Abstract

Monolithic, optically transparent silica was synthesized for the first time by a green-chemistry method using tannin as a template. Silver nanoparticles were produced in silica mesopores by the reduction by the remaining tannin. After the removal of tannin, silica was coated with titania, which was transformed into anatase by annealing at 500°C. The obtained nanocomposite demonstrated high photocatalytic activity, which was enhanced by the combination of titania and nanosized silver.

中文翻译：

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以单宁为模板和还原剂合成的银纳米粒子在介孔二氧化硅上形成光催化活性二氧化钛

摘要

以绿色单宁为模板，通过绿色化学方法首次合成了整体的光学透明二氧化硅。通过减少剩余的单宁，在二氧化硅中孔中生成了银纳米颗粒。去除单宁后，用二氧化钛涂覆二氧化硅，并通过在500°C退火将其转化为锐钛矿。所获得的纳米复合材料表现出高的光催化活性，二氧化钛和纳米级银的组合增强了光催化活性。