Effect of Annealing on Photocatalytic Performance of BiOCL Nanosheets

Zhan Kui Cui; Li Wei Mi; Zhi Zheng; Guang Hui Wang; Wen Jun Fa

doi:10.4028/www.scientific.net/AMR.726-731.646

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Effect of Annealing on Photocatalytic Performance...

Effect of Annealing on Photocatalytic Performance of BiOCL Nanosheets

Abstract:

BiOCl nanosheets were annealed at different temperatures. The effect of annealing on structures and properties was characterized by X-ray diffraction (XRD), N₂ adsorption-desorption, UV-visible diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy (PL). The photocatalytic performance was evaluated by photodegrading Rhodamine B (RhB) under UV light irradiation. It was found oxygen vacancy defects (OVDs) could be generated during the annealing treatment and the best photocatalytic efficiency was obtained when the annealing temperature was 450 °C. The enhanced photocatalytic efficiency was ascribed to the high separation efficiency of the photogenerated electron-hole pairs due to the existence of the OVDs as positively charged centers.