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Method for synthesizing metal cyanides by use of Fenton reagent

A cyanide and metal technology, applied in the chemical field, can solve the problems of difficult synthesis of multimetal cyanide, unstable product quality, light pollution, etc., and achieve the effect of energy saving and environmental protection of the reaction route, no light pollution, and simple reaction process

Active Publication Date: 2015-04-29
ZHEJIANG UNIV
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  • 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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  • Method for synthesizing metal cyanides by use of Fenton reagent
  • Method for synthesizing metal cyanides by use of Fenton reagent
  • Method for synthesizing metal cyanides by use of Fenton reagent

Examples

Experimental program
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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

Provided is a preparation method of metal cyanide, comprising the following steps: 1) mixing supported metal nanoparticles, a Fenton reagent and nitrile to form suspension, and then stirring, the supported metal nanoparticles being a complex wherein the supporter supports nano metal supports nano metal, nano metal oxide or nano metal salt; and 2) centrifugalizing and drying a product after stirring to obtain the metal cyanide. Also provided are the prepared metal cyanide and the use of same in the fields of sensing, batteries, medicine, electroplating and catalysis. The preparation method does not relate to highly toxic substance CN -, does not require ultraviolet light, is an entirely green method for synthesizing metal cyanide, and applies to industrial production of a large scale.

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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IPC IPC(8): C01C3/08
CPCC01C3/08C01P2002/72C01P2002/82C01P2004/04B01J21/08B01J23/52B01J23/89C01C3/11B01J35/23
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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