New age monolithic design-based visible light responsive and reusable photocatalyst material using iron oxide-modified mesoporous titania framework

In this work, we report a facile route for the synthesis of worm-like mesoporous Fe 2 O 3 -doped TiO 2 monolithic composites through a direct template sol–gel method, for the photocatalytic degradation of textile dye (acid blue 113) pollutants. The monolith surface morphology and structural properti...

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Bibliographic Details
Published in:Bulletin of materials science 2020-12, Vol.43 (1), p.84, Article 84
Main Authors: Kumar, S Naveen, James, Vivek, James, Vineeth, Maheswari, M Akhila, Sivaraman, N, Rao, C V S Brahmananda, Prabhakaran, D
Format: Article
Language:English
Subjects:
Acids
Catalytic activity
Chemistry and Materials Science
Composite materials
Doppler effect
Dyes
Electromagnetic absorption
Electrons
Energy bands
Energy gap
Engineering
Environmental restoration
Iron oxides
Light
Luminous intensity
Materials Science
Morphology
Nanoparticles
Oxidation
Photocatalysis
Photocatalysts
Photodegradation
Pollutants
Red shift
Sol-gel processes
Stoichiometry
Titanium dioxide
Water purification
X ray photoelectron spectroscopy
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Summary:In this work, we report a facile route for the synthesis of worm-like mesoporous Fe 2 O 3 -doped TiO 2 monolithic composites through a direct template sol–gel method, for the photocatalytic degradation of textile dye (acid blue 113) pollutants. The monolith surface morphology and structural properties have been characterized using p-XRD, HR-SEM–EDAX, HR-TEM–SAED, TGA, UV–Vis–DRS, PLS, FTIR, XPS and BET analyses. The stoichiometric doping of Fe 2 O 3 unleashes visible light photocatalytic activity through a red shift in the light absorption character of TiO 2 , thereby narrowing the energy band gap, and an eventual increase in e - / h + separation centres. The monolithic photocatalyst exhibits better properties in terms of surface area, pore volume and diameter. The physico-chemical parameters, such as solution pH, dopant stoichiometry, catalyst quantity, dye concentration, photo-sensitizers and light intensity have been optimized to enhance the photocatalysis efficiency. The photocatalyst exhibits complete dye mineralization within 0.5 h, and also reusable for five continuous cycles. Graphic Abstract
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-020-2040-9