Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 579, Issue -, Pages 754-765Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.06.126
Keywords
Hollow hierarchical structures; Z-scheme photocatalyst; Antibiotics degradation; Organic dyes degradation; Visible-light photocatalysis
Categories
Funding
- National Natural Science Foundation of China [21864023, 21761031]
- Gansu Provincial Natural Science Foundation of China [18JR3RA087]
- Young Teacher Research Foundation of Northwest Normal University [NWNU-LKQN-16-9]
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Controllable fabrication of nanomaterials with hierarchical architecture have received much attention in the field of photocatalysis due to their enhanced light-harvesting efficiency. Moreover, fabricating direct Z-scheme heterojunctions have been proven to be effective way to enhance the photocatalytic performance of photocatalysts. Herein, hierarchically hollow WO3 nanoflower was successfully synthesized by a simple hydrothermal treatment of tungsten chloride (WCl6) in ethanol solution. Decoration of the obtained WO3 with AgI nanoparticles in situ can form the Z-scheme AgI/WO3 hollow hierarchical nanoflowers (AgI/WO3 HHNFs). The AgI/WO3 HHNFs exhibited excellent photocatalytic activity and remarkable stability for the degradation of tetracycline hydrochloride (TC-HCI) and Eosin B (EB) under the irradiation of a low energy consume light (LED lamp, 5 W). Interestingly, compared to pure AgI nanoparticles, 3D hollow WO3 nanoflowers and AgI/WO3 nanosheets, the AgI/WO3 HHNFs revealed conspicuously enhanced photocatalytic activity. This phenomenon could be associated to three aspects, namely the high light-harvesting efficiency, increased light trapping and scattering capability and strongly coupled Z-scheme heterointerface, which effectively improved the photoelectron-hole sepreation efficiency. Our work therefore provide a novel insight for the fabrication of 3D hollow hierarchical structures. (C) 2020 Elsevier Inc. All rights reserved.
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