Photocatalytic Reduction of CO2 Using Titanium-Substituted and   Fluorine-Doped Titanium-Substituted Hydroxyapatite as Photocatalysts

doi:10.1007/s10562-017-2175-5

CORC > 北京大学 > 环境科学与工程学院

	Photocatalytic Reduction of CO2 Using Titanium-Substituted and Fluorine-Doped Titanium-Substituted Hydroxyapatite as Photocatalysts
	Wang, Xuejiao ; Feng, Xiang ; Shang, Jing ; Jin, Ying ; Zhang, Caixia
刊名	CATALYSIS LETTERS
	2017
关键词	Carbon dioxide Photocatalytic reduction Ti-substituted hydroxyapatite Fluorine doping Relative humidity CARBON-DIOXIDE METAL-IONS TIO2 PHOTOREDUCTION FUELS ZINC
DOI	10.1007/s10562-017-2175-5
英文摘要	Reduction of carbon dioxide (CO2) using semiconductor photocatalysts has aroused a great deal of attention, and most studies have applied titanium dioxide (TiO2) and modified TiO2 as photocatalysts in this process. In this study, we used Ti-substituted hydroxyapatite (TiHAP), an emerging photocatalytic material with a high adsorption capacity, as a novel photocatalyst to investigate the photocatalytic reduction of gaseous CO2 under ultraviolet (UV) light with water as the reductant. Powders of TiHAP and fluorine-doped TiHAP (TiFHAP) were prepared using a hydrothermal method, and their morphologies, structure, and composition were characterized via transmission electron microscopy, X-ray diffraction, UV-Vis spectrophotometry, photoluminescence fluorescent spectrometry, and X-ray photoelectron spectroscopy. Compared to commercial P25-TiO2, TiHAP provided enhanced photocatalytic reduction of CO2 into carbon monoxide (CO) and methane (CH4), due to its higher conduction band position. Fluorine doping further facilitated the reaction activity of TiFHAP, with 5.6 wt% fluorine providing the optimal results. The relative humidity of the reaction system had a substantial effect on the CO2 reduction process. Higher relative humidity ensured greater participation of protons, which was confirmed by the increasing formation rates of CO and CH4. Furthermore, a high CO formation rate always accompanied high CH4 formation selectivity, indicating that deep CO2 reduction can proceed rapidly over TiFHAP samples. This study supports the idea that TiHAP may be a novel and efficient photocatalyst for the reduction of CO2.; National Natural Science Foundation of China [21577003, 21277004, 41421064]; National Key Research and Development Program of China [2016YFC0202200]; Beijing Natural Science Foundation [8132035]; Special Funds for State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, China; SCI(E); ARTICLE; 11; 2706-2713; 147
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470398]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wang, Xuejiao,Feng, Xiang,Shang, Jing,et al. Photocatalytic Reduction of CO2 Using Titanium-Substituted and Fluorine-Doped Titanium-Substituted Hydroxyapatite as Photocatalysts[J]. CATALYSIS LETTERS,2017.
APA	Wang, Xuejiao,Feng, Xiang,Shang, Jing,Jin, Ying,&Zhang, Caixia.(2017).Photocatalytic Reduction of CO2 Using Titanium-Substituted and Fluorine-Doped Titanium-Substituted Hydroxyapatite as Photocatalysts.CATALYSIS LETTERS.
MLA	Wang, Xuejiao,et al."Photocatalytic Reduction of CO2 Using Titanium-Substituted and Fluorine-Doped Titanium-Substituted Hydroxyapatite as Photocatalysts".CATALYSIS LETTERS (2017).