化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (1) : 200-206.

科学研究

Ce³⁺掺杂纳米ZnO的制备及其可见光光催化性能研究

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Study on preparation and visible photocatalytic performance of Zn_1-xCe_xO

Chen Lin^1,2, Peng Guoliang², Song Jieguang^1,2, Liu Yue^1,2, Zhang Xiling^1,2, Xiang Yun^1,2

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Received		Published
2018-07-31		2020-01-20
Issue Date	Revised Date
2020-02-11	2018-07-31

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摘要

采用凝胶-燃烧法合成了铈(Ce)掺杂纳米氧化锌(ZnO)(Zn_1-xCe_xO)可见光光催化剂,通过X射线衍射分析(XRD)、场发射扫描电子显微镜(FE-SEM)、紫外-可见吸收光谱(UV-Vis)、傅里叶变换红外(FT-IR)和综合热分析(TG-DSC)对样品的结构、形貌、光催化性能等进行了分析表征。结果表明:所得样品为具有纤锌矿结构的Zn_1-xCe_xO纯相,平均粒径50nm;在Ce³⁺掺入量为x=0.010mol条件下,光催化降解甲基橙的效率为90.69%,降解甲基橙的速率常数为0.1223/min;点火温度和保温时间对光催化效率有较大影响,在点火温度为500℃、保温时间为5min条件下,光催化效率最高;循环使用5次后降解效率为74.31%,具有良好的再生性能。

Abstract

The visible photocatalyst Ce³⁺ doped nano ZnO(Zn_1-xCe_xO) was synthesized by gel-combustion method,and the crystal structure,morphology and photocatalytic performance of Zn_1-xCe_xO was characterized by phase analysis of X-ray diffraction (XRD),field emission scanning electron microscope (FE-SEM),ultraviolet-visible spectroscopy (UV-Vis),fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis-differential scanning calorimetry (TG-DSC) etc.The results showed that the synthesized Zn_1-xCe_xO sample had wurtzite structure with the average size of 50nm.And the photocatalytic degradation rate of methyl orange was 90.69%,when the doping amount of Ce³⁺ was x=0.010mol,and the degradation rate constant of methyl orange was 0.1223/min.The ignition temperature and holding time light had a great influence on the catalytic efficiency,when the ignition temperature was 500℃ and the holding time was 5min,the photocatalytic efficiency was highest.The Zn_0.990Ce_0.010O photocatalyst had good regeneration performance,and its degradation efficiency was 74.31% after cycle used for five times.

关键词

光催化剂 / 可见光 / 凝胶-燃烧法 / Ce³⁺掺杂纳米ZnO

Key words

photocatalyst / visible light / gel-combustion method / Ce³⁺ doped nano ZnO

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Ce³⁺掺杂纳米ZnO的制备及其可见光光催化性能研究[J]. 化工新型材料, 2020, 48(1): 200-206 DOI:

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