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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- amino acid
- reducing agent
- gold
- reaction system
- anionic surfactant
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000010931 gold Substances 0.000 title claims abstract description 34
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 24
- 150000001413 amino acids Chemical class 0.000 title claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 17
- 235000001014 amino acid Nutrition 0.000 title abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 229940024606 amino acid Drugs 0.000 claims description 18
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 12
- 239000002055 nanoplate Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- QNAYBMKLOCPYGJ-UHFFFAOYSA-N Alanine Chemical compound CC([NH3+])C([O-])=O QNAYBMKLOCPYGJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000003945 anionic surfactant Substances 0.000 claims description 6
- 238000007865 diluting Methods 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 229950010030 dl-alanine Drugs 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 2
- 150000001450 anions Chemical class 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000002107 nanodisc Substances 0.000 description 10
- 229960003767 alanine Drugs 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002105 nanoparticle Substances 0.000 description 4
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 3
- 235000004279 alanine Nutrition 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000012798 spherical particle Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910004042 HAuCl4 Inorganic materials 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002082 metal nanoparticle Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000035040 seed growth Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004416 surface enhanced Raman spectroscopy Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000000015 thermotherapy Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
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 invention relates to a preparation method of a two-dimensional gold nano disc, in particular to a method for preparing a gold nano disc by taking amino acid as a reducing agent.
Background
The noble metal nanoparticles with anisotropic geometric shapes, particularly the one-dimensional or two-dimensional gold nanoparticles, show optical absorption and emission spectrum properties different from those of spherical particles and bulk phase materials, and have great application values in the fields of metal enhanced fluorescence, surface enhanced Raman scattering, medium sensing, cancer thermotherapy, drug release control, nano-optical imaging, local electromagnetic field enhancement and the like.
At present, a plurality of effective methods are developed for two-dimensional gold nanoplates or sheets and the like, and mainly comprise a template method, a hydrothermal synthesis method, a seed growth method and the like. The soft template method is mainly characterized in that a functional surfactant and an auxiliary agent are added into a solution system containing chloroauric acid to form a rod-shaped or elliptical micelle as a template, so that reduced gold nanoparticles are limited in the micelle to directionally grow, and finally grow into anisotropic gold nanoparticles, and an electrochemical method and a photochemical method are commonly used.
However, most of reducing agents used in the methods are ascorbic acid and the like, and the research on preparing the two-dimensional planar gold nanoplate by using alanine as the reducing agent is not reported in a published document at present.
Disclosure of Invention
The invention aims to provide a method for reducing HAuCl by using amino acid as a reducing agent under mild conditions4A simple method for preparing a two-dimensional plane gold nano disc.
The method for preparing the gold nanoplate by taking the amino acid as the reducing agent comprises the following steps:
(1) preparing a reaction system, namely preparing 25 to 50 weight percent of anionic surfactant, 0.5 to 2.0 weight percent of amino acid and 0.03mol of × L-1Mixing chloroauric acid water solutions to obtain a uniform reaction system;
(2) standing the system at room temperature for 24-80 h;
(3) the samples were washed by dilution with water and centrifuged (3000 rpm). Collecting the precipitated product after centrifugation by using a copper net covered with a Formvor film, and observing the precipitated product by using a transmission electron microscope, wherein the obtained product has a two-dimensional plane structure, the side length is 1-3 micrometers, and the thickness is 2-10 nm.
Wherein, the mass percent of the anionic surfactant in the step (1) is preferably 25-45 wt%.
Wherein, the mass percentage of the anionic surfactant in the step (1) is most preferably 45 wt%.
Wherein, the mass percentage of the amino acid in the step (1) is preferably 0.5-2.0 wt%.
Wherein, the mass percentage of the amino acid in the step (1) is 1.5wt% most preferably.
Wherein, the anionic surfactant in the step (1) is Sodium Dodecyl Sulfate (SDS).
Wherein the amino acid in the step (1) is DL-alanine.
Wherein,the concentration of the chloroauric acid solution in the step (1) is 0.03mol × L-1。
Wherein the standing time in the step (2) is preferably 24-80 h.
Wherein, the standing time in the step (2) is most preferably 72 h.
Wherein, the most preferable mass percentages in the steps (1) and (2) are 45wt% of SDS, 1.5wt% of amino acid and 0.03mol of × L-1Mixing with chloroauric acid water solution, and standing for 72 h.
The two-dimensional plane gold nanoplate prepared by the method has the side length of 1-3 microns and the thickness of 2-10nm, and can be applied to the fields of electronic devices, catalysis and the like.
The inventor of the invention has made extensive experimental studies to show that DL-alanine can be used as a reducing agent to reduce HAuCl4The preparation method is used for preparing the gold nano material, and a two-dimensional plane gold nano structure with anisotropic morphology can be obtained, so that the effect is good.
