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Preparation of mesoporous Al-MCM-41 from natural palygorskite and its adsorption performance for hazardous aniline dye-basic fuchsin
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2016-04-20 , DOI: 10.1016/j.micromeso.2016.04.025
Yuan Guan , Shaomang Wang , Xin Wang , Cheng Sun , Yongbo Wang , Lingjie Hu

A promising mesoporous SiAl material, Al-MCM-41 was successfully prepared by alkali calcination leaching of natural palygorskite, and sequent hydrothermal synthesis coupled with calcination. The morphology, structure, surface area and pore-size distribution of the material were characterized by scanning electron microscopy, small-angle X-ray diffraction and N2 adsorption–desorption isotherms. The Al-MCM-41 possessed better crystallinity and larger specific surface area with CTAB/SiO2 mass ratio of 0.1:1, pH of 5, crystallization temperature of 110 °C, crystallization time of 12 h and calcination of 550 °C for 5 h. The Al-MCM-41 was used as an adsorbent for the removal of hazardous aniline dye-basic fuchsin from water. Adsorption kinetics and isotherms analysis indicated that adsorption of basic fuchsin onto Al-MCM-41 followed pseudo-first-order model and Langmuir adsorption isotherm. In addition, intra-particle diffusion was rate determining step of the adsorption process. The results demonstrated that the as-synthesized Al-MCM-41 had potential applications in the treatment of waste water.



中文翻译:

天然坡缕石的介孔Al-MCM-41的制备及其对有害苯胺染料碱性品红的吸附性能

Al-MCM-41是一种有前景的介孔Si Al材料,它是通过自然坡缕石的碱煅烧浸出,随后的水热合成和煅烧而成功制备的。通过扫描电子显微镜,小角X射线衍射和N 2吸附-解吸等温线表征了材料的形貌,结构,表面积和孔径分布。Al-MCM-41具有更好的结晶度和更大的CTAB / SiO 2比表面积质量比为0.1:1,pH为5,结晶温度为110°C,结晶时间为12 h,在550°C下煅烧5 h。Al-MCM-41用作吸附剂,用于从水中去除有害的苯胺染料碱性品红。吸附动力学和等温线分析表明碱性品红在Al-MCM-41上的吸附遵循拟一阶模型和Langmuir吸附等温线。另外,颗粒内扩散是吸附过程的速率确定步骤。结果表明,合成后的Al-MCM-41在废水处理中具有潜在的应用前景。

更新日期:2016-04-20
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