High-performance of Cu-TiO2 for photocatalytic oxidation of formaldehyde under visible light and the mechanism study
文献类型：期刊论文
| 作者 | Chen, Min; Wang, Honghong; Chen, Xueyan; Wang, Fei ; Qin, Xiaoxiao; Zhang, Changbin; He, Hong
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2020-06-15 |
| 卷号 | 390页码:1-8 |
| 关键词 | Photocatalysis Cu-TiO2 Formaldehyde Visible-light |
| ISSN号 | 1385-8947 |
| 英文摘要 | Photocatalysis is regarded as a promising method for indoor formaldehyde (HCHO) removal, and there remains a strong demand for the development of highly efficient photocatalysts for HCHO oxidation under visible light. Herein, by grafting nano CuOx clusters onto TiO2, the higher performance is achieved over Cu-TiO2 for the photocatalytic oxidation of HCHO under visible light compared with the typical photocatalysts N-TiO2 and g-C3N4. It is found that the presence of water greatly promotes the activity of HCHO oxidation on Cu-TiO2. The characterization results indicate that the CuOx clusters on TiO2 exhibit high redox reversibility between Cu (II) and Cu (I) and greatly facilitate the migration of electrons. The mechanism of photocatalytic oxidation of HCHO was explored by using in situ DRIFTS measurements and DFT calculations. It is shown that HCHO is firstly oxidized to dioxymethylene (DOM), and then DOM is transformed into formate species under visible light irradiation. DFT calculations results indicate that the (OH)-O-center dot species are responsible for surface formate decomposition, which is the rate-determining step, while O-center dot(2)- radical is not active in formate decomposition. Our findings improve the understanding on the photocatalytic oxidation of HCHO, and the Cu-TiO2 catalyst is a promising candidate for practical application in indoor air purification. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45078]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Chen, Min,Wang, Honghong,Chen, Xueyan,et al. High-performance of Cu-TiO2 for photocatalytic oxidation of formaldehyde under visible light and the mechanism study[J]. CHEMICAL ENGINEERING JOURNAL,2020,390:1-8. |
| APA | Chen, Min.,Wang, Honghong.,Chen, Xueyan.,Wang, Fei.,Qin, Xiaoxiao.,...&He, Hong.(2020).High-performance of Cu-TiO2 for photocatalytic oxidation of formaldehyde under visible light and the mechanism study.CHEMICAL ENGINEERING JOURNAL,390,1-8. |
| MLA | Chen, Min,et al."High-performance of Cu-TiO2 for photocatalytic oxidation of formaldehyde under visible light and the mechanism study".CHEMICAL ENGINEERING JOURNAL 390(2020):1-8. |
入库方式： OAI收割
来源：生态环境研究中心
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