栓皮栎软木分级多孔活性炭的制备及对亚甲基蓝的吸附

doi:10.11896/cldb.21090088

材料导报

2023, Vol. 37

Issue (8): 21090088-7 https://doi.org/10.11896/cldb.21090088

高分子与聚合物基复合材料

栓皮栎软木分级多孔活性炭的制备及对亚甲基蓝的吸附

吴肖, 魏新莉^*, 赵栋, 翟文翔, 李旺

中南林业科技大学材料科学与工程学院,长沙 410004

Preparation of Graded Porous Activated Carbon from Cork and Its Adsorption Properties for Methylene Blue

WU Xiao, WEI Xinli^*, ZHAO Dong, ZHAI Wenxiang, LI Wang

College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China

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摘要栓皮栎软木具有蜂窝状的多孔细胞结构,碳含量高,是制备生物质活性炭的优质原料。但是现有软木活性炭孔径结构单一、比表面积小,限制了其吸附效果的发挥,构建结构稳定、高比表面积的分级多孔活性炭显得极其重要。本研究以工业废弃的栓皮栎软木粉为原料,探究了预处理温度对软木细胞蜂窝状结构的影响和所制备活性炭的吸附性能,通过调节NaOH用量与活化温度,制备出高比表面积的分级多孔栓皮栎软木活性炭(CACs),并将其用于对亚甲基蓝(MB)染料的吸附。研究结果表明,预处理温度为300 ℃、碱炭质量比为3∶1、活化温度为800 ℃是最佳的制备工艺条件,所制备的活性炭具有比表面积大(2 312.85 m²/g)、总孔容大(1.40 cm³/g)、对MB的吸附量大(850.07 mg/g)等特点。本研究显示出分级多孔软木活性炭作为高性能、低成本吸附材料的潜在应用前景。

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关键词: 栓皮栎软木活性炭 NaOH活化亚甲基蓝吸附性能

Abstract: Cork (Quercus variabilis) has a compact and orderly honeycomb-like cellular structure and high carbon content. It is a high-quality raw material for the preparation of biomass activated carbon. However, the existing cork activated carbon has a single pore structure and low specific surface area, which seriously limits its adsorption effect. How to prepare a hierarchical porous activated carbon with stable structure and high specific surface area is extremely important. In this study, the cork powder of Quercus variabilis was used as raw material and the effect of pretreatment temperature on the honeycomb-like structure of cork cells and the adsorption performance of the prepared activated carbon were explored. At the same time, hierarchical porous cork activated carbon (CACs) with high specific surface area was prepared by adjusting the mass ratios of NaOH and activation temperature and used to adsorb methylene blue (MB) dye. The results show that the best process conditions for preparing cork activated carbon is when the pretreatment temperature is 300 ℃, the mass ratios of NaOH to carbon is 3∶1 and the activation temperature is 800 ℃. The prepared cork activated carbon has the characteristics of high specific surface area (2 312.85 m²/g), large total pore volume (1.40 cm³/g) and large adsorption capacity for MB (850.07 mg/g). This paper shows the potential application prospect of hierarchical porous cork activated carbon as a high-performance and low-cost adsorption material.

Key words: cork activated carbon NaOH activation methylene blue adsorption performance

出版日期: 2023-04-25 发布日期: 2023-04-24

ZTFLH:

TQ424.1

基金资助: 湖南省教育厅科学研究重点项目(19A530)

通讯作者: *魏新莉,中南林业科技大学副教授。2013年7月毕业于中南林业科技大学,获木材科学与技术博士学位。2004年进入中南林学院材料科学与工程学院工作至今,主要从事生物质材料和软木功能材料的研究与应用。在国内外相关期刊发表文章30余篇,授权发明专利1项。weixl_3@163.com

作者简介: 吴肖,本科毕业于中南林业科技大学,现为中南林业科技大学材料科学与工程学院在读硕士研究生。主要从事生物质资源利用的研究。

引用本文:

吴肖, 魏新莉, 赵栋, 翟文翔, 李旺. 栓皮栎软木分级多孔活性炭的制备及对亚甲基蓝的吸附[J]. 材料导报, 2023, 37(8): 21090088-7.
WU Xiao, WEI Xinli, ZHAO Dong, ZHAI Wenxiang, LI Wang. Preparation of Graded Porous Activated Carbon from Cork and Its Adsorption Properties for Methylene Blue. Materials Reports, 2023, 37(8): 21090088-7.

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https://www.mater-rep.com/CN/10.11896/cldb.21090088 或 https://www.mater-rep.com/CN/Y2023/V37/I8/21090088

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