Synthesis and characterization of polyaniline-modified BiOI: a visible-light-response photocatalyst
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BiOI was modified by polyaniline (PANI) via a facile co-precipitation method. The as-prepared composites were characterized by powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscope, UV–Vis diffuse reflectance spectra, photocurrent–potential (I–V) curves, transient photocurrents, Electrochemical impedance, Mott–Schottky curves and room photoluminescence emission spectra. The effects of PANI/BiOI composites mass ratio on for rhodamine B (RhB) degradation efficiency under visible light irradiation were systematically investigated. Experimental results showed that the photocatalytic activity of PANI/BiOI (12.5 wt%) reached about 91% removal efficiency of RhB, which was about four times higher than pure BiOI. By capture experiment, the dominant radical during the photocatalysis degradation experiment were further ascertained.
This work was financially supported by the National Natural Science Foundation of China (21663027, 51262028, 21261021), the Science and Technology Support Project of Gansu Province (1504GKCA027), the Program for the Young Innovative Talents of Longyuan and the Program for Innovative Research Team (NWNULKQN-15-2).
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Conflict of interest
The authors declare that they have no conflict of interest.
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