金属/TiO_2 Yolk-Shell结构的构筑及催化性能研究
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- 英文论文题名：The construct and catalytic properties of metal/TiO_2 Yolk-Shell nanostructure
- 论文作者：林茜颉 ; 吕荣文 ; 曹安民
- 英文论文作者：Xijie Lin ; Rongwen Lv ; Anmin Cao ; State Key Laboratory of Fine Chemicals ; Dalian University of Technology ; Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences ; Institute of Chemistry ; Chinese Academy of Sciences (CAS)
- 年：2016
- 作者机构：大连理工大学精细化工国家重点实验室;中国科学院化学研究所分子纳米结构与纳米技术重点实验室;
- 论文关键词：Yolk-Shell ; 包覆 ; 金属 ; 催化
- 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-第三十七分会：纳米催化
- 语种：中文
- 分类号：O643.3
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十七分会 ; 纳米催化
- 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：2
- 文件大小：181k
- 原文格式：D
- 会议级别：全国
摘要
本研究报道了一种合成不同金属/TiO_2 yolk-Shell结构材料的方法,并探讨了其在催化过程中的应用潜力。相关合成首先通过酚醛树脂在不同金属离子存在条件下的聚合过程,得到了金属离子与酚醛树脂的复合物,然后在复合物表面进行可控的TiO_2表面包覆,结合特定的后续热处理,实现了空腔结构的构筑及金属纳米颗粒在TiO_2壳层内的原位保护,获得了具有均一、分散的金属/TiO_2 yolk-shell的复合结构。我们利用透射电子显微镜(TEM)、粉末X射线衍射仪(XRD)、N_2等温吸脱附仪(BET)等表征手段对样品的形貌和结构进行了详细的分析,并讨论了反应条件对所得到的复合结构的影响;并通过对一系列不同贵金属阳离子的考察,证实了相关的合成方法具有良好的适应性,可以应用于一系列涉及不同贵金属的yolk-shell结构的构筑。我们同时探讨了所得到的复合结构在特定催化体系上的应用。例如,对于所制备的的Pd/TiO_2复合材料,其在碘苯和苯硼酸的偶联反应中显示了优异的催化活性。
We reported a versatile method which can synthesize different metal/TiO_2 yolk-shell nanocomposites,and discussed the catalytic application.Firstly,metal salt/phenolic resin composite was prepared by introducing metal salt into the polymerization of 3-aminophenol and formaldehyde.And then,a shell of TiO_2 was controllably coated on the surface of this composite.After calcination,the hollow structure was constructed,and metal nanoparticles was well protected in the TiO_2 shell.Transmission electron microscope(TEM),X-ray diffraction(XRD),and N_2 sorption were used to characterized the structure and morphology of sample,and the influence of reaction conditions were also analyzed.By using different noble metal salt as metal source,it could be verified that this method was a general synthesis route to obtain metal/TiO_2 yolk-shell nanocomposite.Meanwhile,we investigated the catalytic performance of this sample.For instance,the as-prepared Pd/TiO_2 sample showed excellent catalytic activity in the Suzuki coupled reaction.
We reported a versatile method which can synthesize different metal/TiO_2 yolk-shell nanocomposites,and discussed the catalytic application.Firstly,metal salt/phenolic resin composite was prepared by introducing metal salt into the polymerization of 3-aminophenol and formaldehyde.And then,a shell of TiO_2 was controllably coated on the surface of this composite.After calcination,the hollow structure was constructed,and metal nanoparticles was well protected in the TiO_2 shell.Transmission electron microscope(TEM),X-ray diffraction(XRD),and N_2 sorption were used to characterized the structure and morphology of sample,and the influence of reaction conditions were also analyzed.By using different noble metal salt as metal source,it could be verified that this method was a general synthesis route to obtain metal/TiO_2 yolk-shell nanocomposite.Meanwhile,we investigated the catalytic performance of this sample.For instance,the as-prepared Pd/TiO_2 sample showed excellent catalytic activity in the Suzuki coupled reaction.
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