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Nano-Structuration of WO 3 Nanoleaves by Localized Hydrolysis of an Organometallic Zn Precursor: Application to Photocatalytic NO 2 Abatement.
- Source :
- Nanomaterials (2079-4991); Dec2022, Vol. 12 Issue 24, p4360, 20p
- Publication Year :
- 2022
-
Abstract
- WO<subscript>3</subscript> is a known photocatalytic metal oxide frequently studied for its depollution properties. However, it suffers from a high recombination rate of the photogenerated electron/holes pair that is detrimental to its performance. In this paper, we present a new chemical method to decorate WO<subscript>3</subscript> nanoleaves (NLs) with a complementary metal oxide (ZnWO<subscript>4</subscript>) in order to improve the photocatalytic performance of the composite material for the abatement of 400 ppb NO<subscript>2</subscript> under mild UV exposure. Our strategy was to synthesize WO<subscript>3</subscript>·2H<subscript>2</subscript>O nanoleaves, then, to expose them, in water-free organic solution, to an organometallic precursor of Zn(Cy)<subscript>2</subscript>. A structural water molecule from WO<subscript>3</subscript>·2H<subscript>2</subscript>O spontaneously decomposes Zn(Cy)<subscript>2</subscript> and induces the formation of the ZnO@WO<subscript>3</subscript>·H<subscript>2</subscript>O nanocomposite. The material was characterized by electronic microscopy (SEM, TEM), TGA, XRD, Raman and solid NMR spectroscopies. A simple thermal treatment under air at 500 °C affords the ZnWO<subscript>4</subscript>@WO<subscript>3</subscript> nanocomposite. The resulting material, additionally decorated with 1% wt. Au, presents a remarkable increase (+166%) in the photocatalytic abatement of NO<subscript>2</subscript> under UV compared to the pristine WO<subscript>3</subscript> NLs. This synthesis method paves the way to the versatile preparation of a wide range of MOx@WO<subscript>3</subscript> nanocomposites (MOx = metal oxide). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 12
- Issue :
- 24
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 161039298
- Full Text :
- https://doi.org/10.3390/nano12244360