Highly effective Fe-doped TiO2 nanoparticles for removal of toxic organic dyes under visible light illumination. (11th June 2023)

• Record Type: Journal Article
• Authors: Rahman, Kazi Hasibur; Kar, Asit Kumar; Chen, Kuan-Chung; Chen, Ching-Jung
• Is Part Of: Nanotechnology. Volume 34:Number 24(2023)
• Publication Date: 2023-06-11
• Subjects: visible light photocatalysis -- dye degradation -- Schottky barrier -- characterizations -- waste water treatment -- stability; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/acc407
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: This article addresses the synthesis of Fe 3+ doped TiO2 nanoparticles with variations of molar concentrations of Fe 3+ and their adequate use as potential photocatalysts for Photocatalysis applications. Synthesized photocatalysts were characterized thoroughly by different analytical techniques in terms of morphological, chemical, structural, crystalline, optical, electronic structure, surface area etc properties. The occurrence of red shift phenomenon of the energy band gap attributes to the transfer of charges and transition between the d electrons of dopant and conduction band (CB) or valence band (VB) of TiO2 . The doping of Fe 3+ ions generates more trap sites for charge carriers with the surface trap sites. Thorough experimental conclusions revealed that the Fe 3+ ions necessarily regulate the catalytic property of TiO2 nanomaterial. The obtained total degradation efficiency rate of Methylene Blue (MB) was 93.3% in the presence of 0.1 M Fe 3+ in the host material and for Malachite Green Oxalate the efficiency was 100% in the presence of 0.05 M and 0.1 M Fe 3+ in the host material. In both the cases the total visible light irradiation time was 90 min. The adsorption properties of the photocatalysts have been also performed in a dark for 90 min in the presence of MB dye. However, till now there are hardly reported photocatalysts which shows complete degradation of these toxic organic dyes by visible light driven photocatalysis. of potential values of valence and conduction band shows the production of active oxidizing species for hydrogen yield and the possible mechanism of the Schottky barrier has been proposed. A schematic diagram of visible light driven Photocatalysis has been pictured showing degradation activity of Fe 3+ -TiO2 catalysts sample.