CN104275493B - A kind of method preparing gold nano dish for reducing agent with aminoacid - Google Patents
A kind of method preparing gold nano dish for reducing agent with aminoacid Download PDFInfo
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- CN104275493B CN104275493B CN201310274181.2A CN201310274181A CN104275493B CN 104275493 B CN104275493 B CN 104275493B CN 201310274181 A CN201310274181 A CN 201310274181A CN 104275493 B CN104275493 B CN 104275493B
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- aminoacid
- reducing agent
- gold nano
- anion surfactant
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Abstract
The invention discloses a kind of method preparing gold nano dish for reducing agent with aminoacid, its method is: with anion surfactant-aminoacid-gold chloride mixed system for reaction system, is obtained by reacting two dimensional surface gold nano dish under room temperature.It is simple that the method for the present invention has reaction system, mild condition；Reducing agent is biomolecule, has environmental friendliness characteristic；Product morphology and size tunable, the feature such as yield is big and structure is distinct.
Description
Technical field
The preparation method that the present invention relates to a kind of two-dimensional gold nanometer plate, particularly relates to a kind of method preparing gold nano dish for reducing agent with aminoacid.
Background technology
There is the noble metal nano particles of anisotropy geometry, especially one-dimensional or two-dimensional gold nanoparticle, showing the optical absorption different from spheroidal particle and body phase material and emission spectrum character, the field such as metal-enhanced fluorescence, surface enhanced raman spectroscopy, medium sensing, cancer thermotherapy, drugrelease, nanocomposite optical imaging, local Electromagnetic enhancement has great using value.
Develop many effective methods currently for people such as two-dimensional gold nanometer plate or sheets, mainly include template, hydrothermal synthesis method and seed mediated growth method etc..Soft template method is mainly in the solution system containing gold chloride, the surfactant and the auxiliary agent that add functionalization make template to form bar-shaped or elliptoid micelle, the golden nanometer particle making reduction is limited in micelle oriented growth, finally being grown to anisotropic golden nanometer particle, conventional has electrochemical process and photochemical method.
But the reducing agent used by above method mostly is ascorbic acid etc., utilizes alanine for reducing agent, prepare the research of two dimensional surface gold nano dish, have not yet to see open source literature report.
Summary of the invention
The problem to be solved in the present invention is to provide under a kind of temperate condition to utilize aminoacid and reduces HAuCl for reducing agent4Prepare the short-cut method of two dimensional surface gold nano dish.
The method preparing gold nano dish for reducing agent with aminoacid of the present invention, is made up of following step:
(1) configuration reaction system: be 0.03mol × L with concentration by anion surfactant that mass percent is 25-50wt% and aminoacid that mass percent is 0.5-2.0wt%-1Aqueous solution of chloraurate mixes, and obtains uniform reaction system；
(2) above-mentioned system at room temperature being stood, the time is 24-80h；
(3) dilute with water washs above-mentioned sample, and is centrifuged (3000rpm).Collecting centrifuged pellet product with the copper mesh being covered with Formvor film, then with transmission electron microscope observing, products therefrom presents two-dimension plane structure, and the length of side is 1-3 micron, and thickness is 2-10nm.
Wherein, the mass percent of the anion surfactant described in step (1) is preferably 25 45wt%.
Wherein, the mass percent of the anion surfactant described in step (1) most preferably is 45wt%.
Wherein, the amino acid whose mass percent described in step (1) is preferably 0.5-2.0wt%.
Wherein, the amino acid whose mass percent described in step (1) most preferably is 1.5wt%.
Wherein, the anion surfactant described in step (1) is sodium lauryl sulphate (SDS).
Wherein, the aminoacid described in step (1) is DL-Alanine.
Wherein, the concentration of the chlorauric acid solution described in step (1) is 0.03mol × L-1。
Wherein, the time of repose described in step (2) is preferably 24～80h.
Wherein, the time of repose described in step (2) most preferably is 72h.
