| 纳米结构Au/Fe_2O_3的制备、表征及催化氧化性能 |
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| 引用本文： | 赵建波,符滕,李磊,丁维平. 纳米结构Au/Fe_2O_3的制备、表征及催化氧化性能[J]. 无机化学学报, 2014, 30(7): 1489-1495 |
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| 作者姓名： | 赵建波 符滕 李磊 丁维平 |
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| 作者单位： | 介观化学教育部重点实验室, 南京大学化学化工学院, 南京 210093;河南省表界面科学重点实验室，郑州轻工业学院，郑州 450002;介观化学教育部重点实验室, 南京大学化学化工学院, 南京 210093;介观化学教育部重点实验室, 南京大学化学化工学院, 南京 210093;介观化学教育部重点实验室, 南京大学化学化工学院, 南京 210093 |
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| 基金项目： | 国家自然科学基金（No.21273107）和河南省教育厅自然科学基金（No.2010A530013）资助项目。 |
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| 摘 要： | 分别以纳米和块状氧化铁为载体,通过沉积沉淀法制备了Au/Nano-Fe2O3和Au/Bulk-Fe2O3,并对其进行了表征和催化氧化性能测试。结果表明:对于Au/Nano-Fe2O3,5 nm Au颗粒被尺寸相当的Nano-Fe2O3所包覆,形成新颖的类似核壳结构;对于Au/Bulk-Fe2O3,3 nm Au颗粒高度分散于Bulk-Fe2O3的表面。在1-苯乙醇的氧化反应中,Au/Nano-Fe2O3显示出比Au/Bulk-Fe2O3更好的催化活性。活性的增强主要与小尺寸的Nano-Fe2O3以及Au和Nano-Fe2O3更大的接触界面有关。相比于广泛受到重视的Au的尺寸效应来说,对于Au/Nano-Fe2O3而言,Fe2O3尺寸的影响更大。
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| 关 键 词： | 金 氧化铁 多相催化 纳米结构 氧化 |
| 收稿时间： | 2014-01-28 |
| 修稿时间： | 2014-04-18 |
Synthesis, Characterizations and Catalytic Performance of Nanostructure Au/Fe2O3 |
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| ZHAO Jian-Bo,FU Teng,LI Lei and DING Wei-Ping. Synthesis, Characterizations and Catalytic Performance of Nanostructure Au/Fe2O3[J]. Chinese Journal of Inorganic Chemistry, 2014, 30(7): 1489-1495 |
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| Authors: | ZHAO Jian-Bo FU Teng LI Lei DING Wei-Ping |
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| Affiliation: | Key Lab of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, China;Key Lab of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;Key Lab of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;Key Lab of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China |
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| Abstract: | Au/Nano-Fe2O3 and Au/Bulk-Fe2O3 were prepared by the deposition precipitation method using Nano-Fe2O3 and Bulk-Fe2O3, respectively, as the support. The materials were characterized and evaluated for the aerobic oxidation of 1-phenylethanol. The results show that the Au/Nano-Fe2O3 possesses a novel structure with ~5 nm Au nanoparticles surrounded by the equal-sized nano Fe2O3, while ~3 nm Au nanoparticles are highly dispersed on the surface of Bulk-Fe2O3 in Au/Bulk-Fe2O3. Au/Nano-Fe2O3 shows the enhanced activity for the aerobic oxidation of 1-phenylethanol than that of Au/Bulk-Fe2O3. The promoted catalytic property is related to the equal-sized nano Fe2O3 and more boundaries between Au and Nano-Fe2O3. In comparison with Au nanoparticle size effect, which has attracted considerable attention in current literatures, our results indicate that the particle size of the support has significant influence on the activity of Au catalysts. |
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| Keywords: | gold iron oxide heterogeneous catalysis nanostructures oxidation |
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