【摘要】：本文采用貴金屬誘導還原法制備了一種Ni端尺寸可調的Au-Ni雙金屬納米顆粒.該反應以十八胺為還原劑,硝酸鎳和氯金酸為反應物,反應中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%(質量分數(shù))鹽酸分別對Au端和Ni端進行擇性蝕刻,通過調節(jié)蝕刻時間,連續(xù)調控兩端尺寸,可以達到完全刻蝕,最終制備了一種兩端尺寸比例連續(xù)可調的Au-Ni雙金屬納米顆粒.蝕刻后得到的新鮮表面為進一步功能復合提供了反應場所.
[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】： 中國科學院化學研究所高分子物理與化學國家重點實驗室;
【基金】：國家自然科學基金(批準號:51233007)資助~~
【分類號】：TB383.1

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