite g aF.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREAbKOREAN INSTITUTE CHEMICAL ENGINEERScOCT a1986-19920 v323 a

The extract of the Asparagus racemosus leaf tissue works as a stabilizing and capping agent and assists the formation of stable colloidal nanoparticles. Nanoparticles were characterized using UV-vis spectrophotometer, photoluminescence, TEM, EDAX and XRD, respectively. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of near spherical, polydispersed, crystalline NiS of diameter ranging from 4-27 nm. X-ray diffraction studies showed the formation of 110, 101, 300, 021, 220, 221, 131, 410, 401, 321, 330 and 021 planes of hexagonal NiS. EDAX analysis confirmed the presence of Ni and S in nanosphere. The maximum sorption capacity (q (m) ) of NiS nanoparticles for MG dye was found to be 64.85 mg/g. Decolorization as well as disintegration of malachite green under white light illumination was confirmed by LC-MS studies. Results of the present study suggest that nanosized NiS can play an instrumental role in photocatalytic degradation of malachite green dye present in water bodies.

10aDegradation10aFTIR10aMalachite Green10aNiS Nanoparticles10aTEM1 aPrasad, Kumar, Suranjit1 aPrajapati, Sheel1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/efficient-sorption-and-photocatalytic-degradation-malachite-green-dye-nis-nanoparticles-002435nas a2200205 4500008004100000022001400041245014900055210006900204260000800273520162400281653002701905653002301932653002001955653002101975653002301996100002902019700002202048700002702070856013202097 2019 eng d a2196-021600aExploring battery-type ZnO/ZnFe2O4 spheres-3D graphene electrodes for supercapacitor applications: advantage of yolk-shell over solid structures0 aExploring batterytype ZnOZnFe2O4 spheres3D graphene electrodes f cOCT3 a

Recently, a ZnO/ZnFe2O4 composite has been reported to be a promising material for energy storage, owing to its large specific capacity and good redox activity. However, due to the inability to accommodate its strong volumetric variations during operation, it fails to retain its capacitance, which remains as a significant hitch. Herein, we present our attempt towards solving this through a binder-free electrode design comprising a porous yolk-shell ZnO/ZnFe2O4 composite matrixed inside a 3D network of graphene, which, in turn, is grown on Ni foam. The design exhibits a four-fold increase in its specific capacitance, yielding 1334 F g(-1) (specific capacity of 370.5 mAh g(-1)) at a current density of 0.5 A g(-1) in comparison to that of the ZnO/ZnFe2O4 electrodes (309 F g(-1) (85.8 mAh g(-1)) at 0.5 A g(-1)) comprising solid metal oxide spheres. The major advantage of the design is the well-defined yolk-shell architecture that provides free space for volume expansion during long cycling processes and channels for ionic transportation; whereas, the conductive 3D graphene network and porous Ni foam facilitate electronic conduction. The availability of free space in yolk-shell sphere electrodes facilitates the capacitance retention of up to 80 % beyond 5000 cycles at a current density of 1 A g(-1), which is in contrast to the capacitance retained by the solid spheres of only approximately 60 %. These results directly demonstrate the significant consequence of the yolk-shell architecture-based binder-free design and its promising potential in high-performing supercapacitors and batteries.

10abinder-free electrodes10agraphene hydrogels10aSupercapacitors10avolume expansion10ayolk-shell spheres1 aJhajharia, Suman, Kumari1 aManappadan, Zinoy1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/exploring-battery-type-znoznfe2o4-spheres-3d-graphene-electrodes-supercapacitor-applications02036nas a2200229 4500008004100000022001400041245016600055210006900221260000800290300001500298490000600313520119300319653002201512653001901534653002201553653000901575653002301584653002001607100002201627700002701649856013001676 2022 eng d a2365-654900aElectrochemically tuned synergistic nano-interface of a tertiary Ni(OH)(2)-NiO(OH)/NixP heterojunction material for enhanced and durable alkaline water splitting0 aElectrochemically tuned synergistic nanointerface of a tertiary  cAUG ae2022011710 v73 a

Making water splitting cheaper is the need of the hour.The present work reports a nickel-based, non-precious catalytic system, synthesized by a two-step electrodeposition (ED) process followed by a short-term heat treatment. The Ni(OH)(2)-NiO(OH)/NixP heterojunction has been synthesized and optimized through an unprecedented, energy-conserving method to achieve its best OER performance. Further, it has been carefully tuned for the first time by thoroughly optimizing the ED parameters to exhibit Hydrogen Evolution Reaction (HER). At high current regimes, the performance surpassed that of the Ru/C and Pt/C (>= 500 mA and >= 600 mA) respectively. The full cell electrolyzer configuring NOPO||NOPH further establishes the supremacy of the present electrocatalysts over the benchmark Ru/C||Pt/C. Moreover, the present electrocatalyst displayed 60 and 70 hours of HER and OER performances at -100 mA and 100 mA currents respectively. In short, this work is an example that illustrates how a single chemical system gets to exhibit two complementary catalytic behaviors that is, water oxidation and reduction when certain synthetic parameters are meticulously optimized.

