A kind of preparation method of bimetallic nanowire

Abstract

A method for preparing bimetallic nanowires, involving nanomaterials, providing a method that utilizes the synergistic effect of microbial cells and surfactants, has high reaction efficiency, is easy to cultivate microbial cells, and is easy to store dry bacterial powder. The preparation process is green and environmentally friendly. Preparation methods of bimetallic nanowires. Add bacteria powder to the bimetallic precursor solution first, then add surfactant, so that the molar concentration of surfactant in the solution is 2.5-10.0mM, and finally add AA, so that the molar concentration of AA in the solution is 0.25-2.0mM, and then Heating in a water bath, shaking, and reacting. The bottom of the reaction solution obtains a composite precipitate of tightly packed bimetallic nanowires and microorganisms. The surfactant is CTAB or CTAC; directly pour out the supernatant, or centrifuge to obtain and the composite material of the bimetallic nanowires, ultrasonically disrupt the bacteria in an ethanol solution, and obtain the bimetallic nanowires after cleaning.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a method for preparing double metal nanowires. Background technique [0002] The preparation and application of bimetallic nanomaterials and the exploration of their interface / surface effects have become one of the frontier topics in contemporary science and technology. For one-dimensional bimetallic nanowires, the current preparation method is a two-step single-metal nanowire pre-preparation-replacement method, such as Teng et al. (J Am Chem Soc 2008,130,1093.; J Phys Chem C 2008,112,14696 .) Using pre-prepared palladium nanowires to reduce gold precursors and platinum precursors respectively, Au-Pd and Au-Pt alloy nanowires were prepared under control; Sun et al. (J Am Chem Soc 2004, 126, 5940.) at 160°C Silver nanowires were first prepared under the conditions, and then palladium-silver alloy nanoparticles were covered on the surface of silver nanowires to form sheath nanomaterials; rec...

AI Technical Summary

Problems solved by technology

Although bimetallic nanowires have been synthesized by the chemical replacement method, the reaction conditions in the pre-preparation of single metal nanowires (Ag, Pd, etc.) are relatively harsh, requiring high temperature conditions or auxiliary relatively expensive and toxic organic reagents, and the replacement process Easily lead to the loss of precious metals

Although the co-reduction method still cannot prepare bimetallic nanowires in the presence of surfactants; the seed crystal method proposed by Murphy CJ et al. (J Phys Chem B 2001, 105, 4065; ChemCommun 2001, 617.) The classic method of silver nanowires, however, the preparation of bimetallic nanowires by the seed method has not yet been realized

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