TANG Hua (1979-), male, Ph.D., Professor. E-mail: huatang79@163.com
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.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |