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A method for synthesizing metal cyanides by fenton reagent

A cyanide and metal technology, applied in the field of chemistry, can solve problems such as difficulty in synthesizing multimetal cyanide, unstable product quality, and difficulty in controlling the degree of cyanide, and achieve energy saving and environmental protection in the reaction route, no light pollution, and mild reaction conditions Effect

Active Publication Date: 2016-08-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method overcomes the problem of cyanide ion in the traditional process, but this method needs to use relatively expensive ultraviolet light, which is prone to light pollution and is difficult to realize industrialization
At the same time, through further research, it has been found that the degree of cyanation of gold cyanide synthesized by ultraviolet light cyanation is difficult to control, the product quality is unstable, and it is difficult to synthesize multimetal cyanides.

Method used

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  • A method for synthesizing metal cyanides by fenton reagent
  • A method for synthesizing metal cyanides by fenton reagent
  • A method for synthesizing metal cyanides by fenton reagent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix 0.8 mg of nano-gold supported on silica, 2 mL of acetonitrile, 22 mg of ferrous sulfate heptahydrate, and 0.8 mmol of hydrogen peroxide, and stir at 30°C for 4 hours. The color of the solid gradually changes from red to bean paste green; the product is centrifuged, Silica-supported gold cyanide (AuCN) was obtained after drying treatment. figure 1 This is the XRD spectrum of the gold cyanide, in which it can be seen that the product is pure gold cyanide, the gold is completely cyanided, and no ferricyanide is generated.

Embodiment 2

[0045] Mix 2mg of nano-gold loaded on silica, 3mL of acetonitrile, 3mg of ferrous sulfate heptahydrate, and 1mmol of hydrogen peroxide, and stir at 70°C for 30 minutes, the color of the solid gradually changes from red to bean paste green; the product is centrifuged and dried Finally, silica-supported gold cyanide (AuCN) was obtained. image 3 is a transmission electron micrograph of gold cyanide (AuCN). No ferricyanide was detected.

Embodiment 3

[0047] Mix 10 mg of nano-gold loaded on silica, 1.3 mL of propionitrile, 30 mg of ferrous sulfate heptahydrate, and 21 mmol of hydrogen peroxide, and stir at 10°C for 48 hours. The color of the solid gradually changes from red to bean paste green; the product is centrifuged, Silica-supported gold cyanide (AuCN) was obtained after drying treatment. Figure 4 It is the XPS spectrum of gold cyanide (AuCN), showing Au4f 5 / 2 and Au4f 7 / 2 The peak position of corresponds to that of Au(I). No ferricyanide was detected.

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Abstract

The invention provides a simple, convenient and completely green synthesis method of metal cyanides. Mix nano-gold (or nano-silver, nano-silver oxide, silver nitrate, nano-platinum, nano-palladium, nano-ruthenium) loaded on a conventional carrier, Fenton's reagent and nitrile to form a suspension system, and synthesize metal cyanide in a certain temperature step . The product is uniformly dispersed and crystallized well. The present invention uses Fenton's reagent to synthesize metal cyanide for the first time, has obtained single metal cyanide such as gold cyanide, silver cyanide, palladium cyanide, ruthenium cyanide, platinum cyanide, and gold silver cyanide, cyanide Binary metal cyanides such as gold copper, silver copper cyanide, and copper cyanurate, and ternary metal cyanides such as gold silver copper cyanide. The synthesis process neither involves CN--a highly toxic substance, nor does it require the use of ultraviolet light. It is a completely green method for synthesizing metal cyanides, which is suitable for large-scale industrial production. The synthesized supported nano metal cyanide has broad application prospects in the fields of sensing, battery, medicine, electroplating and catalysis.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a method for synthesizing metal cyanides by Fenton's reagent. Background technique [0002] Fenton's reagent, discovered by the chemist Fenton in 1894, is a kind of hydrogen peroxide and catalyst Fe 2+ Oxidation system composed of Fe 2 + ions are mainly used as homogeneous catalysts, while H 2 o 2 Oxidizes. Due to the advantages of rapid reaction, mild reaction conditions such as temperature and pressure, and no secondary pollution, Fenton reagent is used in industrial wastewater treatment, especially some difficult-to-treat or biologically toxic industrial wastewater (such as cyanide-containing wastewater) The application of it has attracted more and more attention at home and abroad. Generally, under slightly acidic conditions, such as pH = 3.5, this reagent has strong oxidizing properties, and has a very obvious effect on the oxidation of organic compounds such as carboxylic ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C3/08
CPCC01C3/08C01P2002/72C01P2002/82C01P2004/04B01J21/08B01J23/52B01J23/89C01C3/11B01J35/45B01J35/23
Inventor 范杰易武中李仁宏邹世辉肖丽萍鲁林方
Owner ZHEJIANG UNIV
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