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Materials Research

versão impressa ISSN 1516-1439versão On-line ISSN 1980-5373

Resumo

LV, Yaohui et al. Facile Preparation and Characterization of Nanostructured BiOI microspheres with certain adsorption-photocatalytic properties. Mat. Res. [online]. 2018, vol.21, n.3, e20170705.  Epub 12-Abr-2018. ISSN 1980-5373.  https://doi.org/10.1590/1980-5373-mr-2017-0705.

A novel adsorbent based nanostructured bismuth oxyiodide (BiOI) microspheres combining the highly effective adsorption and green photocatalytic regeneration were fabricated by a facile and rapid low-temperature chemical bath method. The resultant products were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Nitrogen adsorption-desorption measurements, and UV-Vis diffuse reflectance spectroscopy (DRS). The BiOI microspheres displayed remarkable performance towards removal of Rhodamine B (RhB) and Cr (VI) from aqueous solution, showing a maximum adsorption capacity reached up to 40.78 mg g-1 and 38.01 mg g-1, respectively. The kinetics and equilibrium of adsorption process were found to follow the pseudo-second-order kinetic and Langmuir isotherm models. Notably, the BiOI microspheres have excellent photocatalytic regeneration capability due to their intrinsically prominent photoresponse in visible light region. By meaning of providing a new insight into the design of new generation adsorbent that could combine adsorption and solar-driven photocatalysis, the synthesized BiOI microspheres are very promising for the large-scale industrial application for water treatment.

Palavras-chave : Bismuth oxyiodide; Adsorption; Photocatalysis; Environmental remediation.

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