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Preparation method for delafossite-structure AgCrO2 nanocrystalline material

A nanocrystalline material, delafossite technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the nanoeffect of photoelectrochemical properties has not been fully reflected and has not reached the nanometer scale , large crystal size and other problems, to achieve the effect of easy control of process parameters, low price and low production cost

Active Publication Date: 2014-06-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Given the currently reported Ag-based ABO 2 The crystal size of the material is relatively large, far from reaching the nanoscale, so that the nano-effects of the photoelectrochemical properties related to the crystal structure, morphology, and size of the material have not been fully reflected

Method used

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  • Preparation method for delafossite-structure AgCrO2 nanocrystalline material
  • Preparation method for delafossite-structure AgCrO2 nanocrystalline material
  • Preparation method for delafossite-structure AgCrO2 nanocrystalline material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh AgNO at room temperature according to the Ag:Cr molar ratio of 0.9 to 1.1:1 3 and Cr(NO 3 ) 3Finally, add deionized water and stir it with a magnetic stirrer for about 10-15 minutes. After it is completely dissolved, add 4 times the molar amount of NaOH that acts as a mineralizer, and continue stirring for about 10-15 minutes until it is completely dissolved and forms water. Thermally reactive precursor. Transfer the above reaction precursor to a hydrothermal reactor (usually polytetrafluoroethylene), and control the filling rate of the reaction solution to about 65%. After sealing the kettle body, place it in a programmed temperature-controlled oven for hydrothermal reaction, set the reaction temperature to 230°C, and the reaction time to 36-60 hours.

[0028] After the reaction, the kettle body was naturally cooled to room temperature, and the kettle body was opened to take out the reaction product. Use deionized water followed by dilute HNO 3 , dilute NH ...

Embodiment 2

[0030] Weigh the AgNO at room temperature according to the Ag:Cr molar ratio of 1:1 3 and Cr(NO 3 ) 3 Finally, add deionized water and stir it with a magnetic stirrer for about 10-15 minutes. After it is completely dissolved, add 4 times the molar amount of NaOH that acts as a mineralizer, and continue stirring for about 10-15 minutes until it is completely dissolved and forms water. Thermally reactive precursor.

[0031] Transfer the above reaction precursor to a hydrothermal reaction kettle (usually polytetrafluoroethylene), and control the filling rate of the reaction solution to about 65-75%. After sealing the kettle body, place it in a programmed temperature-controlled oven for hydrothermal reaction, set the reaction temperature to 210°C, and the reaction time to 36-60 hours.

[0032] After the reaction, the kettle body was naturally cooled to room temperature, and the kettle body was opened to take out the reaction product. Use deionized water followed by dilute HNO ...

Embodiment 3

[0034] Weigh the AgNO at room temperature according to the Ag:Cr molar ratio of 1:1 3 and Cr(NO 3 ) 3 Finally, add deionized water and stir it with a magnetic stirrer for about 10-15 minutes. After it is completely dissolved, add 3 times the molar amount of NaOH that acts as a mineralizer, and continue stirring for about 10-15 minutes until it is completely dissolved and forms water. Thermally reactive precursor.

[0035] Transfer the above reaction precursor to a hydrothermal reactor (usually polytetrafluoroethylene), and control the filling rate of the reaction solution to about 70%. After sealing the kettle body, place it in a programmed temperature-controlled oven for hydrothermal reaction, set the reaction temperature to 190°C, and the reaction time to 36-60 hours.

[0036] After the reaction, the kettle body was naturally cooled to room temperature, and the kettle body was opened to take out the reaction product. Use deionized water followed by dilute HNO 3 , dilute...

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Abstract

The invention discloses a preparation method for a delafossite-structure AgCrO2 nanocrystalline material, in particular to a low-temperature hydro-thermal synthesis method for rapidly preparing a delafossite-structure AgCrO2 nanocrystalline material. The preparation method comprises the following steps: regulating a reaction precursor constituent, a reaction temperature and the filling rate parameter of reaction solution in a hydro-thermal reaction kettle, reacting at 190-230 DEG C for 36-60 hours, carrying out centrifugal cleaning treatment on the reaction product for multiple times, and drying at 60 DEG C in a vacuum drying oven for 24-48 hours, thereby finally obtaining the AgCrO2 nanocrystalline material with the size of 10-20 nm. The method is simple to operate, easy in control over process parameters, pollution-free, high in yield, and capable of being widely used in photoelectric function devices such as transparent conductive oxides.

Description

technical field [0001] The invention relates to the field of synthesis and preparation of nanomaterials, in particular to the synthesis and preparation of AgCrO at a relatively low temperature using a hydrothermal method 2 nanocrystalline material. Background technique [0002] In 1997, Professor Hosono of Tokyo Institute of Technology and others first reported in Nature that they designed and prepared copper-iron ore (ABO) based on the chemical valence band modification theory. 2 ) structure of intrinsic p-type CuAlO 2 film. CuAlO 2 Inspired by Design Thinking in Chemistry, Series ABO 2 Structural semiconductor materials (A=Cu or Ag; B=Al, Ga, In, Sc, Y, Cr, Co or La, etc.) have become the key research focus of p-type TCO. However, currently regarding ABO 2 Material research reports mostly focus on p-type dense films, while nanoscale ABO 2 Very few reports of crystalline materials have been reported, limiting the ABO 2 The material is used as a mesoporous photocatho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/14H01G9/042H01G9/20B82Y30/00B82Y40/00
CPCY02E10/542
Inventor 熊德华李宏田守勤陶海征赵修建常海梅
Owner WUHAN UNIV OF TECH
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