State Key Laboratory of Materials-Oriented Chemical Engineering;
College of Chemical Engineering;
Jiangsu National Synergetic Innovation Center for Advanced Materials;
Nanjing Tech University;
Nanjing 210009;
China;
Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials;
Fudan University;
Shanghai 200433;
China;
Porous carbon nitride; Nickel foam; Hydrogen; Cr(VI); Photocatalysis;