Method for selectively recycling noble metal ions of gold and silver

Abstract

The invention provides a method for selectively recycling noble metal ions of gold and silver. The method comprises the following steps: 1, a carbon tube undergoes reflux treatment in a nitric acid solution to form a carboxylation carbon tube; 2, a carbon tube film is prepared by macroscopic interface recombination of a carboxylation carbon nano tube; 3, a macroscopic carbon tube thin film is tightly pressed to form a transferable self-supporting carbon tube thin film; 4, the carbon tube thin film is transferred to the surface of a dopamine aqueous solution so as to form an asymmetric carbon tube composite thin film; 5, the asymmetric carbon tube composite thin film is transferred to the surface of an aqueous solution, and residual impurities are cleaned and removed to obtain a macroscopic carbon tube interface reactor; 6, the carbon tube composite thin film is transferred to the surface of noble metal waste liquid; 7, the carbon tube composite thin film is transferred to the surface of the noble metal waste liquid to form a carbon tube and noble metal nanoparticle composite thin film material; and 8, the noble metal nanoparticle material is recycled and utilized. The method is simple to operate and high in selectivity.

Description

Technical field [0001] The invention relates to a method for analyzing and testing precious metal materials, in particular to a method for selective recovery and utilization of gold and silver precious metal ions. Background technique [0002] Due to their unique physical and chemical properties, precious metals such as gold, silver, palladium and platinum are widely used in modern technology and industrial fields such as aerospace, electronics, communications, computers, photographic equipment, automobiles, and petrochemicals. Industrial products containing precious metal materials become waste products after a certain period of use. A large part of these waste products are waste liquids containing precious metal ions. The precious metal waste liquids not only easily cause serious environmental pollution problems, but also cause the waste of rare resources and precious metals. How to deal with these waste liquids has become an urgent problem to be solved. At present, recovering...

AI Technical Summary

Problems solved by technology

The precious metal ions in the waste liquid can be reduced to precious metal materials by means of chemical or electrochemical reduction, but the selectivity of the recovery of precious metal materials by the current reduction method is low, which is likely to cause secondary chemical pollution, and the recovered precious metals have to go through follow-up can be used only after processing

Images