| 胡蕾.BiVO4/TiO2复合光催化剂的制备及可见光降解腐殖酸[J].分子催化,2013,(4):377-384 |
| BiVO4/TiO2复合光催化剂的制备及可见光降解腐殖酸 |
| Preparation of BiVO4/TiO2 composite photocatalyst and the photocatalytic degradation of sodium humate |
| 投稿时间：2013-05-31 修订日期：2013-07-25 |
| DOI： |
| 中文关键词: BiVO4/TiO2 光催化剂 可见光降解 腐殖酸 |
| 英文关键词:BiVO4/TiO2, photocatalyst, photocatalytic degradation, sodium humate |
| 基金项目:国家自然科学基金(No. 51209024)，大气环境模拟与污染控制四川省高校重点实验室开放基金（KFKT201302） |
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| 中文摘要: |
| 首先以P123为模板剂利用溶胶-凝胶法制备TiO2载体，然后采用沉淀法制得介孔BiVO4/TiO2复合光催化剂。采用X射线衍射仪、漫反射吸收光谱仪、比表面分析仪对所制得的光催化剂进行了表征。结果表明，催化剂样品中的TiO2主要以锐钛矿型存在，BiVO4为四方相和单斜相共存的混晶，与单纯的BiVO4、TiO2光催化剂相比，BiVO4/TiO2复合光催化剂具有更高的可见光吸收性能、较好的比表面积和均一的介孔结构。腐殖酸的可见光降解试验表明，随着腐殖酸初始浓度的增大，其光降解率逐渐降低，ln(C/C0)对t呈线性关系。试验同步研究了腐殖酸光催化降解过程中荧光光谱、红外光谱和GC-MS谱图的变化情况。 |
| 英文摘要: |
| The TiO2 support was prepared by Sol-Gel method with P123 as a template and the mesoporous BiVO4/TiO2 catalyst was obtained by the precipitation method. The obtained photocatalysts were characterized by X-ray diffraction, UV-visible spectrophotometer and surface area analyzer. It mainly contained anatase TiO2, the mixed crystal BiVO4 with coexisting tetragonal and monoclinic phases. Compared with BiVO4 and TiO2, BiVO4/TiO2 improved the performance of visible light absorbance and had a specific surface area and uniform mesoporous structure. With the increase of the initial concentration of humic acid，the degradation decreased, and ln (C/C0) on it is linear. This research carried out a preliminary study on the fluorescence , infrared and GC-MS spectral changes in photocatalytic degradation of humic acid. |
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