高压辅助溶胶-凝胶法制备La掺杂TiO2光催化剂及其可见光降解甲基橙研究

doi:10.11896/cldb.22080236

材料导报

2024, Vol. 38

Issue (2): 22080236-5 https://doi.org/10.11896/cldb.22080236

无机非金属及其复合材料

高压辅助溶胶-凝胶法制备La掺杂TiO₂光催化剂及其可见光降解甲基橙研究

王雪怡¹, 王智远¹, 余伟², 周冰鑫², 徐榕², 杨兴东³, 何辉超^2,*, 贾碧^2,*

1 重庆科技学院化学与化工学院,重庆 401331
2 重庆科技学院冶金与材料工程学院,重庆 401331
3 重庆国际复合材料股份有限公司,重庆 400037

Preparation of La Doped TiO₂ Photocatalyst by High Pressure Assisted Sol-Gel Method and Its Visible Light Degradation of Methyl Orange

WANG Xueyi¹, WANG Zhiyuan¹, YU Wei², ZHOU Bingxin², XU Rong², YANG Xingdong³, HE Huichao^2,*, JIA Bi^2,*

1 School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
2 School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
3 Chongqing International Composite Material Company Limited, Chongqing 400037, China

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摘要根据溶胶-凝胶法和水热法制备TiO₂的优点和不足,本工作提出了一种高压辅助溶胶-凝胶法(简称HG法)可控地制备La掺杂TiO₂。通过该方法,可以高效制备锐钛矿相La掺杂TiO₂,且制得样品纯度高,分散性好。通过控制La掺杂比例(0.05%、0.10%、0.15%、0.20%、0.25%,质量分数,下同),可以调控TiO₂禁带宽度变化(3.15～2.80 eV);其中,0.20%La掺杂TiO₂(0.20%La-TiO₂)的禁带宽度可达2.80 eV。甲基橙(MO)光催化降解实验结果表明,0.20%La-TiO₂的光催化活性优异,其在可见光照射下160 min内对MO的降解率可达92%,是本征TiO₂的38.30倍;·O₂^-是驱动0.20%La-TiO₂光催化降解MO的主要活性物质。本工作提出的高压辅助溶胶-凝胶法可为制备高活性TiO₂基光催化剂提供有益的方法及条件参考。

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	王雪怡
	王智远
	余伟
	周冰鑫
	徐榕
	杨兴东
	何辉超
	贾碧

关键词: 光催化活性 La掺杂TiO₂ 锐钛矿相高压辅助溶胶-凝胶法

Abstract: Based on the advantages and disadvantages of the sol-gel method and hydrothermal method in TiO₂ preparation, a high pressure assisted sol-gel method was developed for the controllable preparation of La doped TiO₂. Anatase La doped TiO₂ with high purity and good dispersion was successfully prepared by this method. By the control of La doping ratios (0.05%, 0.10%, 0.15%, 0.20%, 0.25%), the band gap of La doped TiO₂ can be adjusted in a range of 3.15—2.80 eV, and the 0.20%La doped TiO₂ (0.20%La-TiO₂) had a narrowest band gap of 2.80 eV. The photocatalytic experiments of methyl orange (MO) degradation showed that 0.20%La-TiO₂ has higher photocatalytic activity than the others La doped TiO₂ and the pristine TiO₂. In the 0.20%La-TiO₂-based reaction system, the degradation rate of MO under visible light irradiation could reach 92% within 160 min. The photocatalytic activity of 0.20%La-TiO₂ is 38.30 times higher than that of the pristine TiO₂. The as-developed high pressure assisted sol-gel method in the present work could provide a useful method and condition reference for the preparation of highly active TiO₂-based photocatalysts.

Key words: photocatalytic activity La doped TiO₂ anatase high pressure assisted sol-gel process

出版日期: 2024-01-25 发布日期: 2024-01-26

ZTFLH:

O643.3

基金资助: 重庆科技学院科研项目经费 (ckrc2022003)

通讯作者: *贾碧,重庆科技学院冶金与材料工程学院教授,重庆科技学院环境能源材料与智能装备研究院常务副院长、硕士研究生导师;主要从事先进陶瓷材料与器件,光催化污水处理智能装备研发工作。近年来,主持和承担包括国家 “863”项目子课题、重庆市科委重点项目在内的等各级科研课题20余项;公开发表科研论文50余篇;获授权发明专利7项和实用新型专利18项;主持完成科研成果转化项目100余项。18696617359@163.com
何辉超,重庆科技学院冶金与材料工程学院副教授、硕士研究生导师。2014年重庆大学化学工程与技术专业博士毕业,主要从事光催化环境净化材料及绿氢制取催化材料研究。近年来,主持承担各级纵向研究课题10余项,以第一作者或通信作者身份发表论文40余篇,包括Advanced Functional Materials、ACS Catalysis、Green Chemistry、Journal of Materials Chemistry A、Journal of Physical Chemistry Letters、Chemical Communications等;获授权发明专利4项。hehuichao@cqust.edu.cn

作者简介: 王雪怡,重庆科技学院在读硕士研究生,主要从事光催化降解污水研究。

引用本文:

王雪怡, 王智远, 余伟, 周冰鑫, 徐榕, 杨兴东, 何辉超, 贾碧. 高压辅助溶胶-凝胶法制备La掺杂TiO₂光催化剂及其可见光降解甲基橙研究[J]. 材料导报, 2024, 38(2): 22080236-5.
WANG Xueyi, WANG Zhiyuan, YU Wei, ZHOU Bingxin, XU Rong, YANG Xingdong, HE Huichao, JIA Bi. Preparation of La Doped TiO₂ Photocatalyst by High Pressure Assisted Sol-Gel Method and Its Visible Light Degradation of Methyl Orange. Materials Reports, 2024, 38(2): 22080236-5.

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http://www.mater-rep.com/CN/10.11896/cldb.22080236 或 http://www.mater-rep.com/CN/Y2024/V38/I2/22080236

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