Surface hydrogen bonds assisted meso-porous WO3 photocatalysts for high selective oxidation of benzylalcohol to benzylaldehyde
Su, Y; Han, ZK; Zhang, L; Wang, WZ; Duan, MY; Li, XM; Zheng, YL; Wang, YG; Lei, XL
2017
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
卷号217期号:-页码:108-114
文章类型期刊论文
摘要Selective photo:oxidation of alcohols displays high potential in solar energy conversion and reducing environmental pollution, yet its selectivity and conversion in aqueous phase is still far from expectation. Here we report a fluorinated meso-porous WO3 photocatalyst (Fm-WO3) exhibits significant selectivity (similar to 99%) and conversion (similar to 57%) in transforming benzylalcohol to benzaldehyde in the aqueous solution under the simulated sunlight irradiation. This high reactivity is attributed to the synergistic effect between meso-porous nanostructure and surface fluorination, where meso-porous structure supplies, active sites to promote the multi electron reduction of O-2 and the surface fluorination assists the transmission of photogenerated holes. First principles calculations further suggest that surface fluorination brings in an unoccupied impurity state in the band structure of WO3, which exhibits a strong correlation with the hydroxyl group of benzyalcohol and thus bridges the interaction between surfaces and alcohols. Meanwhile, the fluorination promotes the generation of (OH)-O-center dot by holes which can be considered as another way to oxidize benzyalcohol. Finally, a generalized reaction mechanism for selective photo-oxidation has been proposed. (C) 2017 Elsevier B.V. All rights reserved.
关键词Visible-light Irradiation Benzyl Alcohol Catalytic-activity Water Oxidation Benzaldehyde Methanol Oxide Tio2 Photooxidation Glutaraldehyde
DOI10.1016/j.apcatb.2017.05.075
关键词[WOS]VISIBLE-LIGHT IRRADIATION ; BENZYL ALCOHOL ; CATALYTIC-ACTIVITY ; WATER OXIDATION ; BENZALDEHYDE ; METHANOL ; OXIDE ; TIO2 ; PHOTOOXIDATION ; GLUTARALDEHYDE
收录类别SCI
语种英语
WOS记录号WOS:000405158000012
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28839
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Su, Y,Han, ZK,Zhang, L,et al. Surface hydrogen bonds assisted meso-porous WO3 photocatalysts for high selective oxidation of benzylalcohol to benzylaldehyde[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,217(-):108-114.
APA Su, Y.,Han, ZK.,Zhang, L.,Wang, WZ.,Duan, MY.,...&Lei, XL.(2017).Surface hydrogen bonds assisted meso-porous WO3 photocatalysts for high selective oxidation of benzylalcohol to benzylaldehyde.APPLIED CATALYSIS B-ENVIRONMENTAL,217(-),108-114.
MLA Su, Y,et al."Surface hydrogen bonds assisted meso-porous WO3 photocatalysts for high selective oxidation of benzylalcohol to benzylaldehyde".APPLIED CATALYSIS B-ENVIRONMENTAL 217.-(2017):108-114.
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