Magnetically　recyclable　porous　sodium　dodecyl　sulfate　(SDS)/Fe2O3　hybrids,　which　combine　the　porous　structure　of　Fe2O3　and　hydrophobicity　of　SDS,　have　been　successfully　synthesized　for　the　first　time.　Porous　Fe2O3　has　been　first　pyrolyzed　from　MIL-100(Fe)　using　a　simple　two-step　calcination　route.　Then,　the　obtained　porous　Fe2O3　nanoparticles　have　been　self-assembled　with　SDS　molecules　and　yielded　hydrophobic　SDS/Fe2O3　hybrids.　The　porous　SDS/Fe2O3　hybrids　have　been　demonstrated　to　be　highly　efficient　for　the　denitrification　of　pyridine　under　visible　light　irradiation.　The　pyridine　removal　ratio　has　reached　values　as　high　as　100%　after　irradiation　for　240　min.　Combining　the　results　of　a　series　of　experimental　measurements,　it　was　concluded　that　the　superior　photocatalytic　performance　of　SDS/Fe2O3　hybrids　could　be　attributed　to　(i)　the　fast　electron　transport　owing　to　the　unique　porous　structure　of　Fe2O3,　(ii)　the　superior　visible　light　absorption　of　Fe2O3　nanoparticles,　and　(iii)　the　＂bridge　molecule＂　role　of　SDS　efficiently　improving　the　separation　and　transfer　across　the　interfacial　domain　of　SDS/Fe2O3　of　photogenerated　electron-hole　pairs.　More　significantly,　after　the　catalytic　reaction,　the　SDS/Fe2O3　hybrids　could　be　easily　recovered　using　magnets　and　reused　during　subsequent　cycles,　which　indicated　their　stability　and　recyclability.　(C)　2020,　Dalian　Institute　of　Chemical　Physics,　Chinese　Academy　of　Sciences.　Published　by　Elsevier　B.V.　All　rights　reserved.