CDs负载的片层状g-C_(3)N_(4)增强光催化降解四环素  

CDs-supported lamellar g-C_(3)N_(4) enhances photocatalytic degradation of tetracycline

作　　者：张煜欣 陈晓玲 薛小刚[2] ZHANG Yuxin;CHEN Xiaoling;XUE Xiaogang(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;School of Optoelectronic Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学光电工程学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2024年第5期452-457,共6页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(51762011);桂林电子科技大学研究生教育创新计划(2022YCXS190)。

摘　　要：纯g-C_(3)N_(4)的高缺陷密度、低比表面积和较高的带隙能量严重限制了其光催化效率,可通过对催化剂的前驱体进行掺杂改性来提高其光催化活性。通过对CDs改性的二氰二胺进行热处理,制备CDs改性的片层状g-C_(3)N_(4);通过XRD、FT-IR、UV-Vis、SEM、TEM等表征手段证实所得材料的组成,并对其光催化活性进行系统测试。结果表明,所制备的4-CDs-CN对TC具有更强的降解效果,1h内的降解率达到80.7%,比纯g-C_(3)N_(4)(50.5%)提高了59.8%;CDs的负载促进了光生载流子的分离,提升了光催化活性。CDs-CN复合催化剂的制备为无金属碳基半导体光催化材料的制备提供了一种新的思路。The high defect density,low specific surface area and high band gap energy of pure g-C_(3)N_(4) seriously limit its photocatalytic efficiency,the photocatalytic activity can be improved by doping the precursor of the catalyst.CDs modified lamellar g-C_(3)N_(4) was prepared by heat treatment of CDs modified dicyandiamide.The composition of the materials was confirmed by XRD,FT-IR,UVVis,SEM and TEM,and the photocatalytic activity was systematically tested.The results show that the prepared 4-CDs-CN has stronger degradation effect on TC,and the degradation rate reaches 80.7% within 1 hour,which is 59.8% higher than that of pure g-C_(3)N_(4)(50.5%).The loading of CDs promotes the separation of photogenerated carriers and enhanced the photocatalytic activity.The aerogel provides a new way for the preparation of metal-free carbon-based semiconductor photocatalytic materials.

关 键 词：生物质 碳点 g-C_(3)N_(4) 光催化 降解 四环素 

分 类 号：O643.36[理学—物理化学] X701[理学—化学]