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采用溶剂热合成法,利用对苯二甲酸(1,4-bdc)分别与三乙烯二胺(dabco)、均苯三甲酸(1,3,5-btc)作为配体,合成了Zn_2(bdc)_2(dabco)和Zn_3(bdc)(btc)_2两种双配体金属有机骨架材料,运用XRD、TGA、N_2吸附等手段对其进行表征。Zn_2(bdc)_2(dabco)在温度为100℃条件下获得相对结晶度最高的样品,Zn_3(bdc)(btc)_2在温度为150℃条件下获得相对结晶度最高的样品。以热重分析数据为依据,将样品在373K温度下活化,在77K温度下进行储氢测试,测得其在5bar压力下的储氢量分别为2.59wt%、0.38wt%。
In this paper, Zn_2 (bdc) was synthesized by solvothermal synthesis method using 1,4-bdc and dabco and 1,3,5-btc as ligands respectively. ) _2 (dabco) and Zn_3 (bdc) (btc) _2 were characterized by XRD, TGA and N_2 adsorption. Zn2 (bdc) _2 (dabco) samples with the highest relative crystallinity were obtained at 100 ℃, Zn_3 (bdc) (btc) _2 samples with the highest relative crystallinity were obtained at a temperature of 150 ℃. Based on the thermogravimetric analysis data, the sample was activated at 373K and hydrogen storage was tested at 77K. The hydrogen storage capacity of the sample was 2.59wt% and 0.38wt% respectively under the pressure of 5bar.