磁性Fe3O4/改性焦炭的制备及其降解性能

doi:10.16085/j.issn.1000-6613.2016-2176

化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2577-2583.DOI: 10.16085/j.issn.1000-6613.2016-2176

磁性Fe₃O₄/改性焦炭的制备及其降解性能

魏晓币, 王光华, 李文兵, 万栋, 刘阳, 邵秋桐

武汉科技大学化学与化工学院, 湖北武汉 430081

收稿日期:2016-11-23 修回日期:2017-03-28 出版日期:2017-07-05 发布日期:2017-07-05
通讯作者: 王光华,教授,博士生导师,主要从事洁净煤技术及环境友好技术、低品质煤提质技术、精细化工与综合利用、废水废气治理等研究工作。
作者简介:魏晓币(1992-),男,硕士研究生,从事废水处理等研究工作。E-mail:571529489@qq.com。
基金资助:
湖北省自然科学基金项目（2014CFB810）。

Preparation and degradation properties of magnetic Fe₃O₄/modified coke

WEI Xiaobi, WANG Guanghua, LI Wenbing, WAN Dong, LIU Yang, SHAO Qiutong

School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China

Received:2016-11-23 Revised:2017-03-28 Online:2017-07-05 Published:2017-07-05

摘要/Abstract

摘要： 以KOH为活化剂对焦炭进行活化制备改性焦炭，并采用原位氧化沉淀法制备出Fe₃O₄/改性焦炭，采用扫描电子显微镜（SEM）、N₂吸附脱附（BET）、傅里叶交换红外光谱（FTIR）、X射线衍射（XRD）及振动样品磁强计（VSM）对样品进行表征，并且研究了其对罗丹明B的催化降解性能。结果表明，改性焦炭表面粗糙，孔结构发达，含氧官能团丰富，Fe₃O₄分散且牢固地负载于改性焦炭上，其粒径比纯Fe₃O₄小。Fe₃O₄/改性焦炭具有超顺磁性，对罗丹明B的降解为拟一级反应，其降解的最佳条件为：催化剂用量为0.8g/L，H₂O₂初始浓度为30mmol/L，pH为3.0，温度为35℃。Fe₃O₄与改性焦炭存在协同催化作用，罗丹明B的去除率可达98.85%。Fe₃O₄/改性焦炭是一种稳定、易磁分离回收利用的磁性催化剂。

关键词: 改性焦炭, 磁性催化剂, 类Fenton, 降解, 稳定性

Abstract: Modified coke was firstly prepared from coke by KOH activation and then Fe₃O₄/modified coke was prepared by in-situ oxidation precipitation method.The catalyst and samples were characterized by scanning electron microscopy (SEM),nitrogen adsorption isotherms (BET),Fourier transform infrared spectroscopy (FTIR),X-ray powder diffractometer (XRD) and vibrating sample magnetometer (VSM),and the catalytic degradation performance of Rhodamine B (RhB) was studied.The results show that the modified coke has rough surface and well-developed pore structure.Moreover,the oxygen-containing functional groups of modified coke are abundant.Fe₃O₄ was dispersed and firmly loaded on the modified coke,making the latter is smaller than the pure Fe₃O₄.Fe₃O₄/modified coke possessed superparamagnetism,and its degradation of RhB could be regarded as pseudo first-order reaction.The best degradation conditions were as follow:[catalysts]=0.8g/L,initial[H₂O₂]=30mmol/L,pH=3.0 and T=35℃.There is a synergistic effect between Fe₃O₄ and modified coke,giving rise to the removal rate of RhB of 98.85%.Therefore,Fe₃O₄/modified coke is a magnetic catalyst with good stability and recyclability.

Key words: modified coke, magnetic catalyst, Fenton-like, degradation, stability

中图分类号:

TQ426.8

魏晓币, 王光华, 李文兵, 万栋, 刘阳, 邵秋桐. 磁性Fe₃O₄/改性焦炭的制备及其降解性能[J]. 化工进展, 2017, 36(07): 2577-2583.

WEI Xiaobi, WANG Guanghua, LI Wenbing, WAN Dong, LIU Yang, SHAO Qiutong. Preparation and degradation properties of magnetic Fe₃O₄/modified coke[J]. Chemical Industry and Engineering Progress, 2017, 36(07): 2577-2583.

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磁性Fe₃O₄/改性焦炭的制备及其降解性能

Preparation and degradation properties of magnetic Fe₃O₄/modified coke

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