Ultra-Efficient Photocatalytic Properties in Porous Tungsten Oxide/Graphene Film under Visible Light Irradiation.

Lin Mei,Bingan Lu,Haitao Zhao

doi:10.1002/advs.201500116

Abstract

Recently, a growing amount of effort has been devoted to solving the widespread problem of pollution. Photocatalysts have attracted increasing attention for their widespread environmental applications. Here, a classic and simple electrospun technique is used to directly fabricate a porous a tungsten oxide nanoframework with graphene film as a photocatalyst for degradation of pollutants. The as‐synthesized film simultaneously possesses substantial adsorptivity of aromatic molecules, extensive light absorption range, significant light trapping, and efficient charge carrier separation properties, which remarkably enhance photocatalytic activity. In the photodegradation of Rhodamine B, a significant photocatalytic enhancement in the reaction rate is observed, which has superior photocatalytic activity compared to other bare WO3 and TiO2 nanomaterials under visible‐light irradiation.

Highlights

Introduction presentWO3 composites, such as the marked decrease of the adsorptivity during photodegradation, the weakening ofFor the sustainable development of human society, the devel- the light intensity arriving at catalysts’ surface, and the high opment of both pollution-free technologies for environmental electron-hole recombination rate, etc
Nanomaterials using as photocatacatalysis has emerged as one of the most promising technolo- lysts are powder, which resulted in improved photocatalytic gies because it represents an easy way to utilize the energy of activity (Table 1)
As demonstrated in the present case study, in the GWF, i) plentiful www.advancedscience.com exposed graphene nanosheets can great adsorb Rhodamine B (RhB) molecules via π–π stacking, ii) ultra-efficient utilization rate of visible-light irradiation resulting from a multi reflection effect of porous structures, iii) the reduced recombination rate of electrons and holes, and iv) 2D film structure can suitable for adsorption of RhB molecules and charge carriers transportation

Summary

Introduction

Introduction presentWO3 composites, such as the marked decrease of the adsorptivity during photodegradation, the weakening ofFor the sustainable development of human society, the devel- the light intensity arriving at catalysts’ surface, and the high opment of both pollution-free technologies for environmental electron-hole recombination rate, etc. Compared with GWF, we synthesized the WO3 nanofibers without graphene nanosheets as shown in Figure S1 (Supporting Information).

Results

Conclusion