RSC Advances p. 23526 - 23534 (2019)
Update date:2022-08-10
Topics:
Nguyen, Trinh Duy
Bui, Quynh Thi Phuong
Le, Tien Bao
Altahtamouni
Vu, Khanh Bao
Vo, Dai-Viet N.
Le, Nhan Thi Hong
Luu, Tuan Duy
Hong, Seong Soo
Lim, Kwon Taek
We investigated the fabrication of Co-doped BiVO4 (Bi1-xCoxVO4+δ, 0.05 < x < 0.5) by the substitution of Co ions for Bi sites in BiVO4. The X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS) results indicated that the substitution of Co2+ ions for Bi3+ sites in BiVO4 was successful, although a change in the crystal phase of BiVO4 did not occur. UV-vis DRS and PL results suggested that the Co-incorporation could slightly improve the visible light absorption of BiVO4 and induce the separation of photoinduced electron-hole pairs; therefore, a significant enhancement of photocatalytic performance was achieved. The Bi0.8Co0.2VO4+δ sample showed superior photocatalytic activity in comparison with other samples, achieving 96.78% methylene blue (MB) removal within 180 min. In addition, the proposed mechanism of improved photocatalytic activities and the stability of the catalyst were also investigated.
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