Facile synthesis copper-modified titania (Cu/TiO2) nanoparticles for high-efficiency Congo red adsorption

doi:10.1016/j.cjche.2024.12.015

Chinese Journal of Chemical Engineering ›› 2025, Vol. 81 ›› Issue (5): 87-94.DOI: 10.1016/j.cjche.2024.12.015

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Facile synthesis copper-modified titania (Cu/TiO₂) nanoparticles for high-efficiency Congo red adsorption

Shuaishuai Zhang¹, Qingwen Luo¹, Xinan Sun¹, Lin Chi¹, Peng Sun¹, Lianke Zhang^1,2

1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. School of Automation and Electrical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

Received:2024-10-30 Revised:2024-12-01 Accepted:2024-12-23 Online:2025-03-08 Published:2025-05-28
Contact: Shuaishuai Zhang,E-mail:zhangss123@imust.edu.cn;Lianke Zhang,E-mail:nkdlkzhang@163.com
Supported by:
This work was supported by the Inner Mongolia Natural Science Foundation (2024QN02011), basic scientific research business expense project of colleges and universities directly under Inner Mongolia (2023QNJS131 and 2024QNJS127), and Science and Technology Plan Program of Inner Mongolia Autonomous Region (2023YFDZ0031).

Facile synthesis copper-modified titania (Cu/TiO₂) nanoparticles for high-efficiency Congo red adsorption

Shuaishuai Zhang¹, Qingwen Luo¹, Xinan Sun¹, Lin Chi¹, Peng Sun¹, Lianke Zhang^1,2

1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. School of Automation and Electrical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

通讯作者: Shuaishuai Zhang,E-mail:zhangss123@imust.edu.cn;Lianke Zhang,E-mail:nkdlkzhang@163.com
基金资助:
This work was supported by the Inner Mongolia Natural Science Foundation (2024QN02011), basic scientific research business expense project of colleges and universities directly under Inner Mongolia (2023QNJS131 and 2024QNJS127), and Science and Technology Plan Program of Inner Mongolia Autonomous Region (2023YFDZ0031).

Abstract

Abstract: Pure TiO₂ and copper-modified titania (Cu/TiO₂) nanoparticles were synthesized through sol gel combined with the pyrolysis method for the removal of Congo red (CR) in wastewater treatment. Surface morphology and structural evaluation utilized XRD, TEM, Raman, FTIR and BET techniques. Cu/TiO₂ showed rich defects and a higher specific surface area than that of TiO₂. The 1Cu/TiO₂ (molar ratio Cu/TiO₂ of 1/100) showed the best performance to adsorption of CR solution at different reaction conditions (contact duration, CR concentration, adsorbent dose, temperature, and initial pH). Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-second-order kinetics and Freundlich model, respectively. The negative ΔG indicates stable adsorption of CR on the Cu/TiO₂ surface. The adsorption efficiency only decreases by 6% after 5 cycles of adsorption regeneration. The successful synthesis of Cu/TiO₂ offers a new possibility to address the problems related to CR dye from aqueous solutions.

Key words: Cu/TiO₂ nanoparticles, Congo red, Adsorption behavior, Stability

摘要： Pure TiO₂ and copper-modified titania (Cu/TiO₂) nanoparticles were synthesized through sol gel combined with the pyrolysis method for the removal of Congo red (CR) in wastewater treatment. Surface morphology and structural evaluation utilized XRD, TEM, Raman, FTIR and BET techniques. Cu/TiO₂ showed rich defects and a higher specific surface area than that of TiO₂. The 1Cu/TiO₂ (molar ratio Cu/TiO₂ of 1/100) showed the best performance to adsorption of CR solution at different reaction conditions (contact duration, CR concentration, adsorbent dose, temperature, and initial pH). Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-second-order kinetics and Freundlich model, respectively. The negative ΔG indicates stable adsorption of CR on the Cu/TiO₂ surface. The adsorption efficiency only decreases by 6% after 5 cycles of adsorption regeneration. The successful synthesis of Cu/TiO₂ offers a new possibility to address the problems related to CR dye from aqueous solutions.

关键词: Cu/TiO₂ nanoparticles, Congo red, Adsorption behavior, Stability

Shuaishuai Zhang, Qingwen Luo, Xinan Sun, Lin Chi, Peng Sun, Lianke Zhang. Facile synthesis copper-modified titania (Cu/TiO₂) nanoparticles for high-efficiency Congo red adsorption[J]. Chinese Journal of Chemical Engineering, 2025, 81(5): 87-94.

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Facile synthesis copper-modified titania (Cu/TiO₂) nanoparticles for high-efficiency Congo red adsorption

Facile synthesis copper-modified titania (Cu/TiO₂) nanoparticles for high-efficiency Congo red adsorption

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