Non-noble metal thickness-tunable Bi2MoO6 nanosheets for highly efficient visible-light-driven nitrobenzene reduction into aniline

•The controllable atom-thick Bi2MoO6 nanosheets have been achieved by hydrothermal reaction.•Highly Efficient photocatalytic nitrobenzene reduction was achieved on Bi2MoO6 nanosheets.•The photocatalytic activity strongly depends on the thickness of Bi2MoO6 nanosheets.•The nitrobenzene conversion of Bi2MoO6 monolayers is higher than most of common photocatalysts.