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Controlled fabrication of hierarchical WO·HO hollow microspheres for enhanced visible light photocatalysis
Ist Teil von
RSC advances, 2015-02, Vol.5 (21), p.16376-16385
Erscheinungsjahr
2015
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
WO
3
·H
2
O nanostructures have been prepared through a facile hydrothermal route by controlling their morphology during synthesis. WO
3
·H
2
O nanoplates with a thickness of ∼45 nm and hierarchical hollow microspheres (HMSs) structures could be obtained by introducing different amounts of citric acid. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed to understand the structure and morphology of the two types of WO
3
·H
2
O. The formation mechanisms for WO
3
·H
2
O nanoplates and WO
3
·H
2
O HMSs were investigated. The photocatalytic activities, determined by rhodamine B (RhB) degradation under visible light irradiation of WO
3
·H
2
O HMSs photocatalysts, were significantly improved as compared with WO
3
·H
2
O nanoplates. The higher efficiency of photocatalytic activity in WO
3
·H
2
O HMSs was attributed to its higher surface-to-volume ratio and stability against aggregation. In addition, we investigated the toxicity of WO
3
·H
2
O HMSs against an important model fungus, yeast (
Saccharomyces cerevisiae
). The results indicate that the as-synthesized hierarchical WO
3
·H
2
O HMSs could be used as a green and efficient photocatalyst.
A new type of hierarchical WO
3
·H
2
O hollow microsphere, whose formation was successfully controlled based on the reaction system for preparing simple nanoplates, showed excellent photocatalytic activity for the degradation of dye under visible light.
Sprache
Englisch
Identifikatoren
eISSN: 2046-2069
DOI: 10.1039/c4ra14312d
Titel-ID: cdi_rsc_primary_c4ra14312d
Format
–
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