高稳定性的碳包覆中空纳米球的制备及其催化性能
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- 英文论文题名：Preparation of highly stable hollow nanoshperes and its catalytic properties
- 论文作者：吴国庆 ; 梁小玉 ; 岳凡 ; 王吉德 ; 宿新泰
- 英文论文作者：Guoqing Wu ; Xiaoyu Liang ; Fan Yue ; Jide Wang ; Xintai Su ; Ministry Key Laboratory of Oil and Gas Fine Chemicals ; College of Chemistry and Chemical Engineering ; Xinjiang University
- 年：2016
- 作者机构：石油天然气精细化工教育部重点实验室新疆大学化学与化工学院;
- 论文关键词：纳米中空球 ; 高稳定性 ; 高活性 ; 金属氧化物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：157k
- 原文格式：D
- 会议级别：全国
摘要
近年来,许多科研工作者致力于合成高稳定的,大比表面积和高结晶的纳米中空球(hollow nanospheres,HNSs)。但是,通常的湿化学方法制备的纳米中空稳定性较差,容易发生坍塌。模板法制备的中空球的适用范围有限。因此,发展一种科研合成高稳定性,高纯度的纳米中空结构是十分必要的。在本文中,我们利用Kirkendall效应制备了碳包覆的纳米氧化物中空球。N2吸附-脱附表明,合成的碳包覆的金属氧化物纳米中空球的金属层和碳层都是介孔的。这意味着,小分子可以进入到中空球内部,从而大大提高材料的活性位点。将合成的材料应用于催化还原对硝基苯酚,其表现出了很高的催化活性和结构稳定性。此过程的创新点在于,合成了高稳定的,高纯度的和高活性的纳米中空球。
Synthesis of metal oxide hollow nanospheres(HNSs) with a small grain size, large surface area and high degree of crystallinity is favorable to achieve promising applications. But traditional synthetic approaches generally involve many tedious steps and the HNSs with a small grain size tended to collapse partially. In this work, metal oxides HNSs coated with porous carbon shell with good structural stability were successfully prepared based on a template-free method. The results of N2 adsorption-desorption noted that both HNSs and the carbon shell had mesoporous pores. Therefore, small molecules can access the inner space of the whole HNSs@C, which facilitates their catalytic applications. As an example of the functional properties, the HNSs@C were investigated as the catalyst for the hydrogenation of 4-nitrophenol to 4-aminoophenol, which manifested higher catalytic activity and excellent stability.
Synthesis of metal oxide hollow nanospheres(HNSs) with a small grain size, large surface area and high degree of crystallinity is favorable to achieve promising applications. But traditional synthetic approaches generally involve many tedious steps and the HNSs with a small grain size tended to collapse partially. In this work, metal oxides HNSs coated with porous carbon shell with good structural stability were successfully prepared based on a template-free method. The results of N2 adsorption-desorption noted that both HNSs and the carbon shell had mesoporous pores. Therefore, small molecules can access the inner space of the whole HNSs@C, which facilitates their catalytic applications. As an example of the functional properties, the HNSs@C were investigated as the catalyst for the hydrogenation of 4-nitrophenol to 4-aminoophenol, which manifested higher catalytic activity and excellent stability.
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