Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 19, Issue 12, Pages 7771-7776Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2019.16771
Keywords
BiOI; ZnWO4; Photocatalytic Activity; Visible-Light
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Funding
- Natural Science Foundation of China [21571112]
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In this work, ZnWO4/BiOI composite photocatalysts were synthesized via a facile water bath method. The photocatalysts were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffusion reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Furthermore, the photocatalytic degradation of methylene blue (MB) using ZnWO4/BiOI was studied under the irradiation of visible-light. The results showed that ZnWO4/BiOI composites displayed much higher photocatalytic activity than pure ZnWO4 and BiOI. Among all the samples, ZnWO4/BiOI with the molar ratio of 5: 5 (ZB-5) displayed the highest photocatalytic activity. The Enhancement of the photocatalytic activity primarily resulted from the effective separation of photogenerated electron-hole pairs. According to the radical scavengers experiments, O-center dot(2)- and h(+) played an important role during the degradation process.
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