Synthesis and characterization of pure and nano-Ag impregnated chitosan beads and determination of catalytic activities of nano-Ag

被引：10

作者：

Ahmad Z. ^{[1
]}

Maqsood M. ^{[1
]}

Mehmood M. ^{[2
]}

Ahmad M.J. ^{[2
]}

Choudhary M.A. ^{[1
]}

机构：

[1] Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJ and K)

[2] Center of Nanotechnology, Department of Material and Metallurgy, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad

来源：

Bulletin of Chemical Reaction Engineering and Catalysis | 2017年 / 12卷 / 01期

关键词：

Chitosan beads; NaBH[!sub]4[!/sub; Nano-Ag; Nitro reduction;

D O I：

10.9767/bcrec.12.1.860.127-135

中图分类号：

学科分类号：

摘要：

The synthesis of nano-Ag impregnated porous Chitosan beads, in crosslinked and uncrosslinked forms, was aimed to investigate their catalytic potential in reducing nitro group into amino by NaBH4. The material was found unique concerning the synthesis of well-defined Ag NPs and subsequently adsorbing them on its surface. The crosslinked and uncrosslinked chitosan beads were separately analyzed for the loading of Ag and its effect over the microstructures of the substrate. BET was used to explore the porous nature and pore size distributions of beads. At each stage, SEM coupled with EDX, FT-IR, and inductively coupled plasma (ICP) were employed to characterize the material. The catalytic activities of nano-Ag in crosslinked and uncrosslinked beads were determined by the reduction of 4-Nitrophenol (4-NP) into 4-aminophenol (4-AP) by NaBH4; which is least effective for such reduction. The catalytic activities were monitored by UV-Vis spectrophotometer. The results demonstrated the nano-Ag as a reliable and active catalyst which made NaBH4 quite capable for the nitro reduction. Moreover, the catalytic activities of crosslinked chitosan substrate were found more reproducible as compared to the uncrosslinked substrate. Copyright © 2017 BCREC GROUP. All rights reserved.

引用

页码：127 / 135

页数：8

共 28 条

[1]

Senay A., Cetinus H., Nursevin O., Immobilization of Catalase into Chemically Crosslinked Chitosan Beads, Enzyme and Microbial Technology, 32, pp. 889-894, (2003)

[2]

Ming-Shen C., Pang-Yen H., Hsing-Ya L., Adsorption of Anionic Dyes in Acid Solutions Using Chemically Cross-Linked Chitosan Beads, Dyes and Pigments, 60, pp. 69-84, (2004)

[3]

El-Hefian E.A., Nasef M.M., Yahaya A.H., Chitosan Physical Forms: A Short Review, Australian Journal of Basic and Applied Science, 5, pp. 670-677, (2011)

[4]

Jin R., Cao Y.C., Hao E., Metraux G.S., Schatz G.C., Mirkin C.A., Controlling Anisotropic Nanoparticle Growth through Plasmon Excitation, Nature, 425, pp. 487-490, (2003)

[5]

Debarre A., Jaffiol R., Julien C., Tchenio P., Mostafavi M., Scattering from Single Ag Aggregates in Presence of EDTA, Chemical Physics Letters, 386, pp. 244-247, (2004)

[6]

Xu X., Yang Q., Wang Y., Yu H., Chen X., Jing X., Biodegradable Electrospun Poly(L-Lactide) Fibers Containing Antibacterial Silver Nanoparticles, European Polymer Journal, 42, pp. 2081-2087, (2006)

[7]

Liu I., Sonshine D.A., Shervani S., Hurt R.H., Controlled Release of Biologically Active Silver from Nanosilver Surfaces, ACS Nano, 4, pp. 6903-6913, (2010)

[8]

Krishna R.K.S.V., Ramasubba R.P., Lee Y.I., Kim C., Synthesis and Characterization of Chitosan-PEG-Ag Nano Composites for Antimicrobial Application, Carbohydrate Polymers, 87, pp. 920-925, (2012)

[9]

Tsujino K., Matsumura M., Boring Deep Cylindrical Nanoholes in Silicon Using Silver Nanoparticles as a Catalyst, Advanced Materials, 17, pp. 1045-1047, (2005)

[10]

Shimizu K., Miyamoto Y., Satsuma A., Silica-Supported Silver Nanoparticles with Surface Oxygen Species as a Reusable Catalyst for Alkylation of Arenes, Chem. Cat. Chem, 2, pp. 84-91, (2010)

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