College of Materials Science and Engineering and College of Chemical Engineering;
Zhejiang University of Technology;
Hangzhou 310014;
China;
State Key Laboratory of Environment-friendly Energy Materials;
Southwest University of Science and Technology;
Mianyang 621010;
China;
Institute of Nuclear Physics and Chemistry;
China Academy of Engineering Physics(CAEP);
Mianyang 612900;
China;
Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource;
Yancheng Teachers University;
Yancheng 224007;
China;
covalent organic framework nanosheets; ultrathin; photoregulated; metal-free; oxidase mimics;