Deep remediation of oil spill based on the photocatalytic degradation of solar light-driven floating C-doped TiO2/Sepiolite composites

被引：0

作者：

Xu, Wenyan ^{[1
]}

Yang, Minghui ^{[1
]}

Du, Minghe ^{[1
]}

Gao, Yuting ^{[1
]}

Yan, Chunjie ^{[1
]}

Zhou, Feng ^{[1
]}

机构：

[1] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Peoples R China

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2025年 / 145卷

基金：

中国国家自然科学基金;

关键词：

Sepiolite; Hydrophobic modification; Photocatalysis; Oil spill remediation; IN-SITU SYNTHESIS; SURFACE-PROPERTIES; TIO2; NANOCOMPOSITES;

D O I：

10.1016/j.jiec.2024.10.054

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study developed a novel C-doped floating-type TiO2/sepiolite composite. C-TiO2/Sep composites were synthesized using various carbon sources (glucose, acetic acid, acetylacetone) through a simple hydrothermal method, with a Ti to C molar ratio of 5 and a Ti to sepiolite ratio of 40 mmol/g. The floatable composites were obtained via hydrophobic modification using a stearic acid to product ratio of 0.7 mmol/g. The resulting composites were characterized using XRD, SEM, PL, XPS, and UV-vis. The results indicate that the chemical and morphological properties of the composites are significantly affected by the carbon source. Compared to undoped samples, the C-doped samples exhibit improved anatase phase stability and reduced grain sizes. The incorporation of C is predominantly exhibited as C-O-Ti-O, and the surfaces of the samples are modified with carbon photosensitizers. PL spectra and photocatalytic activity tests under visible light reveal that the CTHS-GLU (Hydrophobic Sepiolite with Carbon-Doped TiO2 Using Glucose as the Carbon Precursor) sample achieved an 80.78 % oil removal rate, demonstrating the best efficiency in oil spill remediation, which is attributed to Cdoping's reduced band gap, high adsorption capacity, uniform TiO2 distribution, and enhanced surface hydrophobicity.

引用

页码：610 / 619

页数：10

共 38 条

[11] Wang S., Zhao L., Bai L., Yan J., Jiang Q., Lian J., Enhancing photocatalytic activity of disorder-engineered C/TiO 2 and TiO 2 nanoparticles, J. Mater. Chem. A, 2, pp. 7439-7445, (2014)
[12] Zhang Y., Zhao Z., Chen J., Cheng L., Chang J., Sheng W., Hu C., Cao S., C-doped hollow TiO2 spheres: in situ synthesis, controlled shell thickness, and superior visible-light photocatalytic activity, Appl. Catal., BEnvironmental, 165, pp. 715-722, (2015)
[13] Li H., Wang D., Fan H., Wang P., Jiang T., Xie T., Synthesis of highly efficient C-doped TiO2 photocatalyst and its photo-generated charge-transfer properties, J. Colloid Interface Sci., 354, pp. 175-180, (2011)
[14] Zhou F., Yan C., Zhang Y., Tan J., Wang H., Zhou S., Purification and defibering of a Chinese sepiolite, Appl. Clay Sci., 124-125, pp. 119-126, (2016)
[15] Peng X., Yuan Z., Zhao H., Wang H., Wang X., Preparation and mechanism of hydrophobic modified diatomite coatings for oil-water separation, Sep. Purif. Technol., 288, (2022)
[16] Patti A., Lecocq H., Serghei A., Acierno D., Cassagnau P., The universal usefulness of stearic acid as surface modifier: applications to the polymer formulations and composite processing, J. Ind. Eng. Chem., 96, pp. 1-33, (2021)
[17] Jia J., Li D., Wan J., Yu X., Characterization and mechanism analysis of graphite/C-doped TiO2 composite for enhanced photocatalytic performance, J. Ind. Eng. Chem., 33, pp. 162-169, (2016)
[18] Yang M., Gao Y., Zhang J., Zhou F., Hydrophobic modification of sepiolite by fatty acids for efficient oil removal: Influence of the alkyl chain length, Appl. Clay Sci., 235, (2023)
[19] Bu X., Zhang G., Zhang C., Effect of nitrogen doping on anatase–rutile phase transformation of TiO2, Appl. Surf. Sci., 258, pp. 7997-8001, (2012)
[20] Lin Y.-T., Weng C.-H., Lin Y.-H., Shiesh C.-C., Chen F.-Y., Effect of C content and calcination temperature on the photocatalytic activity of C-doped TiO2 catalyst, Sep. Purif. Technol., 116, pp. 114-123, (2013)

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