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CuO/TiO2 heterojunction composites: an efficient photocatalyst for selective oxidation of methanol to methyl formate

文献类型：期刊论文

作者Li, Gao2; Shi, Quanquan1,2; Ping, Guicheng1; Wang, Xiaojia1; Xu, Hui1; Li, Jingmei1; Cui, Jiaqi1; Abroshan, Hadi3,4,5; Ding, Hongjing1
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2019-02-07
卷号7期号:5页码:2253-2260
ISSN号2050-7488
DOI10.1039/c8ta09439j
通讯作者Xu, Hui(yqfxxuhui@163.com) ; Abroshan, Hadi(hadi.abroshan@chemistry.gatech.edu) ; Li, Gao(gaoli@dicp.ac.cn)
英文摘要This study demonstrates the synthesis of an efficient photocatalyst, CuO/TiO2 heterojunction, for selective aerobic photo-oxidation of methanol to methyl formate. The CuO nanoparticles (size: 3.5 +/- 1.0 nm) are particularly deposited at the {101} facet of anatase TiO2 nanosheets to minimize recombination of photo-generated electrons/holes. The photocatalysts are characterized by different methods, including powder X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy, and hydrogen temperature-programmed reduction (H-2-TPR). The heterojunction catalysts exhibit an excellent photocatalytic performance under mild conditions (i.e., 25-45 degrees C and gas reactions under UV irradiation with a wavelength of 365 nm) for the selective photo-oxidation of methanol using 0.5 vol% oxygen (O-2) as an oxidizing agent. The 5 wt% CuO/TiO2 photocatalyst exhibits a decent 95% methanol conversion with over 85% selectivity towards the formation of methyl formate. The by-product of the reaction is found to be merely CO2, which can be readily eliminated from the product. The formation rate for the methyl formate is 10.8 mmol g(-1) h(-1) at 25 degrees C, which is considerably higher than that for the corresponding CuO and TiO2 nanosheets as well as for conventional catalysts. The superior catalytic activity of the CuO/TiO2 is associated with its unique electronic structure and the synergistic effects at the interface of the photocatalysts' components. The results of this study offer guidelines for design of a new synthetic strategy for preparation of efficient photocatalysts for selective oxidation of methanol to methyl formate and related reactions.
WOS关键词ANATASE TIO2 ; GAS-PHASE ; NANOPARTICLES ; CATALYSTS ; H-2 ; PERFORMANCE ; NANOFIBERS ; GENERATION ; REDUCTION ; TITANIA
资助项目National Natural Science Foundation of China[21665020] ; Natural Science Foundation of Inner Mongolia Autonomous Region[2018BS02004] ; Program of Higher-level Talents of Inner Mongolia Agricultural University[NDYB2016-03]
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:000457546000032
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Natural Science Foundation of Inner Mongolia Autonomous Region ; Program of Higher-level Talents of Inner Mongolia Agricultural University ; Program of Higher-level Talents of Inner Mongolia Agricultural University
源URL[http://cas-ir.dicp.ac.cn/handle/321008/166072]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Li, Gao; Xu, Hui; Abroshan, Hadi
作者单位1.Inner Mongolia Agr Univ, Coll Sci, Hohhot 010018, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Stanford Univ, Dept Chem Engn, SUNCAT Ctr Interface Sci & Catalysis, Stanford, CA 94305 USA
4.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
5.Georgia Inst Technol, Atlanta, GA 30332 USA
推荐引用方式
GB/T 7714		 Li, Gao,Shi, Quanquan,Ping, Guicheng,et al. CuO/TiO2 heterojunction composites: an efficient photocatalyst for selective oxidation of methanol to methyl formate[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(5):2253-2260.
APA Li, Gao.,Shi, Quanquan.,Ping, Guicheng.,Wang, Xiaojia.,Xu, Hui.,...&Ding, Hongjing.(2019).CuO/TiO2 heterojunction composites: an efficient photocatalyst for selective oxidation of methanol to methyl formate.JOURNAL OF MATERIALS CHEMISTRY A,7(5),2253-2260.
MLA Li, Gao,et al."CuO/TiO2 heterojunction composites: an efficient photocatalyst for selective oxidation of methanol to methyl formate".JOURNAL OF MATERIALS CHEMISTRY A 7.5(2019):2253-2260.

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来源：大连化学物理研究所

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