关键词: 可见光, AgBr/BiOBr, 纳米材料, 光催化

Abstract: BiOBr nanosheets were synthesized by precipitation method at room temperature，and then the AgBr/BiOBr composite nanomaterial was obtained via an ion-exchange route.XRD，FESEM，and UV·Vis were employed to characterize the as-prepared materials.An energy-efficient and green LED lamp was used as visible light source.AgBr/BiOBr composite material showed a higher photocatalytic rate than pure BiOBr for RhB and MO degradation.The AgBr/BiOBr photocatalyst degraded RhB easier than MO.In the AgBr/BiOBr photocatalytic system，O2·- and h+ were considered to be the main active species.At the different pH conditions，AgBr/BiOBr exhibited an ideal photocatalyic activity for RhB degradation，and the highest photodegradation rate was found in the acidic condition.In the basic solution，AgBr/BiOBr showed the highest photocatalytic performance for MO degradation.The photocatalytic activity of AgBr/BiOBr decreased to different degrees after cycling runs due to the production of metallic silver in the photocatalytic process.

Key words: visible light, AgBr/BiOBr, nano-sized materials, photocatalysis