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| 不同pH下KBiFe2O5可见光催化性能研究 | |
| 引用本文： | 李健,张刚华,范立坤,黄国全,高志鹏,曾涛. 不同pH下KBiFe2O5可见光催化性能研究[J]. 无机材料学报, 2018, 33(7): 805-810. DOI: 10.15541/jim20170610 |
| 作者姓名： | 李健 张刚华 范立坤 黄国全 高志鹏 曾涛 |
| 作者单位： | 1. 上海电力学院 环境与化学工程学院, 上海 200090; 2. 上海材料研究所 上海市工程材料应用与评价重点实验室, 上海 200437; 3. 中国工程物理研究院 流体物理研究所, 冲击波和爆轰物理国家重点实验室, 绵阳 621900 |
| 摘 要： | 采用温和的水热法制备了多铁KBiFe2O5粉体。利用X射线衍射(XRD)和场发射扫描电子显微镜(FE-SEM)等手段对样品的纯度及形貌进行了表征。利用紫外-可见漫反射(UV-Vis DRS)测试了样品的光吸收性能。通过降解罗丹明B(RhB)和甲基橙(MO)研究了染料溶液pH值对KBiFe2O5可见光催化性能的影响。结果显示, KBiFe2O5的可见光催化性能随着溶液pH值的下降而显著提升, 这是由于溶液中的催化剂在酸性条件下具有更好的分散性, 并且染料分子更容易吸附到催化剂表面, 从而提高催化效率。 |
| 关 键 词： | KBiFe2O5 光催化剂 可见光照射 pH |
| 收稿时间： | 2017-12-28 |
Enhanced Visible-light-driven Photocatalytic Activity of Multiferroic KBiFe2O5 by Adjusting pH Value |
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| LI Jian,ZHANG Gang-Hua,FAN Li-Kun,HUANG Guo-Quan,GAO Zhi-Peng,ZENG Tao. Enhanced Visible-light-driven Photocatalytic Activity of Multiferroic KBiFe2O5 by Adjusting pH Value[J]. Journal of Inorganic Materials, 2018, 33(7): 805-810. DOI: 10.15541/jim20170610 | |
| Authors: | LI Jian ZHANG Gang-Hua FAN Li-Kun HUANG Guo-Quan GAO Zhi-Peng ZENG Tao |
| Affiliation: | 1. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; 2. Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, China; 3. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
| Abstract: | Multiferroic KBiFe2O5 was successfully prepared by a facile hydrothermal method. Its phase purity and morphology were investigated by powder X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The visible-light absorption was confirmed by UV-Vis diffuse reaction spectroscopy (UV-Vis DRS). Effect of pH value on visible-light-driven photocatalytic properties of KBiFe2O5 was evaluated by degrading rhodamine B (RhB) and methyl orange (MO). It can be found that lower pH value contributed to smaller average particle size. The D50 of the sample at pH 7 is about 10 times larger than that at pH 2. Acid condition is beneficial to the dispersion of KBiFe2O5 nanoparticles, which leads to an enhanced photocatalytic performance. Photocatalytic activity of KBiFe2O5 is significantly improved by decreasing pH value of the solution, which is attributed to the promoted dispersion of catalyst particles in the suspension and the enhanced adsorption of dye molecules on the catalyst surface. |
| Keywords: | KBiFe2O5 photocatalyst visible-light irradiation pH value |
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