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2-ethylanthraquinone/activated carbon-expanded graphite composite electrode, and preparation method and application thereof

An ethyl anthraquinone and expanded graphite technology, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of poor oxygen reduction cathode conductivity and low degradation efficiency of organic pollutants, etc. Good catalytic effect, reduced energy consumption and low price

Inactive Publication Date: 2014-07-23
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the problems of poor conductivity of the oxygen reduction cathode used for degradation of wastewater containing organic pollutants and low efficiency of degradation of organic pollutants

Method used

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  • 2-ethylanthraquinone/activated carbon-expanded graphite composite electrode, and preparation method and application thereof
  • 2-ethylanthraquinone/activated carbon-expanded graphite composite electrode, and preparation method and application thereof
  • 2-ethylanthraquinone/activated carbon-expanded graphite composite electrode, and preparation method and application thereof

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specific Embodiment approach 1

[0018] Specific embodiment one: the present embodiment 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode is made up of activated carbon modified by 2-ethylanthraquinone, expanded graphite, polytetrafluoroethylene and stainless steel mesh; the 2- The mass ratio of ethylanthraquinone modified activated carbon to expanded graphite is (2-8):1; the mass ratio of expanded graphite to polytetrafluoroethylene is 1:(6-18).

[0019] The 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode described in this embodiment is used as a cathode in practical application, and the size of the stainless steel mesh is determined according to actual needs, and is the same size as the matched anode.

[0020] In this embodiment, 2-ethylanthraquinone and expanded graphite are used to modify the activated carbon electrode. In the non-diaphragm system, when the mass ratio of 2-ethylanthraquinone / activated carbon to expanded graphite is 3:1, the electrode ha...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the described expanded graphite is prepared according to the following steps: first mix 50 mesh-80 mesh natural flake graphite and potassium permanganate evenly, and then The mixture of natural flake graphite and potassium permanganate is added to perchloric acid under constant temperature water bath and stirring conditions of 30°C to 40°C, and reacted for 30min to 50min under constant temperature water bath conditions of 30°C to 40°C, wherein the The mass ratio of natural flake graphite and potassium permanganate is 2:(0.5~1.5), and the mass ratio of described potassium permanganate and perchloric acid is 1:(7~9); after the reaction is completed, the solid reaction obtained The product is soaked in distilled water and washed until the pH value of the filtrate is neutral to obtain the washed expandable graphite, and then dried at 80°C to 100°C for 12 hours to obtain the dried ...

specific Embodiment approach 3

[0023]Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the activated carbon modified by 2-ethylanthraquinone is prepared according to the following steps: the activated carbon needs to be filtered through a 300-mesh sieve, and the retained sieve , get the sieved activated carbon, take the sieved activated carbon and soak it in the 2-ethylanthraquinone ethanol saturated solution for 8h~16h, get the activated carbon loaded with 2-ethylanthraquinone, and then wash it with absolute ethanol for 2~3 and then washed with distilled water for 3 to 5 times, after suction filtration, moved to a watch glass, put into an oven, and dried at a temperature of 80°C to 120°C for 2h to 3h to obtain 2-ethylanthraquinone modified Active carbon; the volume ratio of the mass of the sieved activated carbon to the saturated ethanol solution of 2-ethylanthraquinone is 1g: (50-150) mL. Others are the same as in the first or second embodiment. ...

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Abstract

The invention discloses a 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode, and a preparation method and an application thereof and relates to the composite electrode, and the preparation method and the application thereof. The invention aims at solving the problems that the electric conductivity of an oxygen reduction cathode for degrading wastewater containing organic pollutants is poor and the degradation efficiency of the organic pollutants is not high. The 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode disclosed by the invention comprises activated carbon modified by 2-ethylanthraquinone, expanded graphite, polytetrafluoroethylene and a stainless steel wire mesh. The preparation method comprises the following steps: 1) pretreatment of the stainless steel wire mesh; 2) paste mixing; 3) roller pressing; 4) pretreatment of the electrode; and 5) pre-electrolysis of the electrode. The application of the 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode is that the 2-ethylanthraquinone / activated carbon-expanded graphite composite electrode is used for degrading phenol and decoloring rhodamine B. Due to good electric conductivity of the expanded graphite mixed in the composite electrode, the electric conductivity of the electrode is improved, and the degradation efficiency against the pollutants is simultaneously high.

Description

technical field [0001] The invention relates to a composite electrode, its preparation method and application. Background technique [0002] With the rapid development of global industry, the problem of water pollution is becoming more and more serious, especially wastewater from chemicals, dyes, and pharmaceuticals is expensive and difficult to treat due to its high concentration, high toxicity, and refractory degradation. In recent years, the use of electrochemical methods to treat high-concentration organic wastewater has attracted much attention. Electrocatalytic Advanced Oxidation Technology (AEOP) can directly or indirectly generate free radicals through catalytically active electrode reactions at normal temperature and pressure, thereby effectively degrading organic pollutants that are difficult to biochemically treat, overcoming the need to add oxidants in advanced oxidation technology Defects. The use of oxygen at the cathode to reduce hydrogen peroxide and relate...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C02F101/34C02F101/38
Inventor 于秀娟王文美吴娟朱浩
Owner HEILONGJIANG UNIV
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