alexa Monodisperse Gold Nanoparticles Supported On Rice Husk Silica For Heterogeneous Catalysis Applications
ISSN:2157-7463

Journal of Petroleum & Environmental Biotechnology
Open Access

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World Congress on Petrochemistry and Chemical Engineering
November 18-20, 2013 Hilton San Antonio Airport, TX, USA

Luyi Sun, Yan Li, Davontae L. Habbit, Haoran Chen, Jingjing Liu and Raheim R. Turner
Accepted Abstracts: J Pet Environ Biotechnol
DOI: 10.4172/2157-7463.S1.004
Abstract
Gold nanoparticles (Au NPs) based catalysts have received more and more attentions in the past two decades because of their unique catalytic properties in many important industrial processes. Both the experimental findings and theoretical predictions have demonstrated that the size of Au NPs plays a critical role in governing the catalytic activity. Smaller Au NPs typically exhibit higher catalytic activity. Herein, we report a facile method to synthesize Au NPs based heterogeneous catalyst using silica prepared from rice husks (RHs) as a support. Although silica supported Au NPs have been extensively studied, the silica supports are typically synthesized from TEOS via a sol-gel process. Notably, in this study, silica from RHs was first used as the silica source. The silica nanoparticles obtained by calcining HCl treated RHs, which possess a very rough surface, was first modified by (3-aminopropyl)triethoxysilane (APTES), which was designed to play a dual role: one was to absorb Au precursor (AuCl4 - ) to silica surface and the other was to stabilize the resultant Au NPs obtained by reducing AuCl4 - using sodium borohydride (NaBH4). Characterizations of the nanostructures revealed that the Au NPs were formed with narrow size distribution around 2-5 nm, which was very critical for essential catalytic activities. The RH supported Au NPs exhibited excellent catalytic activity for the reduction of 4-nitrophenol by NaBH 4
Biography
Luyi Sun is an Assistant Professor at Texas State University-San Marcos. He received his Ph.D. degree in chemistry at The University of Alabama. He has published more than sixty peer-reviewed journal articles. He is the inventor/co-inventor of twenty nine issued/pending patents
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