{"title":"外磁场对金属掺杂二氧化钛光催化性能影响的密度泛函理论研究","authors":"Pengsheng Liu, Xiaoan Mao","doi":"10.1002/adts.202501174","DOIUrl":null,"url":null,"abstract":"Home‐made pure TiO<jats:sub>2</jats:sub>, Fe/TiO<jats:sub>2</jats:sub>, Co/TiO<jats:sub>2</jats:sub>, Cr/TiO<jats:sub>2</jats:sub>, Cu/TiO<jats:sub>2</jats:sub> and Mn/TiO<jats:sub>2</jats:sub> were tested for methylene blue degradation under UV light with a 0.1 T magnetic field (MF). Fe/TiO<jats:sub>2</jats:sub> showed the greatest improvement, with moderate effects for pure, Cu‐ and Mn‐doped samples, while Co‐ and Cr‐doping reduced degradation. Mechanisms were explored using DFT+U (PBE functional, VASP code) computation. DOS patterns indicates noticeable spin polarization as transition metals are doped into lattice and various degrees of bandgap decrease and the introduction of new bands within the bandgap region. The charge density patterns indicated that the doped transition metals can form new recombination centers to inhibit the electron and hole recombination. Optical properties simulations estimated photocatalytic performance through dielectric function, Cu/TiO<jats:sub>2</jats:sub> stands out with the highest dielectric constant, suggesting its superior potential for light absorption. According to the spin density results, Cu/TiO<jats:sub>2</jats:sub>, Fe/TiO<jats:sub>2</jats:sub>, and Mn/TiO<jats:sub>2</jats:sub> showed the highest potential of being affected by an external magnetic field, consistent with the experimental findings of enhanced photo degradation in the presence of an external MF. This research aims to elucidate the mechanisms of the external magnetic field effect on photocatalysis at the electron level.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"53 1","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Density Functional Theory Study on the Impact of External Magnetic Fields on the Photocatalytic Properties of Metal‐Doped Titanium Dioxide\",\"authors\":\"Pengsheng Liu, Xiaoan Mao\",\"doi\":\"10.1002/adts.202501174\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Home‐made pure TiO<jats:sub>2</jats:sub>, Fe/TiO<jats:sub>2</jats:sub>, Co/TiO<jats:sub>2</jats:sub>, Cr/TiO<jats:sub>2</jats:sub>, Cu/TiO<jats:sub>2</jats:sub> and Mn/TiO<jats:sub>2</jats:sub> were tested for methylene blue degradation under UV light with a 0.1 T magnetic field (MF). Fe/TiO<jats:sub>2</jats:sub> showed the greatest improvement, with moderate effects for pure, Cu‐ and Mn‐doped samples, while Co‐ and Cr‐doping reduced degradation. Mechanisms were explored using DFT+U (PBE functional, VASP code) computation. DOS patterns indicates noticeable spin polarization as transition metals are doped into lattice and various degrees of bandgap decrease and the introduction of new bands within the bandgap region. The charge density patterns indicated that the doped transition metals can form new recombination centers to inhibit the electron and hole recombination. Optical properties simulations estimated photocatalytic performance through dielectric function, Cu/TiO<jats:sub>2</jats:sub> stands out with the highest dielectric constant, suggesting its superior potential for light absorption. According to the spin density results, Cu/TiO<jats:sub>2</jats:sub>, Fe/TiO<jats:sub>2</jats:sub>, and Mn/TiO<jats:sub>2</jats:sub> showed the highest potential of being affected by an external magnetic field, consistent with the experimental findings of enhanced photo degradation in the presence of an external MF. This research aims to elucidate the mechanisms of the external magnetic field effect on photocatalysis at the electron level.\",\"PeriodicalId\":7219,\"journal\":{\"name\":\"Advanced Theory and Simulations\",\"volume\":\"53 1\",\"pages\":\"\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2025-08-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Theory and Simulations\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1002/adts.202501174\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Theory and Simulations","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/adts.202501174","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
Density Functional Theory Study on the Impact of External Magnetic Fields on the Photocatalytic Properties of Metal‐Doped Titanium Dioxide
Home‐made pure TiO2, Fe/TiO2, Co/TiO2, Cr/TiO2, Cu/TiO2 and Mn/TiO2 were tested for methylene blue degradation under UV light with a 0.1 T magnetic field (MF). Fe/TiO2 showed the greatest improvement, with moderate effects for pure, Cu‐ and Mn‐doped samples, while Co‐ and Cr‐doping reduced degradation. Mechanisms were explored using DFT+U (PBE functional, VASP code) computation. DOS patterns indicates noticeable spin polarization as transition metals are doped into lattice and various degrees of bandgap decrease and the introduction of new bands within the bandgap region. The charge density patterns indicated that the doped transition metals can form new recombination centers to inhibit the electron and hole recombination. Optical properties simulations estimated photocatalytic performance through dielectric function, Cu/TiO2 stands out with the highest dielectric constant, suggesting its superior potential for light absorption. According to the spin density results, Cu/TiO2, Fe/TiO2, and Mn/TiO2 showed the highest potential of being affected by an external magnetic field, consistent with the experimental findings of enhanced photo degradation in the presence of an external MF. This research aims to elucidate the mechanisms of the external magnetic field effect on photocatalysis at the electron level.
期刊介绍:
Advanced Theory and Simulations is an interdisciplinary, international, English-language journal that publishes high-quality scientific results focusing on the development and application of theoretical methods, modeling and simulation approaches in all natural science and medicine areas, including:
materials, chemistry, condensed matter physics
engineering, energy
life science, biology, medicine
atmospheric/environmental science, climate science
planetary science, astronomy, cosmology
method development, numerical methods, statistics