Enhanced photocatalytic removal of NO over titania/hydroxyapatite (TiO2/HAp) composites with improved adsorption and charge mobility ability | |
Yao, Jie1,2; Zhang, Yufei2; Wang, Yawen1; Chen, Meijuan3; Huang, Yu2; Cao, Junji2; Ho, Wingkei4; Lee, Shun Cheng5 | |
2017 | |
发表期刊 | RSC ADVANCES |
卷号 | 7期号:40页码:24683-24689 |
文章类型 | Article |
摘要 | Effective photocatalysis processes with production of fewer toxic intermediates are highly desirable for air purification. In this study, titania/hydroxyapatite (TiO2/HAp) composites were synthesized by a facile hydrothermal method and employed to decontaminate nitric oxide (NO) in air under simulated solar light irradiation for the first time. It was found that the photocatalytic activity of the as-prepared TiO2/HAp composite (44.61%) was superior to those of the pristine components (TiO2: 38.57%, HAp: 36.73%) and mechanically mixed samples (35.36%). The TiO2/HAp composite with mass ratio of 3 : 1 (75% TiO2/HAp) exhibited the highest NO removal efficiency among them. Moreover, the toxic intermediate NO2 production was significantly inhibited over TiO2/HAp. These synergistically improved properties can be ascribed to the high separation efficiency and faster transfer of the photo-generated charge carriers as evidenced by the experimental results from photocurrent tests and electrochemical impedance spectroscopy (EIS). The results from temperature programmed desorption (TPD) confirmed that the 75% TiO2/HAp sample had stronger chemisorption for NO due to the increased concentration of surface OH groups. Furthermore, the electron spin resonance (ESR) characterization suggested that O-center dot(2)- and (OH)-O-center dot radicals were the major species involved for NO removal over TiO2/HAp composites. The five recycling tests suggested that the TiO2/HAp has superior photocatalytic stability. This study suggests that the combination of TiO2 with HAp is an effective approach for air purification. |
WOS标题词 | Science & Technology ; Physical Sciences |
DOI | 10.1039/c7ra02157g |
关键词[WOS] | LIGHT IRRADIATION ; RHODAMINE-B ; HYDROXYAPATITE ; DEGRADATION ; PERFORMANCE ; HETEROSTRUCTURE ; HETEROJUNCTIONS ; NANOCOMPOSITES ; DECOMPOSITION ; FABRICATION |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Chemistry |
WOS类目 | Chemistry, Multidisciplinary |
WOS记录号 | WOS:000401525700017 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/5469 |
专题 | 粉尘与环境研究室 |
作者单位 | 1.Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem Phys, Xian 710061, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China 4.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Yao, Jie,Zhang, Yufei,Wang, Yawen,et al. Enhanced photocatalytic removal of NO over titania/hydroxyapatite (TiO2/HAp) composites with improved adsorption and charge mobility ability[J]. RSC ADVANCES,2017,7(40):24683-24689. |
APA | Yao, Jie.,Zhang, Yufei.,Wang, Yawen.,Chen, Meijuan.,Huang, Yu.,...&Lee, Shun Cheng.(2017).Enhanced photocatalytic removal of NO over titania/hydroxyapatite (TiO2/HAp) composites with improved adsorption and charge mobility ability.RSC ADVANCES,7(40),24683-24689. |
MLA | Yao, Jie,et al."Enhanced photocatalytic removal of NO over titania/hydroxyapatite (TiO2/HAp) composites with improved adsorption and charge mobility ability".RSC ADVANCES 7.40(2017):24683-24689. |
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