多金属氧酸盐
化学
抗坏血酸
光电流
结晶学
电化学
铜
热重分析
带隙
半导体
无机化学
物理化学
有机化学
电极
材料科学
催化作用
光电子学
食品科学
作者
Qun Gao,Donghua Hu,Dehui Li,Minghua Duan,Yong Wu
标识
DOI:10.1016/j.ica.2018.12.001
摘要
A new tetra-CuII substituted sandwich-type mixed-metal Mo/V polyoxometalate, [NH4]13[Na(H2O)3][Cu4(AsIIIMoVI10VV4O47)2]·12H2O (1) has been synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectra, thermogravimetric (TG) analysis, X-ray photoelectron spectroscopy and elemental analyses. The polyoxoanion of 1 represents the sandwich-type framework constructed from two unprecedented {AsIIIMoVI10VV4O47} subunits linked by a rhomb-like Cu4O16 group. The novel lacunary {AsIIIMoVI10VV4O47} fragments is first observed in AsO33−-based mixed-metal Mo/V polyoxometalate systems. A series of measurements including the optical band gap, the surface photovoltage spectrum and the photocurrent response are carried out to demonstrate the semiconductor-like property of 1. The functional applications of 1 in electrochemical sensing of ascorbic acid (AA) and NO2− was also investigated in details.
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