Photocatalytic and Antimicrobial Properties of [AgTiO2]:[Clay] Nanocomposite Prepared with Clay Different Ratios
Open Access
- 1 January 2020
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in Modern Research in Catalysis
- Vol. 09 (04), 47-61
- https://doi.org/10.4236/mrc.2020.94004
Abstract
This work aimed to synthesis a novel material that would be able to efficiently remove both organic and microbiological pollutants from wastewater. Through the hydrothermal process, we first doped titanium dioxide, a semiconductor possessing excellent photocatalytic properties with silver nanoparticles having good antibacterial properties. The obtained material was then associated with clay known for its good adsorbent properties to form [AgTiO2]:[clay] type nanocomposites. The different mass composition of [AgTiO2]:[clay] considered in this work were 1:1; 1:0.5; 1:0.1; 1:0.05 and 1:0.01. The prepared nanocomposites were characterized by means of XRD, FTIR and SEM techniques. Results revealed the presence of TiO2 anatase and Ag on the surface of the clay mainly composed of kaolinite and quartz. The photocatalytic activities of the nanocomposites were tested in the presence of synthetic Orange II (25 mg/L) wastewater under visible light irradiation. The experiments demonstrated that organic pollutants were effectively photodegraded when the proportion of clay in the mixture (AgTiO2)-(Clay) was inferior or equaled to 50%. The use of commercial TiO2, for comparison purpose, showed a lower degradation efficiency of the Orange II solution (η 2]:[clay] were also assessed in the presence of two types of bacteria E. coli (Gram negative) and S. aureus (Gram positive). The antibacterial activities of the nanocomposites were characterized with and without UV irradiation. In dark conditions, the antibacterial activities of nanocomposites (AgTiO2)-(Clay) against S. aureus gradually increased with increasing the clay amount. Under visible light irradiation, the nanocomposites showed a significant antimicrobial activity against E. coli and S. aureus.Keywords
This publication has 32 references indexed in Scilit:
- “Nanoantibiotics”: A new paradigm for treating infectious diseases using nanomaterials in the antibiotics resistant eraJournal of Controlled Release, 2011
- Synthesis of Ag–TiO2composite nano thin film for antimicrobial applicationNanotechnology, 2011
- Biomolecule-controlled hydrothermal synthesis of C–N–S-tridoped TiO2 nanocrystalline photocatalysts for NO removal under simulated solar light irradiationJournal of Hazardous Materials, 2009
- Adsorption and visible-light-derived photocatalytic kinetics of organic dye on Co-doped titania nanotubes prepared by hydrothermal synthesisSeparation and Purification Technology, 2009
- Silver nanoparticles as a new generation of antimicrobialsBiotechnology Advances, 2009
- Effect of tantalum addition on anatase phase stability and photoactivity of aqueous sol–gel derived mesoporous titaniaJournal of Molecular Catalysis A: Chemical, 2007
- Influence of metallic species on TiO2 for the photocatalytic degradation of dyes and dye intermediatesJournal of Photochemistry and Photobiology A: Chemistry, 2003
- Titanium dioxide photocatalysisJournal of Photochemistry and Photobiology C: Photochemistry Reviews, 2000
- An overview of semiconductor photocatalysisJournal of Photochemistry and Photobiology A: Chemistry, 1997
- Photochemical processes for water treatmentChemical Reviews, 1993