Wherein, described step (1), most preferably mass percent is aminoacid and the 0.03mol × L of SDS, 1.5wt% of 45wt% in (2)-1Aqueous solution of chloraurate mixes, and time of repose is 72h.
The method adopting the present invention prepares two dimensional surface gold nano dish, and the metal nano material length of side obtained is 1-3 micron, and thickness is 2-10nm, can apply to the field such as electronic device and catalysis.
The present inventor, through lot of experiments, show that DL-Alanine can reduce HAuCl as reducing agent4Prepare gold nano-material, and the two dimensional surface gold nano structure with anisotropy pattern can be obtained, respond well.
Beneficial effects of the present invention:
1, the aminoacid used in the present invention is DL-Alanine.As reducing agent, alanine is in gold nano
The application of field of material preparation has no report；Alanine is a kind of common biomolecule, is highly soluble in common solution during water etc. produces；Environment and biology are not had toxic action, compensate for existing chemical method and produce the deficiency of gold nano-material.
2, reaction at room temperature carries out, and simple, mild condition is controlled, it is not necessary to other energy expenditure, and this is more beneficial for saving cost.
Accompanying drawing explanation
The gold nano product transmission electron microscope photo of differential responses system in Fig. 1, Fig. 2 and Fig. 3 respectively embodiment 1, embodiment 2 and embodiment 3.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of method preparing gold nano dish for reducing agent with aminoacid, step is as follows:
(1) preparation sodium lauryl sulphate (SDS, 25wt%)-alanine (0.8wt%)-gold chloride (HAuCl4, 0.03M aqueous solution) and system, put into 25 ° of C calorstats after mixing, react 72h；
(2) dilute with water reaction system, centrifugal, remove supernatant, collect precipitation and products therefrom, be two-dimensional gold nanometer plate by transmission electron microscope observing gained primary product, separately have a small amount of spheroidal particle, wherein gold nano dish is equilateral triangle or hexagonal shape, and the length of side is 1-3 micron, and thickness is 2-10nm.
Embodiment 2
A kind of method preparing gold nano dish for reducing agent with aminoacid, step is as follows:
(1) preparation sodium lauryl sulphate (SDS, 35.5wt%)-alanine (1.2wt%)-gold chloride (HAuCl4, 0.03M aqueous solution) and system, put into 25 ° of C calorstats after mixing, react 72h；
(2) dilute with water reaction system, centrifugal, remove supernatant, collecting precipitation and products therefrom, be two-dimensional gold nanometer plate by transmission electron microscope observing gained primary product, wherein gold nano dish is equilateral triangle or hexagonal shape, the length of side is 1.5-3 micron, and thickness is 2-10nm.
Embodiment 3
A kind of method preparing gold nano dish for reducing agent with aminoacid, step is as follows:
(1) preparation sodium lauryl sulphate (SDS, 45wt%)-alanine (1.5wt%)-gold chloride (HAuCl4, 0.03M aqueous solution) and system, put into 25 ° of C calorstats after mixing, react 72h；
(2) dilute with water reaction system, centrifugal, remove supernatant, collecting precipitation and products therefrom, be two-dimensional gold nanometer plate by transmission electron microscope observing gained primary product, wherein gold nano dish is equilateral triangle or hexagonal shape, the length of side is 1-2 micron, and thickness is 2-5nm.
Embodiment 4
A kind of method preparing gold nano dish for reducing agent with aminoacid, step is as follows:
(1) preparation sodium lauryl sulphate (SDS, 45wt%)-alanine (2.0wt%)-gold chloride (HAuCl4, 0.03M aqueous solution) and system, put into 25 ° of C calorstats after mixing, react 48h；
(2) dilute with water reaction system, centrifugal, remove supernatant, collect precipitation and products therefrom, be two-dimensional gold nanometer plate by transmission electron microscope observing gained primary product, separately have a small amount of spheroidal particle, wherein gold nano web length is 1.5-2 micron.
