Anurag Roy; Sasireka Velusamy; Tapas K. Mallick; Senthilarasu Sundaram
Abstract
Domestic food waste chicken eggshells can produce naturally abundant protein-based eggshell membranes (ESMs), which is used as a less-explored source of sulphur to synthesize hexagonal CdS nanoparticles (NPs) under 365 nm (UVA) light irradiation. The perspective of CdS NPs synthesis in the way of UVA ...
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Domestic food waste chicken eggshells can produce naturally abundant protein-based eggshell membranes (ESMs), which is used as a less-explored source of sulphur to synthesize hexagonal CdS nanoparticles (NPs) under 365 nm (UVA) light irradiation. The perspective of CdS NPs synthesis in the way of UVA light irradiation soakage technique using ESM is distinctive compare to other traditional methods. Various physicochemical methods were employed to validate the formation of CdS NP using ESM assisted process. The obtained NPs exhibit an average particle size of ~5 nm as obtained from the transmission electron microscopy study. The capability of the synthesized CdS NPs was further explored in the catalysis reaction for the decomposition of KMnO4, considered as toxic Mn VII (violet) ion source at room temperature. The degradation results as monitored by UV-Vis spectrophotometry analysis confirms the CdS NPs exhibit excellent catalytic activity towards the reduction of KMnO4, toxic Mn VII (violet) ion to MnO2 as non-toxic Mn IV (brownish yellow) ion in aqueous solution (pH 7.0) at room temperature by 50 min. The KMnO4 decomposition reaction follows a pseudo-first-order reaction having the rate constant value of 1.9 x 10 -2 min -1 . This study encourages the potential use of natural waste materials for wastewater treatment.
Ashutosh Tiwari
Abstract
International Association of Advanced Materials (IAAM) proudly announces ‘Researcher of the year’ award every year to recognize the contribution of scientists towards the advancement of materials for global excellence. This year, the award is presented to eminent physicist Prof. Enge Wang, ...
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International Association of Advanced Materials (IAAM) proudly announces ‘Researcher of the year’ award every year to recognize the contribution of scientists towards the advancement of materials for global excellence. This year, the award is presented to eminent physicist Prof. Enge Wang, Vice President of Chinese Academy of Sciences (CAS) and President Emeritus of Peking University, China, for his contribution towards the nanotechnology research and innovations. He is one of the leading contributors in the field of surface physics; the approach is a combination of atomistic simulation of nonequilibrium growth and chemical vapor deposition of light-element nanomaterials. © VBRI Press.
P. V. Ramana; A. Viswadevarayulu; K. Kumar; S. Adinarayana Reddy
Abstract
The potential of a novel photocatalyst graphene-ZnO (G-ZnO) obtained from graphene oxide and zinc acetate dihydrate was investigated for the reduction of heavy metal Cr(VI) ions from water. In which ZnO nanocubic crystals were finely doped on the graphene sheets, was well done by facile wet chemical/reflux ...
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The potential of a novel photocatalyst graphene-ZnO (G-ZnO) obtained from graphene oxide and zinc acetate dihydrate was investigated for the reduction of heavy metal Cr(VI) ions from water. In which ZnO nanocubic crystals were finely doped on the graphene sheets, was well done by facile wet chemical/reflux method under N2 atmosphere. Due to hindered nature of photo-generated electron-hole pair recombination and enhanced light absorption shows efficient photocatalytic performance of G-ZnO nanocomposites (NCs) in the reduction of Cr(VI) ions with a degradation rate of 98% under daylight illumination as related with bare ZnO (42%), graphene oxide (GO) (19%) and mechanical mixture GO+ZnO (62%). The overall results demonstrated that the photocatalyst used in this study, is promising, efficient and economical when used to separate heavy metal ions from water.
S. B. Raut; S. J. Dhoble;R. G. Atram
Abstract
For the application in organic light-emitting diodes, the efficient new derivative of 2, 4-diphenyl quinoline i.e., 2(2’,4’-dichloro phenyl)-4-phenyl quinoline (dichloro-DPQ) has been synthesized by Friedlander condensation at 140°C. Blended films of dichloro-DPQ with poly (methyl methacrylate) ...
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For the application in organic light-emitting diodes, the efficient new derivative of 2, 4-diphenyl quinoline i.e., 2(2’,4’-dichloro phenyl)-4-phenyl quinoline (dichloro-DPQ) has been synthesized by Friedlander condensation at 140°C. Blended films of dichloro-DPQ with poly (methyl methacrylate) (PMMA) and polystyrene (PS) at different weight % concentrations like 10, 5 and 1 wt% have been prepared. Structural and optical characterization techniques were used to characterize the crystalline powder. The photoluminescence in synthesized dichloro-DPQ polymeric compound shows emission peak in blue region at 462 nm in powder form and PL emission in dichloro-DPQ with PMMA and PS with different wt%; we get hypsochromic shift. Optical properties of dichloro-DPQ make it possible candidate material as blue organic phosphor for the field of light industry.
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