Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003311 | Separation and Purification Technology | 2019 | 12 Pages |
Abstract
A series of p-n junction Ag2O/g-C3N4 photocatalysts with different Ag2O contents were successfully prepared though a facile chemical precipitation method at room temperature. The as-synthesized samples were characterized in detail by XRD, EDS, XPS, SEM and DRS. The experimental results demonstrated that Ag2O nanoparticles were well distributed on the surface of g-C3N4 and the heterostructure of Ag2O/g-C3N4 was constructed. As-synthesized Ag2O/g-C3N4 heterojunction photocatalysts exhibited an excellent wide-spectrum response ranging from ultraviolet (UV) to near-infrared (NIR), indicating its potential for effective utilization of solar light energy. The as-prepared Ag2O/g-C3N4 shows excellent photocatalytic properties for the degradation of Rhodamine B (RhB), phenol, imidacloprid, methylene blue (MB) and methyl orange (MO) under visible and NIR light irradiation. The degradation rate constants of Ag2O/g-C3N4 (8:1) for RhB were 0.05188 and 0.01368â¯minâ1 under visible and NIR irradiation, which are about 26 and 343 times higher than that of pure g-C3N4, respectively, and are even better than that of Ag2O under the same conditions. The enhanced photochemical activities are attributed to the formation of the heterostructure between Ag2O and g-C3N4, and efficient charge separation efficiency. Finally, a possible photocatalytic mechanism was proposed for this photocatalyst.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Shuhui Liang, Dafeng Zhang, Xipeng Pu, Xintong Yao, Ruoting Han, Jie Yin, Xiaozhen Ren,