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Gold-palladium alloy/carbon nitride composite nanomaterial and preparing method and application thereof

A technology of composite nanomaterials and gold-palladium alloys, applied in the field of electrocatalysts

Inactive Publication Date: 2015-04-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no one has found anyone using Au-Pd / g-C 3 N 4 Bimetallic composite nanomaterials to detect hydrogen peroxide, g-C 3 N 4 The chemical and physical properties are stable, the raw materials are cheap and easy to obtain, non-toxic, and the Au-Pd / g-C prepared by using it as a carrier 3 N 4 The bimetallic composite material has a simple process, and the resulting product has good electrocatalytic activity, and has great application prospects in the field of electrochemical detection of hydrogen peroxide

Method used

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  • Gold-palladium alloy/carbon nitride composite nanomaterial and preparing method and application thereof
  • Gold-palladium alloy/carbon nitride composite nanomaterial and preparing method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1 class graphitic nitrogen carbide (g-C 3 N 4 ) preparation

[0021] g-C 3 N 4 The preparation adopts the method of thermal polymerization of urea; weigh 10 g of urea in a semi-closed crucible and place it at 80 o C drying oven for 48 h, then transfer the crucible to the temperature-programmed tube furnace, and the temperature-programmed tube furnace was set at 2.3 o C / min heating rate to 550 o C and keep it warm for 4 h. After cooling down to room temperature naturally, take it out, grind it into powder with a mortar, and use a concentration of 0.01 mol L -1 dilute HNO 3 Wash 3 times to remove residual alkaline species, then wash 3 times with deionized water and absolute ethanol, and finally wash at 80 o C oven dried for 12 h.

Embodiment 21

[0022] Example 21%-1% Au-Pd / g-C 3 N 4 Preparation of Composite Nanomaterials

[0023] Weigh 0.1g g-C 3 N 4 Dissolve the powder in 100mL of pure water, then ultrasonically disperse for 0.5 h in an ultrasonic machine with a power of 250W, and then add 0.5 ml of 0.01 mol L -1 HAuCl 4 solution and 0.94 ml 0.01 mol L -1 h 2 PdCl 4solution, stirred magnetically for 0.5 h, and added dropwise 20ml of 0.15 mol L within 1 hour -1 NaBH 4 solution, magnetically stirred for 0.5 h; then cooled to room temperature in an oil bath at 100°C for 24 h, cooled to room temperature after reaction, washed, centrifuged, and dried to obtain Au, Pd and g-C 3 N 4 1%-1% Au-Pd / g-C with a mass ratio of 1% 3 N 4 composite nanomaterials.

Embodiment 3

[0024] Example 3 2% Pd / g-C 3 N 4 Preparation of Composite Nanomaterials

[0025] Weigh 0.1g g-C 3 N 4 The powder was dissolved in 100ml of pure water, then ultrasonicated for 0.5h in an ultrasonic machine with a power of 250W, and then 1.88ml of 0.01 mol L was added -1 h 2 PdCl 4 solution, magnetically stirred for 30 min, after complete mixing, 20ml of 0.15 mol L was added dropwise within 1 hour -1 NaBH 4 solution, after magnetic stirring for 30 min, react in an oil bath at 100°C for 24 h; after the reaction, cool to room temperature, wash, centrifuge, and dry to obtain 2% Pd / g-C 3 N 4 composite nanomaterials.

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Abstract

The invention relates to an electrocatalyst, in particular to a gold-palladium alloy / carbon nitride composite nanomaterial and a preparing method and application thereof. The preparing method comprises the steps that g-C3N4 powder is weighted and dissolved in purified water, and ultrasonic dispersion is carried out; an HAucl4 solution and an H2Pdcl4 solution are added into the mixture in sequence, magnetic stirring is carried out until the mixture is mixed evenly, and an NaBH4 solution is added in a dropwise mode, magnetic stirring is carried out until the mixture becomes uniform; an oil bath reaction is carried out; after the reaction is finished, the mixture is cooled to the indoor temperature; the gold-palladium alloy / carbon nitride composite nanomaterial is obtained after washing, centrifugal separating and drying are carried out. The composite nanomaterial can be used for electrochemical detection for hydrogen peroxide.

Description

technical field [0001] The invention relates to an electrocatalyst, in particular to a gold-palladium alloy / carbon nitride composite nanomaterial and its preparation method and application, especially a composite material preparation method with simple preparation process, stable product performance, and good electrocatalytic detection performance of hydrogen peroxide . technical background [0002] hydrogen peroxide (H 2 o 2 ) is a chemical widely used in the food, pharmaceutical, paper, and chemical industries. At the same time, it is also a by-product of the reaction catalyzed by a large number of oxidases, so the accurate and rapid detection of H 2 o 2 important in biochemistry and environmental science; with H 2 o 2 Compared to conventional techniques for the determination of electrochemical biosensing, enzyme-free detection of H 2 o 2 It has many advantages such as low cost, easy preparation, rapid detection, high selectivity, and sensitivity; at the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24G01N27/30
Inventor 姜德立孟令玉陈敏
Owner JIANGSU UNIV
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