Polytetrafluoroethylene　(PTFE)　fiber　was　grafted　with　acrylic　acid　to　impart　the　carboxyl　groups　onto　the　fiber　surface,　which　were　used　to　coordinate　with　both　transition　metal　ions　Fe(III)　and　Cu(II)　and　a　rare　metal　ion　Ce(III)　to　prepare　the　metal　grafted　PTFE　fiber　complexes　as　the　novel　heterogeneous　Fenton　catalysts　for　the　degradation　of　the　azo　dye　in　water　under　visible　irradiation.　Some　factors　affecting　the　preparation　process,　such　as　nature　and　concentration　of　metal　ions　in　the　coordination　solution,　grafting　degree　of　PTFE　and　reaction　temperature　were　optimized　with　respect　to　the　content　and　strength　of　metal　fixation　on　the　fiber　and　dye　degradation　efficiency.　The　results　indicated　that　increasing　metal　ion　concentrations　in　solution　and　grafting　degree　of　PTFE　fiber　as　well　as　higher　coordination　temperature　led　to　a　significant　increase　in　metal　content,　especially　Fe(III)　and　Cu(II)　content　of　the　complexes.　Fe(III)　ions　fixed　on　the　fiber　showed　the　better　catalytic　performance　than　Cu(II)　and　Ce(III)　ions　fixed　when　three　different　complexes　with　similar　metal　content　being　employed,　respectively.　Moreover,　Increasing　Fe　content　or　incorporation　of　Cu(II)　ions　could　significantly　improve　the　catalytic　activity　of　the　complexes.　©　2012　Zhizhong　Ding　et　al.