Synthesis of carbon quantum dots decorating Bi_(2)MoO_(6) microspherical heterostructure and its efficient photocatalytic degradation of antibiotic norfloxacin  

作　　者：Meijuan Chen Liyun Zhao Xianjin Shi Wei Wang Yu Huang Lijuan Fu Lijun Ma 

机构地区：[1]School of Human Settlements and Civil Engineering,Xi’an Jiaotong University,Xi’an 710049,China [2]Key Lab of Aerosol Chemistry and Physics,State Key Laboratory of Loess and Quaternary Geology(SKLLQG),Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China

出　　处：《Chinese Chemical Letters》2024年第8期373-378,共6页中国化学快报（英文版）

基　　金：funded by the National Science Foundation of China(Nos.42377452,41877481);the Strategic Priority Research Program of the Chinese Academy of Sciences,China(Nos.XDA23010300,XDA23010000);the Opening Fund of Key Laboratory of Aerosol Chemistry and Physics,Institute of Earth Environment,CAS(No.KLACP2002).

摘　　要：In this study,three-dimensional microspherical CQDs/Bi_(2)MoO_(6)heterostructures were synthesized using a simple alcohol-thermal method.It was found that the CQDs/Bi_(2)MoO_(6)had a large specific surface area of 56.0 m^(2)/g,and the introduction of CQDs extended the light absorption spectrum from 480 nm to 496 nm.When utilizing the synthesized CQDs/Bi_(2)MoO_(6)composite for photocatalytic degradation of antibiotic nor-floxacin in a water environment,complete decay of norfloxacin and effective removal of total organic car-bon(TOC)were achieved within 30 min.Through the optimization of material synthesis and experimen-tal conditions,the optimal CQDs loading amount was determined as 200μL,the optimal CQDs/Bi_(2)MoO_(6)dosage was 0.8 g/L.Moreover,the CQDs/Bi_(2)MoO_(6)worked well under a wide pH range of 4.4-10.8.The co-existence of HCO_(3)−enhanced the norfloxacin decay,while the presence of Cl^(−),NO_(3)^(−),and SO_(4)^(2−)slightly retarded it.The synthesized CQDs/Bi_(2)MoO_(6)had the great potential in removing and mineralizing nor-floxacin in real aquatic environments.

关 键 词：Bi_(2)MoO_(6) CQDs HETEROJUNCTION NORFLOXACIN Photocatalysis 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]