{"title":"UVC光下不同厚度Ga2O3薄膜光催化性能的增强","authors":"Ebru Şenadım Tüzemen","doi":"10.1007/s10562-025-05032-6","DOIUrl":null,"url":null,"abstract":"<div><p>Photocatalytic oxidation is a promising green technology for the degradation of toxic organic pollutants in water, offering an eco-friendly alternative that primarily generates harmless by-products such as CO<sub>2</sub> and H<sub>2</sub>O. In this study, gallium oxide (Ga<sub>2</sub>O<sub>3</sub>) thin films with varying thicknesses were synthesized using RF magnetron sputtering to optimize their photocatalytic efficiency for environmental remediation. The films were structurally and optically characterized, revealing a clear correlation between film thickness and optical band gap. Notably, the band gap narrowed with increasing thickness, ranging from 5.13 to 4.95 eV for unannealed films, and from 5.03 to 4.91 eV for films annealed at 500 °C. According to the XRD results, diffraction peaks were observed at 35.9° and 63.78° in the 342.4 nm Ga<sub>2</sub>O<sub>3</sub> film produced at 500 °C. These peaks correspond to the (111) and (403) planes of the β-Ga<sub>2</sub>O<sub>3</sub> phase. Photocatalytic activity, evaluated through the degradation of organic pollutants under UVC illumination, reached its peak in the unannealed 126.1 nm film and the annealed 342.4 nm film. These results indicate that precise control of film thickness and thermal treatment can significantly enhance photocatalytic performance. The study confirms that Ga<sub>2</sub>O<sub>3</sub> is a highly stable and effective photocatalyst, with strong potential for sustainable water purification and advanced optoelectronic applications such as UV photodetectors and solar-assisted catalytic systems.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 6","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement of Photocatalytic Performance of Ga2O3 Films with Different Thicknesses Under UVC Light\",\"authors\":\"Ebru Şenadım Tüzemen\",\"doi\":\"10.1007/s10562-025-05032-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Photocatalytic oxidation is a promising green technology for the degradation of toxic organic pollutants in water, offering an eco-friendly alternative that primarily generates harmless by-products such as CO<sub>2</sub> and H<sub>2</sub>O. In this study, gallium oxide (Ga<sub>2</sub>O<sub>3</sub>) thin films with varying thicknesses were synthesized using RF magnetron sputtering to optimize their photocatalytic efficiency for environmental remediation. The films were structurally and optically characterized, revealing a clear correlation between film thickness and optical band gap. Notably, the band gap narrowed with increasing thickness, ranging from 5.13 to 4.95 eV for unannealed films, and from 5.03 to 4.91 eV for films annealed at 500 °C. According to the XRD results, diffraction peaks were observed at 35.9° and 63.78° in the 342.4 nm Ga<sub>2</sub>O<sub>3</sub> film produced at 500 °C. These peaks correspond to the (111) and (403) planes of the β-Ga<sub>2</sub>O<sub>3</sub> phase. Photocatalytic activity, evaluated through the degradation of organic pollutants under UVC illumination, reached its peak in the unannealed 126.1 nm film and the annealed 342.4 nm film. These results indicate that precise control of film thickness and thermal treatment can significantly enhance photocatalytic performance. The study confirms that Ga<sub>2</sub>O<sub>3</sub> is a highly stable and effective photocatalyst, with strong potential for sustainable water purification and advanced optoelectronic applications such as UV photodetectors and solar-assisted catalytic systems.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 6\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-04-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05032-6\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05032-6","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Enhancement of Photocatalytic Performance of Ga2O3 Films with Different Thicknesses Under UVC Light
Photocatalytic oxidation is a promising green technology for the degradation of toxic organic pollutants in water, offering an eco-friendly alternative that primarily generates harmless by-products such as CO2 and H2O. In this study, gallium oxide (Ga2O3) thin films with varying thicknesses were synthesized using RF magnetron sputtering to optimize their photocatalytic efficiency for environmental remediation. The films were structurally and optically characterized, revealing a clear correlation between film thickness and optical band gap. Notably, the band gap narrowed with increasing thickness, ranging from 5.13 to 4.95 eV for unannealed films, and from 5.03 to 4.91 eV for films annealed at 500 °C. According to the XRD results, diffraction peaks were observed at 35.9° and 63.78° in the 342.4 nm Ga2O3 film produced at 500 °C. These peaks correspond to the (111) and (403) planes of the β-Ga2O3 phase. Photocatalytic activity, evaluated through the degradation of organic pollutants under UVC illumination, reached its peak in the unannealed 126.1 nm film and the annealed 342.4 nm film. These results indicate that precise control of film thickness and thermal treatment can significantly enhance photocatalytic performance. The study confirms that Ga2O3 is a highly stable and effective photocatalyst, with strong potential for sustainable water purification and advanced optoelectronic applications such as UV photodetectors and solar-assisted catalytic systems.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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