Characterization and absorption studies of cationic dye on multi walled carbon nanotube–carbon ceramic composite
Characterization and absorption studies of cationic dye on multi walled carbon nanotube–carbon ceramic composite
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DOI：
10.1016/j.jiec.2016.09.031
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发表时间：
2017-02
影响因子：
6.1
通讯作者：
Tayebeh Esfandiyari;N. Nasirizadeh;M. Ehrampoosh;M. Tabatabaee
中科院分区：
文献类型：
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作者：
Tayebeh Esfandiyari;N. Nasirizadeh;M. Ehrampoosh;M. Tabatabaee
通过溶胶凝胶技术合成了多壁碳纳米管-碳陶瓷复合材料（MWCNT-CCC），作为制备纳米复合材料的一种有前途的策略，并用作从水溶液中去除碱性黄28染料的吸附剂。使用 FESEM、EDX、XRD 和 BET 等不同技术对 MWCNT-CC 复合材料的物理化学性能进行了表征。通过响应面法 (RSM) 研究了 pH、接触时间、初始染料浓度和吸附剂用量等操作参数的影响。在 pH 8.0、染料浓度 15.0 mg/L 和吸附剂 1.5 g/L 80 分钟时实现最佳吸附 (85%)。吸附过程可以用准二级动力学模型很好地描述。等温线实验数据遵循Freundlich等温线模型。此外，根据温度相关等温线计算的热力学参数表明吸附反应是吸热且自发的过程。所有结果表明，MWCNT-CCC 是一种有前途的吸附剂，可有效去除废水中的碱性染料。
The multi walled carbon nanotube–carbon ceramic composite (MWCNT-CCC) was synthesized by sol gel technique, as a promising strategy for the preparation of nanocomposites and used as adsorbents for removal of Basic Yellow 28 dye from aqueous solution. The physicochemical properties of MWCNT-CC composites was characterized using different techniques such as FESEM, EDX, XRD, and BET. The effects of operating parameters such as pH, contact time, initial dye concentration and amount of the adsorbents were investigated by response surface methodology (RSM). Optimum adsorption (85%) was achieved at pH 8.0, dye concentrations 15.0 mg/L, and 1.5 g/L adsorbent at 80 min. The adsorption process can be well described by the pseudo second order kinetic model. The experimental data of isotherm followed the Freundlich isotherm model. Moreover, the thermodynamic parameters calculated from the temperature-dependent isotherms indicated that the adsorption reaction was an endothermic and spontaneous process. All results indicate that the MWCNT-CCC is a promising adsorbent for the efficient removal of basic dye from wastewater.