Organization of photoenergy conversion systems by using colloidal systems prepared by exfoliation of a layered semiconducting oxide

通过剥离层状铌酸盐制备了具有光催化活性的半导体氧化物纳米片胶体，并对其光化学功能进行了光能转换相关的三个反应：光诱导纳米片与电子受体之间的电荷分离、光诱导纳米片上的电子积累以及光催化水中析氢。粘土纳米片的加入对所有的反应都有很大的影响。特别是对于前一种反应，在适量的粘土的存在下，产物的产率和稳定性大大提高。结果表明，纳米片胶体可用于新型光能转换系统。

Nanosheet colloids of a photocatalytically active semiconducting oxide were prepared by exfoliation of layered niobate, and their photochemical functions were examined for three reactions related to photoenergy conversion : photoinduced charge separation between the nanosheet and an electron acceptor, photoinduced electron accumulation in the nanosheet, and photocatalytic hydrogen evolution from water. All of the reactions were largely affected by the addition of clay nanosheets. In particular, for the former reactions, yield and stability of the products greatly increased in the presence of an appropriate amount of clay. The results demonstrate that the nanosheet colloids can be applied to novel photoenergy conversion systems.