摘要
以硫脲作为N、S源,尿素作为水解调节剂,水热合成了N/S-TiO_(2)催化剂。采用XRD、SEM、XPS等手段对产品进行了表征。产品分散后,以质量浓度为0.02g·L^(-1)的甲基橙水溶液为模拟污染物,采用UV-vis光谱,多点BET分析及光催化实验研究了所得产品的光催化活性效果。实验结果表明:S以+6价形式进入TiO_(2)晶格取代Ti形成Ti-O-S键,N通过取代晶格中的O形成O-Ti-N键而改变了TiO_(2)能带结构。当煅烧温度为500℃时,水热合成出的产品结晶度较高,粒径较小,约17nm左右。光催化活性实验结果表明:当紫外灯照射时间达到1.5h时,N/S-TiO_(2)催化剂降解甲基橙溶液基本完成,脱色率达到96%以上。
N/S-TiO_(2)catalysts were prepared by hydrothermal method with thiourea as the source of nitrogen and sulfur,and urea as hydrolysis modifier.The products were characterized by XRD,SEM and XPS.Photo-catalytic effect was evaluated by UV-vis spectrum,BET analysis and photo-catalytic experimental when MO solution was applied as simulation pollutant whose mass concentration was 0.02g·L^(-1).The experiment result showed that N and S substituted for Ti and O,respectively,in TiO_(2)lattice to form Ti-O-S(+6)and O-Ti-N.The product prepared was of smaller size of about 17 nm,when calcined temperature was 550℃.The photo-catalytic activity result indicated that when exposure time under UV light reached 1.5h,MO degradation completed thoroughly,and the decolorization rate reached higher than 96%.
作者
邢锦娟
彭亮亮
冉林涛
钱建华
许家胜
XING Jinjuan;PENG Liangliang;RAN Lintao;QIAN Jianhua;XU Jiasheng(Liaoning Province Key Laboratory for Synthesis and Application of the Functional Compounds,Bohai University,Jinzhou 121013,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2017年第2期274-277,共4页
Journal of Materials Science and Engineering
基金
辽宁省教育厅创新团队资助项目(LT2015001),辽宁省教育厅科学技术研究一般资助项目(L2015011)
