磷酸锆/介孔密胺树脂复合吸附材料的制备及性能研究

Study on preparation and property of Zr(HOP_(4))_(2) and mesoporous melamine resin as composite sorbent

将介孔密胺树脂与无定形磷酸锆复合制得一种广谱性复合吸附材料,考察了复合吸附材料对SO_(2)和NH_(3)的吸附性能,采用X射线衍射仪、X射线光电子能谱仪、傅里叶变换红外光谱仪、热重分析仪和扫描电子显微镜等对复合吸附材料的结构、形貌、热稳定性进行表征。结果表明:介孔密胺树脂呈网状多孔交联形貌,比表面积为548.81m^(2)/g、孔径为9.25nm;随着磷酸锆含量的增加,复合吸附材料的比表面积下降至103.48~216.03m^(2)/g,孔径缩小50%。与单一吸附材料相比,复合吸附材料对2种有毒气体的吸附能力提高了数倍,推测NH_(3)的吸附位主要是P—OH,而SO_(2)的吸附位是锆元素和氮元素,可满足应急事故处理和防护需要。

A composite broad-spectrum adsorbent was prepared via uniformly combining the zirconium phosphate[Zr(HOP_(4))_(2)]with the mesoporous melamine resin.The adsorption properties on SO_(2) and NH_(3) were investigated simultaneously and its characteristics were achieved by XRD,XPS,N_(2)-adsorption,FT-IR,TG and SEM.The results shown that the mesoporous melamine resin was observed with a network cross-linked morphology.The specific surface area was 548.81m^(2)/g and the average pore diameter was 9.25nm.The specific surface area decreased to 103.48~216.03m^(2)/g after the introduction of zirconium phosphate,and the pore size was reduced by about 50%.The mesoporous composite adsorbent represented the distinguished absorption on both toxic gases as several times as any single one.Its adsorption capacity was also better than them in previous reports.It can be concluded that the adsorbing sites of NH_(3) were mainly P—OH,and the adsorbing sites of SO_(2) ware zirconium and nitrogen elements.Thus these nanocomposite absorbents might be applied for emergency treatment and military protection.