Enhanced photocatalytic activity of CaMoO4/g-C3N4 composites obtained via sonochemistry synthesis

Author(s)

Santiago, Anderson A. G. ^[1] ; Macedo, Elida M. ^[1] ; Oliveira, Fernanda K. F. ^[1] ; Tranquilin, Ricardo L. ^[2] ; Teodoro, Marcio D. ^[3] ; Longo, Elson ^[2] ; Motta, V, Fabiana ; Bomio, Mauricio R. D. ^[4]

Affiliation

^[1] Fed Univ Rio Grande do Norte UFRN, Dept Mat Engn, LSQM Lab Chem Synth Mat, POB 1524, Natal, RN - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil

^[4] Motta, Fabiana, V, Fed Univ Rio Grande do Norte UFRN, Dept Mat Engn, LSQM Lab Chem Synth Mat, POB 1524, Natal, RN - Brazil

• Document type: Journal article
• Source: Materials Research Bulletin; v. 146, FEB 2022.
• Web of Science Citations: 0

Abstract

Herein, CaMoO4-based g-C3N4 composites are successfully synthesized by the sonochemistry method. All samples present photocatalytic activity under UV-light irradiation by employing methylene blue (MB). The structural analysis is available through X-ray diffraction (XRD), Raman, and FTIR spectroscopies, which verified a scheelite-type tetragonal structure for CaMoO4 with slight distortion in {[}MoO4] clusters between samples and confirmation of g-C3N4 presence in the powder. FEG-SEM images reveal a higher formation of interfaces between CaMoO4 and g-C3N4 particles. Photoluminescence spectra are measured to study the photogenerated charge recombination process. Furthermore, the studies show that increased dosage of g-C3N4 onto the composite provides up to 95.1% of MB discoloration in 180 min, while CaMoO4 without g-C3N4 only provides 40.2%. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC