Abstract:　The　PPy/TiO2　composites　were　synthesized　by　polymerizing　pyrrole　monomer　on　the　surface　of　TiO2　calcined　at　different　temperatures.　The　results　of　Fourier　Transform　Infrared　spectroscopy,　X-ray　diffraction,　Temperature　programmed　desorption,　X-ray　photoelectron　spectroscopy　and　Zeta　potential　showed　that　the　type　and　amount　of　the　active　groups　on　TiO2　surface　decreased　with　the　increase　of　calcination　temperature,　leading　to　a　significant　decline　in　its　adsorption　capacity　for　Acid　Red　G　(ARG)　and　Methylene　Blue　(MB).　This　also　had　a　significant　influence　on　the　physicochemical　property　and　adsorption　performance　of　PPy/TiO2.　The　prepared　PPy/TiO2　composite　exhibited　an　enhanced　adsorption　capacity　for　ARG　and　MB.　The　adsorption　ability　of　PPy/TiO2　was　the　strongest　when　TiO2　was　not　calcined　and　gradually　decreased　with　the　increase　of　the　calcination　temperature　of　TiO2.　The　PPy/TiO2　composite　without　calcination　was　chosen　to　investigate　its　adsorption　performance.　The　results　showed　that　the　adsorption　behaviors　of　ARG　and　MB　on　PPy/TiO2　were　described　by　the　pseudo-second-order　and　Langmuir　isotherm　models　with　the　maximum　adsorption　amount　of　424.75　and　439.61 mg/g　for　ARG　and　MB,　respectively.　Finally,　the　surface　chemical　properties　of　TiO2　seriously　affected　the　adsorption　performance　of　PPy/TiO2.　The　PPy/TiO2　composite　could　possess　excellent　adsorption　performance　when　the　selected　TiO2　contained　more　hydroxyl　and　carboxyl　groups.　Graphical　abstract:　[Figure　not　available:　see　fulltext.]　©　2019,　Springer　Nature　Switzerland　AG.