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Method for preparing PtO2 conical nano granular material

A nanoparticle and cone-shaped technology is applied in the field of preparation of PtO2 cone-shaped nanoparticle materials, which can solve the problems of low PtO2 purity, complex process and high cost, and achieve the effects of low cost, simple process and easy control.

Active Publication Date: 2019-09-10
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various synthetic PtO 2 The process of the material is relatively complicated, the cost is high, and the obtained PtO 2 low purity
This restricts the PtO to some extent 2 The application and promotion of nanoparticle materials as catalysts in various industries

Method used

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  • Method for preparing PtO2 conical nano granular material
  • Method for preparing PtO2 conical nano granular material
  • Method for preparing PtO2 conical nano granular material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The PtO provided by this embodiment 2 The preparation method of conical nanoparticle, comprises the following steps:

[0034] (1) Cut the high-purity gold tube with a diameter of 4mm into the length required for the experiment, and carry out pre-treatments such as pickling, washing, quenching, and one end welding seal in advance to ensure that there are no impurities and cracks in the gold tube;

[0035] (2) Potassium chloroplatinate (K 2 PtCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.01mol / L K 2 PtCl 6 solution, put about 0.1mL of the prepared reaction solution into a gold tube, control the filling degree to about 40% to 50%, and seal it by welding. 110°C drying oven for more than 2 hours, and then weigh again to ensure that the weight error before and after weighing is less than 0.001g, indicating that the gold tube is well sealed;

[0036](3) Put the gold tube, which is confirmed to be well-sealed and contains the solution sa...

Embodiment 2

[0042] The PtO provided by this embodiment 2 The preparation method of conical nanoparticle, comprises the following steps:

[0043] (1) the pretreatment of gold tube is the same as embodiment 1;

[0044] (2) Potassium chloroplatinate (K 2 PtCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.01mol / L K 2 PtCl 6 solution, put about 0.1mL of the prepared reaction solution into a gold tube, control the filling degree to about 40% to 50%, and seal it by welding. 110°C drying oven for more than 2 hours, and then weigh again to ensure that the weight error before and after weighing is less than 0.001g, indicating that the gold tube is well sealed;

[0045] (3) Put the gold tube, which is confirmed to be well-sealed and contains the solution sample, into a high-temperature and high-pressure reactor, and inject deionized water as a medium. After tightening the reactor, check the tightness of the reactor. Inject argon gas to a pressure of 60MPa, as t...

Embodiment 3

[0051] The PtO provided by this embodiment 2 The preparation method of conical nanoparticle, comprises the following steps:

[0052] (1) the pretreatment of gold tube is the same as embodiment 1;

[0053] (2) Potassium chloroplatinate (K 2 PtCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.01mol / L K 2 PtCl 6 solution, put about 0.1mL of the prepared reaction solution into a gold tube, control the filling degree to about 40% to 50%, and seal it by welding. 110°C drying oven for more than 2 hours, and then weigh again to ensure that the weight error before and after weighing is less than 0.001g, indicating that the gold tube is well sealed;

[0054] (3) Put the gold tube, which is confirmed to be well-sealed and contains the solution sample, into a high-temperature and high-pressure reactor, and inject deionized water as a medium. After tightening the reactor, check the tightness of the reactor. Inject argon gas to a pressure of 60MPa, as t...

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Abstract

The invention discloses a method for preparing a PtO2 conical nano granular material. The method comprises the following steps: preparing a potassium chloroplatinate diluted solution, putting the potassium chloroplatinate diluted solution into a metallic tube, sealing the metallic tube, putting the metallic tube into a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle, and carrying out a self hydrolysis reaction under conditions of a set temperature and pressure, so as to obtain the PtO2 conical nano granular material, wherein the temperature is 200-600 DEG C, the pressureis 100-200Mpa, and the self hydrolysis reaction time is 1-48 hours. The method is easy in raw material obtaining, low in cost, precise and efficient in experiment process and low in energy consumption, and PtO2 conical nano granules prepared by using the method have particle sizes from tens to hundreds of nanometers, have irregular conical structures, and have complete crystal forms.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a PtO 2 Preparation method of conical nanoparticle material. Background technique [0002] PtO 2 As a highly active catalyst material, it has been widely used in battery electrodes and various chemical catalytic reactions. With the improvement of the synthesis process of nanocomposites and the development of the functions of nanocomposites, more and more attention has been paid to the synthesis route and process of nano-micron platinum dioxide. [0003] Currently PtO 2 The general synthesis process is to use chloroplatinic acid or ammonium chloroplatinate and sodium nitrate to eutectically prepare at 500°C. This preparation process was first prepared by Roger Adams and his student V.Voorhees. Its specific preparation method is to add sodium nitrate in a 50mL beaker, then add 10% chloroplatinic acid or ammonium chloroplatinate solution, evaporate to dryness, and keep st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00B82Y40/00
CPCB82Y40/00C01G55/004C01P2002/82C01P2004/03C01P2004/30C01P2004/61C01P2004/62C01P2004/64
Inventor 严海波丁兴刘灼瑜孙卫东
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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