Cu-doped mesoporous TiO2 photocatalyst for efficient degradation of organic dye via visible light photocatalysis

被引：38

作者：

Bibi S. ^{[1
]}

Shah S.S. ^{[1
]}

Muhammad F. ^{[2
]}

Siddiq M. ^{[1
]}

Kiran L. ^{[1
]}

Aldossari S.A. ^{[3
]}

Sheikh Saleh Mushab M. ^{[3
]}

Sarwar S. ^{[4
]}

机构：

[1] Chemistry Department, Quaid-i-Azam University, Islamabad

[2] Shandong Provincial Key Lab for Preparation and Measurement of Building Materials, University of Jinan, Shandong, Jinan

[3] Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh

[4] Institute de Biology en Sante, University of Angers, 4 Rue Larrey, Angers

来源：

Chemosphere | 2023年 / 339卷

关键词：

Bioreactor; Cu-doped TiO[!sub]2[!/sub; Environmental remediation; mesoporous membrane;

D O I：

10.1016/j.chemosphere.2023.139583

中图分类号：

学科分类号：

摘要：

A solvothermal method was used to synthesize the mesoporous TiO2, (1-3w %) Cu-doped mesoporous TiO2 membrane with the help of a bioreactor. To understand the physicochemical composition of all synthesized nanomaterials, the structure, morphology and crystallinity of the materials were studied using X-ray diffractometer (XRD), Field emission scanning electron microscopy (FESEM), Fourier transform-infrared (FTIR), Energy dispersive X-ray spectroscopy (EDS) and cyclic voltammetry (CV). Under artificial light source (500 W mercury bulb) irradiations, the nano catalysts' catalytic effectiveness was examined for the azo dyes, namely Congo red. Cu-doping causes a shift in the light absorption of mTiO2 from the ultraviolet to the visible region. The 3w% Cu-doped mTiO2 photocatalyst exhibits lower band gap energy (2.6eV) than TiO2 which is 3.2 eV to efficiently utilize solar energy. As a result, the light absorption was shifted towards the visible spectrum. The recommended mTiO2 and (1, 2, 3) w% Cu-doped mTiO2 photocatalysts were used to photodegrade Congo red and methylene blue. For the degradation of CR, the mTiO2 photocatalyst exhibited 61% and 3w% Cu-doped mTiO2 demonstrated 99% photocatalytic performance after 50 min. A variety of scavengers were also utilized to distinguish the active species by catching the radicals and holes created during the process of photocatalytic degradation. CV indicates the presence of Cu2+ and Cu1+ in Cu-doped mTiO2. Oxygen vacancies and the electronegative surface of Cu1+ seem to perform the photocatalytic reduction of CR. © 2023 Elsevier Ltd

引用

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