Visible-Light Upconversion Carbon Quantum Dots Decorated TiO2 for the Photodegradation of Flowing Gaseous Acetaldehyde
文献类型：期刊论文
| 作者 | Hu, Yidan1; Xie, Xiaofeng; Wang, Xiao; Wang, Yan; Zeng, Yi; Pui, David Y. H.; Sun, Jing |
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2018 |
| 卷号 | 440页码:266 |
| 关键词 | Carbon quantum dots Titania Upconversion Photocatalysis Acetaldehyde removal |
| ISSN号 | 0169-4332 |
| DOI | 10.1016/j.apsusc.2018.01.104 |
| 英文摘要 | Carbon-modified photocatalyst has attracted extensive attentions in the field of gaseous pollutant removal, mainly due to the improved adsorption properties and electronic transport of carbon matrix, such as carbon nanotubes, graphene, and fullerene, etc. In this work, carbon quantum dots (CQDs) were employed to enhance the photocatalytic performance of TiO2-based composites for flowing gaseous acetaldehyde removal. Besides the aforementioned advantages of carbon materials, the unique upconverted photoluminescence property of CQDs is capable of extending the optical absorption to visible-light range. Moreover, the electron spin resonance (ESR) results firstly verified a stable existence of Ti3+ defect in the CQDs/TiO2 composite, which is possibly induced by the electron migration from CQDs to TiO2. And the formed Ti3+ donor energy level in the band gap could further help with the visible-light harvesting. During the photodegradation experiments, with two-hour continuous flowing gaseous acetaldehyde injection (500 ppm, 20 sccm), the CQDs/TiO2 composite remained 99% removal efficiency under fluorescent lamp irradiation (lambda > 380 nm). The optimized CQDs content was obtained as 3 wt%, and the underlying mechanism was further analyzed by temperature programmed desorption (TPD) methods. This work will push forward the air purification researches by providing new insights of CQDs sensitized photocatalyst. (C) 2018 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
| WOS记录号 | WOS:000427461000034 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | This work was financially supported by the National Key Research and Development Program of China (2016YFA0203000), the International Partnership Program of Chinese Academy of Sciences (GJHZ1656), and the National Natural Science Foundation of China (No. 51702347). ; This work was financially supported by the National Key Research and Development Program of China (2016YFA0203000), the International Partnership Program of Chinese Academy of Sciences (GJHZ1656), and the National Natural Science Foundation of China (No. 51702347). |
| 源URL | [http://ir.sic.ac.cn/handle/331005/24919]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Pui, David Y. H.] Univ Minnesota, Coll Sci & Engn, Minneapolis, MN 55455 USA |
| 推荐引用方式 GB/T 7714 | Hu, Yidan,Xie, Xiaofeng,Wang, Xiao,et al. Visible-Light Upconversion Carbon Quantum Dots Decorated TiO2 for the Photodegradation of Flowing Gaseous Acetaldehyde[J]. APPLIED SURFACE SCIENCE,2018,440:266, 274. |
| APA | Hu, Yidan.,Xie, Xiaofeng.,Wang, Xiao.,Wang, Yan.,Zeng, Yi.,...&Sun, Jing.(2018).Visible-Light Upconversion Carbon Quantum Dots Decorated TiO2 for the Photodegradation of Flowing Gaseous Acetaldehyde.APPLIED SURFACE SCIENCE,440,266. |
| MLA | Hu, Yidan,et al."Visible-Light Upconversion Carbon Quantum Dots Decorated TiO2 for the Photodegradation of Flowing Gaseous Acetaldehyde".APPLIED SURFACE SCIENCE 440(2018):266. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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