Embodiment 5
A kind of method preparing gold nano dish for reducing agent with aminoacid, step is as follows:
(1) preparation sodium lauryl sulphate (SDS, 40wt%)-alanine (1.5wt%)-gold chloride (HAuCl4, 0.03M aqueous solution) and system, put into 25 ° of C calorstats after mixing, react 48h；
(2) dilute with water reaction system, centrifugal, remove supernatant, collect precipitation and products therefrom, be two-dimensional gold nanometer plate by transmission electron microscope observing gained primary product, wherein gold nano web length is 1-2 micron.
Claims (1)
1. the method preparing gold nano dish with aminoacid for reducing agent, is characterized in that: utilizing anion surfactant-aminoacid-gold chloride mixed system is reaction system, reacts under room temperature；Concretely comprise the following steps: (1) preparation anion surfactant-aminoacid-gold chloride liquid crystal system, be 0.03mol × L by anion surfactant that mass percent is 25-50% and aminoacid that mass percent is 0.5-2.0% with concentration-1Aqueous solution of chloraurate mixes, and obtains uniform liquid crystal system；(2) above-mentioned reaction system at room temperature being stood, the time is 24-48h；(3) dilute with water reaction system, centrifugal, to remove supernatant, collect precipitation and products therefrom, present two-dimension plane structure by transmission electron microscope observing products therefrom, the length of side is 1-3 micron, and thickness is 5-10 nanometer；Described anion surfactant is sodium lauryl sulphate；Described aminoacid is DL-Alanine.
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| CN105802605A (en) * | 2016-05-12 | 2016-07-27 | 北京科技大学 | Preparation method of fluorogold nanocomposite used for cell imaging |
| CN108007986B (en) * | 2017-11-28 | 2020-06-02 | 安徽师范大学 | Mercury-modified gold nanodisk electrode, preparation method and application thereof in detection of mesotrione in pesticide |
| CN113996799B (en) * | 2021-10-08 | 2024-02-02 | 郑州工程技术学院 | Preparation method of copper nanomaterial |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924117A (en) * | 2006-08-24 | 2007-03-07 | 山东大学 | Preparation method of two-dimensional plane gold nano single crystal plate |
| CN102847951A (en) * | 2012-07-24 | 2013-01-02 | 浙江理工大学 | Process for preparing gold nano particles through reduction of chloroauric acid by catalase |
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| US8088740B2 (en) * | 2009-05-04 | 2012-01-03 | Gwangju Institute Of Science And Technology | Gold binding peptides and shape-and size-tunable synthesis of gold nanostructures |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924117A (en) * | 2006-08-24 | 2007-03-07 | 山东大学 | Preparation method of two-dimensional plane gold nano single crystal plate |
| CN102847951A (en) * | 2012-07-24 | 2013-01-02 | 浙江理工大学 | Process for preparing gold nano particles through reduction of chloroauric acid by catalase |
Non-Patent Citations (5)
| Title |
|---|
| Jianping Xie et al..Synthesis of Single-Crystalline Glod Nanoplates in Aqueous Solutions through Biomineralization by Serum Albumin Protein.《J.Phys.Chem.》.2007,第111卷(第28期),10226-10232. * |
| Luyan Wang et al..Synthesis of Gold Nano-and Microplates in hexagonal Liquid Crystal.《J.Phys.Chem.》.2005,第109卷(第8期),3189-3194. * |
| Soonchang Hong et al..Shape Transformation of Gold Nanoplates and there Surface Plasmon Characterization：Trianguar to Hexagonal Nanoplates.《Chem. Mater.》.2011,2011-2013. * |
| Yen Nee Tan et al..Aspartic Acid Synthesis of Crytalline Gold Nanoplates, Nanoribbons, and Nanowires in Aqueous Solutions.《J.phys.Chem.》.2008,第112卷(第14期),5463－5470. * |
| Yong Shao et al..Synthesis of gold nanoplates by aspartate reduction of gold chloride.《Chem.Commun.》.2004,1104-1105. * |
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