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去合金化工藝對納米多孔銅孔結(jié)構(gòu)的影響
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國家自然科學(xué)基金(10804101)；等離子體物理國防科技重點(diǎn)實(shí)驗(yàn)室基金(9140C6805020806)；國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2007CB815102)


Effects of the Dealloying Process on the Morphology of Nanoporous Copper
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    摘要:

    以Mn-Cu合金為前驅(qū)體合金，在酸溶液中腐蝕去合金化成功制備出孔徑尺寸為納米量級的納米多孔銅。 研究了去合金化工藝參數(shù)中的酸溶液成分、腐蝕時(shí)間及腐蝕溫度對最終納米多孔銅孔結(jié)構(gòu)及Mn的選擇性腐蝕程度影響。結(jié)果表明：在0.1 mol/L HCl溶液中自由腐蝕去合金化后可得到孔結(jié)構(gòu)均勻的納米多孔銅；隨著腐蝕時(shí)間的延長，孔結(jié)構(gòu)有顯著變化，腐蝕2 d所得納米多孔銅樣品的孔結(jié)構(gòu)呈蜂窩狀，腐蝕5 d所得樣品的孔結(jié)構(gòu)呈均勻的三維網(wǎng)絡(luò)狀結(jié)構(gòu)，而后隨著腐蝕時(shí)間的延長，孔壁逐漸粗化；隨著腐蝕溫度升高到60 ℃，樣品中的殘余Mn含量降低明顯。通過調(diào)整去合金化工藝，實(shí)驗(yàn)所制備的納米多孔銅孔結(jié)構(gòu)呈均勻的三維網(wǎng)絡(luò)狀，孔隙率為57.7%，平均孔徑尺寸約140 nm。

    Abstract:

    Nanoporous copper with nano-scale pore size was synthesized by dealloying Mn-Cu alloy using a free corrosion method in acid solution. The effect of dealloying parameters, which include the electrolyte component, temperature and time of dealloying, on the residual Mn content and micro-morphology of nanoporous Cu was investigated. The results show that the nanoporous copper with a uniform three-dimensional pore structure can be created by dealloying in 0.1 mol/L HCl solution. The pore shape grows from honeycombs to three-dimensional networks with prolonging the corrosion time from 2 d to 5 d. Then with the continually increased corrosion time, the pore wall becomes coarse gradually. By increasing the temperature of the electrolyte to 60 oC, the residual Mn content is reduced obviously. The resultant nanoporous copper possesses uniform porous structures in three-dimensional network, the porosity of 57.7%, and the average pore size of 140 nm

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譚秀蘭,李 愷,劉 穎,吳衛(wèi)東,羅江山,唐永建.去合金化工藝對納米多孔銅孔結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2010,39(11):2011~2014.[Tan Xiulan, Li Kai, Liu Ying, Wu Weidong, Luo Jiangshan, Tang Yongjian. Effects of the Dealloying Process on the Morphology of Nanoporous Copper[J]. Rare Metal Materials and Engineering,2010,39(11):2011~2014.]
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  • 收稿日期:2009-11-25
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