一锅法制备复合材料的吸附性能  

Adsorption properties of composites prepared by one-pot method

作　　者：马亚凯 朱锡锋 王储 MA Yakai;ZHU Xifeng;WANG Chu(School of Engineering Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学工程科学学院,安徽合肥230026

出　　处：《洁净煤技术》2025年第2期112-123,共12页Clean Coal Technology

基　　金：国家自然科学基金资助项目(52306283)。

摘　　要：为应对水体中抗生素污染对生态环境和人类健康的威胁,同时推动重质生物油高值化利用,研究致力于开发一种具有高吸附容量和高稳定性的多孔碳材料。针对传统生物炭吸附剂孔隙结构单一、表面活性位点不足等问题,结合金属有机骨架模板法与化学活化协同策略,通过调控生物油重质组分的碳化过程,探究其对四环素的吸附机制,为绿色吸附材料的规模化应用提供理论支持。研究以生物油重质组分为可再生碳源,通过一锅法同步整合2-甲基咪唑锌盐与KOH活化剂,在高温碳化过程中实现模板定向造孔与化学活化的协同效应,制备多孔碳材料。为揭示协同机制,对比制备了仅含模板(HZ-800)、仅含活化剂(HK-800)及两者协同(HZK-800)的3类材料。系统采用比表面积分析、微观形貌表征等方法解析材料结构特性,通过系列吸附试验考察环境条件对四环素去除效率的影响,并结合动力学模型、等温线拟合及热力学参数计算阐明吸附机理。结果表明:模板与活化剂的协同作用有效构建了层次化孔隙网络,HZK-800展现出显著优化的比表面积与良好的孔隙结构,其吸附性能远超单一处理材料。该材料对四环素的最大吸附容量达到464.55mg/g,且在强酸、强碱环境中仍保持稳定吸附效率。结构表征证实,锌盐模板引导形成介孔框架,活化剂刻蚀产生丰富微孔,而生物油芳香组分碳化形成高稳定性的石墨化材料,三者协同实现了孔隙结构与表面化学性质的调控。研究开发的HZK-800多孔碳在吸附容量、环境适应性和循环稳定性方面展现出显著优势,不仅为抗生素污染治理提供了经济高效的解决方案,也为生物质资源的高效转化与功能化碳材料设计提供了新思路,对推动水处理吸附技术的绿色化发展具有一定的实践意义。In order to address the threat of antibiotic contamination in the aquatic environment to the ecosystem and human health,as well as to promote the high-value utilization of heavy bio-oil,the present study is dedicated to the development of a porous carbon material with high adsorption capacity and high stability.Aiming at the problems of single pore structure and insufficient surface active sites of traditional biochar adsorbents,the synergistic strategy of metal-organic skeleton template method and chemical activation was combined.By regulating the carbonation process of the heavy components of bio-oil,the adsorption mechanism of tetracycline was explored to provide theoretical support for the large-scale application of green adsorbent materials.In this study,porous carbon materials were prepared by using the heavy fraction of bio-oil as a renewable carbon source,and by synchronously integrating the 2-methylimidazole zinc salt and the KOH activator through the one-pot method to achieve the synergistic effect of template-directed poremaking and chemical activation during the high-temperature carbonization process.In order to reveal the synergistic mechanism,three types of materials containing only template(HZ-800),only activator(HK-800)and both synergistically(HZK-800)were prepared in comparison.The system adopted specific surface area analysis and micro-morphological characterization to analyze the structural properties of the materials,investigated the influence of environmental conditions on the removal efficiency of tetracycline through a series of adsorption experiments,and elucidated the adsorption mechanism by combining kinetic modelling,isotherm fitting and thermodynamic parameter calculations.The results showed that the synergistic effect of the template and activator effectively constructed a hierarchical pore network,and HZK-800 exhibited a significantly optimized specific surface area and good pore structure,and its adsorption performance far exceeded that of a single treated material.The maximum adsor

关 键 词：生物油 金属有机骨架 生物炭 四环素 吸附 

分 类 号：TK6[动力工程及工程热物理—生物能] X524[环境科学与工程—环境工程]