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- Title
Ionic Liquid-Assisted Synthesis of Ag 3 PO 4 Spheres for Boosting Photodegradation Activity under Visible Light.
- Authors
Zhang, Beibei; Zhang, Lu; Zhang, Yulong; Liu, Chao; Xia, Jiexiang; Li, Huaming
- Abstract
In this work, a simple chemical precipitation method was employed to prepare spherical-like Ag3PO4 material (IL-Ag3PO4) with exposed {111} facet in the presence of reactive ionic liquid 1-butyl-3-methylimidazole dihydrogen phosphate ([Omim]H2PO4). The crystal structure, microstructure, optical properties, and visible-light photocatalytic performance of as-prepared materials were studied in detail. The addition of ionic liquids played a crucial role in forming spherical-like morphology of IL-Ag3PO4 sample. Compared with traditional Ag3PO4 material, the intensity ratio of {222}/{200} facets in XRD pattern of IL-Ag3PO4 was significantly enhanced, indicating the main {111} facets exposed on the surface of IL-Ag3PO4 sample. The presence of exposed {111} facet was advantageous for facilitating the charge carrier transfer and separation. The light-harvesting capacity of IL-Ag3PO4 was larger than that of Ag3PO4. The photocatalytic activity of samples was evaluated by degrading rhodamine B (RhB) and p-chlorophenol (4-CP) under visible light. The photodegradation efficiencies of IL-Ag3PO4 were 1.94 and 2.45 times higher than that of Ag3PO4 for RhB and 4-CP removal, respectively, attributing to a synergy from the exposed {111} facet and enhanced photoabsorption. Based on active species capturing experiments, holes (h+), and superoxide radical (•O2−) were the main active species for visible-light-driven RhB photodegradation. This study will provide a promising prospect for designing and synthesizing ionic liquid-assisted photocatalysts with a high efficiency.
- Subjects
VISIBLE spectra; PHOTODEGRADATION; PHOTOCATALYSTS; RHODAMINE B; CHARGE transfer; SILVER phosphates; IONIC liquids
- Publication
Catalysts (2073-4344), 2021, Vol 11, Issue 7, p788
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal11070788