The　low-usage　of　solar　energy　and　the　sluggish　separation　efficiency　of　the　photogenerated　electrons/holes　pairs　are　the　obstacles　in　the　practical　application　of　photocatalysts.　The　integration　of　upconversion　and　Z-scheme　heterojunction　is　expected　to　break　the　barriers　to　achieve　the　efficient　charge　separation　and　broaden　near-infrared　light　absorption.　Herein,　an　effective　indirect　Z　scheme　AgInS2/In2S3　heterostructure　with　carbon　quantum　dots　(CQDs,　as　the　electron　conduction　medium)　and　Lu3NbO7:Yb,　Ho　(as　upconversion　function)　has　been　successfully　synthesized.　Consequently,　the　Lu3NbO7:　Yb,　Ho/CQDs/AgInS2/In2S3　heterostructure　exhibited　superior　photocatalytic　activities　for　Cr(VI)　reduction　and　H2O2　production,　reducing　99.9%　of　Cr(VI)(20　ppm,　15　min)　and　78.5%　of　Cr(VI)　(40　ppm,　30　min)　with　visible　light　irradiation　as　well　as　94.0%　of　Cr(VI)　(20　ppm,　39　min)　under　NIR　light　irradiation.　Simultaneously,　the　heterostructure　could　generate　902.9　μM　H2O2　for　5　h　under　visible　light　irradiation.　The　intensive　photocatalytic　properties　could　primarily　be　attributed　to　the　boosted　light　absorption　capacity,　the　improved　solar-to-energy　conversion　by　the　remarkable　upconversion　capacity　of　Lu3NbO7:　Yb,　Ho/CQDs　and　the　faster　charge　transfer　through　a　Z-schematic　pathway.　This　work　is　anticipated　to　open　a　novel　＇window＇　for　designing　the　efficient　photocatalysts　by　coupling　of　Lu3NbO7:　Yb,　Ho　and　CQDs.　©　2021　Elsevier　B.V.