Abstract
Single-crystal Bi2Ga4O9 nanoplates with exposed {110} facets have been synthesized without any organic facet-controlling agents. The nanostructures and the formation process mechanism of the obtained Bi2Ga4O9 nanoplates are investigated using XRD, TEM and SEM. UV–vis DRS and VB-XPS analyses demonstrate that the CB position of Bi2Ga4O9 nanoplates is shifted up by 0.21eV compared with that of Bi2Ga4O9 particles. PL spectra and photoelectrochemical texts show that the separation efficiency of photogenerated electron-hole pairs of Bi2Ga4O9 nanoplates is higher than that of Bi2Ga4O9 particles. The enhanced photocatalytic activity of Bi2Ga4O9 nanoplates is mainly ascribed to the exposed {110} facets. PL technique and radical trapping experiments demonstrate that h+, OH and O2− are responsible for the degradation of Acid Red 1 (AR1) over Bi2Ga4O9 nanoplates.
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