Thermodynamics, Kinetics, and Mechanism of Luteolin Adsorption on Nickel-Doped Amino-Modified Silica

IF 0.9 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Russian Journal of General Chemistry Pub Date : 2025-02-27 DOI:10.1134/S1070363224611797

X. Niu, D. Han, B. Zhang, X. He, Y. Zhang, Z. Yan

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Abstract

N-[3-(Trimethoxysilyl)propyl]ethylenediamine, tetraethyl silicate, nickel acetate, and sodium hydroxide solution were reacted through using anhydrous ethanol as the solvent and heated in a water bath to synthesize nickel-doped amino-modified silica adsorbent material (NDAMS). The structure of NDAMS was characterized by utilizing XRD, BET, FTIR, and XPS. The thermodynamics, kinetics and mechanism of luteolin adsorption on NDAMS were examined. The results exhibit that NDAMS achieves a 94.69% adsorption efficiency for luteolin at 298 K, demonstrating excellent adsorption performance. As the temperature increases, the adsorption amount rises, which conforms to the Langmuir model. The adsorption process aligns with the pseudo-second-order kinetic model, with an enthalpy (ΔH) of 30.68 kJ/mol, entropy (ΔS) of 198.70 J/(mol K), and Gibbs free energy (ΔG) of –28.44 kJ/mol at 298 K. NDAMS may adsorb luteolin through a spontaneous, endothermic and monolayer chemisorption process, in which a bond is formed between the doped nickel atoms and the oxygen atoms in the luteolin’s phenolic hydroxyl group.

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木犀草素在镍掺杂氨基改性二氧化硅上吸附的热力学、动力学及机理

以N-[3-（三甲氧基硅基）丙基]乙二胺、硅酸四乙酯、乙酸镍和氢氧化钠溶液为溶剂，以无水乙醇为溶剂，在水浴中加热，合成了掺杂镍的氨基改性二氧化硅吸附剂（NDAMS）。采用XRD、BET、FTIR、XPS等手段对NDAMS的结构进行了表征。研究了木犀草素在ndam上吸附的热力学、动力学和机理。结果表明，在298 K下，NDAMS对木犀草素的吸附效率为94.69%，具有良好的吸附性能。随着温度的升高，吸附量增加，符合Langmuir模型。吸附过程符合准二级动力学模型，在298 K时焓（ΔH）为30.68 kJ/mol，熵（ΔS）为198.70 J/(mol K)，吉布斯自由能（ΔG）为-28.44 kJ/mol。NDAMS可以通过自发、吸热和单层化学吸附过程吸附木犀草素，其中掺杂的镍原子与木犀草素酚羟基上的氧原子之间形成键。

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来源期刊

Russian Journal of General Chemistry 化学-化学综合

CiteScore

1.40

自引率

22.20%

发文量

252

审稿时长

2-4 weeks

期刊介绍： Russian Journal of General Chemistry is a journal that covers many problems that are of general interest to the whole community of chemists. The journal is the successor to Russia’s first chemical journal, Zhurnal Russkogo Khimicheskogo Obshchestva (Journal of the Russian Chemical Society ) founded in 1869 to cover all aspects of chemistry. Now the journal is focused on the interdisciplinary areas of chemistry (organometallics, organometalloids, organoinorganic complexes, mechanochemistry, nanochemistry, etc.), new achievements and long-term results in the field. The journal publishes reviews, current scientific papers, letters to the editor, and discussion papers.