CN100564244C - A kind of preparation method of palladium nanometer wire oldered array material - Google Patents
A kind of preparation method of palladium nanometer wire oldered array material Download PDFInfo
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- CN100564244C CN100564244C CNB2006100366390A CN200610036639A CN100564244C CN 100564244 C CN100564244 C CN 100564244C CN B2006100366390 A CNB2006100366390 A CN B2006100366390A CN 200610036639 A CN200610036639 A CN 200610036639A CN 100564244 C CN100564244 C CN 100564244C
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Abstract
The present invention relates to the palladium nanometer wire field, disclose a kind of preparation method of palladium nanometer wire oldered array material.The present invention is a polymerization face with the torpescence metal, is equipped with nano-alumina template with the secondary oxidation legal system earlier, is assemblied in surface of metal titanium, prepares palladium nanometer wire with dc electrodeposition again.Prepared palladium nanometer wire diameter is unified, arrange in order, and length can be controlled by the circulation cycle, is easy to reach the production needs.Preparation method of the present invention is simple, need not sputtering technology, and the whole flow process time is short, and synthesis condition just can carry out under normal conditions, and is therefore with low cost.
Description
Technical field
The present invention relates to the palladium nanometer wire field, specifically, relate to a kind of preparation method of palladium nanometer wire oldered array material.
Background technology
Metal nanometer line array is because of its non-linear optical property, Anisotropically conductive performance, dichroism and unique magnetic performance have extremely important application at aspects such as electronics and opto-electronic device, high density magnetic storages.Palladium nanometer wire and array thereof have superior physics and chemical property, and can be used as the formation unit of quantum structure device, because the ability of very outstanding storage of hydrogen, and good catalytic activity are having good prospects for application aspect sensor, fuel cell and the catalysis.Surperficial hydrogen atom at palladium is adsorbed, and then it is moved under the shallow surface of metal, because hydrogen can only enter the shallow surface of palladium metal, when palladium was in the nanometer state, the palladium nanometer wire array just had great hydrogen-absorbing ability.During as catalyst, the palladium nanometer wire array has high specific area, so high catalytic activity is arranged.Can also utilize of the induction of palladium nanometer wire array to hydrogen, as miniature hydrogen sensor and hydrogen activity switch, but this hydrogen sensor has a series of advantages such as quick response, high sensitivity ambient operation, low power consumption, anti-other gas interference and selectivity are good.Synthetic and the preparation of palladium nanometer wire is that restriction realizes this possible key, is worth so synthetic palladium nanometer wire array has important use.
The palladium nanometer wire for preparing among the existing various preparation methods is arranged in a jumble, quantity is few, and the method complexity can't be used for practical application.
Summary of the invention
The objective of the invention is deficiency, provide a kind of preparation method of palladium nanometer wire array material, to obtain the palladium nanometer wire array material of high-sequential at existing palladium nanometer wire array material existence.
To achieve these goals, the preparation method of palladium nanometer wire oldered array material of the present invention, adopt following steps:
(1) synthesis of nano alumina formwork:
A. with aluminium flake earlier with 70% perchloric acid and absolute ethyl alcohol mixed liquor 0～5 ℃ of temperature, voltage 15～22V polishing 5～10 minutes down; The volume ratio of 70% perchloric acid and absolute ethyl alcohol is 1: 4 in the mixed liquor;
B. aluminium flake cleans back oxidation 1～2 hour under polyacid and corresponding voltage thereof with redistilled water; Under 60 ℃, mix washing lotion then and clean aluminium flake half an hour, remove oxide-film with 6% phosphoric acid and 1.8% chromic acid; Mix in the washing lotion, the ratio of 6% phosphoric acid and 1.8% chromic acid does not need special qualification, and proper proportion gets final product;
C. after aluminium flake cleans with redistilled water, use the voltage identical to carry out anodic oxidation with above-mentioned steps b; Peel off aluminum matrix with the stannous chloride saturated aqueous solution then, use 5% phosphoric acid through hole again, obtain nano-alumina template, clean and be kept in the redistilled water;
(2) the torpescence sheet metal is polished to minute surface, handle with strong acid and highly basic, after fully washing with redistilled water then, nano-alumina template is assemblied on the torpescence sheet metal closely, immerse the 0.1mol/L palladium basic plating solution of pH=8, with 0.7V voltage, electro-deposition was taken out in 20 minutes, used 5%H
3PO
3Soak molten going after the template with drying after the second distillation water washing.
