摘要
采用简易水解法制备了一系列CNs−Bi_(12)O_(17)Cl_(2)复合半导体材料并对其物相、光学性质和光催化降解性能进行了分析表征。X射线衍射光谱表明复合体系衍射峰与四方晶相Bi_(12)O_(17)Cl_(2)一致,紫外可见漫反射光谱证明复合材料在可见区域具有较强的光吸收能力,由此可提高光催化活性。在可见光照射下,复合体系相对于纯Bi_(12)O_(17)Cl_(2)对亚甲基蓝具有更高的降解效率,特别是具有合适组分的样品CB50可以在180 min后完全去除20 mg·L^(−1)的亚甲基蓝分子,这主要是由于CNs的引入抑制了光生载流子的复合,使复合体系表现出更高的光催化降解性能。最后,提出了可能的光催化机理。
In this study,a series of binary composites CNs-Bi_(12)O_(17)Cl_(2) were prepared through a facile hydrolysis method and their phase composition,optical property and photocatalytic degradation performance were further characterized.Their XRD patterns were consistent with those of tetragonal Bi_(12)O_(17)Cl_(2) phase.In addition,these composites showed relatively enhanced visiblelight absorption capacity.It could reinforce the photocatalytic degradation performance over methylene blue(MB).Especially,the candidate CB50 with suitable composition was able to completely remove 20 mg·L^(−1) MB under visible light after 180 min,which was associated with efficient transfer of charge carriers across interfaces after the incorporation of CNs.Finally,possible photocatalytic mechanism was proposed.
作者
王誉清
常飞
孙俊荣
雷彬
刘登国
WANG Yuqing;CHANG Fei;SUN Junrong;LEI Bin;LIU Dengguo(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Changyi Tianyuan Jiahui Environmental Technology Co.,Ltd,Weifang 261300,China;Central Plains Environmental Protection Co.,Ltd,Zhengzhou 450000,China;Shanghai Environmental Monitoring Center,Shanghai 200235,China)
出处
《能源研究与信息》
CAS
2022年第2期63-69,共7页
Energy Research and Information
基金
国家自然科学基金项目(21207089)
上海市自然科学基金项目(17ZR1419200)。
