CHENG Hongfei (1983-), male, Ph.D., Professor. E-mail: h.cheng@chd.edu.cn
A new two-dimensional layered mesoporous kaolinite based photocatalysis composite with strong visible light response and high photocatalytic efficiency was successfully prepared by acid-base etching and thermal polymerization, using mesoporous kaolinite (PK) as carrier and dicyandiamide as precursor. The crystal structure, molecular composition, microstructure, specific surface area, pore structure, and photochemical properties of the photocatalytic composites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, specific surface area test, UV-Vis absorption spectroscopy, electrochemical impedance spectroscopy and other detection methods. The results show that when the mass ratio of PK to g-C3N4 (GCN) is 1∶3, the prepared PK/GCN-3 composite has a larger specific surface area (25.9 m2/g) and a wider visible light absorption threshold (517 nm). The apparent reaction rate constant of PK/GCN-3 in terms of the degradation of Rhodamine B dye was 5 times that of pure GCN after 6 h visible light irradiation.
| 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 |