Scholarlink

<p>Dye pollution in water bodies poses a threat to both ecosystems and human health, necessitating the development of cost-effective adsorbents for wastewater decolorization. In this study, biomass-derived activated carbon (SPAC) was prepared from sweet potato residue via phosphoric acid activation and high-temperature carbonization, and then composited with mono-/few-layer MXene (Ti₃C₂Tₓ) to obtain SPAC-M. Physicochemical characterizations including XRD, BET, SEM, FTIR, particle size, and zeta potential analysis confirmed that SPAC-M possesses a high specific surface area (1118 m<sup>2</sup>/g), a well-developed porous structure with an average pore size of 2.86&#xa0;nm and a micropore area of 1052 m<sup>2</sup>/g, as well as favorable surface properties for anionic dye adsorption. The adsorption performance of SPAC-M on Congo Red (CR) and Allura Red (AR) was evaluated under different temperature and initial concentration conditions. The maximum adsorption capacities simulated by Langmuir at 55 ℃ were 332.62&#xa0;mg/g and 393.50&#xa0;mg/g, respectively. The saturated multilayer statistical physics model exhibited the best fitting performance (R<sup>2</sup> &gt; 0.999). Key parameters included the number of dye molecules per active site (n = 0.77–3.24), the total layers of adsorbed dye molecules (1 + N₂ = 1.51–2.05, confirmed by Giles L-2 isotherms), and adsorption energies (ΔE₁ = 15.28–33.60&#xa0;kJ/mol, ΔE₂ = 18.61–21.39&#xa0;kJ/mol), indicating a physisorption-dominated process involving electrostatic interactions and van der Waals forces. This work develops a new method for MXene composite sweet potato residue activated carbon with customized porous structure and optimized surface properties, which exhibits excellent adsorption performance for anionic dyes in wastewater.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Preparation of Biowaste-Based Activated Carbon/MXene Composite for Efficient Removal of Anionic azo Dyes from Water: Performance Evaluation and Mechanistic Insight

  • 期刊论文

  • 发表日期：

    2026年6月27日

查看全文
  • Xinyue Hu,
  • Lei Zhang,
  • Lotfi Sellaoui,
  • Zhiquan Diao,
  • Nour Sghaier,
  • Yifan Meng,
  • Adrian Bonilla-Petriciolet,
  • Xiang Gao,
  • Mohamed Mbarek,
  • Zichao Li

摘要

Dye pollution in water bodies poses a threat to both ecosystems and human health, necessitating the development of cost-effective adsorbents for wastewater decolorization. In this study, biomass-derived activated carbon (SPAC) was prepared from sweet potato residue via phosphoric acid activation and high-temperature carbonization, and then composited with mono-/few-layer MXene (Ti₃C₂Tₓ) to obtain SPAC-M. Physicochemical characterizations including XRD, BET, SEM, FTIR, particle size, and zeta potential analysis confirmed that SPAC-M possesses a high specific surface area (1118 m2/g), a well-developed porous structure with an average pore size of 2.86 nm and a micropore area of 1052 m2/g, as well as favorable surface properties for anionic dye adsorption. The adsorption performance of SPAC-M on Congo Red (CR) and Allura Red (AR) was evaluated under different temperature and initial concentration conditions. The maximum adsorption capacities simulated by Langmuir at 55 ℃ were 332.62 mg/g and 393.50 mg/g, respectively. The saturated multilayer statistical physics model exhibited the best fitting performance (R2 > 0.999). Key parameters included the number of dye molecules per active site (n = 0.77–3.24), the total layers of adsorbed dye molecules (1 + N₂ = 1.51–2.05, confirmed by Giles L-2 isotherms), and adsorption energies (ΔE₁ = 15.28–33.60 kJ/mol, ΔE₂ = 18.61–21.39 kJ/mol), indicating a physisorption-dominated process involving electrostatic interactions and van der Waals forces. This work develops a new method for MXene composite sweet potato residue activated carbon with customized porous structure and optimized surface properties, which exhibits excellent adsorption performance for anionic dyes in wastewater.