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基于介孔硅材料,在其表面掺杂牛血清白蛋白,构建了一种可实现贵金属纳米材料原位制备的蛋白掺杂介孔材料MCM-BSA。通过紫外、红外、吸脱附、透射电镜等表征手段,表明掺杂后的材料兼有蛋白和介孔硅2种特性。以MCMBSA为载体,即可原位还原氯金酸制备金纳米粒,获得负载金纳米粒的复合材料GNPs@MCM-BSA。以对硝基苯酚的催化还原为模型反应,考察了掺杂蛋白介孔硅负载的金纳米粒的催化性能,发现其具有很好的对硝基苯酚催化能力。更为重要的是,该复合材料可回收循环利用6次以上,对硝基苯酚的转化率都接近100%,表明掺杂蛋白介孔硅是一类性能优异的新型纳米晶载体,可应用于环境污染物的催化还原。
Based on the mesoporous silica material, the surface of which is doped with bovine serum albumin, a protein-doped mesoporous material MCM-BSA that can realize in-situ preparation of noble metal nanomaterials is constructed. By UV, IR, adsorption and desorption, transmission electron microscopy and other means of characterization, indicating that the doped material has both protein and mesoporous silica characteristics. Using MCMBSA as carrier, gold nanoparticles were prepared in situ for the reduction of gold nanoparticles to obtain GNPs @ MCM-BSA loaded with gold nanoparticles. With the catalytic reduction of p-nitrophenol as a model reaction, the catalytic properties of the doped protein mesoporous silica supported gold nanoparticles were investigated and found to have good catalytic activity for p-nitrophenol. More importantly, the composites can be recycled for more than 6 times, and the conversion of p-nitrophenol is close to 100%, indicating that the doped protein mesoporous silica is a new type of nanocrystalline carrier with excellent properties and can be applied to Catalytic reduction of environmental pollutants.