CeO2/CuO (cerium oxide/copper oxide) heterojunction composite oxide and preparation method and application thereof

A composite oxide, heterojunction technology, applied in chemical instruments and methods, separation methods, instruments, etc., can solve the problems of inaccurate detection results of sensors, poor CuO selectivity, etc., and achieve easy integration and portability, low cost, and preparation. Simple process effect

Active Publication Date: 2019-01-01
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor selectivity of CuO and inaccurate detection results of prepare

Method used

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  • CeO2/CuO (cerium oxide/copper oxide) heterojunction composite oxide and preparation method and application thereof
  • CeO2/CuO (cerium oxide/copper oxide) heterojunction composite oxide and preparation method and application thereof
  • CeO2/CuO (cerium oxide/copper oxide) heterojunction composite oxide and preparation method and application thereof

Examples

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Example Embodiment

[0056] Example 1

[0057] The embodiment of the present invention provides a cerium oxide / copper oxide heterojunction composite oxide, including a CuO substrate and CeO supported on the surface of the CuO substrate 2 , The chemical formula is: xCeO 2 / yCuO, where x:y=1:10, and the particle size is 0.5-2μm.

[0058] The method for preparing the cerium oxide / copper oxide heterojunction composite oxide includes the following steps:

[0059] Step a, prepare CuO substrate

[0060] Weigh 1.8756g of copper nitrate and place it in a 50mL small beaker, add 15mL of deionized water, and then add 10mL of absolute ethanol to dissolve to obtain a copper nitrate ethanol aqueous solution; Weigh 0.6006g of urea, add 10mL of deionized water to dissolve to obtain a urea aqueous solution;

[0061] Under magnetic stirring, drop the urea aqueous solution into the copper nitrate ethanol aqueous solution, ultrasonically treat it for 20 minutes, add it to a 50mL polytetrafluoroethylene lined autoclave, and hydr...

Example Embodiment

[0067] Example 2

[0068] The embodiment of the present invention provides a cerium oxide / copper oxide heterojunction composite oxide, including a CuO substrate and CeO supported on the surface of the CuO substrate 2 , The chemical formula is: xCeO 2 / yCuO, where x:y=1.5:9, and the particle size is 0.5-2μm.

[0069] The method for preparing the cerium oxide / copper oxide heterojunction composite oxide includes the following steps:

[0070] Step a, prepare CuO substrate

[0071] Weigh 2.12g of copper nitrate into a 50mL small beaker, add 10mL of deionized water, and then add 15mL of absolute ethanol to dissolve to obtain a copper nitrate ethanol aqueous solution; Weigh 0.72g of urea, add 10mL of deionized water to dissolve to obtain a urea aqueous solution;

[0072] Under magnetic stirring, drop the urea aqueous solution into the copper nitrate ethanol aqueous solution, ultrasonically treat it for 25 minutes, add it to a 50mL polytetrafluoroethylene-lined autoclave, and hydrothermally tre...

Example Embodiment

[0078] Example 3

[0079] The embodiment of the present invention provides a cerium oxide / copper oxide heterojunction composite oxide, including a CuO substrate and CeO supported on the surface of the CuO substrate 2 , The chemical formula is: xCeO 2 / yCuO, where x:y=0.8:11, and the particle size is 0.5-2μm.

[0080] The method for preparing the cerium oxide / copper oxide heterojunction composite oxide includes the following steps:

[0081] Step a, prepare CuO substrate

[0082] Weigh 1.65g of copper nitrate into a 50mL small beaker, add 13mL of deionized water, and then add 12mL of absolute ethanol to dissolve to obtain a copper nitrate ethanol aqueous solution; Weigh 0.49g of urea, add 10mL of deionized water to dissolve to obtain a urea aqueous solution;

[0083] Under magnetic stirring, drop the urea aqueous solution into the copper nitrate ethanol aqueous solution, ultrasonically treat it for 15 minutes, add it to a 50mL polytetrafluoroethylene-lined autoclave, and hydrothermally tr...

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Abstract

The invention relates to the technical field of metal oxide semiconductor sensors, in particular to a CeO2/CuO (cerium oxide/copper oxide) heterojunction composite oxide and a preparation method and application thereof. The CeO2/CuO heterojunction composite oxide comprises a CuO substrate and CeO2, wherein the CeO2 is loaded at the surface of the CuO substrate. A chemical molecular formula is xCeO2/yCuO, wherein the ratio of x to y is (0.8 to 1.5):(9 to 11); the particle size is 0.5 to 2mum. The preparation method comprises the following steps of synthesizing the CuO substrate by a hydrothermal method; precipitating Ce(OH)4 (cerium hydroxide) at the surface of the CuO substrate by the hydrothermal method, and treating by the same hydrothermal temperature and time; finally, calcining, so asto obtain the CeO2/CuO heterojunction composite oxide. Compared with the single CuO substrate, the CeO2/CuO heterojunction composite oxide has the advantage that more active sites are provided, so that the better gas-sensitive property is realized on H2S (hydrogen sulfide), the content of H2S can be more accurately detected, and the decomposing condition of SF6 (sulfur hexafluoride) can be more accurately monitored.

Description

technical field [0001] The invention relates to the technical field of metal oxide semiconductor sensors, in particular to a cerium oxide / copper oxide heterojunction composite oxide and a preparation method and application thereof. Background technique [0002] SF 6 Gas-insulated equipment has a series of advantages such as fast installation, small footprint, safe and reliable operation, less maintenance workload and long maintenance cycle, and has been widely used in power systems. However, since SF 6 Various defects may occur in the manufacture, installation or operation of gas insulated equipment, and then discharge (arc discharge, spark discharge, partial discharge) and overheating faults may occur, and cause SF 6 The gas decomposes to produce H 2 S, SO 2 , CO and other characteristic gases will reduce the insulation performance of the equipment and endanger the personal safety of the operation and maintenance personnel. Research at home and abroad shows that: SF ca...

Claims

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Application Information

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IPC IPC(8): B01D53/52B01D53/76G01N27/12
CPCB01D53/52B01D53/76G01N27/127
Inventor 刘克成张立军马慧芳王艳孟立会
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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