用于吸附环丙沙星的蔗糖和偏硅酸钠环保型微多孔碳模板：分子自结合对扩散机制的影响

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2024-11-07 DOI:10.1016/j.ces.2024.120907

Carla Santolin , Kêissedy Veridiane Hübner , Ricardo Schneider , Helton José Alves , Nader Marzban , Fabiano Bisinella Scheufele

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引用次数: 0

摘要

本研究提出了一种通过纳米浇铸蔗糖/偏硅酸钠合成有序介孔碳的绿色方法，只需用热水（70 °C）去除模板。研究人员对偏硅酸钠-蔗糖介孔碳（MSMC）的结构、质地、表面化学特性及其对环丙沙星（CIP）吸附的影响进行了表征。研究采用了现象学模型，包括两种表面反应模型：吸附剂位点吸附（AAS）和异质表面吸附（AHS），以及两种传质模型：外膜扩散（EFD）和颗粒内均质扩散（IHD）。含有中孔（3.8 纳米）和微孔（1.8 纳米和 0.87 纳米）的可控多孔结构允许 "孔隙填充效应 "机制和非常有利的动力学。研究人员获得了一种高含氧碳材料（C：81.84 % O：15.04 % Si：1.72 % Na：1.29 %），该材料具有高效的模板去除能力。在 CIP 分子（二聚体、三聚体和四聚体）的自聚集作用下，观察到限速步骤（AAS 或 IHD）随 CIP 浓度变化的异常行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Eco-friendly micro-mesoporous carbon from sucrose and sodium metasilicate template for ciprofloxacin adsorption: Effect of molecules self-association over diffusion mechanisms

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Eco-friendly micro-mesoporous carbon from sucrose and sodium metasilicate template for ciprofloxacin adsorption: Effect of molecules self-association over diffusion mechanisms

A green synthesis route of ordered mesoporous carbon by nanocasting of sucrose/sodium metasilicate with template removal only by hot water (70 °C) is proposed. The metasilicate-sucrose mesoporous carbon (MSMC) was characterized by structural, textural, surface chemistry properties and their effect on ciprofloxacin (CIP) adsorption. Phenomenological modeling was applied, including two surface-reaction models: adsorption on adsorbent sites (AAS) and on heterogeneous surface (AHS), and two mass transfer models: external film (EFD) and intraparticle homogeneous (IHD) diffusion. A controlled porous structure containing mesopores (3.8 nm) with micropores (1.8 and 0.87 nm) allowed the “pore filling effect” mechanism and strongly favorable kinetics. A highly oxygenated carbon material (C: 81.84% O: 15.04% Si: 1.72% Na: 1.29%) with efficient template removal was obtained. Unusual behavior of the rate-limiting step (AAS or IHD) as a function of CIP concentrations was observed, with mechanism changes due to self-aggregation of CIP molecules (dimers, trimers and tetramers).

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.