球磨法合成生物质胶体压印介孔碳的苯吸附能力创历史新高

IF 8.1 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Barbara Szczęśniak , Łukasz Osuchowski , Jerzy Choma , Mietek Jaroniec
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引用次数: 0

摘要

采用简单的机械化学合成方法制备了具有大均匀介孔的介孔碳。一锅合成依赖于仅两种试剂,单宁和二氧化硅胶体,在10 min内快速球磨,然后在750 °C下直接热处理,导致碳具有均匀的介孔约25 nm,高比表面积可达~ 1000 m2/g,总孔体积可达2.80 cm3/g。这似乎是利用机械化学合成胶体印迹碳的第一次尝试。此外,通过在铣削体系中加入pluronic型模板,该方法可以很容易地扩展到合成具有双峰介孔的碳。后者合成的碳具有双峰介孔,主要孔径为13.8和24.8 nm,高比表面积为1218 m2/g,特别高的孔体积为4.75 cm3/g,不使用活化剂。据我们所知,该样品在20 °C时吸附了创纪录的苯量,即48.0 mmol/g。结果表明,总孔容是不同多孔固体对苯吸附的决定因素。高介孔率的碳可能是必不可少的吸附和催化相关的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Record-high benzene adsorption capacity of colloid-imprinted mesoporous carbons synthesized from biomass by ball milling

Record-high benzene adsorption capacity of colloid-imprinted mesoporous carbons synthesized from biomass by ball milling

Record-high benzene adsorption capacity of colloid-imprinted mesoporous carbons synthesized from biomass by ball milling
A facile mechanochemical synthesis was used for the preparation of mesoporous carbons with large uniform mesopores. The one-pot synthesis relied on the fast ball milling of only two reagents, tannins, and silica colloids, within 10 min, followed by direct thermal treatment at 750 °C leading to carbons with uniform mesopores of about 25 nm, high specific surface areas up to ∼1000 m2/g, and total pore volumes up to 2.80 cm3/g. This seems to be the first attempt to employ mechanochemistry for the synthesis of colloid-imprinted carbons. Moreover, the procedure can be easily extended for the synthesis of carbons with bimodal mesoporosity by adding a Pluronic-type soft template to the milling system. The latter synthesis afforded carbons with bimodal mesoporosity, having predominantly pore sizes of 13.8 and 24.8 nm, a high specific surface area of 1218 m2/g, and an exceptionally high pore volume of 4.75 cm3/g, without using an activating agent. To the best of our knowledge, this sample adsorbed a record amount of benzene at 20 °C, namely 48.0 mmol/g (375 wt%). It is shown that the total pore volume is a determining factor for benzene adsorption on diverse porous solids. High mesoporosity in carbons might be essential in adsorption and catalysis-related applications.
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来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
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