Tubular　In2O3@SnIn4S8　hierarchical　hybrid　photocatalyst　was　firstly　fabricated　by　a　two-step　method.　The　morphology　and　composition　were　characterized　by　scanning　electron　microscope　(SEM),　X-ray　photoelectron　spectroscopy　(XPS),　and　X-ray　diffraction　(XRD).　The　XRD　results　show　that　the　obtained　In2O3　microtubes　were　highly　crystallized,　while　the　SnIn4S8　flakes　prepared　at　low　temperature　were　poorly　crystallized.　The　SEM　image　of　the　hybrid　shows　that　numerous　SnIn4S8　nanoflakes　were　assembled　over　the　surface　of　In2O3　microtubes.　In2O3　served　as　dispersing-templates　have　reduced　the　agglomeration　of　SnIn4S8　flakes.　Meanwhile,　the　heterojunctions　formed　at　the　interfaces　between　In2O3　and　SnIn4S8　could　facilitate　the　interfacial　charge　transfer,　as　well　as　promote　the　photocatalytic　activity　of　the　hybrid.　In　the　treatment　of　Cr(VI)-containing　wastewater,　the　In2O3@SnIn4S8　hybrid　not　only　exhibited　strong　adsorption　ability,　but　also　showed　remarkably　enhanced　photocatalytic　activity　compared　with　pure　SnIn4S8.　The　photocatalytic　reaction　constant　k　for　In2O3@SnIn4S8　was　approximately　2.54　times　higher　than　that　of　SnIn4S8.　The　efficient　activity　of　this　hybrid　photocatalyst　should　be　ascribed　to　the　promoted　separation　efficiency　of　electron/hole　pairs,　which　was　proved　by　the　following　three-dimensional　excitation-emission　matrix　fluorescence　spectra　(3D　EEMs),　photocurrent　responds,　and　EIS　characterizations.　(C)　2021　Elsevier　Inc.　All　rights　reserved.