Study of synergistic effect of cobalt and carbon codoped with TiO2 photocatalyst for visible light induced degradation of phenol. (October 2022)

• Record Type: Journal Article
• Authors: Venkatesan, A.; Al-onazi, Wedad A.; Elshikh, Mohamed S.; Pham, Thi Huong; Suganya, S.; Boobas, S.; Priyadharsan, A.
• Is Part Of: Chemosphere. Volume 305(2022)
• Publication Date: 2022-10
• Subjects: Codoped TiO2 -- Phenol -- Visible light irradiation -- Photocatalyst -- Coprecipitation method; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.135333
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: In this work, we reported synthesis of cobalt and carbon codoped TiO2 (Co–C–TiO2 ) nanoparticles were prepared using co-precipitation technique. The synthesized catalysts are analyzed by various methods. The powder XRD pattern confirmed that all the samples were polycrystalline of anatase phase and particle size of resultant nanoparticle was reduced correlated with bare TiO2 sample. FTIR measurements exhibit the identification of functional groups present at the surface of TiO2 . FESEM micrograph showed that the shape of codoped TiO2 nanoparticles are approximately sphere. The attained energy gap of Co doped and C codoping of TiO2 modifies to a level below the energy gap of TiO2 anatase specifying a high capability to absorb visible light. The recombination rate of photo-induced electrons and holes for Co–C codoped TiO2 nanoparticles is significantly reduced. The synthesized samples are assessed in degradation of phenol by the illumination of visible light. The results confirmed that photocatalytic activity enhanced due to doping and codoping of Co and C. As a result, Co–C codoped TiO2 nanoparticles exhibited a higher visible-light photocatalytic activity in compared with Co–TiO2 and bare TiO2 with the maximum degradation efficiency of 98, 75 and 15%, respectively. And also, the reusability of the catalyst was proved when 95% degradation could be achieved after consecutive batches. It is predictable that this work will provide new insights to increase the visible light active photocatalysts for environmental problems. Graphical abstract: Image 1 Highlights: C codoped with TiO2 nanoparticles surface only strongly enhanced the photocatalytic performance. The prepared nanoparticles demonstrated very good morphology, improved optical response and crystallinity. Excellent crystallinity, surface morphology, improved optical response and outstanding stability. The as-synthesized nanoparticles also exhibited excellent photostability and re-usability. Phenol is effectively degraded under simulated visible light by the novel photocatalyst.