科学研究

BaTiO3/Ag/AgCl复合光催化剂的制备及其光催化性能研究

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  • 1.陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安 710021;
    2.陕西科技大学化学与化工学院,西安 710021;
    3.西安长庆化工集团有限公司,西安 710018
苏肖彦(1996-),女,硕士研究生,主要研究方向为光催化材料,E-mail:1908033@sust.edu.cn。

收稿日期: 2021-05-22

  修回日期: 2021-09-13

  网络出版日期: 2021-12-31

基金资助

陕西省科技厅科技攻关计划项目(016GY-142);教育部轻化工助剂化学与技术重点实验室开放基金项目(KFKT2019-11)

Preparation and performance of BaTiO3/Ag/AgCl composite photocatalyst

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  • 1. Key Laboratory of Auxiliary Chemiscry & Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science & Technology,Xi'an 710021;
    2. College of Chemistry and Chemical Engineering,Shannxi University of Science &Technology,Xi'an 710021;
    3. Xi'an Changqing Chemical Group Co.,Ltd.,Xi'an 710018

Received date: 2021-05-22

  Revised date: 2021-09-13

  Online published: 2021-12-31

摘要

采用光还原法将AgCl中的Ag+还原为Ag0,同时将其负载于钛酸盐BaTiO3的表面,制备了具有高催化性能的三元复合型光催化剂BaTiO3/Ag/AgCl。利用X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)、X光电子能谱(XPS)、紫外-可见漫反射光谱和荧光光谱等手段对复合光催化剂的物相结构和形貌、元素价态、光学性能等进行了表征,通过在可见光下降解罗丹明B(Rh B)溶液,对复合光催化剂的性能进行了探究。结果表明:以AgNO3为银源,HCl为沉淀剂,得到AgCl并将其负载到BaTiO3表面,当n(AgNO3)∶n(BaTiO3)=20∶100,光还原时间为30min时,所得到的20% BaTiO3/Ag/AgCl复合光催化剂光催化性能最佳,在可见光照射75min后,对Rh B的降解率达到98.1%,捕获剂实验表明O-2为主要活性物种。

本文引用格式

苏肖彦, 樊国栋, 潘谦宏, 李楠, 张晗 . BaTiO3/Ag/AgCl复合光催化剂的制备及其光催化性能研究[J]. 化工新型材料, 2021 , 49(12) : 204 -209 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.12.043

Abstract

The photoreduction method was used to reduce Ag+ in AgCl to Ag0,and at the same time,it was successfully loaded on the surface of titanate BaTiO3 to prepare BaTiO3/Ag/AgCl ternary composite photocatalyst with high performance.Using X-ray diffraction (XRD),field emission scanning electron microscope (FE-SEM),X-ray electron spectroscopy (XPS),ultraviolet-visible diffuse reflectance spectroscopy and fluorescence spectroscopy,the phase structure,morphology,valence state of element and optical properties of the photocatalyst were characterized.The performance of the photocatalyst was explored by degrading rhodamine B (Rh B) solution under visible light.The results shown that AgNO3 was used as the silver source and HCl as the precipitant to obtain AgCl,and load it on the surface of BaTiO3.When n(AgNO3)∶n(BaTiO3)=20∶100 and the photoreduction time was 30min,the obtained 20% BaTiO3/Ag/AgCl had the best performance.After 75min of visible light irradiation,the degradation rate of Rh B reached 98.1%.The capture agent experiment shown that O-2 was the main active species.

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