Full
Outline
Shock transformation and shock-induced chemical reaction in materials can lead to their obvious changes of physical and chemical properties. In this paper, the powder mixtures of nitrogen-rich of C2N4H4 and P25 TiO2 or metatitanic acid were shocked by the impact of flyer plates driven by explosive detonation, and the recovered samples were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller (BET) surface area analysis and UV-Vis spectra and evaluated by the photocatalytic degradation of methylene blue and Rhodamine B. The results indicate that the doping level of nitrogen-doped TiO2 reaches 8.88% (atom fraction) using the P25 TiO2 as raw materials which exhibits obvious absorption in visible region. Its energy gap decreases to 1.75 eV together with the formation of srilankite high-pressure phase. The doping level is 3%-4% (atom fraction) corresponding to the small variation of the energy gap using the metatitanic acid as raw materials. The specific surface area of the sample increases dramatically due to the unique shock dehydration-expansion mechanism. The nitrogen-doped TiO2 have better adsorption capability and photocatalytic activity under visible irradiation for the degradation of methylene blue and Rhodamine B, among which treated at higher impact velocity shows the higher photocatalytic activity.
1
0
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
