Controlled Synthesis of Higher Interfacial Electron Transfer Graphite‐Like Carbon Nitride/Perylenetetracarboxylic Diimide Heterogeneous for Enhanced Photocatalytic Activity
Hong Miao, Jun Yang, Yuqiang Sheng, Wenlu Li, Yongfa Zhu
Abstract
To exploit the noble‐metal‐free, highly efficient and broad‐spectrum responsive photocatalyst of perylenetetracarboxylic diimide (PDI), a self‐assembled PDI nanowire is loaded on the surface of a graphite‐like carbon nitride (g‐C 3 N 4 ) nanosheet and forms an all‐organic supramolecular 1D/2D heterogeneous g‐C 3 N 4 /PDI with broad‐spectrum responsiveness (254–700 nm), which can improve the absorption efficiency of solar energy. In the g‐C 3 N 4 /PDI system, the π–π conjugated bond in the g‐C 3 N 4 /PDI can accelerate the photoinduced charge carrier transfer. On the other hand, the interlaced band structure between the g‐C 3 N 4 and PDI and the Z‐scheme pathway of the carriers leads to the spatial separation of redox reaction sites. Therefore, the g‐C 3 N 4 /PDI photocatalyst reaches strong redox ability in the photocatalytic process. In detail, the photocatalytic phenol degradation of g‐C 3 N 4 /PDI (0.837 h −1 ) is enhanced 2.67 and 9.19 times higher as the pure PDI and g‐C 3 N 4 , respectively, under the full spectra. Meanwhile, the H 2 evolution activity of the g‐C 3 N 4 /PDI (1649.93 μmol g −1 h −1 ) is 2.03 times higher than g‐C 3 N 4 nanosheet (814.03 μmol g −1 h −1 ).