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Composite catalyst for electro-Fenton degradation of dye wastewater as well as preparation method and application of composite catalyst
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A technology for composite catalyst and dye wastewater, which is applied in the field of composite catalyst preparation and can solve the problem of low catalytic activity
Pending Publication Date: 2020-09-11
CCCC FOURTH HARBOR ENG INST +3
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However, Fe 2 (MoO 4 ) 3 Nanostructures are prone to agglo
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Embodiment example 1
[0025] 1) Weigh 0.12g TiO 2 The powder was mixed with 5mL of isopropanol and ultrasonically dispersed for 15min, and then added dropwise to 50mL of deionized water to obtain TiO with a concentration of 0.03mol / L. 2 Dispersions;
[0026] 2) take by weighing 0.3g ammonium molybdate and 0.324g anhydrous ferric chloride respectively, respectively dissolve in 5mL deionized water and make ammonium molybdate solution and ferric chloride solution;
[0027] 3) Under ultrasonic dispersion conditions, ammonium molybdate solution was added dropwise to TiO 2 In the dispersion solution, adjust the pH value of the mixed solution to 4 with hydrochloric acid, and then ultrasonically mix for 2 hours;
[0028] 4) Under the condition of ultrasonic dispersion, add the ferric chloride solution dropwise to the above mixture and continue ultrasonic mixing for 0.5-1 hour, and then let it stand for 2 hours;
[0029] 5) Filter the precipitate, wash it with deionized water until neutral, place it in a...
Embodiment example 2
[0035] 1) Weigh 0.12g TiO 2 The powder was mixed with 5mL of isopropanol and ultrasonically dispersed for 15min, and then added dropwise to 50mL of deionized water to obtain TiO with a concentration of 0.03mol / L. 2 Dispersions;
[0036] 2) Take by weighing 0.15g ammonium molybdate and 0.124g anhydrous ferric chloride respectively, respectively dissolve in 5mL deionized water and make ammonium molybdate solution and ferric chloride solution;
[0037] 3) Under ultrasonic dispersion conditions, ammonium molybdate solution was added dropwise to TiO 2 In the dispersion solution, adjust the pH value of the mixed solution to 4 with hydrochloric acid, and then ultrasonically mix for 2 hours;
[0038] 4) Under the condition of ultrasonic dispersion, add the ferric chloride solution dropwise to the above mixture and continue ultrasonic mixing for 0.5-1 hour, and then let it stand for 2 hours;
[0039] 5) Filter the precipitate, wash it with deionized water until neutral, place it in ...
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Abstract
The invention provides a composite catalyst for electro-Fenton degradation of dye wastewater as well as a preparation method and application of the composite catalyst. The preparation method comprisesthe following steps: step 1, respectively preparing a TiO2 dispersion solution, a molybdate solution and a ferric salt solution; 2, under the ultrasonic dispersion condition, sequentially dropwise adding the molybdate solution and the ferric salt solution into the TiO2 dispersion solution to obtain a mixed solution, wherein the molar ratio of MoO4 < 2-> to TiO2 in the mixed solution is 3: (2-8),the molar ratio of MoO4 < 2-> to Fe < 3 + > in the mixed solution is 3: (2-4), reacting the mixed solution, settling, taking precipitate, filtering, calcining and cooling to prepare the composite catalyst. A two-electrode electro-Fenton system is formed by a Ti-IrO2 anode and a graphite felt cathode loaded with a composite catalyst, dye wastewater is used as an electrolyte, and external voltage isapplied to keep the current density of a cathode material at 180-200 mA/cm < 2 >, so that efficient degradation of the dye wastewater is realized.
Description
technical field [0001] The invention relates to the preparation of a catalyst, in particular to a preparation method and application of a composite catalyst used for electro-Fenton degradation of dye wastewater. Background technique [0002] With the acceleration of urbanization in my country, the urban water environment is facing greater challenges. The waste water and waste residue produced by chemical, pharmaceutical, printing and dyeing, petrochemical and other industries are constantly increasing, and the city's own water body capacity is small, which seriously threatens the ecological cycle of the water environment (Guo Wei, Wang Yu, Wang Hao, etc. The current situation of urban water pollution and Research status of water ecological restoration methods at home and abroad [J]. Water Science and Engineering Technology, 2010, 2010 (2): 57-59.). Especially heavily polluted dye wastewater is not only toxic and harmful, but also difficult to be effectively degraded by conv...
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