Ultralong and Mesoporous ZnO and γ-Al_2O_3 Oriented Nanowires Obtained by Template-assisted Hydrothermal Approach |
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引用本文: | Carminna Ottone,Vivian Farías Rivera,Marco Fontana,Katarzyna Bejtka,Barbara Onida,Valentina Cauda.Ultralong and Mesoporous ZnO and γ-Al_2O_3 Oriented Nanowires Obtained by Template-assisted Hydrothermal Approach[J].材料科学技术学报,2014,30(12):1167-1173. |
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作者姓名: | Carminna Ottone Vivian Farías Rivera Marco Fontana Katarzyna Bejtka Barbara Onida Valentina Cauda |
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摘 要: | Highly mesoporous Zn O and g-Al2O3nanowires(NWs) are both synthesized by a hydrothermal method using commercially available porous anodic aluminium oxide(AAO) as template. AAO membrane acts as template for Zn O NWs and both as template and precursor for g-Al2O3 NWs. The formation of intermediate phases of porous Zn6Al2(OH)16CO3and boehmite(g-Al OOH) were observed, both occurring during the hydrothermal synthesis of porous Zn O and g-Al2O3 NWs, respectively, and disappearing after annealing at 600 C. This novel template-assisted hydrothermal process leads to the formation of porous Zn O and g-Al2O3NWs(specific surface area of 192 m2 g 1and 263 m2 g 1, respectively), showing pore sizes around 4 nm in diameter. The influence of the reaction parameters on the nanostructure morphology was also investigated. A Zn O seed layer, deposited on the AAO channels prior to the hydrothermal synthesis, leads to more compact Zn O nanowires(99 m2 g-1) protecting the AAO host from the chemical attack of the precursor solution.
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关 键 词: | 氧化铝纳米线 氧化锌 水热法 模板 多孔阳极氧化铝 介孔 导向 水热合成 |
收稿时间: | 8 July 2014 |
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