資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://irlib.pccu.edu.tw/handle/987654321/48697
|
| 題名: | Origin of the enhanced photocatalytic activity of graphitic carbon nitride nanocomposites and the effects of water constituents |
| 作者: | Zhong, CR (Zhong, Chang-Ru)
Lee, TW (Lee, Ting-Wei)
Li, JA (Li, Jie-An)
Lai, YH (Lai, Yu-Heng)
Ha, TJ (Ha, Tae-Jun)
Chen, CY (Chen, Chiaying) |
| 貢獻者: | 化學系 |
| 關鍵詞: | Natural organic matter
Humic acid
Cyclooctasulfur
Band alignment
Tetracycline |
| 日期: | 2020-10-15 |
| 上傳時間: | 2020-10-22 14:21:20 (UTC+8) |
| 摘要: | A metal-free heterostructure system composed of graphitic carbon nitride (g-C3N4), reduced graphene oxide (rGO), and cyclooctasulfur (alpha-S) is developed as a facile route for establishing efficient photo catalysts. We aim to identify the governing factors that contributed to the photochemical performance of g-C3N4/rGO/alpha-S nanocomposites, which are important to advance potential applications but remain unexplored. The results indicate that the constituent ratio of each component in g-C3N4/rGO/alpha-S composites leads to varying surface microstructure, band alignment, and photochemical properties. The enhanced visible-light photocatalytic activity originates from an upward shift of the conduction bands toward higher energies, higher content of sp(2)-hybridized pyridine nitrogen in triazine rings (C=N-C), and a lower amount of hydrogen bonds. The established structural integration informs a guiding framework for the design of emerging g-C3N4-based nanocomposites. Additionally, the influence of humic acid (HA) on photocatalytic decontamination was studied and shows an overall detrimental effect on the photocatalytic activity of g-C3N4 nanocomposites. Although HA advanced the photoexcited electrons, and therefore the reactive oxygen species, as well as enhanced the adsorption of the pollutants onto g-C3N4, especially at lower pH, attenuation of oxygen transfer as a result of active site competition between oxygen and target pollutants was found. (C) 2020 Elsevier Ltd. All rights reserved. |
| 關聯: | CARBON 卷冊: 167 頁數: 852-862 |
| 顯示於類別: | [化學系所] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 185 | 檢視/開啟 |
|
在CCUR中所有的資料項目都受到原著作權保護.
|
