光催化
材料科学
介孔材料
可见光谱
傅里叶变换红外光谱
漫反射红外傅里叶变换
带隙
兴奋剂
化学工程
核化学
光化学
催化作用
化学
有机化学
光电子学
工程类
作者
Sidra Bibi,Syed Sakhawat Shah,Fawad Muhammad,Muhammad Siddiq,Laraib Kiran,Samar A. Aldossari,Mohammed Sheikh Saleh Mushab,Shabnam Shahzad
出处
期刊:Chemosphere
[Elsevier]
日期:2023-10-01
卷期号:339: 139583-139583
被引量:19
标识
DOI:10.1016/j.chemosphere.2023.139583
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.
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