Impact of doped metals on urea-derived g-C3N4 for photocatalytic degradation of antibiotics: Structure, photoactivity and degradation mechanisms
文献类型：期刊论文
| 作者 | Yan, Wei; Yan, Li; Jing, Chuanyong |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2019-05-05 |
| 卷号 | 244页码:475-485 |
| 关键词 | g-C3N4 Visible light photocatalysis Metal doping Photocatalytic degradation of antibiotics |
| ISSN号 | 0926-3373 |
| 英文摘要 | Metal doping is an appealing modification strategy of graphitic carbon nitride (g-C3N4) to improve its photo-catalytic activity. The interactions of g-C3N4 precursors with metals, however, has often been underappreciated, which can induce great impacts on g-C3N4 formation and properties. Herein, the impacts of metals (Na, K, Ca, Mg) on the morphology, structure, and photoactivity of urea-derived g-C3N4 were investigated. Our TEM and XPS results confirmed that the interactions of doped metals with urea precursors lead to the incorporation of O atoms from urea molecules into the framework of g-C3N4. Due to the synergistic effects of the metals and structural O atoms, doped g-C3N4 performed an elevated photodegradation of antibiotics under the visible light irradiation, which was attributed to the enhanced light-harvesting and reduced charge recombination. In addition, the doped metals presented uneven regulation on the band structures and morphology of g-C3N4. As a result, both superoxide and hydroxyl radicals were generated by g-CN-Na and g-CN-K, whereas, only superoxide radicals were involved in g-CN, g-CN-Ca and g-CN-Mg. Consequently, diversified photodegradation mechanisms for enrofloxacin (ENR) were observed that the g-CN, g-CN-Ca and g-CN-Mg reaction systems mainly attacked the piperazine moiety of ENR while g-CN-Na and g-CN-K provided additional photodegradation pathway by attacking quinolone core of ENR. The present work could provide new insights into further understanding of doping chemistry with g-C3N4. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42962]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Wei,Yan, Li,Jing, Chuanyong. Impact of doped metals on urea-derived g-C3N4 for photocatalytic degradation of antibiotics: Structure, photoactivity and degradation mechanisms[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,244:475-485. |
| APA | Yan, Wei,Yan, Li,&Jing, Chuanyong.(2019).Impact of doped metals on urea-derived g-C3N4 for photocatalytic degradation of antibiotics: Structure, photoactivity and degradation mechanisms.APPLIED CATALYSIS B-ENVIRONMENTAL,244,475-485. |
| MLA | Yan, Wei,et al."Impact of doped metals on urea-derived g-C3N4 for photocatalytic degradation of antibiotics: Structure, photoactivity and degradation mechanisms".APPLIED CATALYSIS B-ENVIRONMENTAL 244(2019):475-485. |
入库方式： OAI收割
来源：生态环境研究中心
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