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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
DOI10.1039/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
被引频次:49[WOS]   [WOS记录]     [WOS相关记录]
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
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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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