D. Herrera Garcia, M. G. Garnica-Romo, A. Ramos-Corona, F. Cervantes-Alvarez, L. García-González, N. Dasgupta-Schubert, J. J. Alvarado-Gil
{"title":"Photocatalytic activity under visible light of Ni:TiO2-NiTiO3 synthesized through a modified sol-gel method","authors":"D. Herrera Garcia, M. G. Garnica-Romo, A. Ramos-Corona, F. Cervantes-Alvarez, L. García-González, N. Dasgupta-Schubert, J. J. Alvarado-Gil","doi":"10.1007/s10971-024-06411-y","DOIUrl":null,"url":null,"abstract":"<p>One of the most challenging goals in materials science is to shift the absorption band of TiO<sub>2</sub> toward the visible region of the electromagnetic spectrum. This is a fundamental strategy to improve its photocatalytic performance. In this paper, we present a simple methodology based on the sol-gel method, which allows the displacement of the band edge of TiO<sub>2</sub>, accompanied by the appearance of additional absorption bands in the optical spectrum. In our methodology, TiO<sub>2</sub> was synthesized and doped with 5% and 10% w/w nickel. The resulting material was dried at 100 °C and subjected to thermal treatment at 500 °C for 1 h each. The obtained material was characterized by scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, diffuse reflectance, X-ray diffraction, Raman spectroscopy, and XPS. Our results indicate that Ni doping of TiO<sub>2</sub> was successfully carried out, while NiTiO<sub>3</sub> appears from the first drying stage at 100 °C and undergoes the transition from the amorphous to the crystalline phase during the sintering process at 500 °C. Furthermore, all the materials studied showed high catalytic activity under UV irradiation. In particular, the nickel-doped thermally treated materials also exhibited good catalytic performance under visible light, even better than the amorphous phases obtained under UV irradiation.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-05-18","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://doi.org/10.1007/s10971-024-06411-y","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}
引用次数: 0
Abstract
One of the most challenging goals in materials science is to shift the absorption band of TiO2 toward the visible region of the electromagnetic spectrum. This is a fundamental strategy to improve its photocatalytic performance. In this paper, we present a simple methodology based on the sol-gel method, which allows the displacement of the band edge of TiO2, accompanied by the appearance of additional absorption bands in the optical spectrum. In our methodology, TiO2 was synthesized and doped with 5% and 10% w/w nickel. The resulting material was dried at 100 °C and subjected to thermal treatment at 500 °C for 1 h each. The obtained material was characterized by scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, diffuse reflectance, X-ray diffraction, Raman spectroscopy, and XPS. Our results indicate that Ni doping of TiO2 was successfully carried out, while NiTiO3 appears from the first drying stage at 100 °C and undergoes the transition from the amorphous to the crystalline phase during the sintering process at 500 °C. Furthermore, all the materials studied showed high catalytic activity under UV irradiation. In particular, the nickel-doped thermally treated materials also exhibited good catalytic performance under visible light, even better than the amorphous phases obtained under UV irradiation.
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.