Enhanced photocatalytic and antifungal activity of hydroxyapatite/alpha-AgVO3 composites

Author(s)

da Silva, Jussara S. ^[1] ; Machado, Thales R. ^[1] ; Trench, Aline B. ^[1] ; Silva, Airton D. ^[1] ; Teodoro, Vinicius ^[1] ; Vieira, Paulo C. ^{[1, 2]} ; Martins, Tiago A. ^[1] ; Longo, Elson ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Dept Phys & Chem, BR-14040903 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Materials Chemistry and Physics; v. 252, SEP 15 2020.
• Web of Science Citations: 1

Abstract

Hydroxyapatite/alpha-silver vanadate (HA/alpha-AgVO3) composites for fungi growth inhibition and photocatalytic discoloration of organic compounds were synthesized by chemical precipitation. The structural and morphological characterization of the 7.5 and 22.5 wt% HA/alpha-AgVO3 composites revealed HA nanomds with hexagonal crystalline structure successfully deposited on alpha-AgVO3 microrods with monoclinic structure. Under UV light illumination, the 22.5 wt% HA/alpha-AgVO(3 )sample exhibited the highest photocatalytic activity (85%) within 60 min on the discoloration of methylene blue. A mechanism for this property is herein presented, where the main responsible for the potentialized photoactivity was the charge accumulation at the alpha-AgVO3 band structure. Moreover, HA/alpha-AgVO3 composites exhibited fungistatic activity against Fusarium guttiforme and Colletotrichum horii, evidencing successful preparation of multifunctional materials. (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