In:
ECS Journal of Solid State Science and Technology, The Electrochemical Society, Vol. 10, No. 5 ( 2021-05-01), p. 054009-
Abstract:
Tungsten oxide hydrate (WO 3 .H 2 O) nanoplates were in situ functionalized with AgNO 3 via a one-step acid precipitation method at room temperature. The functionalized product was the nanocomposite of Ag 2 WO 4 and WO 3 .H 2 O. Both pristine and functionalized samples had nanoplate morphology. The nanoplates’ dimension and uniformity decreased with the increase in the AgNO 3 amount, resulting in increased specific surface area. The AgNO 3 functionalization supported a growth via the orthorhombic WO 3 .H 2 O structure, caused a change in the dominant facet from (020) to (111), lessened the micro-strain, and enhanced the photocatalytic activity of samples under visible-light irradiation ( λ ≥ 450 nm). The samples functionalized with 5 mass % of AgNO 3 showed the highest methylene blue degradation efficiency of 49% and a degradation rate of 0.122 mg g −1 × min, which could be assigned to the largest specific surface area and the synergistic effect caused by the Ag 2 WO 4 @WO 3 .H 2 O junction. These results suggested a simple method for tailoring the dominant facet and morphology of WO 3 .H 2 O-based materials for visible-light-driven applications.
Type of Medium:
Online Resource
ISSN:
2162-8769
,
2162-8777
DOI:
10.1149/2162-8777/ac029a
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2021