Fenton reagent improved cyanation and usage thereof

Patent metadata

Field	Value
Publication number	US-9505628-B2
Application number	US-201415031197-A
Country	US
Kind code	B2
Filing date	Oct 27, 2014
Priority date	Oct 28, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

This disclosure provides a facial green method for metal cyanides preparation, including the following steps: 1) supported metal nanoparticles and Fenton's reagent are mixed with nitrile and then stirred to obtain suspension, wherein metal nanoparticles are selected from a nano metal, nano metal oxide and nano metal salt; 2) centrifuging the suspension to obtain a product and drying the product after stirring to obtain the metal cyanides. As prepared metal cyanides have broad application prospects in the fields of sensor, battery, medicine, electroplating and catalysis. This Fenton-improved cyanation (FIC) method may effectively exclude the toxicity from free cyanide anions and get rid of UV-light, being more energy-saving and more feasible for large-scale industrial production of MCs.

First claim

What is claimed is:

1. A method of preparation of metal cyanides, the method comprising:
1) mixing supported metal nanoparticles, Fenton's reagent, and nitrile to obtain suspension and stirring the suspension, the supported metal nanoparticles comprising carriers loading one or more compositions comprising at least one of a nano metal, a nano metal oxide and a nano metal salt;
2) centrifuging the suspension to obtain a product and drying the product to obtain the metal cyanides.

2. The method of claim 1 , wherein a molar ratio of the supported metal nanoparticles, metal ions of the Fenton's reagent, and -nitrile is about 0.01˜0.2:0.01˜0.2:100.

3. The method of claim 1 , wherein the nano metal is selected from Au, Ag, Pt, Pd, and Ru.

4. The method of claim 1 , wherein the nitrile of step 1) is acetonitrile or propionitrile.

5. The method of claim 1 , wherein a reaction temperature of step 1) is 10˜70° C., and a reaction time is more than 30 min.

6. The method of claim 5 , wherein a reaction temperature of step 1) is 30˜50° C., and a reaction time is more than 2 hours.

7. The method of claim 1 , wherein a molar ratio of metal ions of the Fenton's reagent and hydrogen peroxide is 1:10˜200.

8. The method of claim 1 , wherein a molar ratio of metal ions of the Fenton's reagent and hydrogen peroxide is 1:60˜100.

9. The method of claim 1 , wherein metal ions of the Fenton's reagent comprise at least one of Fe 2+ , Fe 3+ , Ni 2+ , Co 2+ , Mn 2+ or Cu 2+ .

10. The method of claim 1 , wherein a formula of the metal cyanides is selected from AuCN, AgCN, Pt(CN) 4 , Pd(CN) 2 , Ru(CN) 4 , Au x Ag 1-x CN, Au x Cu 1-x , CN, Ag x Cu 1-x CN, CuAu 2 (CN) 4 , and Au x Ag y Cu1-x-yCN, wherein 0<x and y<1.

11. The method of claim 1 , a size of the metal cyanides is in a nano-scale.

12. The method of claim 1 , wherein the nano metal oxide is Ag 2 O.

13. The method of claim 1 , wherein the nano metal salt is AgNO 3 .

Assignees

• Univ Zhejiang

Inventors

• Fan Jie
• Yi Wuzhong
• Li Renhong
• Zou Shihui
• Xiao Liping
• Lu Linfang

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J35/0013

  Operations & Transport · mapped topic

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• B01J23/52

  Gold · CPC title