| Internal magnetic-field-enhanced photogenerated charge separation in ferromagnetic TiO2 surface heterojunctions | |
| Wang, Guojing1,2; Xiong, Shirong1; Chen, Yonghui1; Wang, Chunchang3; Lv, Shasha4; Jia, Ke2; Xiang, Yunjie5; Liu, Jianbo2; Liu, Chong1; Li, Zhengcao2 | |
| 2023-10-10 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY Impact Factor & Quartile |
| ISSN | 1005-0302 |
| Volume | 160Pages:240-247 |
| page numbers | 8 |
| Abstract | The use of the internal magnetic field of ferromagnets can effectively promote charge separation and transfer (CST) in photoelectrochemical energy conversion. However, photoelectrochemical materials with a ferromagnetic field are scarce, and the internal magnetic field is negligible in nonferromagnetic materials. To address this issue, we propose a rational method for preparing ferromagnetic TiO2 powder using controllable oxygen vacancies in anatase TiO2 with co-exposed {001} and {101} facets. Accordingly, an excellent saturation magnetisation of 0.0014 emu/g in TiO2 is achieved owing to an asymmetric and uneven charge distribution. Compared with that of nonferromagnetic TiO2, the efficiency of photocatalytic hydrogen generation of ferromagnetic TiO2 is improved by 0.64 times. The enhancement of photocatalytic hydrogen generation is due to the different forces exerted on the electrons and holes in the magnetic field, which significantly improve the photogenerated CST efficiency of ferromagnetic TiO2. This result highlights the significant role of the synergistic regulation of the crystal structure and defects in regulating the ferromagnetic characteristics of materials. The findings of this study provide guidance for leveraging point defects to promote CST for high-efficiency solar-energy conversion systems. © 2023 |
| Keyword | Electrochemistry Energy conversion efficiency Ferromagnetic materials Ferromagnetism Heterojunctions Hydrogen production Magnetic fields Oxygen vacancies Point defects Solar energy Solar energy conversion Solar power generation Charge-separation Ferromagnetics Ferromagnets Hydrogen generations Internal magnetic fields Non-ferromagnetic Photocatalytic hydrogen Photoelectrochemicals Photogenerated charge TiO2 {001}-{101} surface heterojunction |
| Publisher | Chinese Society of Metals |
| DOI | 10.1016/j.jmst.2023.02.053 |
| Indexed By | EI ; SCIE |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:001004979100001 |
| EI Accession Number | 20232014087702 |
| EI Keywords | Titanium dioxide |
| EI Classification Number | 522 Gas Fuels ; 525.2 Energy Conservation ; 525.5 Energy Conversion Issues ; 615.2 Solar Power ; 657.1 Solar Energy and Phenomena ; 701.2 Magnetism: Basic Concepts and Phenomena ; 708.4 Magnetic Materials ; 714.2 Semiconductor Devices and Integrated Circuits ; 801.4.1 Electrochemistry ; 804.2 Inorganic Compounds ; 933.1 Crystalline Solids ; 933.1.1 Crystal Lattice |
| Original Document Type | Journal article (JA) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/529207 |
| Collection | 兰州大学 |
| Corresponding Author | Wang, Guojing; Liu, Chong; Li, Zhengcao |
| Affiliation | 1.School of Materials and Energy, Lanzhou University, Lanzhou; 730000, China; 2.State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing; 100084, China; 3.Laboratory of Dielectric Functional Materials, School of Physics and Material Science, Anhui University, Hefei; 230601, China; 4.Key Laboratory of Beam Technology, Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing; 100875, China; 5.School of Materials and Energy, Southwest University, Chongqing; 404100, China |
| First Author Affilication | Lanzhou University |
| Corresponding Author Affilication | Lanzhou University |
| Recommended Citation GB/T 7714 | Wang, Guojing,Xiong, Shirong,Chen, Yonghui,et al. Internal magnetic-field-enhanced photogenerated charge separation in ferromagnetic TiO2 surface heterojunctions[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,160:240-247. |
| APA | Wang, Guojing.,Xiong, Shirong.,Chen, Yonghui.,Wang, Chunchang.,Lv, Shasha.,...&Li, Zhengcao.(2023).Internal magnetic-field-enhanced photogenerated charge separation in ferromagnetic TiO2 surface heterojunctions.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,160,240-247. |
| MLA | Wang, Guojing,et al."Internal magnetic-field-enhanced photogenerated charge separation in ferromagnetic TiO2 surface heterojunctions".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 160(2023):240-247. |
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