氧化石墨烯/羧甲基纤维素/四氧化三铁磁性复合微球的吸附性能及其在染料废水净化中的应用
The Adsorption Capacity of GONs/CMC/Fe₃O₄ Magnetic Composite Microspheres and Applications for Purifying Dye Wastewater.
作者信息
Lv Shenghua, Zhu Linlin, Li Ying, Jia Chunmao, Sun Shiyu
机构信息
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
出版信息
Materials (Basel). 2017 Jan 11;10(1):58. doi: 10.3390/ma10010058.
Graphene oxide nanosheets (GONs)/carboxymethyl chitosan (CMC)/Fe₃O₄ magnetic composite microspheres (MCMs) were prepared by enclosing Fe₃O₄ particles with CMC and GONs in turn. The microstructures of GONs and GONs/CMC/Fe₃O₄ MCMs were characterized by FTIR, XRD, TEM, and SEM. The effects of GON content, pH value, and adsorption time on the adsorption capacity of the MCMs were investigated. The results show that the GONs/CMC/Fe₃O₄ MCMs have a greater specific surface area and a strong adsorption capacity for dye wastewater. Meanwhile, the adsorption mechanism was investigated, and the results accorded with the pseudo-second-order kinetic model and the Freundlich isotherm model. The search results indicate that GONs/CMC/Fe₃O₄ MCMs can be used to purify dye wastewater and has an important potential use in the practical purification of dye wastewater.
通过依次用羧甲基壳聚糖（CMC）和氧化石墨烯纳米片（GONs）包裹四氧化三铁（Fe₃O₄）颗粒，制备了氧化石墨烯纳米片/羧甲基壳聚糖/四氧化三铁磁性复合微球（MCMs）。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）对GONs和GONs/CMC/Fe₃O₄ MCMs的微观结构进行了表征。研究了GONs含量、pH值和吸附时间对MCMs吸附容量的影响。结果表明，GONs/CMC/Fe₃O₄ MCMs具有较大的比表面积和对染料废水较强的吸附能力。同时，对吸附机理进行了研究，结果符合准二级动力学模型和Freundlich等温线模型。研究结果表明，GONs/CMC/Fe₃O₄ MCMs可用于净化染料废水，在染料废水的实际净化中具有重要的潜在应用价值。
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