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首页> 外文期刊>RSC Advances >A simple, rapid, one-step approach for preparation of Ag@TiO2 nanospheres with multiple cores as effective catalyst
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A simple, rapid, one-step approach for preparation of Ag@TiO2 nanospheres with multiple cores as effective catalyst

机译：一种简单，快速，一步的一步方法，用于制备具有多个核心作为有效催化剂的Ag @ TiO2纳米球

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摘要

Novel Ag@TiO _(2) nanostructures with multiple Ag nanoparticles as cores and a crystalline TiO _(2) as the outer shell have been successfully achieved via a facile and one-step solvothermal route. The synthetic approach is simple, rapid, and environmentally friendly, in which no any sacrificial template, toxic reagent or surfactant is emploited. Moreover, the as-prepared Ag@TiO _(2) products show an uniform and spherical morphology as well as a large specific surface area (225.9 m ~(2) g ~(?1) ). The time-dependent experiments reveal that the formation of Ag@TiO _(2) nanospheres includes a nucleation, aggregation and self-assembly process. Apart form this, the rattle-type Ag@TiO _(2) nanoparticles can be also obtained by only tuning the amount of tetrabutyl titanate (TBOT) added in the precursor. When employed as catalyst for reduction of 4-nitrophenol (4-NP), the Ag@TiO _(2) nanospheres prepared exhibit a superior catalytic activity and a good cycle stability, benefiting from their unique multiple-cored nanostructure and the effective synergistic effect between Ag nanoparticles and TiO _(2) shell. The present method also provides a great possibility for preparation of other metal@TiO _(2) nanocomposites and their promising applications in catalysis, electrochemistry, and purification, and so on.
机译：通过容易和一步的溶液成功地实现了具有多个Ag纳米颗粒作为芯和结晶TiO _（2）的新型Ag @ TiO _（2）纳米结构，作为外壳，通过容易和一步的溶液成功地实现。合成方法简单，快速，环保，其中不再渗透了任何牺牲模板，有毒试剂或表面活性剂。此外，AS制备的AG @ TiO _（2）产品显示均匀和球形的形态以及大的比表面积（225.9m〜（2）G〜（α1））。时间依赖性实验表明，AG @ TiO _（2）纳米球的形成包括成核，聚集和自组装过程。除了形式中，还可以通过调节在前体中加入的四丁基钛（TBOT）的量来获得拨浪鼓型Ag @ TiO _（2）纳米颗粒。当用作4-硝基苯酚（4-NP）的催化剂时，制备的Ag @ TiO _（2）纳米球具有优异的催化活性和良好的循环稳定性，受益于其独特的多芯纳米结构和有效协同作用Ag纳米颗粒和TiO _（2）壳之间。本方法还提供了制备其他金属@ TiO _（2）纳米复合材料的可能性，以及在催化，电化学和纯化等中的有前途的应用。

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