金属离子掺杂氧化钛的溶胶-凝胶法制备及其高效光催化染料降解应用
Sol-gel synthesis of metal ions doped TiO2 catalyst with efficient photodegradation of dye pollutant
原海波 1欧阳宇欣 1王梁炳1
作者信息
- 1. School of Materials Science and Engineering,Central South University,Changsha 410083,China;State Key Laboratory for Powder Metallurgy(Central South University),Changsha 410083,China
- 折叠
摘要
水污染问题一直是我们生活中的一大难题.光催化降解水中的有机污染物是一种绿色环保且节约有效的处理方法.氧化钛(TiO2)是最受欢迎的光催化剂之一,具有高氧化能力和优异的稳定性.为了打破宽带隙对光吸附的限制,我们通过溶胶-凝胶法合成了金属离子掺杂的TiO2.掺杂的TiO2在光催化降解亚甲蓝中表现出优异的催化活性与稳定性.在所制备的一系列材料中,V/TiO2和Mo/TiO2对亚甲基蓝的光降解性能最为优异.通过对催化机制的进一步研究,发现V/TiO2和Mo/TiO2的带隙减小,对可见光的响应程度增强.此外,有效光生载流子的产生有助于自由基的生成,进而实现亚甲基蓝的氧化分解.
Abstract
Water pollution problem is a significant trouble in our life.The photodegradation of organic pollutants in water,which is an environmentally friendly and economically feasible approach,has attracted considerable attention.Titanium oxide(TiO2)is one of the most popular photocatalysts with high oxidation ability and excellent stability.In order to break the limitation of light absorption caused by the wide band gap,we synthesized metal ions doped TiO2 via sol-gel method.The doped TiO2 exhibited remarkable activity and stability in photocatalytic degradation of methylene blue(MB).Among the obtained materials,V/TiO2 and Mo/TiO2 had the superior performance of of>98%within 30 min for photodegradation of MB.Further investigation of the mechanism revealed the promoted utilization of solar energy as well as the enhanced electron hole pairs of V/TiO2 and Mo/TiO2,which allowed the boost of catalytic activity.
关键词
TiO2催化剂/溶胶-凝胶法/光催化降解/染料污染Key words
TiO2 catalyst/ions doping/sol-gel method/photocatalytic degradation/dye pollutant引用本文复制引用
基金项目
National Natural Science Foundation of China(51801235)
Natural Science Foundation of Hunan Province,China(2018RS3019)
Natural Science Foundation of Hunan Province,China(2019JJ30033)
Innovation-Driven Project of Central South University,China(2018CX004)
Startup Funding of Central South University,China(502045005)
出版年
2023
NETL
NSTL
维普
万方数据