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机构地区:[1]常州大学石油化工学院,江苏省绿色催化与技术重点实验室,常州213164
出 处:《离子交换与吸附》2014年第1期39-48,共10页Ion Exchange and Adsorption
基 金:国家自然科学基金(No.21201026);江苏省自然科学基金(No.BK20130251);江苏省研究生培养创新工程(No.CXLX13-727)
摘 要:采用溶剂热法,将均苯三甲酸(H3BTC)与硝酸铜进行反应合成了金属-有机骨架(Metal-Organic Frameworks,MOFs)微孔材料Cu-BTC;利用原位合成法,将Cu-BTC负载到介孔/大孔二氧化硅孔道中,获得介孔CuBTC-SiO2材料。通过静态吸附实验,测定了正己烷(n-C6)、环己烷(c-C6)和正癸烷(n-C10)在Cu-BTC及CuBTC-SiO2上的吸附速率曲线,结果表明,将微孔材料Cu-BTC负载在SiO2之后,CuBTC-SiO2中既有微孔又有一定量的介孔,适量的介孔结构可减小其对正己烷的静态饱和吸附量,但增加对环己烷和正癸烷的静态饱和吸附量。实验测得CuBTC-SiO2对c-C6和n-C10都具有更大的静态饱和吸附量。因此CuBTC-SiO2材料可望应用在烷烃的吸附分离上。A Metal-Organic Frameworks (MOFs) material Cu-BTC was prepared through the solvothermal treatment of benzenetricarboxylic acid (H3BTC) and Cu(NO3)2. By in situ synthesis method, Cu-BTC was introduced as nanoparticles to the macro-/mesoporous silica. Adsorption rates and adsorption isotherms of n-hexane (n-C6), cyclohexane (c-C6), and n-decane (n-C10) on Cu-BTC and CuBTC-SiO2 were obtained by static adsorption experiments. Static capacities of each adsorbate on each adsorbent were studied. The results showed that CuBTC-SiO2 had both micropores and mesopores after Cu-BTC being supported on SiOz. The static adsorption capacity of small alkane n-C6 on CuBTC-SiO2 decreased due to the introduction of mesopores, while that of larger alkanes increased. So the static adsorption capacities of c-C6 and n-C10 on CuBTC-SiO2 were testified to be larger. Therefore, CuBTC-SiO2 could be applied to the adsorption separation of different alkanes.
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