Sol-gel template synthesis of visible photoactive Cu-S co-doped mesoporous TiO2 catalyst

IF 1.4 Q4 WATER RESOURCES

Journal of Applied Water Engineering and Research Pub Date : 2022-09-02 DOI:10.1080/23249676.2022.2116116

A. Hamisu, S. S. Bala, A. Bello, A. Abubakar, A. A. Adeyi

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Abstract

A new visible photoactive catalyst (Cu, S/PEG-PVA/TiO2) was synthesized by the sol-gel method. In addition, Cu, S/TiO2 and Bare TiO2 were synthesized to compare their properties and activities. The synthesized catalysts were characterized using XRD, N2 adsorption–desorption measurements, SEM, TEM, EDX, UV-Vis spectroscopy and TGA. The photocatalytic activities of the synthesized photocatalysts were evaluated by measuring the photocatalytic degradation of 4-nitrophenol under visible light irradiation. Then, the impacts of three parameters, (catalyst loading, pH and H2O2 concentration) for optimization and modelization of the 4-nitrophenol photodegradation were studied using the response surface methodology. Optimal conditions obtained from statistical analysis at a catalyst loading of 1 gL−1, pH of 3.98 and H2O2 concentration of 8 mg/L have shown the highest 4-NP percentage degradation of 70.5% in 1 h. The results predicted by the models were found to be in good agreement with those obtained by performing the experiment (R 2 = 0.9443 and Adj-R 2 = 0.9038).

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溶胶-凝胶模板法合成可见光活性Cu-S共掺杂介孔TiO2催化剂

采用溶胶-凝胶法合成了一种新型可见光活性催化剂（Cu，S/PEG-PVA/TiO2）。此外，还合成了Cu、S/TiO2和Bare TiO2，比较了它们的性能和活性。利用XRD、N2吸附-脱附测量、SEM、TEM、EDX、UV-Vis光谱和TGA对合成的催化剂进行了表征。通过测定在可见光照射下对4-硝基苯酚的光催化降解，评价了合成的光催化剂的光催化活性。然后，利用响应面法研究了催化剂负载量、pH和H2O2浓度三个参数对4-硝基苯酚光降解优化和模型化的影响。在催化剂负载量为1时通过统计分析获得的最佳条件 gL−1，pH为3.98，H2O2浓度为8 mg/L的4-NP降解率最高，为70.5% h.发现模型预测的结果与通过进行实验获得的结果非常一致（R2 = 0.9443和调整R 2 = 0.9038）。

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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

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