标题: Synthesis of hydrophilic sulfur-doped carbon aerogel microspheres and their mechanism of efficient removal of Sb(III) from aqueous solution
作者: Zeng, QY (Zeng, Qingyuan); Li, JH (Li, Jiahao); Dai, LM (Dai, Luming); Zhang, JX (Zhang, Jiaxing); Zeng, TY (Zeng, Tianyu); Cheng, R (Cheng, Rong); Chen, JA (Chen, Jiaao); Zhou, M (Zhou, Min); Hou, HB (Hou, Haobo)
来源出版物: SEPARATION AND PURIFICATION TECHNOLOGY 卷: 329 文献号: 125032 DOI: 10.1016/j.seppur.2023.125032 提前访问日期: SEP 2023 出版年: JAN 15 2024
摘要: Antimony pollution is well recognized to induce cancer and deformity. By polymerization technique, a carbon aerogel microsphere (Ce@SCA) modified by Ce and S with micron size, well-developed pore structure, and large specific surface area was created. Ce@SCA exhibited the advantages of efficient selectivity and high adsorption capacity for Sb(III) in water. The highest adsorption capacity derived using the Sips isothermal model was 345.18 mg.g(-1), and the Sb (III) adsorption process was thermodynamically estimated as spontaneous, exothermic, and entropy-decreasing chemisorption. Meanwhile, Ce@SCA can convert highly toxic Sb(III) into Sb (V), which is suitable for the remediation of antimony-contaminated water bodies. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) were analyzed to elucidate the adsorption mechanism and to propose optimized adsorption configurations. A considerable number of -OH and -SH on the surface may increase the binding site of Sb, and the creation of S-Sb, O-Sb, and Ce-O-Sb covalent bonds was the key to Sb adsorption. This research provides a simple method for preparing cerium oxide-loaded and sulfur-doped carbon aerogel (Ce@SCA) with mild conditions and no hazardous waste, which also has superior adsorption properties for Sb (III) and high reusability.
作者关键词: Antimony; Hydrophilic carbon aerogel; Selective removal Adsorption; DFT calculations
地址: [Zeng, Qingyuan; Li, Jiahao; Dai, Luming; Zhang, Jiaxing; Zeng, Tianyu; Cheng, Rong; Chen, Jiaao; Zhou, Min; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.
[Li, Jiahao; Zeng, Tianyu; Hou, Haobo] Wuhan Univ, Zhaoqing Inst Resources & Environm Technol, Zhaoqing 526200, Guangdong, Peoples R China.
[Chen, Jiaao] Cent South Univ Forestry & Technol, Coll Landscape Architecture, Changsha 410004, Hunan, Peoples R China.
通讯作者地址: Li, JH; Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.
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