Thi Viet Ha Luu, Nguyen Thi Mai Tho, Tran Thi Thanh Thuy, Le Nhat Thong, Nguyen Trung Dung, Phuc Huu Dang
{"title":"合成在可见光下去除氧氟沙星和亚甲基蓝的类药丸 C 掺杂纳米氧化锌光催化剂","authors":"Thi Viet Ha Luu, Nguyen Thi Mai Tho, Tran Thi Thanh Thuy, Le Nhat Thong, Nguyen Trung Dung, Phuc Huu Dang","doi":"10.1007/s10971-024-06348-2","DOIUrl":null,"url":null,"abstract":"<p>Carbon-doped zinc oxides were synthesized with different concentrations corresponding to PVA/Zn2+ molar ratios between 5 and 15% by the hydrothermal method. The XRD and SEM results show that the obtained materials have high crystallinity and a pill-like morphology. Carbon dopant significantly decreased band gap energy (EgCZ3 = 2.77 eV), improving the optical absorption of ZnO in the visible and ultraviolet regions. Generally, the catalyst with carbon doped 1.49% (CZ3), corresponding to the molar ratio of PVA/Zn<sup>2+</sup> = 15%, showed the highest photocatalytic efficiency of ofloxacin (Ofx) and methylene blue (MB) and was higher than pure ZnO. This is possibly attributed to its morphology with good uniformity and porosity; the specific surface area of SCZ3 is 26 m<sup>2</sup>/g which is 1.5 times higher than ZnO. Moreover, it is also relative to the stable and highest saturation photocurrent density of CZ3, which is ∼6.4 µA.cm<sup>−2</sup>, 4.15 times higher than pure ZnO. In addition, trapping experiments showed that positive holes and hydroxyl radicals were the predominant active agents. Finally, COD and TOC analysis results suggested that the photodegradation progress of MB and Ofx formed organic compounds with smaller structures and proved that over 78% of MB and 66% of Ofx were converted entirely to simple inorganic substances such as CO2, H2O, etc.</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":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synthetization pill-like C-doped ZnO nano-photocatalyst for removing ofloxacin and methylene blue under visible light\",\"authors\":\"Thi Viet Ha Luu, Nguyen Thi Mai Tho, Tran Thi Thanh Thuy, Le Nhat Thong, Nguyen Trung Dung, Phuc Huu Dang\",\"doi\":\"10.1007/s10971-024-06348-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Carbon-doped zinc oxides were synthesized with different concentrations corresponding to PVA/Zn2+ molar ratios between 5 and 15% by the hydrothermal method. The XRD and SEM results show that the obtained materials have high crystallinity and a pill-like morphology. Carbon dopant significantly decreased band gap energy (EgCZ3 = 2.77 eV), improving the optical absorption of ZnO in the visible and ultraviolet regions. Generally, the catalyst with carbon doped 1.49% (CZ3), corresponding to the molar ratio of PVA/Zn<sup>2+</sup> = 15%, showed the highest photocatalytic efficiency of ofloxacin (Ofx) and methylene blue (MB) and was higher than pure ZnO. This is possibly attributed to its morphology with good uniformity and porosity; the specific surface area of SCZ3 is 26 m<sup>2</sup>/g which is 1.5 times higher than ZnO. Moreover, it is also relative to the stable and highest saturation photocurrent density of CZ3, which is ∼6.4 µA.cm<sup>−2</sup>, 4.15 times higher than pure ZnO. In addition, trapping experiments showed that positive holes and hydroxyl radicals were the predominant active agents. Finally, COD and TOC analysis results suggested that the photodegradation progress of MB and Ofx formed organic compounds with smaller structures and proved that over 78% of MB and 66% of Ofx were converted entirely to simple inorganic substances such as CO2, H2O, etc.</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\":\"2024-03-06\",\"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/s10971-024-06348-2\",\"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://doi.org/10.1007/s10971-024-06348-2","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}
Synthetization pill-like C-doped ZnO nano-photocatalyst for removing ofloxacin and methylene blue under visible light
Carbon-doped zinc oxides were synthesized with different concentrations corresponding to PVA/Zn2+ molar ratios between 5 and 15% by the hydrothermal method. The XRD and SEM results show that the obtained materials have high crystallinity and a pill-like morphology. Carbon dopant significantly decreased band gap energy (EgCZ3 = 2.77 eV), improving the optical absorption of ZnO in the visible and ultraviolet regions. Generally, the catalyst with carbon doped 1.49% (CZ3), corresponding to the molar ratio of PVA/Zn2+ = 15%, showed the highest photocatalytic efficiency of ofloxacin (Ofx) and methylene blue (MB) and was higher than pure ZnO. This is possibly attributed to its morphology with good uniformity and porosity; the specific surface area of SCZ3 is 26 m2/g which is 1.5 times higher than ZnO. Moreover, it is also relative to the stable and highest saturation photocurrent density of CZ3, which is ∼6.4 µA.cm−2, 4.15 times higher than pure ZnO. In addition, trapping experiments showed that positive holes and hydroxyl radicals were the predominant active agents. Finally, COD and TOC analysis results suggested that the photodegradation progress of MB and Ofx formed organic compounds with smaller structures and proved that over 78% of MB and 66% of Ofx were converted entirely to simple inorganic substances such as CO2, H2O, etc.
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.