Preparation of titanium peroxide and its selective adsorption property on cationic dyes
Preparation of titanium peroxide and its selective adsorption property on cationic dyes
复制标题
过氧化钛的制备及其对阳离子染料的选择性吸附性能
DOI：
10.1016/j.apsusc.2013.12.011
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发表时间：
2014-02
影响因子：
6.7
通讯作者：
Liu, Xing-juan
中科院分区：
文献类型：
--
作者：
Wang, Bo;Bi, Qiang;Dong, Li-li;Liu, Xing-juan
以硫酸钛和H2 O2为原料制备了过氧化钛粉体，并对阳离子染料进行了选择性吸附。采用X射线衍射（XRD）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）和热重-差示扫描量热法（TG-DSC）对材料进行了表征。通过对甲基橙子（MO）、苯酚以及亚甲基蓝（MB）、孔雀石绿绿色（MG）和中性红（NR）3种阳离子染料的吸附实验，证实和评价了该树脂的选择性吸附性能。三种阳离子染料的吸附都非常快，在很短的时间内达到吸附平衡。研究了MB、MG和NR的吸附动力学。结果表明，吸附符合准二级动力学方程，在25 °C时，MB、MG和NR的饱和吸附量分别为224.37、251.38和327.61 mg/g。表征和吸附实验结果表明，吸附过程的控制机理可能是静电吸附。
Titanium peroxide powder was prepared with the reaction of titanium sulfate and H2O2and showed good selective adsorption property on cationic dyes. The obtained material was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and thermogravimetric and differential scanning calorimetry (TG-DSC). The selective adsorption property was confirmed and evaluated by adsorption experiments of methyl orange (MO), phenol and three kinds of cationic dyes including methylene blue (MB), malachite green (MG) and neutral red (NR). The adsorption was very fast and adsorption equilibrium was reached in a very short time for all three cationic dyes. The adsorption kinetics of MB, MG and NR were studied then. It was found that the adsorption data fitted perfectly with the pseudo-second-order kinetics and the saturated adsorption capacities for MB, MG and NR were 224.37, 251.38 and 327.61 mg/g at 25 °C, respectively. The characterization and adsorption results indicated the controlling mechanism of adsorption processes could be electrostatic adsorption.
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