Designing　environmentally　friendly,　low　cost　and　efficient　photocatalysts　is　vitally　important　for　degradation　of　organic　pollutants.　Herein,　a　ternary　composite-ZnO/ACSC@TiO2,　constituted　by　activated　coconut　shell　derived　biochar　(ACSC),　TiO2　and　ZnO,　was　successfully　synthesized　by　two-step　hydrothermal　method.　It　demonstrated　that　TiO2　could　be　uniformly　wrapped　on　ACSC　surface　during　first　step　to　form　core-shell　structures　(ACSC@TiO2).　It　was　beneficial　not　only　to　enhance　adsorption　capacity　for　organic　pollutants　and　absorption　ability　for　light,　but　also　to　form　C-doped　TiO2　with　a　relatively　narrow　bandgap　to　expand　light　absorption　of　TiO2　from　UV　to　visible　light.　Subsequently,　ZnO　was　introduced　through　second　step　to　generate　type-II　heterojunctions　with　ACSC@TiO2,　which　further　reduced　bandgap　value　of　the　ternary　photocatalyst　to　promote　photogenerated　carrier　generation　and　efficiently　diminished　recombination　of　e--h+　pairs.　As　expected,　the　optimal　prepared　catalyst　with　10　wt%　of　ZnO　(10%ZnO/ACSC@TiO2)　exhibited　excellent　adsorptive　and　photocatalytic　abilities　for　removal　of　tetracycline　(TC)　and　Rhodamine　B　(RhB)　with　different　initial　concentrations.　Particularly,　its　total　removal　efficiency　for　TC　and　RhB　was　97.6%　and　99.4%,　respectively　under　300　W　xenon　lamp　irradiation　(25　mg/L　of　organic　pollutants,　1.0　g/L　catalyst　and　natural　pH　in　60　min).　Investigations　on　catalytic　mechanism　and　degradation　pathways　proved　that　10%ZnO/ACSC@TiO2　could　remove　RhB　and　TC　by　deep　degradation.　Its　enhanced　synergy　of　adsorption　and　photocatalysis　could　efficiently　accelerate　mineralization　rates　of　RhB　and　TC.　This　biomass　derived　biochar-based　ternary　composite　as　photocatalyst　with　optimized　energy　band　structures　and　microstructures　would　have　good　industrial　application　potential.　©　2024　Elsevier　Ltd