SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)异质结的制备及其光催化活性的研究  

Preparation of SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)heterojunction and study on its photocatalytic activity

作　　者：王景州 张喜生[1] 马紫微[1] 姚陈忠[1] WANG Jing-zhou;ZHANG Xi-sheng;MA Zi-wei;YAO Chen-zhong(Department of Physics and Electronic Engineering,Yuncheng University,Yuncheng 014000,China)

机构地区：[1]运城学院物理与电子工程系,山西运城014000

出　　处：《现代化工》2023年第2期98-103,共6页Modern Chemical Industry

基　　金：运城学院博士科研启动项目(YQ-2020001);优秀博士来晋科研专项(QZX-2020008);国家自然科学基金项目(U1810110);运城学院物理学学科建设项目。

摘　　要：采用水热法合成SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)(SnO_(2)/NMTO)异质结,考察了SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)对罗丹明B(RhB)的光催化活性。结果表明,SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)的光催化活性优于NMTO和SnO_(2),SnO_(2)的质量分数为10.0%时,具有最好的光催化活性;光照时产生的光生电子大部分迁移到界面处,有助于延长光生电子-空穴对的寿命,从而提高其光催化性能。瞬态光电流响应结果证实,光生电子-空穴对得到了有效分离。SnO_(2)/Na_(0.9)Mg_(0.45)Ti_(3.55)O_(8)(SnO_(2)/NMTO)heterojunction is synthesized through a hydrothermal technique,and its photocatalytic activity for Rhodamine B(RHB)is investigated.The results show that the photocatalytic activity of SnO_(2)/NMTO is better than NMTO as well as SnO_(2)in terms of the degradation of RhB.SnO_(2)/NMTO has the best photocatalytic activity when it contains 10%of SnO_(2).Most of the photogenerated electrons generated during illumination migrate to the interface,which is helpful in prolonging the lifetime of photogenerated electron-hole pairs,thus enhancing the photocatalytic performance of SnO_(2)/NMTO.The results from transient photocurrent responses confirm that photogenerated electron-hole pairs are effectively separated.

关 键 词：水热法 异质结 SnO_(2)/NMTO 电荷分离 光催化活性 

分 类 号：O733[理学—晶体学]