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Ag-AgX nanowire and preparation method thereof

A nanowire, ag-agx technology, applied in the field of Ag-AgX nanowire and its preparation, can solve the problems of high cost and complex preparation process, and achieve the effects of uniform size, simple operation process and strong practicability

Active Publication Date: 2021-09-17
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of complex preparation process and high cost of one-dimensional Ag-AgX nanowires existing in the prior art, and proposes a Ag-AgX The preparation method of the nanowires is to prepare the Ag-AgX uniform size nanowires with convenient and adjustable anions by a one-step hydrothermal method. The method has simple operation process, low cost, good repeatability and strong practicability; The method synthesized one-dimensional Ag-AgX nanowires or nanorods with uniform size. This composite heterogeneous material has potential application value in the fields of catalysis, photocatalysis, biosensing and detection, and electronic devices.

Method used

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  • Ag-AgX nanowire and preparation method thereof
  • Ag-AgX nanowire and preparation method thereof
  • Ag-AgX nanowire and preparation method thereof

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preparation example Construction

[0033] The invention provides a method for preparing Ag / AgX nanowires with uniform size. Water is used as a solvent, and a soluble silver source is used as a silver source. Ag / AgX (X=Cl, Br, I) nanowires or nanorods with uniform size. The preparation method comprises the following steps:

[0034] (1) The soluble silver source (silver nitrate or silver acetate) with a molar ratio of 1:2~10:0.05~0.6 (preferably 1:3~5:0.12~0.28) and surfactant A and surfactant B ( or halide salt) in water, stirred evenly, and the total molar concentration of the three raw materials and the mixed solution after uniform mixing was controlled within the range of 0.03-0.12mol / L, and then heated at a reaction temperature of 180-220°C, Reacting for 5-20 hours; (2) The feed liquid obtained by the reaction is centrifuged and washed to obtain Ag / AgX nanowires or nanorods with uniform size.

[0035]Wherein, surfactant A is selected from any one of polyvinylpyrrolidone, N-methylpyrrolidone, vinylpyrrolido...

Embodiment 1

[0037] Weigh 0.034g AgNO 3 , 0.1g PVP and 0.02g CTAB were dissolved in 20mL water, and the solution was stirred evenly; the obtained solution was transferred to a 50mL reactor, heated in an oven at 200°C, and reacted for 10h to obtain the reaction product;

[0038] The prepared reaction product is carried out centrifugal washing, obtains Ag-AgBr sample (such as figure 1 as shown, figure 1 a is the SED image of the sample at low magnification, figure 1 b is a high magnification SEM image of the sample), which is a uniform size one-dimensional nanowire with a diameter of about 30nm and a length greater than 40μm, and its structural components are as follows figure 2 shown.

Embodiment 2

[0040] Weigh 0.034gAgNO 3 , 0.1g PVP and 0.02g CTAB were dissolved in 20mL water, and the solution was stirred evenly; the obtained solution was transferred to a 50mL reactor, heated in an oven at 200°C, and reacted for 5h to obtain the reaction product;

[0041] The prepared reaction product is carried out centrifugal washing, obtains Ag-AgBr sample (such as image 3 As shown), it is a one-dimensional nanowire with a diameter of about 30 nm and a length of tens of microns.

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Abstract

The invention belongs to the technical field of preparation of precious metal and semiconductor heterogeneous materials, and particularly relates to an Ag-AgX nanowire and a preparation method thereof. The preparation method comprises the following steps: (1) mixing a soluble silver source, a surfactant A and a surfactant B (or halide salt) in a certain molar ratio, dissolving the mixture in water, carrying out uniform stirring, and then carrying out heating and reacting for a certain time; and (2) centrifugally washing the reaction liquid obtained by the reaction to obtain a product. The Ag-AgX uniform-size nanowire with simple and adjustable anions is prepared by a one-step hydrothermal method, and the method is simple and convenient in operation process, low in cost, good in repeatability and high in practicability; the invention further provides a uniform-size one-dimensional Ag-AgX nanowire or nanorod synthesized by the preparation method, and the composite heterogeneous material has potential application value in the fields of catalysis, photocatalysis, biosensing detection and electronic devices.

Description

technical field [0001] The invention belongs to the technical field of preparation of noble metal and semiconductor heterogeneous materials, and in particular relates to an Ag-AgX nanowire and a preparation method thereof. Background technique [0002] Silver-silver halide composites are noble metal and semiconductor heterogeneous materials, which not only have excellent physical and chemical properties of Ag, such as electrical conductivity, surface plasmon resonance effect, surface enhanced Raman effect, etc., but also have special functions of semiconductor materials. Compared with semiconductor materials, Ag particles have a higher work function and are easy to store electrons. Therefore, the combination of heavy metals and semiconductor materials is conducive to the efficient separation and transfer of photogenerated carriers, improving the photocatalytic activity of materials, and is beneficial to the treatment of pollutants in water. , Sterilization, environmental pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00C01G5/02B82Y40/00B82Y30/00B01J27/10B01J27/08
CPCB22F9/24C01G5/02B82Y40/00B82Y30/00B01J27/10B01J27/08C01P2004/16C01P2004/03C01P2002/72B01J35/39
Inventor 贾长超高爱林王淑怡朱少奇白静雯
Owner QINGDAO UNIV OF SCI & TECH
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