文章信息/Info

Title:

Research Progress on Preparation of Nanoporous Metals with Tunable Pore Structure by Dealloying

作者:

方秀梅; 連利仙; 高希; 吳開霞

（四川大學(xué)錦城學(xué)院，四川 成都 611731）

Author(s):

FANG Xiumei;  LIAN Lixian;  GAO Xi;  WU Kaixia

(Jincheng College of Sichuan University, Chengdu 611731, China)

關(guān)鍵詞:

去合金化; 尺寸效應(yīng); 納米多孔; 孔徑可控; 后處理

Keywords:

dealloying;  size effect;  nanoporous;  tunable pore structure;  post-dealloying treatment

DOI:

10.7502/j.issn.1674-3962.2018.11.12

文獻(xiàn)標(biāo)志碼:

A

摘要:

納米多孔金屬具有三維連通、雙連續(xù)的納米級(jí)孔結(jié)構(gòu)，使其具有超高比表面積、高強(qiáng)度、低密度等獨(dú)特理化性能，在力學(xué)、催化、傳感、拉曼散射等領(lǐng)域具有廣闊的應(yīng)用前景，而且納米多孔金屬的性能表現(xiàn)出一定的尺寸效應(yīng)，因此研究孔結(jié)構(gòu)調(diào)控對(duì)納米多孔金屬的實(shí)際應(yīng)用具有重要意義。目前，去合金化制備孔徑可控的納米多孔金屬主要集中在調(diào)節(jié)去合金化工藝（腐蝕方式、腐蝕溫度、腐蝕電解質(zhì)、腐蝕添加劑等）和去合金化后處理過程（熱處理粗化、溶液浸泡）兩方面，探索納米多孔金屬在不同工藝條件下孔結(jié)構(gòu)的成孔機(jī)制、孔結(jié)構(gòu)演變規(guī)律為制備孔結(jié)構(gòu)呈特征規(guī)律分布（如梯度分布、分級(jí)分布、均勻分布）的納米多孔金屬塊材或薄膜奠定了夯實(shí)的基礎(chǔ)。

Abstract:

Nanoporous metals(NPMs) prepared through dealloying with three-dimensional continuous nanopores, have shown high potential on catalysis, sensing and surface-enhanced Raman scattering(SERS), in which field NPMs exhibit special size effect. To tune their properties and meet the requirements for various applications, microstructural regulation is a crucial issue for the development of nanoporous metals. At present, the microstructural regulation of nanoporous metals can be achieved by controlling over the dealloying parameters (such as corrosion method, corrosion temperature, corrosion electrolyte, and corrosion additive, etc) and post-dealloying treatment (annealing-induced coarsening, solution soaking). Exploring the formation mechanism and evolution law of nanoporous structure under different process conditions lays a solid foundation for preparation of bulk NPMs or thin films, which present the regularity of distribution in structure, such as gradient distribution, hierarchical distribution and uniform distribution.