In above-mentioned preparation method, polyacid described in the step b and corresponding voltage thereof are 0.5～1.5mol/L sulfuric acid, 18～22V; Or 0.1～0.5mol/L oxalic acid, 30～50V; Or 0.3～1.0mol/L phosphoric acid, 100～130V.
In above-mentioned preparation method, oxidation described in the step b is to adopt corrosion resistant plate to do electrode.
In above-mentioned preparation method, the anodised time described in the step c is 6 hours; The time of described usefulness 5% phosphoric acid through hole is 30 minutes.
In above-mentioned preparation method, torpescence sheet metal described in the step (2) is titanium metal plate or titanizing sheet metal.
In above-mentioned preparation method, torpescence sheet metal described in the step (2) is to adopt abrasive paper for metallograph or aluminium oxide to be polished to minute surface.
In above-mentioned preparation method, strong acid is 20% nitric acid described in the step (2), and described highly basic is 10% NaOH.
Compared with the prior art, the present invention has following beneficial effect:
1, the present invention is with titanium metal plate (titanizing or other inactive metal, and can use repeatedly) be polymerization face, need not sputtering technology, save expensive technology, it is that mould material is assemblied in surface of metal titanium that the secondary oxidation legal system is equipped with nano aluminium oxide, and prepares palladium nanometer wire with dc electrodeposition, the palladium nanometer wire diameter that generates is unified, arrange in order, and length can be controlled by the circulation cycle, is easy to reach the production needs.
2, the inventive method is simple, work simplification, and the whole flow process time is short, and synthesis condition just can carry out under normal conditions, and is therefore with low cost.
Description of drawings
Fig. 1 is palladium nano-array surface observed figure under electronic scanner microscope;
Fig. 2 is palladium nano-array surface observed figure under electronic scanner microscope;
Fig. 3 is palladium nano-array side observed figure under electronic scanner microscope.
The specific embodiment
The preparation of embodiment 1 palladium nanometer wire oldered array material of the present invention
(1) synthesis of nano alumina formwork
A. aluminium flake (purity 99.999%) was polished 8 minutes down at 2 ℃ with 70% perchloric acid and absolute ethyl alcohol mixed liquor earlier, voltage is 20V; The volume ratio 1: 4 of 70% perchloric acid and absolute ethyl alcohol in the mixed liquor.
B. aluminium flake cleans back oxidation first 1.5 hours under 1mol/L sulfuric acid, voltage 20v with redistilled water, does electrode with corrosion resistant plate; Under 60 ℃, mix washing lotion then and clean aluminium flake half an hour, remove oxide-film with 6% phosphoric acid and 1.8% chromic acid; Mix in the washing lotion, the volume ratio of 6% phosphoric acid and 1.8% chromic acid is 1: 1.
C. after aluminium flake cleans with redistilled water, use the voltage identical to carry out anodic oxidation 6 hours with above-mentioned b step; Peel off aluminum matrix with the stannous chloride saturated aqueous solution then, used 5% phosphoric acid through hole again 30 minutes, obtain nano-alumina template, clean and be kept in the redistilled water.
(2) titanium metal plate is polished to minute surface through abrasive paper for metallograph and aluminium oxide, after fully washing with redistilled water then, is assemblied in nano-alumina template on the glass-carbon electrode closely, immerse the 0.1mol/L plating palladium solution of pH=8, with 0.7V voltage electro-deposition 20 minutes, take out, use 5%H
3PO
3Soak molten going after the template with drying after the second distillation water washing.As Fig. 1, Fig. 2 and shown in Figure 3, gained palladium nanometer wire diameter is unified, arranges in order.
