摘要
本工作制备了四种形貌的g-C_(3)N_(4)光催化剂,分别为不规则疏松片状g-C_(3)N_(4)-4、不均匀致密颗粒状g-C_(3)N_(4)-8、管状g-C_(3)N_(4)-24以及不规则管状g-C_(3)N_(4)-32。XRD和XPS测试结果证明四种g-C_(3)N_(4)光催化剂的成功制备。光电性能测试结果表明,中空管状g-C_(3)N_(4)-24具有良好的可见光响应、最小的阻抗及最佳的光电流响应,光生电子和空穴的分离效果最好。以碱性品红(Fuchsin basic)为模拟污染物,考察g-C_(3)N_(4)-24光催化剂的光催化降解性能,结果表明,在可见光的条件下,90 min内其对碱性品红的降解效果能达到86.7%。最后根据活性物种捕获实验对g-C_(3)N_(4)-24光催化剂的光催化机理进行研究,发现·O_(2)^(-)、h^(+)和·OH均为碱性品红降解过程中的活性物质,其中·O_(2)^(-)为最主要的活性物种。
In this work,four g-C_(3)N_(4)photocatalysts including irregular loose flakes g-C_(3)N_(4)-4,granular g-C_(3)N_(4)-8,tubular g-C_(3)N_(4)-24 and irregular tubular g-C_(3)N_(4)-32 were prepared.The results of XRD and XPS proved that four g-C_(3)N_(4)photocatalysts were successfully prepared.The results of the photoelectric performance tests showed that the hollow tubular g-C_(3)N_(4)-24 had good visible light response,minimal impedance and best photocurrent response,indicating the best separation of photogenerated electrons and holes.The photocatalytic degradation performance of g-C_(3)N_(4)-24 photocatalyst was investigated by using fuchsin basic as a simulated pollutant,and the results showed that the degradation of basic magenta could reach 86.7%within 90 min under the conditions of visible light.Finally,the mechanism of g-C_(3)N_(4)-24 photocatalyst was investigated based on the active species capture experiment,and it was found that·O_(2)^(-),h^(+)and·OH were all active species in the degradation process of fuchsin basic,with·O_(2)^(-)being the most dominant active species.
作者
刘月琴
王海涛
郭建峰
赵晓旭
常娜
LIU Yueqin;WANG Haitao;GUO Jianfeng;ZHAO Xiaoxu;CHANG Na(School of Environmental Science and Technology,Tiangong University,Tianjin 300387,China;School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第4期51-57,共7页
Materials Reports
基金
天津市科技计划项目(19PTZWHZ00030)。
