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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (6): 065506.doi: 10.1088/2058-6272/aaabb5

• Plasma Technology • Previous Articles     Next Articles

Effect of inductively coupled plasma surface treatment on silica gel and mesoporous MCM-41 particles

 

J A JUAREZ-MORENO1, U CHACON-ARGAEZ1, J BARRON-ZAMBRANO1, C CARRERA-FIGUEIRAS1, P QUINTANA-OWEN2, W TALAVERA-PECH1, Y PEREZ-PADILLA1 and A AVILA-ORTEGA1
  

  

  1.   1 Facultad de Ingeniería Química—UADY, Periférico Norte Kilómetro 33.5, Col. Chuburna de Hidalgo Inn, C.P. 97203, Mérida, Yucatán, México
     2 Centro de Investigación y de Estudios Avanzados del IPN—Unidad Mérida Km. 6 Antigua carretera a Progreso Apdo. Postal 73, Cordemex, 97310, Mérida, Yucatán, México
  • Received:2017-11-28 Published:2018-01-30
  • Supported by:

    This work was supported by CONACYT Ciencia Básica project 176544. SEM and XPS measurements were per-formed at LANNBIO Cinvestav Mérida, under support from projects FOMIX-Yucatán 2008-108160, CONACYT LAB-2009-01 No. 123913.

Abstract:

 Silica gel and MCM-41 synthesized mesoporous materials were treated with either oxygen (O2), hexamethyldisiloxane (HMDSO) and organic vapors like ethanol (EtOH), and acrylonitrile (AN) inductive plasma. The radiofrequency power for the modification was fixed to 120 W and 30 min, assuring a high degree of organic ionization energy in the plasma. The surface properties were studied by infrared spectroscopy (FTIR), scanning electron microscopy, x-ray photoelectron spectroscopy and dynamic light scattering technique was used for characterizing size distributions. When the silica and MCM-41 particles were modified by AN and HMDSO plasma gases, the surface morphology of the particles was changed, presenting another color, size or shape. In contrast, the treatments of oxygen and EtOH did not affect the surface morphology of both particles, but increased the oxygen content at the surface bigger than the AN and HMDSO plasma treatments. In this study, we investigated the influence of different plasma treatments on changes in morphology and the chemical composition of the modified particles which render them a possible new adsorbent for utilization in sorptive extraction techniques for polar compounds.

Key words: silica, MCM-41 nanoparticles, plasma treatment