Qui Thanh Hoai Ta, Luan Minh Nguyen, Ngoc Hoi Nguyen, Phan Khanh Thinh Nguyen, Dai Hai Nguyen
{"title":"室温下 TiO2/SiNWs p-n 结催化剂的光催化甲烷氧化作用。","authors":"Qui Thanh Hoai Ta, Luan Minh Nguyen, Ngoc Hoi Nguyen, Phan Khanh Thinh Nguyen, Dai Hai Nguyen","doi":"10.3762/bjnano.15.92","DOIUrl":null,"url":null,"abstract":"<p><p>Rapid recombination of charge carriers in semiconductors is a main drawback for photocatalytic oxidative coupling of methane (OCM) reactions. Herein, we propose a novel catalyst by developing a p-n junction titania-silicon nanowires (TiO<sub>2</sub>/SiNWs) heterostructure. The structure is fabricated by atomic layer deposition of TiO<sub>2</sub> on p-type SiNWs. The TiO<sub>2</sub>/SiNWs heterostructure exhibited an outstanding OCM performance under simulated solar light irradiation compared to the single components. This enhanced efficiency was attributed to the intrinsic electrical field formed between n-type TiO<sub>2</sub> and p-type SiNWs, which forces generated charge carriers to move in opposite directions and suppresses charge recombination. Besides, surface morphology and optical properties of the the p-n TiO<sub>2</sub>/SiNWs catalyst are also beneficial for the photocatalytic activity. It is expected that the results of this study will provide massive guidance in synthesizing an efficient photocatalyst for CH<sub>4</sub> conversion under mild conditions.</p>","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11403797/pdf/","citationCount":"0","resultStr":"{\"title\":\"Photocatalytic methane oxidation over a TiO<sub>2</sub>/SiNWs p-n junction catalyst at room temperature.\",\"authors\":\"Qui Thanh Hoai Ta, Luan Minh Nguyen, Ngoc Hoi Nguyen, Phan Khanh Thinh Nguyen, Dai Hai Nguyen\",\"doi\":\"10.3762/bjnano.15.92\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Rapid recombination of charge carriers in semiconductors is a main drawback for photocatalytic oxidative coupling of methane (OCM) reactions. Herein, we propose a novel catalyst by developing a p-n junction titania-silicon nanowires (TiO<sub>2</sub>/SiNWs) heterostructure. The structure is fabricated by atomic layer deposition of TiO<sub>2</sub> on p-type SiNWs. The TiO<sub>2</sub>/SiNWs heterostructure exhibited an outstanding OCM performance under simulated solar light irradiation compared to the single components. This enhanced efficiency was attributed to the intrinsic electrical field formed between n-type TiO<sub>2</sub> and p-type SiNWs, which forces generated charge carriers to move in opposite directions and suppresses charge recombination. Besides, surface morphology and optical properties of the the p-n TiO<sub>2</sub>/SiNWs catalyst are also beneficial for the photocatalytic activity. It is expected that the results of this study will provide massive guidance in synthesizing an efficient photocatalyst for CH<sub>4</sub> conversion under mild conditions.</p>\",\"PeriodicalId\":8802,\"journal\":{\"name\":\"Beilstein Journal of Nanotechnology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-09-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11403797/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Beilstein Journal of Nanotechnology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.3762/bjnano.15.92\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Beilstein Journal of Nanotechnology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3762/bjnano.15.92","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
半导体中电荷载流子的快速重组是光催化甲烷氧化偶联（OCM）反应的主要缺点。在此，我们通过开发一种 p-n 结二氧化钛-硅纳米线（TiO2/SiNWs）异质结构，提出了一种新型催化剂。该结构是通过在 p 型硅纳米线上原子层沉积 TiO2 制成的。与单一成分相比，TiO2/SiNWs 异质结构在模拟太阳光照射下表现出卓越的 OCM 性能。效率的提高归功于 n 型 TiO2 和 p 型 SiNWs 之间形成的固有电场，该电场迫使产生的电荷载流子向相反的方向移动，从而抑制了电荷重组。此外，p-n TiO2/SiNWs 催化剂的表面形貌和光学特性也有利于提高光催化活性。预计本研究的结果将为在温和条件下合成一种用于转化 CH4 的高效光催化剂提供大量指导。
Photocatalytic methane oxidation over a TiO2/SiNWs p-n junction catalyst at room temperature.
Rapid recombination of charge carriers in semiconductors is a main drawback for photocatalytic oxidative coupling of methane (OCM) reactions. Herein, we propose a novel catalyst by developing a p-n junction titania-silicon nanowires (TiO2/SiNWs) heterostructure. The structure is fabricated by atomic layer deposition of TiO2 on p-type SiNWs. The TiO2/SiNWs heterostructure exhibited an outstanding OCM performance under simulated solar light irradiation compared to the single components. This enhanced efficiency was attributed to the intrinsic electrical field formed between n-type TiO2 and p-type SiNWs, which forces generated charge carriers to move in opposite directions and suppresses charge recombination. Besides, surface morphology and optical properties of the the p-n TiO2/SiNWs catalyst are also beneficial for the photocatalytic activity. It is expected that the results of this study will provide massive guidance in synthesizing an efficient photocatalyst for CH4 conversion under mild conditions.
期刊介绍：
The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology.
The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
