Solvothermal synthesis, structure and characterizations of multinary metals selenidoarsenate

Abstract

In recent years, more and more researchers have begun to explore in depth due to the potential application of chalcogenidometallates in the field of photocatalysis. In this study, a multinary metals selenidoarsenate [Ni(1,2-dap)₃][HgAs₂Se₄] (1,2-dap = 1,2-diaminopropane) (1) was synthesized by solvothermal method. It was a one-dimensional (1-D) chain structure and consisted of transition metal complex [Ni(1,2-dap)₃]²⁺ and [HgAs₂Se₄]^2- anionic chain, in which the [HgAs₂Se₄]^2- anionic chain were composed of [HgSe₄] tetrahedra and As₂⁴⁺ dimers by As-Se bond. We studied the photoelectric performance of compound 1 and suggested that 1 had a fast response and good reproducibility. The UV–visible diffuse reflection spectra was tested and the band gap of 1 was 2.24 eV, which indicated that this compound has potential semiconductor properties. It is worth that we investigated the photodegradation efficiency of 1 and it value reached 71.4 % when degrading crystal violet (CV) after irradiation, which suggested that 1 had excellent photocatalytic performance. In addition, other properties have been investigated.