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Y和Si共掺杂纳米TiO2的制备及光催化性能
作者:姜建辉1 2 邓臣强1 2  钰1 2 刘永召1 2  伟1 2 
单位:(1. 新疆兵团南疆化工资源利用工程实验室 新疆 阿拉尔 843300 2. 塔里木大学生命科学学院 新疆 阿拉尔 843300) 
关键词:水热法 钇和硅共掺杂 二氧化钛 甲基橙 光催化剂 
分类号:O644
出版年,卷(期):页码:2019,47(7):0-0
DOI:
摘要:

 以自制的Gemini表面活性剂为软模板,钛酸四丁酯、正硅酸四乙酯、硝酸钇为原料,采用水热法制备了Y、Si共掺杂TiO2(Y/Si/TiO2)纳米颗粒。对Y/Si/TiO2纳米颗粒的结构、形貌、光吸收范围及价态进行了表征;以甲基橙为模拟污染物,评价了样品的光催化性能。结果表明:TiO2为单一的锐钛矿相,Y和Si成功的掺杂进入TiO2晶格中;Y和Si掺杂抑制了晶粒长大,结晶度降低,减少了禁带宽度,从而使样品比表面积增大,提高了可见光的响应范围,降低了光生电子?空穴对的复合几率。当掺杂Y和Si的摩尔比为1:1时,1.0%Y/1.0%Si/TiO2催化性能最好,500 W氙灯照射90 min,其降解效率达到95.5%。

 

 Y and Si co-doped TiO2 (Y/Si/TiO2) nanoparticles were synthesized by a hydrothermal method using titanium butoxide, tetraethyl orthosilicate and yttrium nitrate as starting materials, and Gemini surfactant as a soft template. The structure, morphology, light absorption range and valence state of the prepared Y/Si/TiO2 nanoparticles were investigated. The photocatalytic properties of the samples were evaluated by using methyl orange as a simulated pollutant. The results show that TiO2 is a single anatase phase, and Y and Si are doped into TiO2 lattice. Y and Si co-doping inhibits the grain growth and decreases the band gap and crystallinity. Thereby, the specific surface area of the sample increases and the response range of visible light improves, and the recombination probability of the electron–hole pairs reduces. The 1.0%Y/1.0%Si/TiO2 sample has an optimum catalytic performance, and the degradation efficiency reaches 95.5% after 500 W xenon lamp irradiation for 90 min. 

基金项目:
国家自然科学基金(21562035);有机无机复合材料国家重点实验室开放课题(oic-201601010);国家级大学生创新创业训练计划项目(107572017006)资助。
作者简介:
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