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Cu2O/SrTi1-xCrxO3 Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation

文献类型：期刊论文

作者Li, Zhonghua1,2; Zhang, Xuefan2; Chen, Ping2; Shen, Zihan3; Wang, Rui3; He, Qiya1,3; Zhang, Shuo2; Chang, Shaozhong2; Tian, Jiaming2; Zhang, Huigang1,2,3
刊名LANGMUIR
出版日期2022-11-03
页码8
ISSN号0743-7463
DOI10.1021/acs.langmuir.2c02007
英文摘要A heterojunction of Cu2O and Cr-doped SrTiO3 (SrTi1-xCrxO3) was designed for selective photocatalytic isopropanol (IPA) oxidation under visible light irradiation. The photocatalytic oxidation of IPA was measured in a fixed-bed reactor. Cr dopants can increase the light absorption and improve the activity of the catalyst. The formation of the Cu2O/SrTi1-xCrxO3 heterojunction can further broaden the absorption range of lights and dramatically increase the photocatalytic activity for selective oxidation of IPA. The 3% Cu2O/SrTi0.99Cr0.01O3 catalyst can fully convert similar to 1000 ppm IPA under illumination in 2 h. The selectivity of acetone is similar to 100%. The yield is 83 and 4 times higher than that using SrTiO3 and SrTi0.99Cr0.01O3 as catalysts, respectively. By measuring the ultraviolet-visible absorption spectra and Mott-Schottky plots, we obtained the band structure of the heterojunction, which shows that the conduction and valence bands of Cu2O are higher than those of SrTi1-xCrxO3, therefore facilitating the separation and transfer of photogenerated electrons and holes. In addition, electron paramagnetic resonance spectroscopy and radical trapping tests reveal that the generation of hydroxyl and superoxide leads to photocatalytic oxidation of IPA by the heterojunction photo catalyst.
WOS关键词CR-DOPED SRTIO3 ; HYDROTHERMAL SYNTHESIS ; HYDROGEN-PRODUCTION ; OXIDATION ; PERFORMANCE ; COMPOSITES ; 2-PROPANOL ; REDUCTION ; CU2O ; PHOTOOXIDATION
资助项目National Key R&D Program of China[2020YFA0406104] ; National Natural Science Foundation of China[22075131] ; State Key Laboratory of Multiphase Complex Systems[MPCS-2021-A]
WOS研究方向Chemistry ; Materials Science
语种英语
WOS记录号WOS:000880893000001
出版者AMER CHEMICAL SOC
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; State Key Laboratory of Multiphase Complex Systems
源URL[http://ir.ipe.ac.cn/handle/122111/55573]  
专题中国科学院过程工程研究所
通讯作者Zhang, Huigang
作者单位1.Northwest Univ, Dept Chem Engn, Xian 710069, Peoples R China
2.Nanjing Univ, Coll Engn & Appl Sci, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Li, Zhonghua,Zhang, Xuefan,Chen, Ping,et al. Cu2O/SrTi1-xCrxO3 Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation[J]. LANGMUIR,2022:8.
APA Li, Zhonghua.,Zhang, Xuefan.,Chen, Ping.,Shen, Zihan.,Wang, Rui.,...&Zhang, Huigang.(2022).Cu2O/SrTi1-xCrxO3 Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation.LANGMUIR,8.
MLA Li, Zhonghua,et al."Cu2O/SrTi1-xCrxO3 Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation".LANGMUIR (2022):8.

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来源：过程工程研究所

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