TiO2-Al2O3复合粉体的制备及光催化性能

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (12): 4477-4486.

所属专题：新型功能材料

• 新型功能材料 • 上一篇

TiO₂-Al₂O₃复合粉体的制备及光催化性能

段宁¹, 李崇瑞¹, 陆成龙^2,3, 张银凤², 张湘泰¹, 熊江敏¹

1.武汉科技大学资源与环境工程学院,武汉 430081;
2.湖北理工学院矿区环境污染控制与修复湖北省重点实验室,黄石 435003;
3.湖北理工学院先进材料制造与固废资源化协同技术湖北省工程研究中心,黄石 435003

收稿日期:2022-07-11 修订日期:2022-08-27 出版日期:2022-12-15 发布日期:2023-01-11
通信作者: 陆成龙,博士,副教授。E-mail:cjwust@126.com
作者简介:段宁(1976—),女,副教授。主要从事水处理工艺及功能材料方向的研究。E-mail:dn828@163.com
基金资助:
矿区环境污染控制与修复湖北省重点实验室开放基金(2021XZ103)

Preparation and Photocatalytic Performance of TiO₂-Al₂O₃ Composite Powder

DUAN Ning¹, LI Chongrui¹, LU Chenglong^2,3, ZHANG Yinfeng², ZHANG Xiangtai¹, XIONG Jiangmin¹

1. School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation, Hubei Polytechnic University, Huangshi 435003, China;
3. Hubei Engineering Research Center for Collaborative Technology of Advanced Material Manufacturing and Solid Waste Recycling, Hubei Polytechnic University, Huangshi 435003, China

Received:2022-07-11 Revised:2022-08-27 Online:2022-12-15 Published:2023-01-11

摘要/Abstract

摘要： Al₂O₃陶瓷膜在过滤染料废水过程中容易被染料大分子堵塞,导致Al₂O₃陶瓷膜水通量下降。以钛酸丁酯、异丙醇铝为前驱体,采用溶胶-凝胶法制备Ti(OH)₄-AlOOH复合溶胶,经450 ℃烧成获得TiO₂-Al₂O₃复合粉体。以SEM、纳米粒度/电位仪作为主要表征手段,研究了不同Ti(OH)₄和AlOOH摩尔比对复合溶胶粒径分布的影响,进而探究TiO₂-Al₂O₃复合粉体的光催化性能。结果表明,Ti(OH)₄和AlOOH摩尔比为0~0.4时,随着Ti(OH)₄和AlOOH摩尔比的增大,胶粒的平均粒径从67.5 nm减小到34.0 nm,Ti(OH)₄-AlOOH复合溶胶的电位从43 mV升高至53 mV。当Ti(OH)₄和AlOOH摩尔比为0.4时,复合粉体对结晶紫的去除率高达79.3%,反应速率常数增大到了0.018 min^-1。TiO₂-Al₂O₃复合粉体制备的陶瓷膜能有效降解表面沉积的大分子,解决了陶瓷膜堵塞的问题。

关键词: TiO₂-Al₂O₃复合粉体, 溶胶-凝胶法, 陶瓷膜, 光催化, 降解, 粒度

Abstract: The Al₂O₃ ceramic filter membrane is easily clogging by dye macromolecules during the process of filtering dye wastewater, resulting in a decrease in the water flux of the Al₂O₃ ceramic filter membrane. Ti(OH)₄-AlOOH composite sol was prepared by the sol-gel method with butyl titanate and aluminum isopropoxide as precursors, and TiO₂-Al₂O₃ composite powder was obtained by heating at a temperature of 450 ℃. The influence of the molar ratio of Ti(OH)₄ and AlOOH on the particle size distribution of composite sols and the photocatalytic performance of TiO₂-Al₂O₃ composite powders was characterized by using SEM, nanoparticle size/potential meter. The results show that when the molar ratio of Ti(OH)₄ and AlOOH is between 0 and 0.4, the average particle size of the colloidal particles decreases from 67.5 nm to 34.0 nm with the increase of the molar ratio of Ti(OH)₄ and AlOOH, and the Zeta potential of the Ti(OH)₄-AlOOH composite sol increases from 43 mV to 53 mV. When the molar ratio of Ti(OH)₄ and AlOOH is 0.4, the removal rate of crystal violet by composite powder up to 79.3%, and the reaction rate constant increases to 0.018 min^-1. The ceramic membrane prepared by TiO₂-Al₂O₃composite powder can effectively degrade the macromolecules deposited on the surface, and solve the problem of clogging of the ceramic membrane.

Key words: TiO₂-Al₂O₃ composite powder, sol-gel method, ceramic membrane, photocatalysis, degradation, particle size

中图分类号:

O643
X703

段宁, 李崇瑞, 陆成龙, 张银凤, 张湘泰, 熊江敏. TiO₂-Al₂O₃复合粉体的制备及光催化性能[J]. 硅酸盐通报, 2022, 41(12): 4477-4486.

DUAN Ning, LI Chongrui, LU Chenglong, ZHANG Yinfeng, ZHANG Xiangtai, XIONG Jiangmin. Preparation and Photocatalytic Performance of TiO₂-Al₂O₃ Composite Powder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(12): 4477-4486.

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TiO₂-Al₂O₃复合粉体的制备及光催化性能

Preparation and Photocatalytic Performance of TiO₂-Al₂O₃ Composite Powder

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