The article reports on the facile one-pot synthesis of a structurally organized mesoporous crack-free monolithic
network of Bi³⁺ doped TiO₂, as a visible light workable photocatalyst materials for environmental remediation.
The monolithic photocatalyst efficacy has been investigated using Acid Blue 113, an organic textile dye as the
model organic pollutant, thereby rooting its decontamination potential towards dye effluents from textile and dye
industries. The controlled stoichiometric surface doping of Bi3+ with the continuous framework of the TiO2
monolithic material not only ensures visible light-induced photocatalysis but also high quantum yield upon light
impingement thereby leading a rapid generation of reactive radical species. The monolith structural properties and
its morphology are characterized using transmission electron microscopy (TEM), scanning electron microscopy
(SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), selected area electron diffraction (SAED),
energy dispersive X-ray spectrometry (EDAX), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy
(PLS), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and N₂ adsorption-
desorption isotherm analysis. The anatase phase TiO₂ monolith offers a high surface area that promotes
the voluminous generation of photo-induced e⁻/h⁺ pairs that proceed towards the formation of reactive radical
intermediates for the fast dissipation of pollutants. To valid the efficiency and effectiveness of the Bi³⁺ doped TiO2
monolith photocatalyst, a comprehensive study on the physicochemical parameters such as solution pH, dopant
stoichiometry, photocatalyst quantity, light intensity, photosensitizers, and reusability, proves crucial. The results
reveal that under optimized conditions, the photocatalyst has an ultra-fast response time of ≤0.2 h for complete
mineralization, with 0.06 g of monolithic photocatalysts that are recoverable and reusable.