X射线光电子能谱
催化作用
4-硝基苯酚
光催化
纳米颗粒
傅里叶变换红外光谱
材料科学
壳聚糖
漫反射红外傅里叶变换
扫描电子显微镜
电催化剂
选择性催化还原
透射电子显微镜
核化学
化学工程
纳米技术
化学
电化学
电极
物理化学
有机化学
复合材料
工程类
作者
Yan Guo,Mingming Dai,Zhixu Zhu,Yuqi Chen,Hao He,Tianheng Qin
标识
DOI:10.1016/j.apsusc.2019.02.246
摘要
Chitosan modified cuprous oxide (Cu2O-CTS) were prepared via facile chemical reduction method. The morphology and structure of Cu2O-CTS nanoparticles were characterized by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy. The catalytic ability of Cu2O-CTS, both in photocatalysis and electrocatalysis, was carried out on p-nitrophenol reduction. In comparison with the pristine Cu2O, Cu2O-CTS exhibits improved photocatalytic abilities with the reduction rate increased by 1.7 times. The catalytic capacity increases along with the increased proportion of CTS in Cu2O-CTS nanoparticles. Cu2O-CTS modified electrodes shows enhanced electrocatalytic capacities as well, with more positive reduction peak potential and higher peak current. Based on the experimental results, a catalytic mechanism for p-NP reduction over Cu2O-CTS catalysts is proposed. The improvement might come from the reduced band gap energy after the chitosan modification, thus Cu2O-CTS nanoparticles have higher catalytic activity. On the other hand, the more beneficial (111) crystal surface involves in the improvement as well, which endows Cu2O-CTS stronger activity and interaction with p-nitrophenol.
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