兰州大学机构库 >化学化工学院
New heterojunctions of CN/TiO2 with different band structure as highly efficient catalysts for artificial photosynthesis
Wang, Jinyuan1; Ma, Jiangping1; Zhang, QL(张巧兰)1; Chen, Yun1; Hong, Lin1; Wang, Bing1; Chen, Jiazang2; Jing, HW(景欢旺)1,2
2021-05-15
Source PublicationApplied Catalysis B: Environmental
ISSN09263373
Volume285
AbstractTo store solar energy into chemical energy and ameliorate over-emission of CO2 in modern society, the promising photoelectrocatalytic reduction of CO2 into multicarbon products (C2+) has inspired scientists to discover new efficient catalysts. Herein, a series of new heterojunctions of polypyrrole/TiO2 (PTCN-X, X is pyrolytic temperature) were prepared by a facile method of in-situ oxidizing polymerazation of pyrrole onto the surface of TiO2 and subsequently treating with temperature-controlled pyrolysis. An interesting phenomenon was discovered that the p-n heterojunction of PTCN gradually transferred to n-n heterojunction of PTCN-400. The optimal n-n heterojunctions of PTCN-400 have the highest selectivity of C2+ products (71.4 %) under iirridiation at −1.2 V. Further investigation reveals that the band structure of PTCN-X heterojunctions can be tuned by various pyrolytic temperature to form more defects and pyridine-N active sites, which enhances separation efficiency of photogenerated electron-holes and selectivity of C2+ products. © 2020 Elsevier B.V.
KeywordAromatic compounds Artificial photosynthesis Band structure Carbon dioxide Catalysts Oxide minerals Polypyrroles Solar energy Titanium dioxide Chemical energy Efficient catalysts N-n heterojunctions P-n heterojunctions Photoelectrocatalytic Photogenerated electrons Pyrolytic temperature Separation efficiency
PublisherElsevier B.V.
DOI10.1016/j.apcatb.2020.119781
Indexed ByEI
Language英语
EI Accession Number20205209671751
EI KeywordsHeterojunctions
EI Classification Number482.2 Minerals - 657.1 Solar Energy and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 933 Solid State Physics
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Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/443849
Collection化学化工学院
Corresponding AuthorJing, Huanwang
Affiliation1.State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou; 730000, China;
2.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan; 030001, China
First Author AffilicationCollege of Chemistry and Chemical Engineering
Corresponding Author AffilicationCollege of Chemistry and Chemical Engineering
Recommended Citation
GB/T 7714
Wang, Jinyuan,Ma, Jiangping,Zhang, Qiaolan,et al. New heterojunctions of CN/TiO2 with different band structure as highly efficient catalysts for artificial photosynthesis[J]. Applied Catalysis B: Environmental,2021,285.
APA Wang, Jinyuan.,Ma, Jiangping.,Zhang, Qiaolan.,Chen, Yun.,Hong, Lin.,...&Jing, Huanwang.(2021).New heterojunctions of CN/TiO2 with different band structure as highly efficient catalysts for artificial photosynthesis.Applied Catalysis B: Environmental,285.
MLA Wang, Jinyuan,et al."New heterojunctions of CN/TiO2 with different band structure as highly efficient catalysts for artificial photosynthesis".Applied Catalysis B: Environmental 285(2021).
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