硅酸盐学报2017，Vol.45Issue(10)：1495-1502,8.DOI:10.14062/j.issn.0454-5648.2017.10.16
Gd掺杂锐钛矿型TiO2光催化剂的制备及降解苯甲羟肟酸活性
Preparation and Degradation Activity for Benzohydroxamic Acid of Gd-doped Anatase TiO2 Photocatalysts
摘要
Abstract
TiO2:x％Gd powder with different doping Gd amounts were prepared by a sol?gel method at different calcination temperatures. The structure and physicochemical properties were characterized. As a typical beneficiation reagent, benzohydroxamic acid was used to examine the photodegradation activity of Gd-doped TiO2. The results indicate that the Gd-doped TiO2 possesses a greater light absorption intensity, smaller particle size and larger specific surface area, compared to pure TiO2. TiO2:0.70％Gd powder calcined at 500℃ shows the highest photocatalytic activity to benzohydroxamic acid. After 120 min irradiation under 300 W mercury lamps at room temperature, the removal efficiency and the total organic carbon (TOC) removal rate are 94.7％ and 79.4％ respectively. It is indicated that most of the benzohydroxamic acid could transform into small molecule organic substances and inorganic materials CO2 and NO3-, based on the analysis of TOC instrument and ion chromatography. In addition, the TiO2:0.70％Gd still has a great photocatalytic activity for the photodegradation of benzohydroxamic acid after 4-times recycling, showing the stability of Gd-doped TiO2.关键词
二氧化钛/光催化剂/掺杂改性/钆掺杂/苯甲羟肟酸Key words
titanium dioxide/photocatalyst/doping and modification/gadolinium doping/benzohydroxamic acid分类
环境科学引用本文复制引用
祝思频,王春英,王俊蔚,罗仙平..Gd掺杂锐钛矿型TiO2光催化剂的制备及降解苯甲羟肟酸活性[J].硅酸盐学报,2017,45(10):1495-1502,8.基金项目
"十二五"国家科技支撑计划项目(2012BAC11B07) （2012BAC11B07）
教育部新世纪优秀人才支持计划(NCET-10-0183) （NCET-10-0183）
国家自然基金项目(51408277) （51408277）
江西省主要学科与技术带头人培养对象计划项目(2010DD01200) （2010DD01200）
"赣鄱英才555工程"领军人才培养计划项目 （）
中国博士后科学基金(2015M582776XE,2016T90967) （2015M582776XE,2016T90967）
江西理工大学清江青年英才支持项目. （）
