期刊
CERAMICS INTERNATIONAL
卷 47, 期 5, 页码 5929-5937出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.11.064
关键词
Co-precipitation; Binary metal-doped; Nanocatalyst; Band-gap; Photocatalyst
资金
- King Saud University [IFKSURG-312]
In this study, binary transition metal (Ce and Zn) doped CuO nanocatalyst was successfully fabricated through a facile co-precipitation technique. The doped sample exhibited significantly higher removal efficiency for MB dye compared to the pristine CuO sample, attributed to its higher surface area and tuned band-gap. The superior adsorption and degradation aptitude of the doped sample were also supported by a higher rate constant in the degradation process.
Herein, we fabricated the binary transition metal (Ce & Zn) doped CuO nanocatalyst via a single step facile co precipitation technique by using liquid ammonia as a pH regulator and precipitating agent. The structural, morphological, and compositional studies of the fabricated samples were completed via X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and EDX techniques, respectively. The impact of binary metal-doped CuO nanocatalyst on the optical band-gap was examined via the UV-Visible spectroscopic technique. The photocatalytic aptitude of the fabricated pristine and binary metal-doped CuO nanocatalyst was examined against the 5-ppm aqueous solution of MB dye. The obtained results revealed that the doped sample removes 81.64% MB dye, via adsorption (32.65%) and degradation (48.99%) processes, while in comparison the pristine CuO sample removes just 38.77%. The superior adsorption and degradation aptitude of the binary metal doped sample can be ascribed to its higher surface area and tuned band-gap, respectively. Moreover, the kinetic study of the degradation process also displayed that the doped sample degrades the MB dye with a higher value of the rate constant (0.0137 min(-1)) than that of pristine CuO photocatalyst (0.0049 min(-1)). The tuned band-gap and nanoarchitecture morphology of the doped CuO not only facilitate the excitation process but also assist in the transportation of the photo-induced species towards the surface of the photocatalyst. The observed superior photocatalytic activity of the binary metal-doped CuO photocatalyst showed its exceptional aptitude for the treatment of toxic industrial effluents.
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