【摘要】：本文采用貴金屬誘導(dǎo)還原法制備了一種Ni端尺寸可調(diào)的Au-Ni雙金屬納米顆粒.該反應(yīng)以十八胺為還原劑,硝酸鎳和氯金酸為反應(yīng)物,反應(yīng)中Au3+首先被還原成Au0,隨著溫度上升,Ni2+從Au0獲得電子而被還原成Ni0,十八胺持續(xù)提供電子,得到了雪人狀的Au-Ni雙金屬納米顆粒.采用I2/KI水溶液和0.5%(質(zhì)量分?jǐn)?shù))鹽酸分別對(duì)Au端和Ni端進(jìn)行擇性蝕刻,通過調(diào)節(jié)蝕刻時(shí)間,連續(xù)調(diào)控兩端尺寸,可以達(dá)到完全刻蝕,最終制備了一種兩端尺寸比例連續(xù)可調(diào)的Au-Ni雙金屬納米顆粒.蝕刻后得到的新鮮表面為進(jìn)一步功能復(fù)合提供了反應(yīng)場(chǎng)所.
[Abstract]:In this paper, a kind of Au-Ni bimetallic nanoparticles with adjustable end size of Ni was prepared by noble metal induced reduction method. In this reaction, with octadecylamine as reducing agent, nickel nitrate and chlorauric acid as reactants, Au3 was first reduced to Au0, with increasing temperature, and Ni2 was reduced from Au0 to Ni0, octadecylamine to continuously supply electrons. The snowman-like Au-Ni bimetallic nanoparticles were obtained. I2/KI aqueous solution and 0.5% (mass fraction) hydrochloric acid were used to selectively etch the Au and Ni terminals respectively. By adjusting the etching time and continuously adjusting the size of the two ends, the complete etching could be achieved. Finally, a kind of Au-Ni bimetallic nanoparticles with continuously adjustable ratio of two ends was prepared. The fresh etched surface provides a reaction site for further functional recombination.
【作者單位】： 中國(guó)科學(xué)院化學(xué)研究所高分子物理與化學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):51233007)資助~~
【分類號(hào)】：TB383.1

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