摘要
环境污染是工业生产过程中亟需解决的一项重要问题,通过生物模板法合成了多孔异质结g-C_(3)N_(4)/TiO_(2)光催化剂,在降解甲基橙废水过程中显示高效的光催化性能。酵母菌作为软模板剂为材料提供了多孔结构和大比表面积,增加了水溶液中活性反应位点;同时,g-C_(3)N_(4)/TiO_(2)异质结结构作为电子转移通道,太阳光照射时,在内电场和库伦力作用下,氧化还原性较弱的电子和空穴互相结合,氧化还原能力较强的电子-空穴对保留下来。自由基捕获实验揭示了光照条件下复合材料周围出现的·OH和O_(2)^(-)分子,是光催化降解过程的主要作用成分。因此,生物模板法制备的多孔异质结g-C_(3)N_(4)/TiO_(2)是一种具有前景的降解有机染料废水的光催化剂。
Environmental pollution is an important problem that needs to be solved in the process of industrial production.We synthesized g-C_(3)N_(4)/TiO_(2)heterojunction photocatalyst by biological template method,which showed better photocatalytic performance than pure TiO_(2)water solution in the process of degrading MO wastewater.The Yeast as soft biological template provided the materials with a porous structure and a large specific surface area,which increased the reactive sites in the aqueous solution and respectively,the g-C_(3)N_(4)/TiO_(2)heterojunction structure acted as an electron transfer channel.light conditions,by the influence of internal electric field and Coulomb force,relatively useless electron-hole pairs got recombination and supreme redox ability electron-hole pairs are retained,respectively the retained electron-hole pairs provied the materials with the strongest redox capacity.XPS analysis verified that the direction of electron transfer was from g-C_(3)N_(4)to TiO_(2)The radical trapping experiment revealed that·OH and O_(2)^(-)molecules appeared around the composites,which were the main active ingredient in the photocatalytic degradation process.Therefore,the g-C_(3)N_(4)/TiO_(2)composites prepared by the biotemplate and calcination method are promising photocatalysts for degrading organic dye wastewater.
作者
王智远
田伟光
余伟
刘忠将
王润兵
付宇奇
薛成斌
江寒梅
贾碧
WANG Zhiyuan;TIAN Weiguang;YU Wei;LIU Zhongjiang;WANG Runbin;FU Yuqi;XUE Chengbin;JIANG Hanmei;JIA Bi(School of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;School of Metallurg and MaterialsEngineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第12期12096-12103,共8页
Journal of Functional Materials
基金
国家自然科学基金项目(11972100)
重庆市技术创新与应用发展专项(cstc2019jscx-fxydX0075)
重庆英才计划项目(cstc2021ycjh-bgzxm0347)。
