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Two-dimensional assembly structure of graphene and TiO2 nanosheets from titanic acid with enhanced visible-light photocatalytic
Release time:2021-11-02    Views:857

RongHaoaShienGuoaXiuwenWangaTongFengbQingmaoFengaMingxiaLiaBaojiangJianga


Abstract

The titanic acid sheets were prepared by one-step hydrazine hydrate-assisted hydrothermal process. Then the reduced graphite oxide (rGO)@TiO2 nanosheet composites were finally obtained through ultrasonic exfoliation and following calcination treatment process. rGO@TiO2 nanosheet composites show excellent hydrogen production performance under AM1.5 light source. The highest hydrogen evolution yield (923.23 μmol) is nearly two times higher than that of pure TiO2, mainly due to the special electron structure and more active sites for TiO2 nanosheet. The introduction of graphene could improve the TiO2 nanosheet stability and extend visible-light absorption range.

Photocatalytic hydrogen productioin performance evaluation 

The photocatalytic hydrogen production measurements were conducted in an online photocatalytic hydrogen production system(Aulight, Beijing CEL-SPH2N) at ambient temperature (20℃). The catalyst (50mg) suspended in a mixture of distilled water(80ml) and methanol(20ml) in the reaction cell under magnetic stirring.




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