现代化工

现代化工 ›› 2022, Vol. 42 ›› Issue (S2) : 279-282. DOI: 10.16606/j.cnki.issn0253-4320.2022.S2.055

科研与开发

铝掺杂碳材料的制备及其对刚果红吸附性能研究

李博远, 王亚通, 王安, 樊凯丽, 边思梦, 孙晓然

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Preparation of Al-doped carbon material and study on its adsorption performance for Congo red

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Received		Published
2022-04-13		2022-10-30
Issue Date	Revised Date
2022-10-24	2022-04-13

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摘要

以腐植酸(HA)和Al₂(SO₄)₃为原料,经高温固相反应合成了铝掺杂碳材料(CAH),研究了CAH对刚果红(CR)的吸附性能。最佳制备条件为保温温度400℃、m(HA)∶m[Al₂(SO₄)₃]=2∶3、保温时间3 h、升温速率15℃/min,吸附量最高可达4 g/g。采用SEM和FT-IR对HA和CAH的微观形态和结构进行了表征分析。通过吸附热力学和吸附动力学分析,CAH吸附CR的过程符合Langmuir吸附模型和准二级动力学模型,主要吸附方式属于单分子层化学吸附。

Abstract

Aluminum doped carbon material (CAH) is synthesized from humic acid (HA) and aluminum sulfate (Al₂(SO₄)₃) by high temperature solid state reaction.The adsorption properties of CAH to Congo red (CR) are studied.The optimum preparation conditions are determined as follows:reaction temperature is at 400℃,m(HA)∶m(Al₂(SO₄)₃)=2∶3,holding time is 3 h,and heating rate is 15℃·min^-1.The maximum adsorption capacity of CAH prepared under the optimal conditions can reach 4 000 mg·g^-1 to Congo red.The micro morphology and structure of HA and CAH are characterized by SEM and FT-IR.Through the analysis of adsorption thermodynamics and adsorption kinetics,the process for CAH adsorbing CR conforms to Langmuir adsorption model and quasi second-order kinetic model,and main adsorption mode belongs to monolayer chemical adsorption.