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Synthesis of vertical WO3 nanoarrays with different morphologies using the same protocol for enhanced photocatalytic and photoelectrocatalytic performances.

ABSTRACT: Tungsten trioxide (WO3) nanoarrays with different morphologies were successfully synthesized by a hydrothermal method on an FTO substrate. Various nanostructures of WO3 including nanoflakes, nanoplates, nanoflowers and nanorods were obtained by adjusting only the acidity of the precursor solution. XRD patterns confirmed that the as-prepared orthorhombic WO3·0.33H2O transformed to the monoclinic WO3 phase under annealing at 500 °C. UV-Vis absorbance spectroscopy indicated that the absorption edge of WO3 nanoflowers exhibited a slight red-shift compared to other morphologies of WO3. The obtained WO3 nanoflower arrays exhibit the highest photocurrent density and photocatalytic degradation activity towards methylene blue. Finally, the mechanism of the photocatalytic degradation of methylene blue by WO3 is discussed.

SUBMITTER: Li J 

PROVIDER: S-EPMC9036611 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Synthesis of vertical WO<sub>3</sub> nanoarrays with different morphologies using the same protocol for enhanced photocatalytic and photoelectrocatalytic performances.

Li Jingjing J   Guo Chenpeng C   Li Lihua L   Gu Yongjun Y   Kim BoK-Hee BH   Huang Jinliang J  

RSC advances 20210706 38

Tungsten trioxide (WO<sub>3</sub>) nanoarrays with different morphologies were successfully synthesized by a hydrothermal method on an FTO substrate. Various nanostructures of WO<sub>3</sub> including nanoflakes, nanoplates, nanoflowers and nanorods were obtained by adjusting only the acidity of the precursor solution. XRD patterns confirmed that the as-prepared orthorhombic WO<sub>3</sub>·0.33H<sub>2</sub>O transformed to the monoclinic WO<sub>3</sub> phase under annealing at 500 °C. UV-Vis abs  ...[more]

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