摘要
首先采用Improved Hummers法制备氧化石墨烯,而后将氧化石墨烯、硫酸亚铁和环糊精进行水热反应,经冷冻干燥处理获得三维磁性氧化石墨烯。接着通过扫描电镜、X射线衍射仪和傅里叶变换红外光谱对三维磁性氧化石墨进行了表征;最后研究了三维磁性氧化石墨烯对水体中的六价铬的吸附性能。实验结果表明,三维磁性氧化石墨烯呈黑色,疏松多孔,表面官能团丰富。在实验浓度范围内,吸附量随着六价铬初始浓度的增加而增加。当六价铬初始浓度为12 mg/L时,吸附量达到118.485 mg/g。当振荡时间为100 min时,吸附达到平衡,吸附量达到最大值39.514 mg/g。吸附量随着三维磁性氧化石墨烯量的增加而减少,当三维磁性氧化石墨烯为1 mg时,对六价铬的吸附量高达392.074 mg/g。酸性条件有利于六价铬的吸附,当pH值为2时,三维磁性氧化石墨烯对六价铬的吸附量最高为39.657 mg/g。
In this paper,the Improved Hummers Method was used to prepare GO,and then the hydrothermal reaction of graphite oxide,ferrous sulfate and cyclodextrin was carried out to obtain three-dimensional magnetic graphite oxide after freeze-drying.Then the three-dimensional magnetic graphite oxide was characterized by scanning electron microscopy,X-ray diffractometry and Fourier transform infrared spectroscopy.Finally,the adsorption property of three-dimensional magnetic graphite oxide for hexavalent chromium in water was investigated.The experimental results show that the three-dimensional magnetic graphite oxide is black,porous and has abundant functional groups on its surface.In the experimental concentration range,the adsorption capacity increased with the increase of the initial concentration of hexavalent chromium.When the initial concentration of hexavalent chromium is 12 mg/L,the adsorption capacity reaches 118.485 mg/g.When the oscillation time was 100 min,the adsorption reached equilibrium,and the maximum adsorption capacity reached 39.514 mg/g.The adsorption capacity decreased with the increase of the amount of three-dimensional magnetic graphite oxide.When the amount of three-dimensional magnetic graphite oxide was 1mg,the adsorption capacity of hexavalent chromium was up to 392.074 mg/g.Acidic conditions are favorable for the adsorption of hexavalent chromium.When the pH is 2,the maximum adsorption capacity of hexavalent chromium is 39.657 mg/g.
作者
陈程
袁阳
杨芳
谭思雨
李婉静
唐柯贞
王丽平
Chen Cheng;Yuan Yang;Yang Fang;Tan Siyu;Li Wanjing;Tang Kezhen;Wang Liping(College of Biological and Environmental Engineering,Changsha University,Changsha 410022,China)
出处
《山东化工》
CAS
2022年第8期56-59,共4页
Shandong Chemical Industry
基金
湖南省教育厅科学研究项目重点项目(18A378)
2021年湖南省大学生创新训练项目(序号:3745)资助。
