金基纳米棒的选择性腐蚀制备新颖多金属纳米结构
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- 英文论文题名：Selective Etching of Gold-Based Nanorods for Polymetallic Nanostructures
- 论文作者：郭霞 ; 杨剑
- 英文论文作者：Xia Guo ; Jian Yang ; School of Chemistry and Chemical Engineering ; Shandong University
- 年：2016
- 作者机构：山东大学化学化工学院;
- 论文关键词：无机合成 ; 反应机制 ; 贵金属 ; 纳米材料
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十七分会：纳米催化
- 语种：中文
- 分类号：TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十七分会 ; 纳米催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：128k
- 原文格式：D
- 会议级别：全国
摘要
由于巨大的比表面积,独特的电子效应和可控的几何形状,多金属纳米材料往往展现出特殊的光学性质、优异的催化性能等等。~([1])相对于广泛研究的生长控制,腐蚀方式的可控调控相对报道较少,尤其是在一维金属纳米颗粒上。~([2])这里,我们以金基纳米棒为例,通过不同的腐蚀方式,制备出多种新颖多金属纳米结构。1)以氯化铁为氧化剂,金纳米棒为反应物,通过顶端优先腐蚀过程,制备出不同长径比的金纳米棒;2)反应物更换为Au@Ag核壳纳米棒,发生侧面优先腐蚀,形成Ag/Au/Ag哑铃状结构;3)若是Au@AuAg核壳纳米棒为反应物,腐蚀过程则会产生许多表面为孔洞结构的AuA g纳米棒;4)利用氧气与抗坏血酸的协同作用,制备出一维空心多金属纳米结构;5)通过Ag~+的调控,制备变细的PtAu/Au/PtAu哑铃状结构。
Polymetallic nanostructures are attractive for many applications, due to their unique morphology, large specific surface area and distinctive electronic effects. Compared with the widespread growth controls, those based on etching reactions are less reported, particularly for the case of one-dimensional metal nanostructures. Here, gold-based nanorods are selected as a model to demonstrate the controls on etching modes for novel polymetallic nanostructures. 1) Synthesis of gold nanorods in different aspect ratios by selective shortening; 2) Synthesis of Ag/Au/Ag dumbbell-like nanorods by side etching of Au@Ag core-shell nanorods; 3) Synthesis of porous Au Ag nanorods by dealloying process of Au@AuA g core-shell nanorods; 4) Synthesis of one-dimensional hollow polymetallic nanostructures by the reduction of metal salts and the etching of gold nanorods; 5) Synthesis of monodisperse dumbbell-like PtA u-tipped thin nanorods by selective etching.
Polymetallic nanostructures are attractive for many applications, due to their unique morphology, large specific surface area and distinctive electronic effects. Compared with the widespread growth controls, those based on etching reactions are less reported, particularly for the case of one-dimensional metal nanostructures. Here, gold-based nanorods are selected as a model to demonstrate the controls on etching modes for novel polymetallic nanostructures. 1) Synthesis of gold nanorods in different aspect ratios by selective shortening; 2) Synthesis of Ag/Au/Ag dumbbell-like nanorods by side etching of Au@Ag core-shell nanorods; 3) Synthesis of porous Au Ag nanorods by dealloying process of Au@AuA g core-shell nanorods; 4) Synthesis of one-dimensional hollow polymetallic nanostructures by the reduction of metal salts and the etching of gold nanorods; 5) Synthesis of monodisperse dumbbell-like PtA u-tipped thin nanorods by selective etching.
引文
[1]Zhang,W.;Yang,J.;Lu,X.ACS Nano 2012,6,7397-7405.
[2]Sun,Y.;Xia,Y.J.Am.Chem.Soc.2004,126,3892-3901;Adv.Mater.,2004,16,264-268.
[2]Sun,Y.;Xia,Y.J.Am.Chem.Soc.2004,126,3892-3901;Adv.Mater.,2004,16,264-268.