阳极氧化铝模板合成介孔CeO2纳米纤维及其光致发光性能

以多孔阳极氧化铝膜(AAO)为模板,将模板的纳米孔洞作为微腔反应器,以聚环氧乙烯醚-聚环氧丙烯醚-聚环氧乙烯醚三嵌段共聚物(P123)为致孔剂、Ce(NO3)3.6H2O为铈源、无水乙醇为溶剂合成前躯体,采用压力诱导的方法将前躯体注入到AAO孔道内,经加热处理后,在模板的纳米孔洞内合成了具有介孔结构的一维CeO2纳米材料。通过SEM、TEM、XRD、EDS和N2吸附-脱附进行表征,结果表明,所合成的介孔CeO2纳米纤维具有介孔结构和较大的比表面积,并考察了其光致发光性能。

Synthesis and Photoluminescence of Mesoporous CeO2 Nanofibers Using Porous Anodic Alumina as Template

Using porous anodic aluminium oxide(AAO) membrane as template,a precursor containing triblock copolymer EO20PO70EO20(P123) as porogen,Ce(NO3) 3·6H2O as the cerium source and ethanol as the solvent was loaded into the AAO nano-channels by a pressure-induced technique under vacuum.After heat treatment at 600 ℃ for 180 min and removal of AAO by NaOH,one-dimensional CeO2 nanofibers with mesoporous structure were fabricated.The obtained samples were characterized by means of SEM,TEM,XRD,EDS and N2 sorption and desorption.The results show that the CeO2 nanofibers have mesopore structure and high surface area,and good photoluminescence property.