化学
亚甲蓝
降级(电信)
光催化
金属有机骨架
金属
光化学
亚甲基
有机化学
催化作用
吸附
电信
计算机科学
作者
Zhenzhen He,Dan Ma,Bingran Cao,Xiaoqin Li,Ying Lü
标识
DOI:10.1016/j.ica.2017.10.034
摘要
A series of metal-organic frameworks built from Keggin and Wells–Dawson polyoxometalates were obtained at different pH values under hydrothermal conditions, namely, [H2bimb]1.5[Co(bimb)1.5(H2O)(BW12O40)]·4H2O (1), [H2bimb]1.5[Ni(bimb)1.5(H2O)(BW12O40)]·4H2O (2), K[H2bimb][Cu(bimb)(BW12O40)]·2H2O (3) and H2[Ni(bimb)2(bimbp)0.5(H2O)2][P2W18O62]0.5·3H2O (4) (bimb = 1,4-bis(1-imidazoly)benzene, bimbp = 4,4′-bis(imidazolyl) biphenyl). All of the compounds have been structurally characterized by elemental analysis, IR, TG, XRD and single-crystal X-ray diffraction. Compounds 1 and 2 exhibit an interesting network, in which each BW12 anion as double-dentate inorganic ligand link two adjacent Co/Ni-bimb chains to form a wave-type two-dimensional (2-D) plane. Compound 3 displays a 3D structure constructed from CuII–BW12 sheets and bimb organic ligand with 1D channels. Compound 4 displays a one-dimensional (1D) polypendant chain with P2W18 anions as templates. It is noteworthy that the bimb ligand was in situ transformed into bimbp ligand during the synthesis of 4, and both bimb and bimbp ligands take part in the construction of the structure of 4. Photocatalytic investigation indicates that compounds 1–3 are highly active for the degradation of methylene blue under UV irradiation. In addition, electrochemical properties and electrocatalytic activities of compounds 1–3 have been investigated in detail.
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