Citation:
GE Dong-Lai, FAN Ying-Ju, YIN Long, SUN Zhong-Xi. Determination of the Adsorption of Xanthate on Mesoporous CuAl2O4 Using a Continuous Online In situ ATR-FTIR Technology[J]. Acta Physico-Chimica Sinica,
;2013, 29(02): 371-376.
doi:
10.3866/PKU.WHXB201211146
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In this study, mesoporous nano CuAl2O4 was synthesized through a coprecipitation method using simple mixed templates consisting of butylamine and dodecanol. The sample was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and nitrogen adsorptiondesorption techniques. The absorption of butyl and octyl xanthate from aqueous solution onto the synthesized mesoporous CuAl2O4 solid surfaces was studied by a continuous, online, in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) technique. The CuAl2O4 membrane used in the adsorption experiments was prepared on a germanium internal reflection element using the chemical bath deposition method. During the adsorption process, the characteristic peak height of xanthate at 1200 and 1040 cm-1 emerged and gradually increased. By monitoring changes in the peak height at 1200 cm-1, which was assigned to the stretching vibration caused by C-O-C of the adsorbed xanthate molecules, the adsorption kinetics were studied. The adsorption results show that mesoporous CuAl2O4 has a high chemisorption capacity for xanthate, which reaches 236 and 300 mg·g-1 for butyl and octyl xanthate, respectively, within 100 min. The adsorption kinetics can be described by a pseudo-second-order reaction model.
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