In this paper, ZIF-11 material was synthesized from benzimidazole and different zinc salt sources at room temperature. The obtained samples were characterized using XRD, SEM, FTIR and TGA measurements. The results showed that the synthesized materials had nano-size, and uniformity with the sharp dodecahedrons structure of ZIF-11. Zinc sources had an influence on the size and nature of the ZIF-11 crystal. The average crystalline size of the nanoparticles calculated by Scherrer equation were 85.5 nm for sample of zinc nitrate, 91.9 nm for sample of zinc chloride and 111.5 nm for sample of zinc acetate. The obtained samples had high thermal stability ( 460 °C). The adsorption capacity of the synthesized materials for iodine from aqueous solution was very high (236 mg/g).

In this paper, ZIF-11 materials were synthesized from benzimidazole (BIm) and zinc acetate in different solvent systems at room temperature. The obtained samples were characterized using XRD, SEM, FTIR and TGA measurements and tested for toluene and iodine adsorption ability. The results show that the synthesized materials had nano-size, and uniformity with the sharp rhombic dodecahedrons structure of ZIF-11. The studied solvent systems almost did not affect the crystal size of the materials, but had an small influence on their thermal stability and the toluene adsorption ability. The samples synthesized in methanol-toluene and ethanol-toluene solvent systems had higher thermal stability than those synthesized in ethanol-xylene and ethanol-benzene solvent systems. The obtained materials had high adsorption ability for toluene. Adsorption capacity reached 303.5 mg/g, 306.1 mg/g, 295.6 mg/g and 279.7 mg/g for the materials synthesized in methanol-toluene, ethanol-toluene, ethanol-xylene and ethanol-benzene solvent systems, respectively. The samples also had high adsorption ability for the iodine from aqueous solution and the studied solvent systems almost did not affect iodine adsorption ability of the materials.