氮元素掺杂CdS/TiO_2复合光催化剂的制备及表征  

The Preparation and Characterization of N-Doped CdS/TiO_2 Composite Photocatalyst

作　　者：樊慧娟[1] 曹先启[1] 王晶[1,2] 张惠[1,2] 单雯妍[1] 张雪[1] 李胜[1,2] 谭蕾[1,2] 杨艳晶 FAN Hui-juan;CAO Xian-qi;WANG Jing;ZHANG Hui;SHAN Wen-yan;ZHANG Xue;LI Sheng;TAN Lei;YANG Yan-jing(Institute of Petrochemistry,Heilongjiang Academy of Sciences,Harbin 150040,China;Institute of A dvcmced Technology,Heilongjiang Academy of Sciences,Harbin 150020,China)

机构地区：[1]黑龙江省科学院石油化学研究院,黑龙江哈尔滨150040 [2]黑龙江省科学院高技术研究院,黑龙江哈尔滨150020

出　　处：《化学与粘合》2019年第1期9-12,32,共5页Chemistry and Adhesion

摘　　要：以尿素(UA)和TiO_2-P_(25)为原料,经浸渍-焙烧制备出N-TiO_2,经水热法合成出CdS/N-TiO_2复合光催化剂。催化剂的分析表征结果表明,N进入TiO_2的晶格,占据了O的空位,由于N和O的电负性不同,使Ti周围的电子云密度变化;掺杂N后,TiO_2晶型未发生变化,电荷分离效率提高,吸收边发生红移;CdS/N-TiO_2复合光催化剂是CdS与N-TiO_2光学性质的综合表现,扩展了TiO_2的光响应范围,提高了电子-空穴的分离效率,颗粒分布均匀,有利于电荷传输,光催化活性提高,可见光催化分解硫化氢制氢速率可达10327.4μmol/(h·g),高于未掺杂改性的CdS/TiO_2。The N-TiO2 was firstly prepared with UA and TiO2-P25 as raw materials,then the CdS/N-TiO2 composite photocatalysts had been prepared by hydrothermal method.The results of analysis and characterization showed that the N had incorporated into the lattice of TiO2 and occupied the O sites which altered the electron density around Ti.It was indicated from the photocatalytic decomposition of H2S to produce H2 over the above photocatalysts that the photocatalytic properties of CdS/N-TiO2 composite photocatalysts had been evidently improved as a result of a noticeable shift to visible region and the enhancement of the charge separation efficiency.The H2 evolution rates reached 10327.4μmol/(h·g)over CdS/N-TiO2 which was higher than that of CdS/TiO2.

关 键 词：尿素 浸渍-焙烧 复合光催化剂 硫化氢 产氢速率 

分 类 号：TQ426.6[化学工程]