铌掺杂氧化锌对罗丹明B的光催化降解性质及机理研究  

Photocatalytic Degradation Mechanism of Rhodamine B by Nb-doped ZnO

作　　者：陈桂娟[1] 汪浦臣 包奥林 CHEN Gui-juan;WANG Pu-chen;BAO Ao-lin(Anhui Vocational and Technical College,Hefei 230011,China)

机构地区：[1]安徽职业技术学院,安徽合肥230011

出　　处：《长春师范大学学报》2022年第6期60-69,共10页Journal of Changchun Normal University

基　　金：2020年安徽高校自然科学研究重点项目“可见光催化剂的合成、加工处理、修饰及其对染料废水的降解性能研究”(KJ2020A1037)。

摘　　要：将Nb_(2)O_(5)和溶胶-凝胶法制得的ZnO经固相煅烧合成法制备出Nb掺杂ZnO作为光催化剂。分别考察了铌掺杂ZnO降解时长、煅烧时间、煅烧温度以及罗丹明B溶液的质量浓度对紫外光的催化效果。研究结果表明,当实验过程中铌的掺杂量为0.5%,降解时长为180 min,煅烧时间为6 h,煅烧温度为400℃时其对罗丹明B(200 mL,10 mg/L)溶液的光催化效果最好。并对Nb最佳掺杂量的ZnO颗粒进行了傅里叶红外光谱表征,高分辨扫描电镜图表征,带隙能分析,拉曼光谱仪表征,X射线光电子能谱表征,分析铌掺杂ZnO催化剂颗粒的光降解效率。Firstly,ZnO was prepared by using Nb_(2)O_(5) and sol-gel method,then Nb-doped ZnO was obtained by solid-phase calcination synthesis and used as photocatalyst.The catalytic effect of the degradation time,calcination time,calcination temperature and the mass concentration of rhodamine B solution on ultraviolet light were analyzed.The results showed that the photocatalytic effect of Nb-doped ZnO on rhodamine B(200 mL,10 mg/L)solution was the best when the doping amount of niobium was 0.5%,degradation time was 180 min,calcination time was 6 h,calcination temperature was 400℃.The Nb-doped ZnO with the optimal doping amount of Nb were characterized by Fourier transform infrared spectroscopy,high-resolution scanning electron microscopy,band gap energy analysis,raman spectroscopy and X-ray photoelectron spectroscopy,and the photodegradation efficiency of Nb-doped ZnO catalyst particles was analyzed.

关 键 词：水处理 光催化剂 印染污水 Nb_(2)O_(5)/ZnO 固相煅烧 

分 类 号：TQ085[化学工程]