Novel electro-catalytic composite membrane material and preparation method thereof
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An electrocatalysis and composite membrane technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, membrane technology, etc., can solve the problems of high energy consumption, limit the application of electrochemical technology, and high processing costs, and achieve low energy consumption. , strong anti-pollution, high separation efficiency
Inactive Publication Date: 2009-10-21
DALIAN HUAXINYUAN TECHNOLOGY DEVELOPMENT LIMITED COMPANY
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However, when the above electrode materials are used to treat organic wastewater, they all have the problems of high energy consumption and high treatment cost, which limits the application of electrochemical technology in large-scale water treatment.
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Embodiment 1
[0027] In this embodiment, a carbon film with an average pore diameter of 0.4 microns is used as the substrate, and Pt / SiO 2 For the catalyst coating, the electrocatalytic composite carbon membrane was prepared by the sol-gel method.
[0028] (1) Pretreatment of the carbon membrane: place the carbon membrane in an ethanol solution and ultrasonically clean it for 30 minutes, and then wash it with 65% HNO 3 Pretreatment for 10 hours, washed with water, and dried in an oven at 120°C;
[0029] (2)Pt / SiO 2 Preparation of the sol: Mix ethyl orthosilicate, absolute ethanol, distilled water and acetylacetone uniformly according to a certain molar ratio, then add hydrochloric acid to adjust the pH to about 2, and then vigorously stir in a water bath at 40°C for 2 hours. Use a pipette to measure a certain concentration of water, catalyst, hydrolysis inhibitor, and then add H 2 PtCl 6 , Stir until completely dissolved, and slowly drop this solution into the above-mentioned Si-contain...
Embodiment 2
[0033] The original film material and pretreatment process used in this embodiment are the same as in Embodiment 1.
[0034] TiO 2 Preparation of sol: Prepare sol with butyl titanate, absolute ethanol, distilled water, nitric acid, and acetylacetone according to a certain molar ratio, stir vigorously for 2 hours, age at room temperature for 24 hours, and set aside.
[0035] Preparation of composite carbon membrane: Soak the carbon membrane substrate in TiO 2 In the sol, after standing for 30s, the substrate was pulled out of the sol at a pulling speed of 3mm / s, and dried at room temperature; then the carbon film was subjected to post-heat treatment: in the muffle furnace, 1 The heating rate of ℃ / min is raised to 100 ℃, and the temperature is kept for 0.5h, and then the temperature is raised to the predetermined heat treatment temperature of 400 ℃ at a heating rate of 5 ℃ / min. 2 Coated electrocatalytic composite carbon membrane.
[0036] Take the original carbon membrane of ...
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Abstract
The invention relates to a novel electro-catalytic composite membrane material and a preparation method thereof. The novel electro-catalytic composite membrane material is characterized in that the material can couple electro-catalytic technology and membrane separation technology. The preparation method comprises the following steps: taking a microporous separation membrane with electric conductivity, namely a carbon membrane, as a substrate, adopting a sol-gel method, mixing a metallic compound, water, a solvent, a catalyst, other additives and the like to be configured into a precursor solution, and obtaining an electro-catalytic composite membrane by sol ageing, film coating, drying and heat treatment; and preparing the composite membrane with superior performances by pretreating a substrate and controlling the mixture ratio of raw materials, the soakage time, the pulling speed, the sintering temperature and the like. The novel electro-catalytic composite membrane material takes the electro-catalytic composite membrane as an anode and a metallic material as a cathode to treat wastewater and realizes the reinforcement of the membrane separation process and the self-cleaning function under the action of a low-voltage electric field. The electro-catalytic membrane material has the advantages of low energy consumption, high separation efficiency, strong antifouling property and the like, and can be widely used for treating and recycling heavily polluted wastewater such as oily wastewater, dye wastewater, paper-making wastewater and the like. The preparation method has the advantages of simple preparation process, cheap equipment, easily-obtained raw materials, convenient operation and suitability for industrialized implementation.
Description
technical field [0001] The invention relates to an electrocatalytic coupling membrane separation technology, in particular to a novel electrocatalytic composite membrane for wastewater treatment and reuse and a preparation method thereof. The international patent main classification number is proposed to be Int.Cl.B01D71 / 02. Background technique [0002] At present, with the rapid development of China's industry, a large amount of industrial wastewater is discharged into the natural environment, making the pollution problem more and more serious. The shortage of water resources and water pollution are seriously affecting the survival of human beings and the development of social economy. The experience of countries in the world in dealing with water resource shortage and water pollution shows that wastewater treatment and reuse is one of the most effective ways to solve water resource pollution and shortage. Wastewater treatment and reuse technology is currently facing gre...
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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12C02F1/46C02F1/44
Inventor 李建新梁小平杨阳樊小伟余建国张永刚王同华
Owner DALIAN HUAXINYUAN TECHNOLOGY DEVELOPMENT LIMITED COMPANY
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