Claims (6)
1, a kind of preparation method of palladium nanometer wire oldered array material is characterized in that may further comprise the steps:
(1) synthesis of nano alumina formwork:
A. with aluminium flake earlier with 70% perchloric acid and absolute ethyl alcohol mixed liquor 0～5 ℃ of temperature, voltage 15～22V polishing 5～10 minutes down; The volume ratio of 70% perchloric acid and absolute ethyl alcohol is 1: 4 in the mixed liquor;
B. aluminium flake cleans back oxidation 1～2 hour under polyacid and corresponding voltage thereof with redistilled water; Under 60 ℃, mix washing lotion then and clean aluminium flake with the chromic acid of 6% phosphoric acid and 1.8%; Described polyacid and corresponding voltage thereof are 0.5～1.5mol/L sulfuric acid, 18～22V; Or 0.1～0.5mol/L oxalic acid, 30～50V; Or 0.3～1.0mol/L phosphoric acid, 100～130V;
C. after aluminium flake cleans with redistilled water, use the voltage identical to carry out anodic oxidation with above-mentioned (b) step; Peel off aluminum matrix with the stannous chloride saturated aqueous solution then, use 5% phosphoric acid through hole again, obtain nano-alumina template, clean and be kept in the redistilled water;
(2) the torpescence sheet metal is polished to minute surface, handle with strong acid and highly basic, after fully washing with redistilled water then, nano-alumina template is assemblied on the torpescence sheet metal closely, immerse the 0.1mol/L palladium basic plating solution of pH=8, with 0.7V voltage, electro-deposition was taken out in 20 minutes, used 5%H
3PO
3Soak molten going after the template with drying after the second distillation water washing.
2, preparation method according to claim 1 is characterized in that oxidation described in the above-mentioned steps b is to adopt corrosion resistant plate to do electrode.
3, preparation method according to claim 1 is characterized in that the anodised time described in the above-mentioned steps c is 6 hours; The time of described usefulness 5% phosphoric acid through hole is 30 minutes.
4, preparation method according to claim 1 is characterized in that torpescence sheet metal described in the above-mentioned steps (2) is titanium metal plate or titanizing sheet metal.
5, preparation method according to claim 1 is characterized in that torpescence sheet metal described in the above-mentioned steps (2) is to adopt abrasive paper for metallograph or aluminium oxide to be polished to minute surface.
6, preparation method according to claim 1 is characterized in that strong acid is 20% nitric acid described in the above-mentioned steps (2), and described highly basic is 10% NaOH.
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| CN100564244C true CN100564244C (en) | 2009-12-02 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101901755B (en) * | 2010-07-23 | 2011-12-28 | 复旦大学 | Method for preparing high-density palladium nanocrystal suitable for flash memory |
| CN101935017B (en) * | 2010-07-29 | 2013-05-01 | 中国科学院生态环境研究中心 | Method for synthesizing noble metal superfine nanowire water phase and establishing noble metal nanopore membrane by self-precipitation thereof |
| CN103252501A (en) * | 2013-04-27 | 2013-08-21 | 宁波大学 | Method for preparing metal palladium nanowires of controllable size |
| CN103381364B (en) * | 2013-07-02 | 2015-10-14 | 湖南省吉安特技术有限公司 | A kind of preparation method of nano palladium oxide catalyst |
| CN104087976B (en) * | 2014-07-02 | 2016-07-06 | 河北工业大学 | The preparation method of Sm-Co alloyed amorphous magnetic nano-wire array |
| CN106159284B (en) * | 2015-04-17 | 2019-08-30 | 中国科学院上海高等研究院 | A kind of ordered nano-structure membrane electrode and preparation method thereof |
| CN106770598B (en) * | 2016-12-08 | 2019-06-04 | 东莞理工学院 | Pd nano wire modified electrode and its preparation method and application |
| CN106975754B (en) * | 2016-12-30 | 2019-08-30 | 杭州罗松贸易有限公司 | A kind of preparation method of palladium nanometer wire |
| CN106784880B (en) * | 2017-01-19 | 2019-06-28 | 山东大学 | The synthetic method of water-soluble one-dimensional rhotanium nano wire |
| CN107699931B (en) * | 2017-09-11 | 2019-08-30 | 华中科技大学 | A kind of preparation method and application of aluminium oxide nano pillar array structure |
| CN109440148A (en) * | 2018-10-29 | 2019-03-08 | 钟祥博谦信息科技有限公司 | A kind of preparation method and applications of palladium cobalt nanowire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045925A (en) * | 1997-08-05 | 2000-04-04 | Kansas State University Research Foundation | Encapsulated nanometer magnetic particles |
| CN1748860A (en) * | 2005-09-06 | 2006-03-22 | 南开大学 | Loaded palladium catalyst and preparing method and its use |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045925A (en) * | 1997-08-05 | 2000-04-04 | Kansas State University Research Foundation | Encapsulated nanometer magnetic particles |
| CN1748860A (en) * | 2005-09-06 | 2006-03-22 | 南开大学 | Loaded palladium catalyst and preparing method and its use |
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