Full
LIN Qing (1983-), male, Ph.D., Associate Professor. E-mail: lnqing@jit.edu.cn
Outline
Zinc oxide (ZnO) is widely used as a photocatalyst in the treatment of organic pollutants in wastewater due to its wide bandgap, high photocatalytic efficiency, and stable chemical properties. Based on the results by X-ray diffraction and transmission electric microscopy, synthesized ZnO remains a highly disordered structure because the crystallization of ZnO is suppressed by ultrasonic atomization. Amorphous ZnO nanoparticles were synthesized by a ultrasonic atomization-assisted microwave sintering method. Amorphous ZnO nanoparticles with a highly disordered structure enhance the absorption at a wavelength of 300 nm. The UV absorption of amorphous ZnO nanoparticles shifts to the lower energy side and is greater than that of crystal ZnO nanoparticles. The forbidden bandwidth of amorphous ZnO nanoparticles reduces to 3.17 eV. The photocatalytic efficiency of amorphous ZnO nanoparticles is improved, and the photocatalytic degradation efficiency of amorphous ZnO nanoparticles on Rhodamine B (RB) is 37% greater than that of crystal ZnO nanoparticles. Ultrasonic atomization-assisted microwave sintering method could be an effective method for preparing amorphous ZnO nanoparticles at a low temperature and a low energy consumption. Amorphous ZnO nanoparticles are a highly efficient photocatalyst. However, since the photocatalytic efficiency of amorphous ZnO nanoparticles could decrease with increasing the catalytic cycles, the stability and dispersion of amorphous ZnO nanoparticles should be thus further improved.
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| 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 |
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