Synthesis of bismuth oxide: Removal of benzene from waters by bismuth oxide nanostructures

In this research, the bismuth oxide (Bi۲O۳) nanostructures were prepared via chemical method at ۹۰ °C for ۳ h. the results samples were characterized by Fourier transform infrared (FTIR) for determination of functional groups, X-ray diffraction (XRD) for evaluation of crystal structure, dynamic light scattering (DLS), scanning electron microscope (SEM) for presentation of morphology and size, energy-dispersive X-ray spectroscopy (EDS) for determination of chemical composition, and diffuse reflection spectroscopy (DRS) for ultraviolet (UV) blocking. Also, the Bi۲O۳ nanostructures were used for benzene extraction from waters in pH=۵-۷. By procedure, ۳۰ mg of Bi۲O۳ mixed with hydrophobic ionic liquid ([HMIM][PF۶]) and injected to water samples. After shaking and centrifuging, benzene removed from water by ionic liquid-micro solid phase extraction (IL-μSPE) and determined by gas chromatography with flame ionization detector (GC-FID). The absorption capacity and recovery was obtained ۱۶۷.۸ mg per gram of Bi۲O۳ and more than ۹۶%, respectively. Based on the results, the bismuth oxide nanostructures were observed with rod morphology and the diameter of nanometer. The antibacterial activities of the samples were determined against Salmonella using inhibition zone diameter. Based on the study, bismuth oxide nanostructures have good potential for removal of benzene from waters. By IL-μSPE method, the results validated by spiking of samples

Keywords:

Bismuth oxide nanostructures , Synthesis , Benzene removal , Waters , Liquid-micro solid phase extraction