The　oxygen　content　of　graphene　oxide　(GO)　is　directly　related　to　its　physical　and　chemical　properties,　such　as　hydrophilicity,　suspension　stability,　adsorption,　and　ion-sieving　ability　of　GO　membranes.　Here,　a　series　of　reduced　GO　(rGO)　with　C/　O　atomic　ratios　from　1.6　to　4.8　were　prepared　conveniently　by　electron-beam　irradiation　(EBI)　with　irradiation-dose　control.　Moreover,　a　single　oxygen-containing　group,　i.e.,　epoxy　or　carbonyl,　could　be　retained　mainly　in　the　rGO.　The　interlayer　spacing　of　rGO　could　be　changed　from　9.6　angstrom　to　7.4　angstrom　through　control　of　the　oxygen　content.　The　prepared　rGO　exhibited　an　excellent　adsorption　effect　on　Pb(II)　ions,　and　the　max　adsorption　capacity　reached　194.76　mg　g(-1)　for　rGO　with　a　low　irradiation　dose　(5　kGy),　which　showed　that　the　ratio　of　oxygen-containing　groups　is　important　for　improving　the　adsorption　of　rGO　in　aqueous　solution.　These　results　indicated　that　highly　efficient,　environmentally　friendly,　and　advanced　EBI　technology　has　good　potential　prospects　for　use　in　the　large-scale　production　of　rGO　with　precise　control　of　the　oxygen　content.