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Journal of Alloys and Compounds

Journal of Alloys and Compounds

IF: 5.79
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Optimize the preparation process of m-TiO2@ CdS by response surface methodology to enhance the light intensity adaptability of photocatalytic degradation of?…

Published:5 December 2024 DOI: 10.1016/j.jallcom.2024.177979
Lizhe Ma, Zhihong Zhang, Jieli Duan, Jin Li, Qingyuan Lin, Yinlong Jiang, Kefu Zhu, Zhiyong Fang, Bang Ji, Zhou Yang

Abstract

Catalyst performance is traditionally evaluated under high light intensity, where variations in e--h+ pair recombination rates at different light intensities may limit the applicability of the selected catalyst to diverse light sources. Response surface methodology (RSM) was employed to compare catalyst performance under two optimization processes, using tetracycline degradation rate and photon flux as response variables. The m-TiO2@CdS catalyst was characterized by XRD, SEM, TEM, XPS, and UV-Vis-DRS, and its preparation process was optimized using RSM, with precursor ratio, hydrothermal time, and temperature as variables. The proposed optimization model for tetracycline degradation rate and photon flux exhibited a strong correlation between predicted and experimental results. The tetracycline degradation rates for the two optimized preparation processes were nearly identical, at 61.87% and 61.18%, respectively. A comparison of tetracycline degradation kinetics under different light conditions (light saturation and non-saturation) for the two optimized m-TiO2@CdS samples demonstrated that the photon flux-based optimization model offered greater adaptability across a wider range of light intensities. Additionally, the repeatability of m-TiO2@CdS prepared under the optimal conditions was assessed, and a plausible mechanism for its photocatalytic degradation of tetracycline was proposed.

Substances (8)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Isopropyl alcohol 67-63-0 C3H8O 1647 suppliers $7050.00
Ethylene glycol 107-21-1 C2H6O2 1399 suppliers $10.00-$908.54
Potassium chloride 7447-40-7 KCl 1310 suppliers $6.00-$11230.00
L-Cysteine 52-90-4 C3H7NO2S 1084 suppliers $6.00-$15643.00
Tetracycline hydrochloride 64-75-5 C22H25ClN2O8 565 suppliers $22.40-$2360.94
1,4-Benzoquinone 106-51-4 C6H4O2 555 suppliers $10.00-$7780.00
Sodium oxalate 62-76-0 C2Na2O4 464 suppliers $6.00-$1106.56
Titanium tetraisopropanolate 546-68-9 C12H28O4Ti 426 suppliers $12.00-$2765.07

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