选择常规的锌、铜作为金属离子、对苯二甲酸(BDC)作为有机配体,通过溶剂热法和元素替换法合成出Zn-Cu基MOFs材料.通过XRD 、UV-Vis DRS、SEM、FT-IR、UPS和XPS等手段表征和研究,发现Zn(BDC)的光吸收位于紫外光波段(＜400 nm),而Cu(BDC)光吸收拓宽至整个可见光波段(500～1 000 nm).Zn-Cu金属离子均匀分散的产物Zn-Cu-BDC比其它产物具有更宽的光吸收范围、强度和更窄的带隙;不同的合成途径导致Zn-Cu基MOFs材料表现出性质差异.%Cu(Ⅱ) and Zn(Ⅱ) ions were selected as the basic mixed metal nodes connected by organic ligand 1,4-benzenedicarboxylic acid (BDC) and synthesized nanoporous Zn-Cu based mixed-metal MOFs Zn(BDC)-Cu,Cu (BDC)-Zn and Zn-Cu-BDC through different synthetic routes.Through characterization of PXRD,SEM,UV-Vis DRS,FT-IR,XPS and UPS and systematic analysis,it is found that the solar light absorbing range of Zn(BDC) is located in UV band (＜400 nm),while Cu(BDC) mainly absorbs the whole visible light (500～1 000 nm).Additionally,the Zn-Cu ions uniformly-dispersed product Zn-Cu-BDC performs better in light-absorption and exhibits lower photo band-gap and HOMO level than the other bi-metallic products Zn(BDC)-Cu and Cu(BDC)-Zn.The investigation might inspire the design of heterogeneous photocatalysts and organic-inorganic hybrids in the aspects of light-absorption and charge transfer and construction methods on metal exchange due to different routes leading to different properties despite of the same components.
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