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A kind of pd/nial metal oxide film electrode and its preparation method and application

A technology of oxide film and membrane electrode, which is applied in the field of water treatment, can solve problems such as the follow-up treatment of acid radical ions, and achieve the best effect, simple preparation method, and large specific capacitance.

Active Publication Date: 2021-01-01
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

However, the subsequent treatment of the adsorbed acid ions is still a problem.

Method used

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  • A kind of pd/nial metal oxide film electrode and its preparation method and application
  • A kind of pd/nial metal oxide film electrode and its preparation method and application
  • A kind of pd/nial metal oxide film electrode and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The Pd / NiAl-LMO membrane electrode and NiAl-LMO membrane electrode of this embodiment are prepared by the following method:

[0043] Configure 1.2mol / L NiCl 2 , 0.4mol / L AlCl 3 Mixture A (one group added PdCl 2 , a group without PdCl 2 ), and configure a certain concentration of NaOH, Na 2 CO 3 For mixed solution B, add an appropriate amount of mixed solution B solution to 100ml mixed solution A solution, and adjust the pH of mixed solution A to 9.5-10.5. Add the pH-adjusted mixed solution into a 100ml reaction kettle, put a piece of pretreated nickel foam, and put the reaction kettle in an oven at 100°C for 10 hours. After the reaction kettle was cooled to room temperature, the reacted nickel foam was dried in an oven at 60°C for 12 hours, and then the electrode was calcined in a tube furnace at 500°C for 4 hours, and heated under H 2 The Pd / NiAl-LMO membrane electrode and the NiAl-LMO membrane electrode can be obtained by calcining at 250°C for 3h in air atmosph...

Embodiment 2

[0048] The Pd / NiAl-LMO membrane electrode and NiAl-LMO membrane electrode of this embodiment are prepared by the following method:

[0049] Configure 1.2mol / L NiCl 2 , 0.4mol / L AlCl 3 Mixture A (one group added PdCl 2 , a group without PdCl 2 ), and configure a certain concentration of NaOH, Na 2 CO 3 For mixed solution B, add an appropriate amount of mixed solution B solution to 100ml mixed solution A solution, and adjust the pH of mixed solution A to 9.5-10.5. Add the pH-adjusted mixed solution into a 100ml reaction kettle, put a piece of pretreated nickel foam, and put the reaction kettle in an oven at 100°C for 10 hours. After the reaction kettle was cooled to room temperature, the reacted nickel foam was dried in an oven at 60°C for 12 hours, and then the electrode was calcined in a tube furnace at 500°C for 4 hours, and heated under H 2 The Pd / NiAl-LMO membrane electrode and the NiAl-LMO membrane electrode can be obtained by calcining at 250°C for 3h in air atmosph...

Embodiment 3

[0052] During the experiment, the NaNO 3 The initial concentration of the solution was set to 0.003mol / L. Using the Pd / NiAl-LMO membrane electrode as the working electrode, the NO 3 - Electrosorption was carried out, and the adsorption reached equilibrium when the adsorption time was 2.5 h. Then, by inverting the cathode and anode, the nitrate ion is electroreduced, and it is converted into harmless nitrogen for removal. Through the speciation analysis of nitrogen-containing ions during the experiment, it can be known that the Pd / NiAl-LMO membrane electrode will NO 3 - Revert to NO first 2 - , NO 2 - further reduced to N 2 removal, the by-product NH 4 + and a very small amount of N 2 O, NO.

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Abstract

The invention provides a Pd / NiAl metal oxide film electrode as well as a preparation method and application thereof. According to the Pd / NiAl metal oxide film electrode provided by the invention, the mass of Pd accounts for 1 percent to 10 percent of the mass of the Pd / NiAl metal oxide film electrode. According to the Pd / NiAl metal oxide film electrode provided by the invention, Ni, Al and Pd are deposited on foam nickel through in-situ hydrothermal reaction to obtain Pd / NiAl-LMO membrane electrode materials with different Pd deposition amounts. According to the Pd / NiAl metal oxide film electrode, the prepared Pd / NiAl-LMO membrane electrode can be used as a capacitive deionization electrode; when being used as a positive electrode, the Pd / NiAl-LMO membrane electrode can be used for adsorbing acid group ions in water in a charging process; when the Pd / NiAl-LMO membrane electrode is used as a negative electrode, the acid group ions are converted into a harmless product under the catalysis effect of Pd atoms in a discharging process; meanwhile, the electrode is regenerated and concentrated wastewater of acid salt is not generated in a capacitive deionization process.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a Pd / NiAl metal oxide film electrode, a preparation method and application thereof. Background technique [0002] In recent years, nitrate pollution incidents in water bodies have attracted the attention of researchers. Excessive concentrations of nitrates, bromates, and perchlorates in drinking water can cause methemoglobinemia in infants and young children, as well as the risk of intestinal cancer in adults. Therefore, exploring an efficient and environmentally friendly treatment method for acid radical ions has become an important problem to be solved. [0003] Capacitive deionization technology has attracted the attention of researchers for its advantages of energy saving, no secondary pollution, and fast regeneration. From the perspective of mechanism, under the action of an external electric field, capacitive deionization technology removes salt ions in water throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F101/16C02F101/12
CPCC02F1/4691C02F2101/12C02F2101/163
Inventor 胡承志董晶晶王婷刘会娟曲久辉刘锐平兰华春
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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