Developed Photocatalytic Cotton Fabric with Agricultural By-Products Tea Saponins for Accelerating Aqueous Chromium(VI) Reductive Removal

ABSTRACT

In order to achieve the goal of preparing functional textiles using tea saponin, in this work, carboxymethylated tea saponin (CTS) was used to modify cotton fabrics by an industrial rolling and baking process, and then functional textiles could be obtained after coordination with Fe³⁺, which could remove Cr species from water by photocatalytic reduction and adsorption processes. High CTS concentrations and higher treatment temperatures led to an increase in the carboxyl group content (Q_COOH) and Fe content (Q_Fe) of the obtained Fe-CTS-Cotton. The increase in the Q_Fe value of the functional textiles favored the photocatalytic reduction of Cr(VI). Fe-CTS-Cotton with high Q_COOH values showed excellent adsorption performance for the generated Cr(III) ions during the adsorption process. Therefore, the high photocatalytic reduction efficiency and strong Cr(III) ion trapping ability were the reasons for the recycling of Fe-CTS-cotton as a hybrid photocatalyst for enhanced removal of Cr(VI).

摘要

为了实现利用茶皂素制备功能性纺织品的目的，本工作采用羧甲基化茶皂素（CTS）对棉织物进行轧-烘-焙工业化改性，然后与Fe³⁺配位得到功能性纺织品，然后通过光催化还原和吸附过程完全去除水中的Cr物种. 较高的CTS浓度和处理温度使得所获得的Fe-CTS棉的羧基含量（Q_COOH）和Fe含量（Q_Fe）增加。功能性纺织品Q_Fe值的增加有利于Cr（VI）的光催化还原. 具有高Q_COOH值的Fe-CTS-棉在吸附过程中对生成的Cr（III）离子表现出优异的吸附性能. 因此，Fe-CTS-棉具有很高的光催化还原效率和很强的捕获 Cr(III) 离子的能力，这是将其作为增强去除 Cr(VI) 的光催化剂进行回收利用的原因。

KEYWORDS:

• Tea saponin
• carboxymethylation reaction
• Cr species removal
• Photocatalytic textiles
• Fe complex

关键词:

• 茶皂素
• 羧甲基化反应
• Cr物种去除
• 光催化纺织品
• Fe content Fe含量

Acknowledgments

This research was supported in part by the Jiangsu Province Industry-University-Research Cooperation Project (BY2022864), in part by the Jiangsu Advanced Textile Engineering Technology Center Funds (XJFZ/2022/1 and XJFZ/2022/3), in part by the Nantong Basic Science Research Program (MSZ2022162, JC22022049 and JCZ2022109), in part by the Research Project of Jiangsu College of Engineering and Technology (GYKY/2023/6, GYKY/2022/4, GYJY202303 and GYJY202307), in part by Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJB540002) and in part by Science and Technology Project of China National Textile And Apparel Council (2022030).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the Joint Project of Industry-University-Research of Jiangsu Province [BY2022864]; Nantong Basic Science Research Program [MSZ2022162]; Jiangsu College of Engineering and Technology Research Project [GYKY/2023/6]; Jiangsu Advanced Textile Engineering Technology Center Funds [XJFZ/2022/1]; Jiangsu College of Engineering and Technology Educational Reform Project [GYJY202303].