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引用本文:   陈素清, 沈茂, 梁华定, 鲍明辉. 银基负载的氧化石墨烯磁性纳米复合材料的合成、表征及其对2,4-二氯酚的吸附. 分析化学, 2020, 48(7): 912-920. doi:  10.19756/j.issn.0253-3820.191723 [复制]

Citation:   CHEN Su-Qing , SHEN Mao , LIANG Hua-Ding , BAO Ming-Hui . Synthesis and Characterization of Magnetic Graphene Oxide Nanocomposites Supported Silver Matrix and Its Adsorption Property for 2,4-Dichlorophenol. Chinese Journal of Analytical Chemistry, 2020, 48(7): 912-920. doi: 10.19756/j.issn.0253-3820.191723 [复制]

银基负载的氧化石墨烯磁性纳米复合材料的合成、表征及其对2,4-二氯酚的吸附

通讯作者:  梁华定, lianghuading@tzc.edu.cn

收稿日期: 2019-12-06

基金项目: 本文系浙江省自然科学基金项目(No.LTY20B050001)和浙江省公益技术研究计划项目(No.LGC19B050006)资助

Synthesis and Characterization of Magnetic Graphene Oxide Nanocomposites Supported Silver Matrix and Its Adsorption Property for 2,4-Dichlorophenol

Corresponding author:  LIANG Hua-Ding , lianghuading@tzc.edu.cn

Received Date:  2019-12-06

Fund Project:  This work was supported by the Zhejiang Provincial Natural Science Foundation (No. LTY20B050001) and the Zhejiang Provincial Public Welfare Technology Research Project, China (No. LGC19B050006).

以溶剂热法制备得到磁性Ag/AgCl@Fe3O4@GO纳米复合材料,利用透射电镜(TEM)、扫描电镜(SEM)、X射线能谱(EDX)和N2吸附-脱附对样品的结构和形貌进行测试表征,研究了材料对水溶液中2,4-二氯酚(2,4-DCP)的吸附性能。此纳米复合材料由具有介孔结构的球形磁性纳米颗粒Ag/AgCl@Fe3O4负载在一层带褶皱的氧化石墨烯表面制备而成,平均孔径Sp为13.98 nm,比表面积为46.91 m2/g,孔体积为0.1791 cm3/g。Ag/AgCl@Fe3O4@GO复合材料对2,4-DCP的吸附实验表明,对于20 mg/L 2,4-DCP溶液,20 min基本达到吸附平衡,吸附量为13.74 mg/g;吸附以拟二级动力学模型为主导,相关系数为0.9995;吸附符合Langmuir模型,相关系数为0.9841~0.9972,为单分子层吸附;吸附热力学参数ΔG分别为-5.0462 kJ/mol(293 K)、-4.4076 kJ/mol(303 K)、-3.7522 kJ/mol(313 K)、-3.4358 kJ/mol(323 K),ΔH为-17.1653 kJ/mol,ΔS为-42.2158 J/(mol·K)。吸附过程为放热熵减小的自发过程,温度越低,越利于吸附,具有物理吸附特征。此复合材料具有较好的吸附活性,还可通过外加磁场的方式实现回收再利用。

关键词:   2,4-二氯酚, 氧化石墨烯, 磁性纳米复合材料, 孔隙结构, 吸附性能
Key words:   2,4-Dichlorophenol, Graphene oxide, Magnetic nanocomposites, Pore structure, Adsorption properties
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目录

银基负载的氧化石墨烯磁性纳米复合材料的合成、表征及其对2,4-二氯酚的吸附

陈素清, 沈茂, 梁华定, 鲍明辉

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