CeO2纳米纤维与Bi4O5Br2/Bi12O17Br2异质结重构及其增强可见光催化降解甲醛
Reconstruction Heterojunction of Bi4O5Br2/Bi12O17Br2 by CeO2 Nanofibers and Enhanced Visible Photocatalytic Properties for Degrading Formaldehyde
曹铁平 1李跃军 1孙大伟1
作者信息
- 1. 白城师范学院化学学院,纳米光催化材料研究中心,吉林 白城 137000
- 折叠
摘要
在增强催化剂光催化性能的研究中,构建异质结被认为是一种有效的手段.与typeⅡ异质结相比,typeⅠ异质结由丁界面一侧光生载流子的积累和复合几率增加而受到的关注较少.在此以type Ⅰ异质结Bi4O5Br2/Bi12O17Br2为例,探索提高异质结光催化性能的方法.采用简单、方便的一步水热法,在较低温度下制备了 Bi4O5Br2/CeO2/Bi12O17Br2复合纳米纤维.结果表明,所制备的Bi4O5Br2/CeO2/Bi12O17Br2复合光催化剂具有最佳的光催化降解甲醛性能,可见光下照射8 h,甲醛降解率达到87％,相较于Bi4O5Br2/CeO2,Bi12O17Br2/CeO2和纯CeO2纳米纤维,降解率分别提升了25％,30％和52％.
Abstract
Among the tremendous efforts for enhanced photocatalysis,construction of heterojunction has been re-garded as an effective approach.In comparison to type Ⅱ heterojunction,type Ⅰ heterojunction receives less at-tention due to accumulation and increased recombination of charge carriers in one side of heterojunction.Here-in,we take Bi4O5Br2/CeO2/Bi12O17Br2 as an example of type Ⅰ heterojunction and explore means to improve the photocatalytic performance of Bi4O5Br2/CeO2/Bi12O17Br2 heterojunction.A novel Bi4O5Br2/CeO2/Bi12O17Br2 composite nanofibers photocatalytic was fabricated via a facile and convenient one-step hydrothermal method at lower tem-peratures.Results reveal that Bi4O5Br2/CeO2/Bi12O17Br2 composite photocatalyst displays the optimum photocatalyt-ic performance,and its removal efficiency of formaldehyde reaches 87％under 8 h visible light irradiation,which is improved approximately 25％,30％and 52％,than those of Bi4O5Br2/CeO2,Bi12O17Br2/CeO2 and pure CeO2 nanofibers,respectively.
关键词
CeO2纳米纤维/异质结/可见光催化/甲醛Key words
CeO2 nanofibers/heterojunction/visible light photocatalytic/formaldehyde引用本文复制引用
基金项目
国家自然科学基金项目(21573003)
国家级大学生创新创业项目(202110206008)
出版年
2024
NETL
NSTL
万方数据