TY  - JOUR
AU  - TANG, Hua
AU  - LIU, Yue
AU  - WANG, Lele
AU  - LIU, Qinqin
PY  - 2023
TI  - Photocatalytic Properties and Reaction Mechanism of PDI/ZnIn2S4 S-Scheme Heterojunction
JO  - Journal of the Chinese Ceramic Society
SN  - 0454-5648
SP  - 14
EP  - 22
VL  - 51
IS  - 1
AB  - The construction of step scheme (S-scheme) heterojunction with a great redox ability and a high charge transfer efficiency is an effective strategy to enhance the photocatalytic activity. ZnIn2S4 nanosheets were grown in-situ on the surface of perylenimide (PDI) rods via a solvothermal method. A PDI/ZnIn2S4 heterojunction exhibits an excellent photocatalytic performance due to its tight interfacial contact and matched band structures. Moreover, the 5% PDI/ZnIn2S4 affords high H2/benzaldehyde production rates of 21.66 mmol/(g·h) and 1.02 mmol/(g·h), respectively, which is 2.12 and 3.00 folds of pristine ZnIn2S4, respectively when coupling the photocatalytic H2 evolution and the benzyl alcohol oxidation in the reaction system. Based on the results by X-ray photoelectron spectroscopy, transient photoluminescence spectroscopy and electron paramagnetic resonance analysis, the formation of the built-in electric field at the interface of PDI/ZnIn2S4 and the S-scheme electron transfer path was confirmed. The enhanced photocatalytic performance and stability can be attributed to the close contact and rich active sites of PDI/ZnIn2S4, and the charge carrier migration and increased photoredox properties were improved by a S-scheme charge-transfer route. This organic–inorganic PDI/ZnIn2S4 S-scheme heterojunction photocatalyst can be used as a novel bifunctional photocatalyst in converting solar light into clean fuel and chemicals.
UR  - https://doi.org/10.14062/j.issn.0454-5648.20220352
DO  - 10.14062/j.issn.0454-5648.20220352