Coupling of nano-spinel MgFe2O4 on Co3O4 for heterogeneous photocatalysis and antibacterial applications: Insights of optoelectrical properties

The binary heterojunction of MgFe2O4-Co3O4 nano-photocatalyst was constructed by sonochemical method. HRTEM represented the attachment of MgFe2O4 and Co3O4. UV–vis DRS reveals the bandgap shift (MgFe2O4 = 1.75 eV; Co3O4 = 2.35 eV) to 2.09 eV for MgFe2O4-Co3O4 that promoted white light harvesting. XP...

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Bibliographic Details
Published inColloid and interface science communications Vol. 44; p. 100467
Main Authors Syed, Asad, Elgorban, Abdallah M., Bahkali, Ali H., Zaghloul, Nouf S.S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2021
Subjects
Antibacterial activity
MgFe2O4-Co3O4
Nanoheterostructure
Photocatalyst
Antibacterial activity
MgFe2O4-Co3O4
Photocatalyst
Nanoheterostructure
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Summary:The binary heterojunction of MgFe2O4-Co3O4 nano-photocatalyst was constructed by sonochemical method. HRTEM represented the attachment of MgFe2O4 and Co3O4. UV–vis DRS reveals the bandgap shift (MgFe2O4 = 1.75 eV; Co3O4 = 2.35 eV) to 2.09 eV for MgFe2O4-Co3O4 that promoted white light harvesting. XPS and EDAX were performed to confirm the presence of Mg, Fe, Co and O. FTIR analysis indicates the tetrahedral and octahedral oxygen-metal peaks. The dye degradation rate of MgFe2O4-Co3O4 was boosted 7 and 11 times than MgFe2O4 and Co3O4 respectively. The MgFe2O4-Co3O4 showed excellent recycling stability and reusability. The particles found to be highly active under visible light irradiation and ·OH showed major contribution in dye degradation. The MgFe2O4-Co3O4 greatly affected the growth of Escherichia coli and Bacillus subtilis that proved its excellent antibacterial property. Therefore, MgFe2O4 decorated Co3O4 can be considered as a useful tool for multiple applications including environmental remediation by photocatalysis and as antibacterial agents. Schematic representation of photocatalytic mechanism of MgFe2O4-Co3O4. [Display omitted] •Nano-spinel MgFe2O4 decorated Co3O4 was prepared by sono-chemical assisted method.•The photocatalytic efficiency of MgFe2O4-Co3O4 was enhanced 11 times than Co3O4.•The ·OH radical plays key role in dye degradation.•MgFe2O4-Co3O4 exhibited excellent antibacterial activity against Escherichia coli and Bacillus subtilis.
ISSN:2215-0382
2215-0382
DOI:10.1016/j.colcom.2021.100467