Teng Fei, Zhu Yongfa, He Gang, Gao Guizhi, Meng Dennis Desheng
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引用次数: 2
Abstract
A network of ZrO2 nanorods was prepared using the porous biomembranes as templates. The sample was char- acterized by SEM, XRD and nitrogen physicosorption isotherm. ZrO2 nanoparticles were also prepared with a hydrother- mal method in order to compare with this network. The results showed that after being calcined at 800 o C for 24 h, a vol- ume contraction of ZrO2 nanorod network occurred accompanied by a phase transformation of tetragonal-to-monoclinic ZrO2; but the nanoparticles have grown into the large microparticles; as a result, ZrO2 nanorod network has a higher BET area (45.7 m 2 g -1 ) and a larger pore volume (0.20 cm 3 g -1 ). The calcined network showed a higher cataluminescence (CL) intensity of CO oxidation and a higher combustion activity than the calcined particles, which was ascribed its high surface area, as well as advanced pores.
以多孔生物膜为模板制备了ZrO2纳米棒网络。采用SEM、XRD和氮气物理吸附等温线对样品进行了表征。为了与该网络进行比较，还采用水热法制备了纳米ZrO2。结果表明:在800℃下煅烧24 h后，ZrO2纳米棒网络发生体积收缩，ZrO2由四边形向单斜晶相转变;但是纳米颗粒已经长成了大的微粒;因此，ZrO2纳米棒网络具有更高的BET面积(45.7 m 2 g -1)和更大的孔隙体积(0.20 cm 3 g -1)。煅烧网络比煅烧颗粒表现出更高的CO氧化催化发光强度和更高的燃烧活性，这归因于其高表面积和超前孔隙。
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