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| Fe3O4@SiO2@mTiO2-Au复合材料的制备及其催化性能研究 |
| Preparation and catalytic performance of Fe3O4@SiO2@mTiO2-Au composites |
| 投稿时间：2021-09-30 |
| DOI： |
| 中文关键词: 催化化学 纳米金 包覆 核壳结构 磁性 制备 |
| 英文关键词: catalytic chemistry nano gold coating core-shell structure magnetic preparation |
| 基金项目:陕西省科技厅项目(2020j-602)；陕西理工大学人才启动项目(SLGRCQD2027) |
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| 中文摘要: |
| 以磁性Fe3O4为核，在其表面负载SiO2，并用介孔TiO2 (mTiO2)进行包覆，用3-氨丙基三甲氧基硅烷对其改性，将纳米金颗粒均匀负载在介孔TiO2表面，制备出核壳型纳米Fe3O4@SiO2 @mTiO2 -Au复合材料。用透射电镜(TEM)、振动样品磁强计(VSM)、X射线光电子能谱分析(XPS)和X射线衍射分析(XRD)等对样品进行表征，确认了核壳结构的存在，尺寸约3 nm的纳米金负载在表面。催化活性测试结果表明，该材料对对硝基苯酚在25 min内降解率达83%，对铁氰酸钾在30 min内降解率达84%。 |
| 英文摘要: |
| The core-shell nano-Fe3O4@SiO2@mTiO2-Au composites were prepared by loading SiO2 on the surface of magnetic Fe3O4 as the core and coating it with mesoporous TiO2 (mTiO2), which was modified with 3-aminopropyl trimethoxysilane to uniformly load gold nanoparticles on the surface of mesoporous TiO2. The samples were characterized by transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The existence of core-shell structure was confirmed, and gold nanoparticles with a size of about 3 nm were loaded on the surface. The catalytic activity test results showed that the degradation rates of p-nitrophenol and potassium ferricyanate were 83% within 25 min and 84% within 30 min, respectively. |
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