高暴露(001)面BiOBr/Ti3C2复合光催化剂的制备及其可见光催化性能

doi:10.15541/jim20190629

无机材料学报 ›› 2020, Vol. 35 ›› Issue (11): 1247-1254.DOI: 10.15541/jim20190629

所属专题：环境材料论文精选(2020)

高暴露(001)面BiOBr/Ti₃C₂复合光催化剂的制备及其可见光催化性能

李志锋¹, 谭杰¹, 杨晓飞¹, 蔺祖弘¹, 郇正来¹, 张婷婷^{1, 2}

1. 北京化工大学化学工程学院, 北京 100029;
2. 北京市环境污染控制与资源化工程研究中心, 北京 100029

收稿日期:2019-12-11 修回日期:2020-02-10 出版日期:2020-11-20 网络出版日期:2020-04-05
作者简介:李志锋(1996-), 男, 硕士研究生. E-mail: lzf260cas@163.com.
基金资助:
国家自然科学基金(41977142); 水体污染控制与治理科技重大专项(2018ZX07111003); National Natural Science Foundation of China (41977142); Major Science and Technology Project for Water Pollution Control and Treatment (2018ZX07111003)

Preparation and Visible Light Photocatalytic Performance of BiOBr/Ti₃C₂ Composite Photocatalyst with Highly Exposed (001) Facets

LI Zhifeng¹, TAN Jie¹, YANG Xiaofei¹, LIN Zuhong¹, HUAN Zhenglai¹, ZHANG Tingting^{1, 2}

1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. Beijing Centre for Resource and Environmental Research, Beijing 100029, China

Received:2019-12-11 Revised:2020-02-10 Published:2020-11-20 Online:2020-04-05
About author:LI Zhifeng(1996-), male, Master candidate. E-mail: lzf260cas@163.com

摘要/Abstract

摘要： 通过水解法合成具有高暴露(001)面的BiOBr/Ti₃C₂复合光催化剂, 利用不同手段对样品进行表征。以罗丹明B为目标污染物, 评价了不同样品的可见光催化性能。结果表明, 层状Ti₃C₂添加量为20.0wt%时, BiOBr/Ti₃C₂复合光催化剂在60 min内对罗丹明B的降解效率为97.1%, 比BiOBr的降解效率提高了34.7%。引入层状Ti₃C₂使得BiOBr与Ti₃C₂界面形成肖特基结能垒, 产生有效的电子陷阱抑制了光生电子-空穴对的复合, 从而大大提高了BiOBr的可见光催化活性。BiOBr/Ti₃C₂复合光催化剂经5次循环实验后, 降解效率仍保持在91.0%, 表明其具有良好的稳定性。活性物种捕获实验表明, 超氧自由基为罗丹明B可见光催化降解中的主要活性物种, 并据此提出了可能的光催化机理。

关键词: BiOBr, Ti₃C₂, 可见光催化, 肖特基结

Abstract: BiOBr/Ti₃C₂ composite photocatalyst with highly exposed (001) facets was synthesized by hydrolysis method. Different instruments were employed to characterize the samples. The visible light photocatalytic performance of different samples were evaluated by using Rhodamine B as the target pollutant. The results show that the degradation efficiency of Rhodamine B reaches 97.1% within 60 min over BiOBr/Ti₃C₂(20.0wt% Ti₃C₂addidion) composite photocatalyst, which is 34.7% higher than that of BiOBr. With the introduction of layered Ti₃C₂, the interface between BiOBr and Ti₃C₂ forms the Schottky junction energy barrier, which produces effective electron traps to inhibit the combination of photogenic electron-hole pairs, and greatly improves the visible light photocatalytic activity of BiOBr. After 5 cycles, the degradation efficiency of BiOBr/Ti₃C₂ composite photocatalyst remains 91.0%, showing reliable stability. The active species capture experiment shows that superoxide radical (•O₂^-) is the main active species in the photocatalytic degradation of Rhodamine B, and a possible photocatalytic mechanism is proposed accordingly.

Key words: BiOBr, Ti₃C₂, visible light photocatalysis, Schottky junction

中图分类号:

TQ174

李志锋, 谭杰, 杨晓飞, 蔺祖弘, 郇正来, 张婷婷. 高暴露(001)面BiOBr/Ti₃C₂复合光催化剂的制备及其可见光催化性能[J]. 无机材料学报, 2020, 35(11): 1247-1254.

LI Zhifeng, TAN Jie, YANG Xiaofei, LIN Zuhong, HUAN Zhenglai, ZHANG Tingting. Preparation and Visible Light Photocatalytic Performance of BiOBr/Ti₃C₂ Composite Photocatalyst with Highly Exposed (001) Facets[J]. Journal of Inorganic Materials, 2020, 35(11): 1247-1254.

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高暴露(001)面BiOBr/Ti₃C₂复合光催化剂的制备及其可见光催化性能

Preparation and Visible Light Photocatalytic Performance of BiOBr/Ti₃C₂ Composite Photocatalyst with Highly Exposed (001) Facets

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