金银纳米合金在木聚糖中的绿色合成及其催化性能
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- 英文论文题名：Green synthesis of Au-Ag bimetal nanoparticles and its catalysis
- 论文作者：王小英 ; 蔡济海
- 英文论文作者：Xiaoying Wang ; Jihai Cai ; State Key Laboratory of Pulp & Paper Engineering ; South China University of Technology
- 年：2016
- 作者机构：华南理工大学制浆造纸工程国家重点实验室;
- 论文关键词：金银纳米合金 ; 绿色合成 ; 催化
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TB383.1;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：296k
- 原文格式：D
- 会议级别：全国
摘要
本研究利用金银纳米合金的金属组分之间的协同效应,制备出比单组分纳米金属催化剂更加优异的金银纳米合金催化剂。使用木聚糖作为还原剂和稳定剂连续还原氯金酸和银氨溶液绿色制备金银纳米合金。利用UV-Vis、XRD、XPS、粒径分析和TEM对纳米合金的进行了全方面的表征。结果显示,制备出了金核-银壳结构的纳米合金,并且合成的纳米合金在木聚糖的稳定作用下良好地分散在水中。此外与纳米金的吸收峰相比,纳米合金的表面等离子体共振峰产生一定程度的蓝移,采用先合成纳米金再合成纳米银制备出来的合金粒径小,为30-50 nm。催化硼氢化钠还原对硝基苯酚的结果表明,与纳米金纳米银相比,纳米合金具有更好的催化性能。本研究证明了木聚糖用于绿色制备纳米合金的可能性。
Based on the synergistic effect between components in Au-Ag bimetal nanoparticles, outstanding catalysts were green synthesized, which were more efficient than Au nanoparticles and Ag nanoparticles. Au-Ag bimetal nanoparticles were synthesized by reducing HAu Cl4 and Tollens reagent in setting orders with xylan as reducing and capping agents. UV-vis, XRD, XPS, particle size analysis, and TEM were used to characterize Au-Ag bimetal nanoparticles. UV-vis results revealed that surface plasmon resonance bands of Au-Ag bimetal nanoparticles shifted to low wavelength. Particle size analysis and TEM results showed that the major size of Au-Ag bimetal nanoparticles lied around 40 nm. Compared with Au nanoparticles and Ag nanoparticles, catalytic activities of Au-Ag nanoparticles for the catalytic reduction of ρ-nitrophenol were higher efficient. This study provides the possibility to green synthesize bimetal nanoparticles by using xylan.
Based on the synergistic effect between components in Au-Ag bimetal nanoparticles, outstanding catalysts were green synthesized, which were more efficient than Au nanoparticles and Ag nanoparticles. Au-Ag bimetal nanoparticles were synthesized by reducing HAu Cl4 and Tollens reagent in setting orders with xylan as reducing and capping agents. UV-vis, XRD, XPS, particle size analysis, and TEM were used to characterize Au-Ag bimetal nanoparticles. UV-vis results revealed that surface plasmon resonance bands of Au-Ag bimetal nanoparticles shifted to low wavelength. Particle size analysis and TEM results showed that the major size of Au-Ag bimetal nanoparticles lied around 40 nm. Compared with Au nanoparticles and Ag nanoparticles, catalytic activities of Au-Ag nanoparticles for the catalytic reduction of ρ-nitrophenol were higher efficient. This study provides the possibility to green synthesize bimetal nanoparticles by using xylan.
引文
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[2]Guo,X.;Ye,W.;Sun,H.Y.;Zhang,Q.;Yang,J.nanoscale.2013,5:12582.