Yogita Verma, Puneet Negi, Ruhit Jyoti Konwar, Hemaunt Kumar, Gagandeep Kaur, Priyanka Rani, Shailja, Anchal Sharma, Gursimran Kaur, Apexa Maru, Himanshu Dadhich, Keval Gadani, N. A. Shah, P. S. Solanki
{"title":"铜和钴离子共掺杂对纳米锐钛矿型二氧化钛结构、光学和介电性能的影响","authors":"Yogita Verma, Puneet Negi, Ruhit Jyoti Konwar, Hemaunt Kumar, Gagandeep Kaur, Priyanka Rani, Shailja, Anchal Sharma, Gursimran Kaur, Apexa Maru, Himanshu Dadhich, Keval Gadani, N. A. Shah, P. S. Solanki","doi":"10.1007/s10971-025-06888-1","DOIUrl":null,"url":null,"abstract":"<div><p>The pristine anatase titanium dioxide (TiO<sub>2</sub>) and transition metal (i.e. Cu and Co) co–doped anatase titanium dioxide nanoparticles (Ti<sub>0.988</sub>Cu<sub>0.002</sub>Co<sub>0.01</sub>O<sub>2</sub>) were synthesized using sol–gel auto–combustion technique. Structural, optical and dielectric properties have been studied to understand the effect of dopants across TiO<sub>2</sub> lattice. X–ray diffraction (XRD) and Rietveld refinements confirm the formation of tetragonal structure having <i>I4</i><sub><i>1</i></sub><i>/amd</i> space group, and crystallite size for co–doped TiO<sub>2</sub> nanoparticles falls ~12.68 nm which has been further verified by Raman spectroscopy. UV visible spectroscopy was performed to estimate the band gap energy that gets reduced from ~3.2 eV for TiO<sub>2</sub> to ~1.7 eV for co–doped TiO<sub>2</sub> nanoparticles. Dielectric constant, dielectric loss and ac conductivity for co–doped TiO<sub>2</sub> sample are explained in terms of crystallite size, related grain boundaries and their nature.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 3","pages":"1812 - 1826"},"PeriodicalIF":3.2000,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of copper and cobalt ions co–doping on structural, optical and dielectric properties of nanostructured anatase titanium dioxide\",\"authors\":\"Yogita Verma, Puneet Negi, Ruhit Jyoti Konwar, Hemaunt Kumar, Gagandeep Kaur, Priyanka Rani, Shailja, Anchal Sharma, Gursimran Kaur, Apexa Maru, Himanshu Dadhich, Keval Gadani, N. A. Shah, P. S. Solanki\",\"doi\":\"10.1007/s10971-025-06888-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The pristine anatase titanium dioxide (TiO<sub>2</sub>) and transition metal (i.e. Cu and Co) co–doped anatase titanium dioxide nanoparticles (Ti<sub>0.988</sub>Cu<sub>0.002</sub>Co<sub>0.01</sub>O<sub>2</sub>) were synthesized using sol–gel auto–combustion technique. Structural, optical and dielectric properties have been studied to understand the effect of dopants across TiO<sub>2</sub> lattice. X–ray diffraction (XRD) and Rietveld refinements confirm the formation of tetragonal structure having <i>I4</i><sub><i>1</i></sub><i>/amd</i> space group, and crystallite size for co–doped TiO<sub>2</sub> nanoparticles falls ~12.68 nm which has been further verified by Raman spectroscopy. UV visible spectroscopy was performed to estimate the band gap energy that gets reduced from ~3.2 eV for TiO<sub>2</sub> to ~1.7 eV for co–doped TiO<sub>2</sub> nanoparticles. Dielectric constant, dielectric loss and ac conductivity for co–doped TiO<sub>2</sub> sample are explained in terms of crystallite size, related grain boundaries and their nature.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":664,\"journal\":{\"name\":\"Journal of Sol-Gel Science and Technology\",\"volume\":\"115 3\",\"pages\":\"1812 - 1826\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sol-Gel Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10971-025-06888-1\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06888-1","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Influence of copper and cobalt ions co–doping on structural, optical and dielectric properties of nanostructured anatase titanium dioxide
The pristine anatase titanium dioxide (TiO2) and transition metal (i.e. Cu and Co) co–doped anatase titanium dioxide nanoparticles (Ti0.988Cu0.002Co0.01O2) were synthesized using sol–gel auto–combustion technique. Structural, optical and dielectric properties have been studied to understand the effect of dopants across TiO2 lattice. X–ray diffraction (XRD) and Rietveld refinements confirm the formation of tetragonal structure having I41/amd space group, and crystallite size for co–doped TiO2 nanoparticles falls ~12.68 nm which has been further verified by Raman spectroscopy. UV visible spectroscopy was performed to estimate the band gap energy that gets reduced from ~3.2 eV for TiO2 to ~1.7 eV for co–doped TiO2 nanoparticles. Dielectric constant, dielectric loss and ac conductivity for co–doped TiO2 sample are explained in terms of crystallite size, related grain boundaries and their nature.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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