Improving natural sunlight photocatalytic efficiency of ZnO nanowires decorated by iron oxide cocatalyst via a simple drop method

Le Pivert，Marie1; Suo，Hongri2,3; Tang，Gang2,3; Qiao，Han2,3; Zhao，Zhicheng4; Martin，Nathan1; Liu，Chongxuan2,3; Leprince-Wang，Yamin1

2022

10.1016/j.matchemphys.2021.125304

MATERIALS CHEMISTRY AND PHYSICS   影响因子和分区

0254-0584

In this study, iron oxide cocatalysts were deposited on the surface of ZnO nanostructures by a simple “drop, evaporation, calcination” method. Different deposition concentrations were studied, allowing to extend the photocatalyst absorption spectral range from UV to visible light, improving the photocatalytic efficiency under natural sunlight. An optimal deposition concentration of 0.06% molar percentage of iron against zinc led to improve by 11% the Methyl Orange (MO) photocatalytic degradation after 5 h under natural sunlight. No iron leaching was detected by ICP-MS analysis after the water purification by photocatalysis. By studying the lifetime stability of the optimal sample under a powerful UV light source, no losses of photocatalytic efficiency were recorded after several degradation cycles. Nevertheless, under this powerful light source, photocorrosion damages were observed with two antagonistic effects: (1) no photocorrosion effect for the ZnO regions covered by iron oxide and (2) ZnO photocorrosion and an acceleration of the dissolution of the ZnO nanostructures in uncovered regions. Thus, we assume the electron/hole delocalisation, which is responsible of the photocatalytic activity improvement, is also the reason justifying the ZnO photocorrosion acceleration of uncovered part. The photocorrosion phenomena was observed only under the powerful UV light source, not under natural sunlight.

Cocatalyst Iron oxide Nanostructures Photocatalysis Water depollution Zinc oxide

SCI ; EI

英语

其他

WOS:000706946200004

20214010983813

Azo dyes ; Deposition ; Drops ; Efficiency ; II-VI semiconductors ; Iron oxides ; Light ; Light sources ; Molar ratio ; Nanostructures ; Photocatalytic activity

Semiconducting Materials:712.1 ; Light/Optics:741.1 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Production Engineering:913.1 ; Solid State Physics:933

MATERIALS SCIENCE

2-s2.0-85116252977

Scopus

1.ESYCOM,Univ Gustave Eiffel,CNRS (UMR 9007),Marne-la-Vallée,F-77454,France
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of the Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Foshan (Southern China) Institute for New Materials,Foshan,528200,China

Le Pivert，Marie,Suo，Hongri,Tang，Gang,et al. Improving natural sunlight photocatalytic efficiency of ZnO nanowires decorated by iron oxide cocatalyst via a simple drop method[J]. MATERIALS CHEMISTRY AND PHYSICS,2022,275.

Le Pivert，Marie.,Suo，Hongri.,Tang，Gang.,Qiao，Han.,Zhao，Zhicheng.,...&Leprince-Wang，Yamin.(2022).Improving natural sunlight photocatalytic efficiency of ZnO nanowires decorated by iron oxide cocatalyst via a simple drop method.MATERIALS CHEMISTRY AND PHYSICS,275.

Le Pivert，Marie,et al."Improving natural sunlight photocatalytic efficiency of ZnO nanowires decorated by iron oxide cocatalyst via a simple drop method".MATERIALS CHEMISTRY AND PHYSICS 275(2022).