| 四角星形BiVO4/Bi2O3催化剂的制备及性能 |
| Preparation and Performance of Four Angle Star-like BiVO4/Bi2O3 Catalyst |
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| 摘要: 采用水热法合成具有四角星形貌的钒酸铋,再将钒酸铋浸渍在碱溶液里二次水热,制备出BiVO4/Bi2O3催化剂。采用X射线粉末衍射(XRD)、扫描电子显微镜(SEM),紫外-可见漫反射(UV-Vis DRS)等方法对样品进行表征。可见光下,BiVO4/Bi2O3复合物的光催化降解罗丹明B性能及光电流响应均优于纯BiVO4。这是由于BiVO4/Bi2O3复合材料形成了异质结构,有效抑制了光生电子与空穴的复合效率。 |
| 关键词: BiVO4/Bi2O3 光催化 水热法 异质结构 |
| 基金项目: 国家自然科学基金(No.21401093)和辽宁省高等学校优秀科技人才支持计划(No.LR2015036)资助项目。 |
| Abstract: BiVO4 powders with four angle star-like were prepared by hydrothermal method, and then were dipped in alkali solution by hydrothermal route to synthesize BiVO4/Bi2O3.The as-synthesized samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), UV-Vis diffuse reflection absorption(DRS).Under visible light irradiation, the BiVO4/Bi2O3 composite exhibits much better photocatalytic performance for degradation of rhodamine B(RhB) and higher photocurrent(PC) than pure BiVO4.This significant enhancement on visible-light-driven photocatalytic activity should be ascribed to the formation of the BiVO4/Bi2O3 heterojunction, which can result in the high separation and transfer efficiency of photogenerated charge carriers. |
| Keywords: BiVO4/Bi2O3 photocatalytic hydrothermal heterogeneous structure |
| 投稿时间：2015-12-30 修订日期：2016-02-20 |
| 摘要点击次数: 1980 |
| 全文下载次数: 2584 |
| 单爽,杨占旭.四角星形BiVO4/Bi2O3催化剂的制备及性能[J].无机化学学报,2016,32(4):649-654. |
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