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Preparation method of nearly spherical Rh2O3 nano material

A nanomaterial, near spherical technology

Active Publication Date: 2021-11-05
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

But so far, about Rh 2 o 3 There are very few reports on the research and preparation of nanomaterials, which will seriously restrict the development of Rh 2 o 3 Application Prospects of Nanomaterials in Catalysis and Other Fields

Method used

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  • Preparation method of nearly spherical Rh2O3 nano material
  • Preparation method of nearly spherical Rh2O3 nano material
  • Preparation method of nearly spherical Rh2O3 nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The Rh provided in this example 2 o 3 The preparation method of nanometer material, comprises the following steps:

[0044] (1) Cut the high-purity gold tube with a diameter of 5mm into the length required for the experiment (1.5-2.5cm), and carry out pre-treatments such as pickling, washing, quenching, and one end of the welding seal in advance to ensure that there are no impurities and cracks in the gold tube;

[0045] (2) Potassium chlororhodate (K 3 RhCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.002mol / L K 3 RhCl 6 solution, use a sample injector to put the prepared reaction solution into the gold tube, control the filling degree to about 50%, and seal it. Dry box for 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;

[0046] (3) Put the gold tube, which is confirmed to be well sealed and equipped with a solution sample,...

Embodiment 2

[0052] The Rh provided in this example 2 o 3 The preparation method of nanometer material, comprises the following steps:

[0053] (1) the pretreatment of gold tube is the same as embodiment 1;

[0054] (2) Potassium chlororhodate (K 3 RhCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.002mol / L K 3 RhCl 6 solution, use a sample injector to put the prepared reaction solution into the gold tube, control the filling degree to about 50%, and seal it. Dry box for 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;

[0055] (3) Put the gold tube, which is confirmed to be well-sealed and contains the solution sample, into the high-temperature and high-pressure reactor. After tightening the reactor, check the tightness of the reactor. After confirming that it is correct, inject argon gas into the reactor through the ventilation pipe to a pressur...

Embodiment 3

[0061] The near-spherical Rh provided by this embodiment 2 o 3 The preparation method of nanometer material, comprises the following steps:

[0062] (1) the pretreatment of gold tube is the same as embodiment 1;

[0063] (2) Potassium chlororhodate (K 3 RhCl 6 ) powder was dissolved in 100mL deionized water, fully dissolved to obtain 0.002mol / L K 3 RhCl 6 solution, use a sample injector to put the prepared reaction solution into the gold tube, control the filling degree to about 50%, and seal it. Dry box for 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;

[0064] (3) Put the gold tube, which is confirmed to be well-sealed and contains the solution sample, into the high-temperature and high-pressure reactor. After tightening the reactor, check the tightness of the reactor. After confirming that it is correct, inject argon gas into the reactor through the ventilation...

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Abstract

The invention discloses a preparation method of a nearly spherical Rh2O3 nano material, which mainly comprises the following steps of: (1) dissolving potassium rhodium chloride in deionized water to obtain a potassium a dilute rhodium chloride solution, putting the potassium rhodium chloride into a gold tube, and sealing the gold tube; (2) placing the sealed gold tube in a hydrothermal reaction kettle, adjusting the temperature in the hydrothermal reaction kettle to 200-500 DEG C and the reaction pressure to 100 MPa, and carrying out a hydrolysis reaction for 24 hours; and (3) after the hydrolysis reaction, opening the hydrothermal reaction kettle, taking out the gold tube, breaking the gold tube, recovering the residual solution in the gold tube, cleaning the inner wall of the gold tube, and then drying to obtain the nearly spherical Rh2O3 nano material. According to the method, the raw materials are single and easy to obtain, the process is simple, the synthesized Rh2O3 nano material is nearly spherical nano particles, the crystal form is intact, and the particle size of the nano particles is dozens of nanometers to hundreds of nanometers.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a near-spherical Rh 2 o 3 Preparation methods of nanomaterials. Background technique [0002] Rhodium trioxide (Rh 2 o 3 ) is a new type of important nanomaterials, mainly used in catalysts such as hydroformylation, formylation and hydroxylation, and contains Rh 2 o 3 Nanomaterials have good catalytic and electrical conductivity, and are often used as components of photoelectric catalysts and electrode resistance materials (Li Shuben.1988.Rh 2 o 3 / CdS Surface State and Photocatalytic Activity. Molecular Catalysis. (04): 217-223; Liu Huan et al. 2016.Rh 2 o 3 / Mesoporous MOx-Al 2 o 3 (M=Mn, Fe, Co, Ni, Cu, Ba) Catalysts: Synthesis, Characterization and Catalytic Applications. Acta Catalytica Sinica. (37): 82; He Yunkai et al. 1986. Visible light photolysis of H 2 S produces H 2 Research - Rh 2 o 3 Photolysis of sulfide aqueous solution in / CdS suspension syste...

Claims

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Application Information

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IPC IPC(8): C01G55/00B82Y30/00B82Y40/00
CPCC01G55/004B82Y30/00B82Y40/00C01P2004/64C01P2004/62C01P2004/32C01P2002/82C01P2004/03
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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