Preparation of Diamine-modified Ordered Mesoporous SBA-15 and Its Adsorption Property to Pb2+

Abstract

Abstract. WiththemethodHydrothermal-photosynthesis,respectivelypreparemesoporoussilica adsorbentwithdifferentcontentofdiamine-modified,5%2N-SBA-15 、 10%2N-SBA-15 、 15%2N-SBA-15 、 20%2N-SBA-15.AllmesoporousmaterialswerecharacterizedbyX-ray diffraction(XRD),Fouriertransforminfraredspectroscopy(FT-IR) 、 N2 adsorption-desorptionand scanningelectronmicroscopy(SEM).DiscussonhowthesystemfactorssuchaspHvalue,adsorption timeandadsorptiontemperatureaffectontheadsorptivepropertyofPb 2+ inthewater.Theresultis that,theoptimaladsorptiontime,adsorptiontemperature,andpHvalue,is60min,40℃,and5,wich meansmaterialshowsthebestperformanceofPb 2+ adsorptionundersuchcondition.The optimalrangeofcontentdiaminephotosynthesisedonSBA-15is10%~15%.