Low‐dimensional bismuth(III) iodide hybrid material with high activity for the fast removal of rhodamine B

Organic–inorganic hybrid lead-based perovskite crystal materials have been widely studied due to their excellent optical–electronic properties. However, the toxicity of lead limits their widespread use. Here, a lead-free perovskite-type compound, tetra­kis­(1,2,3-tri­methyl­imidazolium) di-μ3-iodido-tetra-μ2-iodido-deca­iodido­tetra­bis­muth(III), (C6H11N2)4[Bi4I16], has been successfully synthesized by a simple solvothermal method. It exhibits a zero-dimensional (0D) tetra­meric structure, including edge-sharing [Bi4I16]4− distorted octa­hedra. The band gap of 2.0 eV is close to that of (NH4)3[Bi2I9]. Degradation ability measurements were performed to examine the potential application of this material as an alternative for waste-water treatment.