Synthesis of Bi7F11O5/BiOCl nanosheets by a simple post-synthesis method and the improved charge separation by the heterojunction

Abstract

The Bi7F11O5/BiOCl heterojunction is prepared by a simple hydrothermal method using BiOCl and NH4F as the precursors. It is found that under ultraviolet light irradiation (λ ≤ 420 nm), the activity of Bi7F11O5/BiOCl is 3.3 and 6.4 times higher than that of BiOCl and Bi7F11O5 for the degradation of methyl orange (MO), respectively. The high activity is mainly attributed to the greatly improved the separation and transfer efficiency of charges. This simple post-synthesis method is useful to develop efficient photocatalysts.

Synthesis of a BiOCl1−xBrx@AgBr heterostructure with enhanced photocatalytic activity under visible light

“…Thus, it is necessary to improve the photocatalytic activity via enhancing the visible light harvest and restraining the charge combination, such as by nonmetal/metal doping or coupling with other semiconductors with suitable band gaps. [18][19][20][21][22][23][24][25][26][27][28] More recently, AgX (Cl, Br and I) has been regarded as a new photosensitive photocatalyst and has attracted much attention because of its high photocatalytic performance in organic pollutant degradation under sunlight irradiation. Due to its high absorption of visible light, AgX is the most promising candidate for coupling with other semiconductors to enhance their photocatalytic activity and stability of their composites.…”