The invention has the beneficial effects that:
1. the amino acid used in the present invention is DL-alanine. Alanine as a reducing agent in gold nanoparticles
The application in the field of material preparation is not reported; alanine is a common biological molecule, and is very easy to dissolve in common solution in production such as water and the like; has no toxic action on environment and organisms, and makes up the defects of the existing chemical method for producing the gold nano-material.
2. The reaction is carried out at room temperature, is simple and feasible, has mild and controllable conditions, does not need other energy consumption, and is more favorable for saving the cost.
Drawings
FIG. 1, FIG. 2 and FIG. 3 are transmission electron micrographs of gold nanoproducts of different reaction systems in example 1, example 2 and example 3, respectively.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
A method for preparing gold nanoplates by taking amino acid as a reducing agent comprises the following steps:
(1) sodium dodecyl sulfate (SDS, 25 wt%) -alanine (0.8 wt%) -chloroauric acid (HAuCl) was prepared40.03M aqueous solution), uniformly mixing, putting into a constant temperature box at 25 ℃, and reacting for 72 hours;
(2) diluting the reaction system with water, centrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain two-dimensional gold nanodisk as main product and small amount of spherical particles, wherein the gold nanodisk is regular triangle or hexagon, and has side length of 1-3 μm and thickness of 2-10 nm.
Example 2
A method for preparing gold nanoplates by taking amino acid as a reducing agent comprises the following steps:
(1) sodium dodecyl sulfate (SDS, 35.5 wt%) -alanine (1.2 wt%) -chloroauric acid (HAuCl) was prepared40.03M aqueous solution), uniformly mixing, putting into a constant temperature box at 25 ℃, and reacting for 72 hours;
(2) diluting the reaction system with water, centrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain two-dimensional gold nanodiscs as main product, wherein the gold nanodiscs are regular triangle or hexagon, and have side length of 1.5-3 μm and thickness of 2-10 nm.
Example 3
A method for preparing gold nanoplates by taking amino acid as a reducing agent comprises the following steps:
(1) sodium dodecyl sulfate (SDS, 45 wt%) -alanine (1.5 wt%) -chloroauric acid (HAuCl) was prepared40.03M aqueous solution), uniformly mixing, putting into a constant temperature box at 25 ℃, and reacting for 72 hours;
(2) diluting the reaction system with water, centrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain two-dimensional gold nanodiscs as main product, wherein the gold nanodiscs are regular triangle or hexagon, and have side length of 1-2 μm and thickness of 2-5 nm.
Example 4
A method for preparing gold nanoplates by taking amino acid as a reducing agent comprises the following steps:
(1) sodium dodecyl sulfate (SDS, 45 wt%) -alanine (2.0 wt%) -chloroauric acid (HAuCl) was prepared40.03M aqueous solution), uniformly mixing, putting into a constant temperature box at 25 ℃, and reacting for 48 hours;
(2) diluting the reaction system with water, centrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain two-dimensional gold nanodiscs as main product and small amount of spherical particles, wherein the side length of the gold nanodiscs is 1.5-2 μm.
Example 5
A method for preparing gold nanoplates by taking amino acid as a reducing agent comprises the following steps:
(1) sodium dodecyl sulfate (SDS, 40 wt%) -alanine (1.5 wt%) -chloroauric acid (HAuCl) was prepared40.03M aqueous solution), uniformly mixing, putting into a constant temperature box at 25 ℃, and reacting for 48 hours;
(2) diluting the reaction system with water, centrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain two-dimensional gold nanodiscs with side length of 1-2 μm.
Claims (1)
1. A method for preparing gold nanoplates by using amino acid as a reducing agent is characterized in that an anionic surfactant-amino acid-chloroauric acid mixed system is utilized as a reaction system to react at room temperature, and the method comprises the specific steps of (1) preparing an anionic surfactant-amino acid-chloroauric acid liquid crystal system, wherein the anionic surfactant with the mass percentage of 25-50%, the amino acid with the mass percentage of 0.5-2.0% and × L with the concentration of 0.03mol-1Mixing chloroauric acid water solution to obtain a uniform liquid crystal system; (2) standing the reaction system at room temperature for 24-48 h; (3) diluting the reaction system with waterCentrifuging, removing supernatant, collecting precipitate to obtain product, and observing by transmission electron microscope to obtain product with two-dimensional plane structure, side length of 1-3 μm and thickness of 5-10 nm; the anionic surfactant is sodium dodecyl sulfate; the amino acid is DL-alanine.
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| KR102457687B1 (en) | 2017-11-10 | 2022-10-20 | 주식회사 엘지에너지솔루션 | Method for preparation of plate-type manganese dioxide nanoparticles |
| 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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Patent 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 |
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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