关键词: RGO-BiOBr纳米复合体, 磷酸修饰, 光生电荷性质, 光电化学

Abstract:

The RGO-BiOBr nanocomposites have been successfully synthesized by a hydrothermal process, and then modified with phosphorous acids. The photoelectrochemical properties of the fabricated RGO-BiOBr nanocomposite films were studied. The results indicate that the photocurrent densities of RGO-BiOBr were much larger compared with those of the bare BiOBr, and interestingly, the photocurrent densities were further improved after phosphate modification. Based on the analyses of the produced hydroxyl radical amounts, the enhanced photocurrent densities could be attributed to the introduction of RGO and to the formed negative fields of modified phosphate groups, which are favorable for electrons to be transferred and for holes to be trapped, respectively, leading to promoted charge separation.

Key words: RGO-BiOBr nano-composite, Phosphoric acid modification, Photogenerated charge property, Photoelectrochemistry