In this work

the AgBr/GO (graphite oxide) nanocomposite catalysts were prepared by the depositionprecipitation method in the presence of cetyltrimethylammonium bromide (CTAB)

and their photocatalytic activities were evaluated by the reduction yield in the presence of CO

2

and water under visible light (λ

>

420 nm). The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that AgBr nanoparticles were well dispersed on the surface of GO supporter

which is beneficial to the transfer of photoexcited electrons from the conduction band of welldispersed AgBr to that of GO. The AgBr/GO nanocomposite had relatively high reduction yields under visiblelight irradiation for 5 h

with a methane yield of 106.11

methanol yield of 64.20

CO yield of 26.53

and ethanol yield of 10.96 μmol·g

-1



respectively. It was obvious that the catalytic activity of AgBr/GO was higher than that of AgBr. In addition

it was found that AgBr/GO photocatalyst was stable in the repeated uses under visible light. The total yields of the photocatalytic products and stability on AgBr/GO after the 5 repeated uses almost remained the same. Therefore

the AgBr/GO nanocomposite is an effective and stable visiblelightdriven photocatalyst for CO

2

photoreduction.