Preparation of Bismuth Nanoparticles in Aqueous Solution and Its Catalytic Performance for the Reduction of 4-Nitrophenol
Preparation of Bismuth Nanoparticles in Aqueous Solution and Its Catalytic Performance for the Reduction of 4-Nitrophenol
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DOI：
10.1021/ie501142a
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发表时间：
2014-07-02
影响因子：
4.2
通讯作者：
Gao, Jianping
中科院分区：
文献类型：
--
作者：
Xia, Fengling;Xu, Xiaoyang;Gao, Jianping
在可溶性淀粉存在下，利用硼氢化钠与柠檬酸铋铵在水相中的氧化还原反应制备了铋纳米粒子。结果表明，可溶性淀粉对纳米铋的稳定性优于PVP。采用傅里叶变换红外光谱、透射电子显微镜、能量色散X射线衍射和粉末X射线衍射对所制备的Bi纳米粒子进行了表征。以硼氢化钠为催化剂，研究了纳米铋对4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP）的催化性能。还研究了硼氢化钠浓度、4-NP初始浓度、催化剂剂量和还原温度的影响。
A simple method to fabricate Bi nanoparticles by using redox reactions between sodium borohydride and ammonium bismuth citrate in the presence of soluble starch in water phase was developed. The results show that soluble starch is better than PVP in stabilizing Bi nanoparticles. The as-prepared Bi nanoparticles were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, energy-dispersive X-ray, and powder X-ray diffraction. The catalytic performance of the Bi nanoparticles for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of sodium borohydride was studied. The effects of sodium borohydride concentration, initial 4-NP concentration, catalyst dose, and reduction temperature were also investigated.