Co-Template Directed Synthesis of Gold Nanoparticles in Mesoporous Titanium Dioxide
Co-Template Directed Synthesis of Gold Nanoparticles in Mesoporous Titanium Dioxide
复制标题
DOI：
10.1002/chem.201801223
复制
发表时间：
2018-07-05
影响因子：
4.3
通讯作者：
He, Jie
中科院分区：
文献类型：
--
作者：
Liu, Ben;Louis, Michael;He, Jie
报道了一种自下而上的合成方法，将预先合成的、定义明确的金纳米颗粒（AuNPs）封装到介孔二氧化钛骨架（Au@mTiO（2））中。该方法采用两种结构和化学上相似的两亲性嵌段共聚物模板以及聚（环氧乙烷）栓系的金纳米粒子，其在溶胶-凝胶转变和高温热退火过程中表现出优异的稳定性。这样的合成使得能够精确控制介孔TiO 2框架内AuNP的尺寸和负载。在光驱动甲醇脱氢反应中，纳米金的存在显著提高了mTiO（2）的光催化活性。这种共模板定向合成提供了新的机会来理解AuNP尺寸在使用Au@mTiO（2）材料的纳米化中的影响。
A bottom-up synthetic methodology to encapsulate pre-synthesized, well-defined gold nanoparticles (AuNPs) into mesoporous titanium dioxide framework (Au@mTiO(2)) is reported. This method employs two structurally and chemically similar templates of amphiphilic block copolymers as well as poly(ethylene oxide)-tethered AuNPs, which showed excellent stability during sol-gel transition and thermal annealing at elevated temperatures. Such synthesis enabled precise control of sizes and loading of AuNPs within the mesoporous TiO2 framework. In light-driven methanol dehydrogenation, the presence of AuNPs significantly enhanced the photocatalytic activity of mTiO(2). This co-template-directed synthesis presents new opportunities to understand the effect of AuNP size in photocatalysis using Au@mTiO(2) materials.