Novel method for preparing metal cyanide nanoparticles

A nanoparticle and cyanide technology, which is applied in the field of preparation of metal cyanide nanoparticles, can solve the problems that no one has publicly reported the application of AuCN nanoparticles, and achieve the effect of controllable particle size and simple reaction process

Active Publication Date: 2013-02-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, no one has publicly reported the preparation of AuCN nanoparticles and their applications in fields such as catalysis.

Method used

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  • Novel method for preparing metal cyanide nanoparticles
  • Novel method for preparing metal cyanide nanoparticles
  • Novel method for preparing metal cyanide nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, mix 10 mg nano-gold loaded mesoporous silica, 2 mL acetonitrile, and 100 μmol benzaldehyde, and stir; place the above suspension under a 350-watt mercury lamp, stir and illuminate, and the illumination time is 2 hours , the color of the solid gradually changed from red to green; the product was centrifuged and dried to obtain nano-gold cyanide-loaded mesoporous silica. figure 1 It is a transmission electron microscope photo of the nano-gold cyanide, from which it can be obtained that the product is nano-particles, uniformly dispersed, and the particle diameter is 10-30 nanometers.

Embodiment 2

[0032] Mix 100 mg of supported gold nanoparticles, 4 mL of acetonitrile, and 200 μmol of benzyl alcohol together and stir; then place the above suspension under a 350-watt mercury lamp, stir and illuminate for 5 hours, and the color of the solid is as follows: The red color gradually changed to green; the product was centrifuged and dried to obtain loaded nano-gold cyanide. figure 2 It is the XRD pattern of this nano-gold cyanide, the product is pure gold cyanide, and its chemical formula is AuCN.

Embodiment 3

[0034] Mix 500 mg of supported gold nanoparticles, 5 mL of acetonitrile, and 500 μmol of hydrogen peroxide, and stir; then place the above suspension under a 350-watt mercury lamp, stir and illuminate for 10 hours, and the color of the solid changes from red to Gradually turn into green or even white; the product is centrifuged and dried to obtain loaded nano-gold cyanide. image 3 is the XPS spectrum of AuCN nanoparticles, showing Au4f 5 / 2 and Au4f 7 / 2 The peak position of corresponds to that of Au(I).

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Abstract

The invention discloses a green method for synthesizing auric cyanide (AuCN) and nanoparticles of other transition metal cyanides (such as AgCN, CuCN, Pt(CN)4, Pd(CN)2, Ru(CN)4 and the like). The method comprises the following steps of loading auric cyanide (or nanoparticles of metal cyanides of silver, silver oxide, copper, copper oxide, ruthenium, platinum, palladium and the like) on conventional porous carriers (such as porous materials of silica, alumina, titanium oxide, carbon, polymers and the like), mixing the conventional porous carriers obtained by the previous step, benzaldehyde (orbenzaldehyde and hydrogen peroxide) and acetonitrile to obtain a turbid system, and carrying out one-step synthesis under ultraviolet irradiation to obtain transition metal cyanide nanoparticles. Products prepared by the method have the advantages of uniform dispersity, good crystallization and favorable particle size of 1 to 100 nanometers.

Description

technical field [0001] The invention relates to a preparation method of metal cyanide nanoparticles. Background technique [0002] Cyanide refers to the substance containing cyano group (-C≡N) in the compound molecule. According to whether the element or group connected to the cyano group is organic or inorganic, cyanide can be divided into two categories, namely organic cyanide and inorganic cyanide. The former is called nitrile, and the latter is often referred to simply as cyanide. Cyanide is an important gold leaching solvent in the gold industry, and most gold production enterprises use cyanide. Among them, the representative cyanides are Prussian blue, gold cyanide and so on. [0003] Here we take gold cyanide as an example. The chemical formula of gold cyanide is AuCN, the molecular weight is 222.98, the specific gravity is 7.12, and the English name is Gold(I) Cyanide. It is a chain-like inorganic polymer, and it is a hexagonal lemon yellow fine crystal. It is sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/26
Inventor 范杰李仁宏邹世辉
Owner ZHEJIANG UNIV
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