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PFC (photocatalytic fuel cell) system and method for recovering noble metal silver and degrading organic matter simultaneously and photoelectrocatalytically

A technology of fuel cell and photoelectric catalysis, which is applied in the field of catalysis, can solve the problem that silver is difficult to meet the emission standard, and achieve the effect of efficient recovery, energy saving and resource saving

Active Publication Date: 2018-07-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the biggest advantage of electrolysis and metal replacement method is that it can recover metallic silver with high purity, but it is only suitable for the recovery of silver in high-concentration silver-containing wastewater, and the concentration of silver in the treated wastewater is still difficult to meet the discharge standard

Method used

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  • PFC (photocatalytic fuel cell) system and method for recovering noble metal silver and degrading organic matter simultaneously and photoelectrocatalytically
  • PFC (photocatalytic fuel cell) system and method for recovering noble metal silver and degrading organic matter simultaneously and photoelectrocatalytically
  • PFC (photocatalytic fuel cell) system and method for recovering noble metal silver and degrading organic matter simultaneously and photoelectrocatalytically

Examples

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Embodiment 1

[0054] Example 1 A photocatalytic fuel cell system and its method for photocatalytically recovering precious metal silver while degrading organic matter

[0055] A photocatalytic fuel cell photoelectric catalysis system, the photocatalytic fuel cell system comprises a bismuth vanadate film electrode photoanode, a cupric oxide / cuprous oxide heterojunction film electrode photocathode and an electrolyte solution.

[0056] Wherein, the preparation method of the bismuth vanadate anode is: the deposition solution of the precursor bismuth oxyiodide is prepared by mixing 100mL of nitric acid aqueous solution with pH=1.2 containing 0.0075M bismuth nitrate and 0.4M sodium iodide with 45mL of 0.3M p-benzene Prepared by mixing ethanol solutions of quinones. The bismuth oxyiodide electrode is obtained by electrodeposition, wherein the applied voltage is -0.1V in the electrodeposition method, FTO is the working electrode, the counter electrode is platinum wire, and the reference electrode i...

Embodiment 2

[0065] Example 2 A photocatalytic fuel cell system and its method for photocatalytically recovering precious metal silver while degrading organic matter

[0066] The preparation method of the photocatalytic system of the photocatalytic fuel cell is the same as that in Example 1.

[0067] The method for utilizing the photocatalytic fuel cell system to photocatalytically recover precious metal silver while degrading organic matter includes the following steps as described in Example 1, except that the silver nitrate concentration in step (1) is 40 mg / L. The final degradation rate of phenol and the recovery rate of silver ions were 83.7% and 100%, respectively.

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Abstract

The invention belongs to the technical field of catalysis and provides a PFC (photocatalytic fuel cell) system. The PFC system comprises a bismuth vanadate membrane electrode photoanode, a copper oxide / cuprous oxide heterojunction membrane electrode photocathode and an electrolyte solution. The PFC system has the beneficial effects that an external power supply is not needed when the PFC system isused for recovering noble metal silver and degrading organic matter simultaneously and photoelectrocatalytically in wastewater, low-concentration noble metal silver ions in the wastewater can be recovered efficiently, and the organic matter can be removed effectively.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a photocatalytic fuel cell system and a method for using the photocatalytic fuel cell system to photoelectrically recycle precious metal silver and simultaneously degrade organic matter. Background technique [0002] Silver is a naturally occurring precious metal with limited reserves and relatively limited output. It is widely used in industries such as electronics, chemicals, and photosensitive materials. However, silver-containing wastewater is often produced in the production and application of silver. Since silver ions are highly toxic to humans and animals, the removal and recovery of silver must be considered. The recovery and treatment of precious metal silver not only has environmental protection value, but also has important social and economic significance. [0003] At present, the main methods of silver recovery are electrolysis, metal replacement, ion exchange and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/46H01M4/90H01M8/08C02F101/30
CPCC02F1/30C02F1/46C02F2101/30H01M4/9016H01M8/08Y02E60/50
Inventor 赵旭李霞
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI