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Mesoporous Au/TiO _2 nanocomposite microspheres for visible-light photocatalysis

机译:介孔Au / TiO _2纳米复合微球的可见光催化

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Mesoporous Au/TiO _2 nanocomposite microspheres have been synthesized by using a microemulsion-based bottom-up self-assembly (EBS) process starting from monodisperse gold and titania nanocrystals as building blocks. The microspheres had large surface areas (above 270 m ~2 g ~(-1)) and open mesopores (about 5 nm), which led to the adsorption-driven concentration of organic molecules in the vicinity of the microspheres. Au nanoparticles, which were stably confined within the microspheres, enhanced the absorption over the broad UV/Vis/NIR spectroscopic range, owing to their strong surface plasmon resonance (SPR); as a result, the Au nanoparticles promoted the visible-light photo-induced degradation of organic compounds.
机译:介孔Au / TiO _2纳米复合微球已经通过使用基于微乳液的自下而上自组装(EBS)工艺合成,该工艺以单分散金和二氧化钛纳米晶体为基础。微球具有较大的表面积(在270 m〜2 g〜(-1)以上)和开放的中孔(约5 nm),这导致了微球附近有机分子的吸附驱动浓度。稳定地限制在微球内的金纳米颗粒由于其强大的表面等离子体共振(SPR)而在宽的UV / Vis / NIR光谱范围内增强了吸收;结果,金纳米颗粒促进了可见光光诱导的有机化合物降解。

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