| Ag_2O/TiO_2异质结的光催化活性及耐光腐蚀性研究 |
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| 引用本文： | 杨慧娟,邵铭哲,周健兴,薛晋波.Ag_2O/TiO_2异质结的光催化活性及耐光腐蚀性研究[J].人工晶体学报,2017(2):243-250. |
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| 作者姓名： | 杨慧娟 邵铭哲 周健兴 薛晋波 |
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| 作者单位： | 太原理工大学新材料界面科学与工程教育部重点实验室,太原030024;太原理工大学新材料工程技术研究中心,太原030024;太原理工大学材料科学与工程学院,太原030024 |
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| 基金项目： | 国家自然科学基金(51402209)，山西省基础研究项目(2015021075)，山西省高校科技创新研究项目(2016124)，太原理工大学校基金(2015MS046) |
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| 摘 要： | 以钛酸丁酯、硝酸铋和硝酸银为原料,FTO为基底,采用水热法结合超声沉积法合成了Ag_2O/TiO_2异质结光催化剂。采用场发射扫描电子显微镜(FESEM)、X射线衍射仪(XRD)、紫外-可见吸收光谱(UV-Vis)分析测试手段对样品的形貌和结构进行了表征。结果表明,Ag_2O/TiO_2异质结是由直径约200~300 nm的TiO_2纳米棒镶嵌着Ag_2O纳米颗粒组成,与TiO_2纳米棒阵列相比,Ag_2O/TiO_2异质结在可见光区有明显的光吸收。Ag_2O/TiO_2异质结的光催化效率明显提高。尤为重要的是,经光处理后,最终得到稳定的Ag-Ag_2O/TiO_2三元体系,并对Ag-Ag_2O/TiO_2三元体系提高光催化稳定性和活性的机理进行了分析。
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| 关 键 词： | TiO2纳米棒阵列 Ag2O/TiO2 Ag-Ag2O/TiO2 光催化 |
Photocatalytic Activity and Anti-photocorrosion Properties of Ag2O/TiO2 Heterojunction |
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| Abstract: | Ag2O/TiO2 heterojunction photocatalysts were synthesized on FTO through hydrothennal method and ultrasonic precipitation method with precursors (Ti (Obu)4,Bi (NO3) 2 and AgNO3).The structures and morphologies of Ag2O/TiO2 heterostructure were investigated by field emission scanning electron microscopy (FESEM),X-ray diffraction (XRD) and UV-Vis spectra.The results indicate that Ag2O/TiO2 heterostructures consist of TiO2 nanorod arrays decorated with 200-300 nm Ag2O nanoparticles.Compared to the pure TiO2 nanorod arrays,the Ag2O/TiO2 heterostructures exhibit obviously absorption under visible light irradiation.Ag2O/TiO2 heterojunction photocatalytic activity improves significantly.Further,through visible light irradiation treatment,Ag-Ag2O/TiO2 composite stability system were fabricated,the mechanism for improving photocatalytic stability and activity of Ag-Ag2O/TiO2 composite system was also proposed. |
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| Keywords: | TiO2 nanorod array Ag2O/TiO2 heterostructures Ag-Ag2O/TiO2 photocatalysis |
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