The effect of amine functional group on UiO-66-NH3+ for arsenate uptake

• Main Authors: Zu-Wei Chang, 張祖維
• Other Authors: Duu-Jong Lee
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/75dt7m

碩士 === 國立臺灣科技大學 === 化學工程系 === 105 === Recently, metal organic framework is popular research topic for scientist because it possesses high specific surface area and easy to modify. However, most of them are not stable when they are in aqueous solution for a long period except for UiO-66, one of metal organic framework, they can stay stable in aqueous solution. So compare to other MOFs, it can be applied in many ways. Besides, arsenate possess not only high affinity with some metal oxide surface but some electrostatic interaction with amine functional group. Hence, UiO-66-NH2 may possess higher maximum adsorption capacity for arsenate uptake than UiO-66. In this study, First, we would find out which kind of morphology of UiO-66-NH2 is suitable being adsorbent by DLS, SEM, nitrogen adsorption desorption isotherm. When the molar ratio of DMF and zirconium tetrachloride is 350, the size of product is about 1 micrometer and possess denser structure than other synthesis condition. Then, using XRD, FTIR, NMR and TGA to investigate whether the synthesis process for UiO-66-NH3+ can successfully synthesize it or not. Finally, measurement the adsorption capacity of UiO-66-NH2 by batch adsorption experiment. From the result, the maximum adsorption capacity of UiO-66-NH2 with 1M hydrochloride acid treatment for 6 hours is about 147mg/g. it is similar to result of UiO-66 which is 149mg/g. Moreover, the trend of the time for acid treatment and maximum adsorption capacity of UiO-66-NH3+ is in proportion. Hence, maximum adsorption capacity of UiO-66-NH3+ with longer period for acid treatment may higher than result of UiO-66.