Synthesis, crystal structure, photoelectric and photocatalytic properties of (C 4 H 14 N 2 ) 0.5 Cu 2 SbSe 3 with a two-dimensional layered structure

A selenoantimonate (C 4 H 14 N 2 ) 0.5 Cu 2 SbSe 3 (1) (C 4 H 12 N 2 = 1, 4-butanediamine) was synthesized by solvothermal synthesis using 1, 4-butanediamine as solvent. By single-crystal X-ray diffraction, compound 1 has a twodimensional (2-D) layered structure composed of a protonated organic amine [(C 4 H 14 N 2 ) 0.5 ] + and an anionic layer [Cu 2 SbSe 3 ] - containing the 6-membered rings (6 -MR) Cu 2 SbSe 3 and the 10-membered rings (10 -MR) Cu 3 Sb 2 Se 5 . Solid -state UV-diffuse reflectance analysis showed that 1 has a band gap value of 1.85 eV, indicating its potential semiconducting properties. This paper studied the photodegradation properties of selenoantimonate containing the transition metal Cu for the first time, and found that its degradation rate methylene blue (MB) was 68.5 %. In addition, a series of characterizations were also performed.