Construction of novel g-C_(3)N_(4)/β-FeOOH Z-Scheme heterostructure photocatalyst modified with carbon quantum dots for efficient degradation of RhB  

作　　者：Juhua Luo Xing Liu Jieliang Gu Wenjie Zhao Minming Gu Yu Xie 

机构地区：[1]School of Materials Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,China [2]Jiangsu Provincial Key Laboratory of Eco-Environmental Materials,Yancheng Institute of Technology,Yancheng 224051,China [3]College of Environment and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China

出　　处：《Journal of Materials Science & Technology》2024年第14期11-19,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21667019,22066017).

摘　　要：The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very efficient.Herein,in order to obtain efficient visible-light photocatalysts,g-C_(3)N_(4)/β-FeOOH-modified carbon quantum dots(CDs)composite photocat-alysts with Z-Scheme charge transfer mechanism were successfully synthesized.The phase composition and morphology of the composite were characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectrophotometry(FT-IR),and X-ray photoelectron spectroscopy(XPS)techniques.Due to the upconversion effect of the CDs,the optical response range of the composite was effectively widened,and the optical utilization rate was improved.The Z-Scheme heterostructure not only improves the light trapping ability,significantly inhibits charge-carrier complexation,and realizes the spatial separation of redox sites,but also ensures that the photocatalyst maintains a suitable valence-conductivity band position and maintains the strong redox reactivity.In addition,CDs have the unique characteristics of electronic storage and transfer,which effectively enhance the quantum separation efficiency of the composite.The photocatalytic efficiency was measured by degrading rhodamine B(RhB)under visible light.The degradation performance was the best when the weight ratio of CDs was 6%,and the RhB solution degradation rate reached 100%in 60 min.The unique structure and reliable mechanism provide a way for the development of advanced photocat-alyst.

关 键 词：PHOTOCATALYST DEGRADATION Visible light g-C_(3)N_(4) Carbon quantum dots 

分 类 号：TQ127.11[化学工程—无机化工]