10aElectrodeposition10aheterojunction10aNi(OH)(2)-NiO(OH)10aNixP10anon-precious metal10awater splitting1 aManappadan, Zinoy1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/electrochemically-tuned-synergistic-nano-interface-tertiary-nioh2-nioohnixp-heterojunction03141nas a2200253 4500008004100000022001400041245011700055210006900172260000900241300001600250490000700266520227500273653002302548653001902571653002402590653001702614653001202631653002202643653001802665653002902683100002102712700002702733856012702760 2023 eng d a1944-824400aEffective distribution of gold nanorods in ordered thick mesoporous silica: a choice of noninvasive theranostics0 aEffective distribution of gold nanorods in ordered thick mesopor cOCT  a47615-476270 v153 a

Porous silica coated gold nanorod core-shell structures demonstrate a multifunctional role in bioimaging, drug delivery, and cancer therapeutics applications. Here, we address a new approach for effective distribution of gold nanorods (GNRs) in a mesoporous silica (MS) shell, viz., one nanorod in one silica particle (GMS). We have studied that silica coating presents major advantages for the better biocompatibility and stability of GNRs. In this study, two different thicknesses of silica shell over GNRs have been discussed as per the application's need; GNRs in thin silica (11 nm) are fit for phototherapy and bioimaging, whereas thick and porous silica (51 nm) coated gold nanorods are suitable for triggered drug delivery and theranostics. However, effective distribution of GNRs in ordered architecture of thick mesoporous silica (MS, more than 50 nm thickness) with high surface area (more than 1000 m(2)/g) is not well understood so far. Here, we present methodical investigations for uniform and highly ordered mesoporous silica coating over GNRs with tunable thickness (6 to 51 nm). Judicious identification and optimization of different reaction parameters like concentrations of silica precursor (TEOS, 1.85-43.9 mM), template (CTAB, 0.9-5.7 mM), effect of temperature, pH (8.6-10.8), stirring speed (100-400 rpm), and, most importantly, the mode of addition of TEOS with GNRs have been discussed. Studies with thick, porous silica coated GNRs simplify the highest ever reported surface area (1100 m(2)/g) and cargo capacity (57%) with better product yield (g/batch). First and foremost, we report a highly scalable (more than 500 mL) and rapid direct deposition of an ordered MS shell around GNRs. These engineered core-shell nanoparticles demonstrate X-ray contrast property, synergistic photothermal-chemotherapeutics, and imaging of tumor cell (96% cell death) due to released fluorescent anticancer drug molecules and photothermal effect (52 degree celsius) of embedded GNRs. A deeper insight into their influence on the architectural features and superior theranostics performances has been illustrated in detail. Hence, these findings indicate the potential impact of individual GMS for image guided combination therapeutics of cancer.

10aCombinationTherapy10aContrast Agent10aCore-ShellStructure10aGoldNanorods10aImaging10aMesoporous silica10aNanoparticles10aTheranosticsIntervention1 aPrasad, Rajendra1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/effective-distribution-gold-nanorods-ordered-thick-mesoporous-silica-choice-noninvasive02126nas a2200169 4500008004100000022001400041245011900055210006900174260000800243300001400251490000800265520147900273100002501752700002701777700002601804856012601830 2025 eng d a1932-744700aEffect of doping on electrocatalytic dehydrogenation and hydrogenation of methyl decalin-methyl naphthalene system0 aEffect of doping on electrocatalytic dehydrogenation and hydroge cJAN a2367-23800 v1293 a

The hydrogen economy can benefit from the use of liquid organic hydrogen carriers (LOHCs) for cross-continent hydrogen transportation in the future. However, dehydrogenation and hydrogenation of hydrogen require catalytic systems. Current research emphasizes selective Pt/Rh doping of Fe, Co, and Ni surfaces as catalysts for the dehydrogenation and hydrogenation of the methyl naphthalene-methyl decalin LOHC system, which has more than 7% hydrogen weight capacity and meets the practical requirements established by the European Union and the United States Department of Energy. Density functional theory-based computational techniques demonstrate how the chemical modification of these surfaces with a Pt and Rh single-atom catalyst (SAC) can improve the efficiency of dehydrogenation and hydrogenation. With a sustainable method, electrochemical dehydrogenation and hydrogenation on these robust surfaces produce effective hydrogen storage for extended periods without losing hydrogen. Furthermore, optimal results for the hydrogenation of 2-methyl naphthalene on Fe-Rh SAC with path-determining step (PDS) = 0.98 eV and dehydrogenation of 1-methyl decalin on Fe-Pt SAC with PDS = 1.49 eV were obtained for the most effective active sites for the enhanced electrochemical process. This study offers new possibilities for the catalytic dehydrogenation and hydrogenation of LOHC systems by highlighting the impact of doping on transition-metal-based catalysts.

1 aVerma, Tushar, Singh1 aSelvaraj, Kaliaperumal1 aKrishnamurty, Sailaja uhttps://library.ncl.res.in/content/effect-doping-electrocatalytic-dehydrogenation-and-hydrogenation-methyl-decalin-methyl