Carbon-based TiO2-x heterostructure nanocomposites for enhanced photocatalytic degradation of dye molecules. Issue 7 (1st April 2021)

• Record Type: Journal Article
• Authors: Sriramoju, Jagadeesh Babu; Muniyappa, Murthy; Marilingaiah, Navya Rani; Sabbanahalli, Chetana; Shetty, Manjunath; Mudike, Ravi; C.P, Chitrabanu; Shivaramu, Prasanna D.; G, Nagaraju; Rangappa, Kanchugarakoppal S.; C.S, Ananda Kumar; Rangappa, Dinesh
• Is Part Of: Ceramics international. Volume 47:Issue 7(2021)Part B
• Page Start: 10314
• Page End: 10321
• Publication Date: 2021-04-01
• Subjects: Brown TiO2, TiO2-x -- Oxygen vacancies -- Photocatalytic dye degradation -- Rosebengal -- Carbon-based TiO2-x nanocomposites -- Photocatalyst; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.12.014
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Application of brown titanium dioxide (TiO2-x ) and its modified composite forms in the photocatalytic decomposition of organic pollutants in the environment is a promising way to provide solutions for environmental redemption. Herein, we report the synthesis of effective and stable TiO2-x nanoparticles with g-C3 N4, RGO, and multiwalled carbon nanotubes (CNTs) using a simple hydrothermal method. Among all the as-synthesized samples, excellent photocatalytic degradation activity was observed for RGO-TiO2-x nanocomposite with high rate constants of 0.075 min −1, 0.083 min −1 and 0.093 min −1 for methylene blue, rhodamine-B, and rosebengal dyes under UV–Visible light irradiation, respectively. The altered bandgap (1.8 eV) and the large surface area of RGO-TiO2-x nanocomposite impacts on both absorption of visible light and efficiency of photogenerated charge electron (e − )/hole (h + ) pair separation. This resulted in enhanced photocatalytic property of carbon-based TiO2-x nanocomposites. A systematic study on the influence of different carbon nanostructures on the photocatalytic activity of brown TiO2-x is carried out.