Synthesis and Evaluation of Surface Molecular Imprinted Potassium Tetratitanate Whisker for Dibenzothiophene
HUANG Wei-Hong1,ZHOU Wei1,XU Wan-Zhen1,XU Ping-Ping2,XU Xiang-Jun1,YAN Yong-Sheng2 1(School of the Environment,Jiangsu University,Zhengjiang 212013)2(School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013)
A novel surface molecular imprinted material based on modification of potassium tetratitanate whisker has been successfully synthesized with dibenzothiophene(DBT) as template,4-vinyl pyridine(4-VP) as functional monomer,potassium tetratitanate whisker(K2Ti4O9) as carrier.The synthetic sorbents were characterized by using the Fourier transform infrared spectroscopy,scanning electron microscopy and nitrogen adsorption.The adsorption conditions and properties of surface-imprinted/K2Ti4O9(MIP/K2Ti4O9) for selectivity of DBT were investigated.The experimental results showed that the optimum adsorption temperature was 318 K and adsorption time was 240 min.The equilibrium adsorption amount reached 23.33 mg/g at an initial concentration of 500 mg/L;the adsorption process was described well with pseudo-second-order model,the chemisorption was dominant and the adsorption behavior was explained well with the Freundich isotherm equation,so it was a multi-molecular layer adsorption;the adsorption of DBT onto MIP/K2Ti4O9was a spontaneous,endothermic and entropy-driven process.Selective adsorption test indicated that the MIP/K2Ti4O9 was a more effective sorbent than non-imprinted/K2Ti4O9(NIP/K2Ti4O9) toward DBT.
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| Chinese Journal Full-text Database |
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