高中空生物质活性碳纤维制备及其对亚甲基蓝的吸附性能

doi:10.13475/j.fzxb.20200805106

纺织学报 ›› 2021, Vol. 42 ›› Issue (02): 129-134.doi: 10.13475/j.fzxb.20200805106

高中空生物质活性碳纤维制备及其对亚甲基蓝的吸附性能

程绿竹¹, 王宗乾¹(), 王邓峰², 申佳锟¹, 李长龙¹

1.安徽工程大学纺织服装学院, 安徽芜湖 241000
2.浙江理工大学材料科学与工程学院, 浙江杭州 310018

收稿日期:2020-08-10 修回日期:2020-11-09 出版日期:2021-02-15 发布日期:2021-02-23
通讯作者: 王宗乾
作者简介:程绿竹(1996—),女,硕士生。主要研究方向为生态染整技术与功能纺织品。
基金资助:
安徽省重点研究与开发计划项目(202004a06020055);安徽省重点研究与开发计划项目(201903a05020028);安徽省学术和技术带头人及后备人选学术科研资助项目(2020H218);芜湖市科技计划项目(2020yf51);安徽省高校学科(专业)中青年拔尖人才学术资助项目(gxbjZD2020075)

Preparation of highly hollow biomass-based activated carbon fiber and its adsorption property to methylene blue

CHENG Lüzhu¹, WANG Zongqian¹(), WANG Dengfeng², SHEN Jiakun¹, LI Changlong¹

1. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
2. School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China

Received:2020-08-10 Revised:2020-11-09 Online:2021-02-15 Published:2021-02-23
Contact: WANG Zongqian

摘要/Abstract

摘要：

为提高活性碳纤维对有色废水的吸附效率,以牛角瓜纤维为前驱体,采用磷酸活化、高温炭化工艺制备了具有高中空结构的活性碳纤维。采用扫描电镜/能谱仪、红外光谱仪等表征其微观形貌及化学结构,分析了所制备活性碳纤维对水溶液中亚甲基蓝的吸附性能与吸附机制。结果表明:牛角瓜活性碳纤维的平均中空度大于92%,具有粗糙表面和发达介孔结构,比表面积和平均孔径分别为1 244.812 m ²/g和3.744 nm;活性碳纤维表面富含O、P元素,构成了活性表面;亚甲基蓝溶液(100 mg/L)的饱和吸附量为198.840 mg/g,该吸附满足准二级动力学方程,同时符合Freundlich模型,以多层吸附为主。

关键词: 生物质活性碳纤维, 牛角瓜纤维, 亚甲基蓝, 吸附, 高中空结构, 废水处理

Abstract:

In order to improve the adsorption efficiency of activated carbon fiber to colored wastewater, the activated carbon fibers with highly hollow structures were prepared, using the calotropis gigantea fiber as the precursor, by phosphoric acid activation and high temperature carbonization. The morphology, chemistry and pore structures of the calotropis gigantean activated carbon fiber were characterized systematically by scanning electron microscopy-energy dispersive spectrometer, Fourier transform infrared spectrocopy methods. Meanwhile, the adsorption properties and mechanism of carbon fibers to methylene blue were analyzed. The results show that the average hollow degree of calotropis gigantea activated carbon fiber is more than 92%, and the fiber also exhibits a rough surface and develops mesoporous structures with the specific surface area and average pore diameter of 1 244.812 m ²/g and 3.744 nm, respectively. Moreover, the surface of carbon fiber is rich in elements O and P, which constitute the active surface of carbon fiber. The saturated adsorption capacity of the carbon fiber to methylene blue aqueous solution with initial mass concentration of 100 mg/L can reach 198.840 mg/g. The adsorption process to methylene blue follows the pseudo-second-order kinetic equation. The adsorption to methylene blue conforms to the Freundlich model, which is mainly multilayer adsorption.

Key words: biomass-based activated carbon fiber, calotropis gigantea fiber, methylene blue, adsorption, highly hollow structure, wastewater treatment

中图分类号:

TQ424.1

程绿竹, 王宗乾, 王邓峰, 申佳锟, 李长龙. 高中空生物质活性碳纤维制备及其对亚甲基蓝的吸附性能[J]. 纺织学报, 2021, 42(02): 129-134.

CHENG Lüzhu, WANG Zongqian, WANG Dengfeng, SHEN Jiakun, LI Changlong. Preparation of highly hollow biomass-based activated carbon fiber and its adsorption property to methylene blue[J]. Journal of Textile Research, 2021, 42(02): 129-134.

图/表 8

图1

图2

图3

图4

图5

表1

亚甲基蓝吸附曲线拟合动力学参数"

准一级动力学方程拟合			准二级动力学方程拟合
Q_e/ (mg·g^-1)	K₁/ min^-1	$R 12$	Q_e/ (mg·g^-1)	K₂/ min^-1	$R 22$
194.376	0.129	0.992	200.024	0.001 4	0.999

表1

图6

表2

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Langmuir			Freundlich
Q_max/ (mg·g^-1)	K_L	R²	n_F	K_F	R²
362.738	0.195	0.418	9.581	198.916	0.932

高中空生物质活性碳纤维制备及其对亚甲基蓝的吸附性能

Preparation of highly hollow biomass-based activated carbon fiber and its adsorption property to methylene blue

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