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Cellulose-based composite catalyst for catalyzing persulfate to degrade dye methyl orange and preparation method of cellulose-based composite catalyst

A composite catalyst, cellulose-based technology, applied in the field of composite materials, can solve the problems of reduced recycling and reuse activity, inconvenient recycling, easy decomposition of catalysts, etc., and achieves good reusability, wide application range and high mechanical strength. Effect

Inactive Publication Date: 2017-05-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the preparation and use of cellulose-supported metal catalysts, there may be common problems of polymer-supported metal catalysts such as easy decomposition of the catalyst, low mechanical strength, reduced recycling activity, and inconvenient recycling (Xue Fengjun, Wei Yuping. Cellulose-supported metal Progress in Catalyst Research. Polymer Bulletin, 2014, 10(5): 116-124)

Method used

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  • Cellulose-based composite catalyst for catalyzing persulfate to degrade dye methyl orange and preparation method of cellulose-based composite catalyst
  • Cellulose-based composite catalyst for catalyzing persulfate to degrade dye methyl orange and preparation method of cellulose-based composite catalyst
  • Cellulose-based composite catalyst for catalyzing persulfate to degrade dye methyl orange and preparation method of cellulose-based composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 200 mg of graphite oxide powder into n-hexanol (120 mL), and form a uniformly dispersed suspension by ultrasonication for 2 h, and dissolve 1 mmol of cobalt nitrate hexahydrate (calculated as 0.291 g based on a relative molecular mass of 291.03) in another In n-hexanol (80 mL), a red solution was formed, mixed with the suspension containing graphite oxide, and stirred at room temperature for 0.5 h to mix the two substances uniformly. The mixture was then heated at reflux at 140 °C for 12 h. After the reaction, the reaction system was cooled to room temperature, centrifuged and washed (centrifuge speed test adjustment), and repeatedly washed with ethanol to remove n-hexanol and impurities therein, and finally the obtained product was dried in a vacuum oven at 60°C for use.

[0031] Sodium hydroxide, urea, and deionized water were configured into 100 g of a mixed solution at a mass ratio of 7:12:79, and 2 g of oxidized cellulose was added to it after cooling at -10°C ...

Embodiment 2

[0034] Add 100mL of prepared 0.2m·mol / L methyl orange solution into five reactors, add 0.4m·mol, 1m·mol, 2m·mol, 4m·mol, 6m·mol, 10m·mol mol of PMS, then use 0.5mol / L of NaHCO 3 Buffer solution to adjust the pH value of the solution to 7, add 0.05 g of the cellulose-based composite catalyst prepared in Example 1 to each conical flask, and place the conical flask on a constant temperature water bath shaker to adjust the temperature to 25°C. Oscillate at a constant temperature at a certain rate, and start timing, sample 5mL at regular time intervals, mix with an equal volume of quencher methanol solution to terminate the reaction, and then filter. Finally, UV-7504 spectrophotometer was used to measure the corresponding absorbance of the solution at 486nm. Each experiment was repeated three times to obtain the average value. Reaction result (C / C 0 represents the current concentration compared to the initial concentration) such as figure 1 As shown, it shows that the amount of...

Embodiment 3

[0036] All add 100mL prepared 0.2m·mol / L methyl orange solution in four reactors, according to the result of embodiment 2, each Erlenmeyer flask is all added the PMS of 2m·mol, then use 0.5mol / L L NaHCO 3 Buffer solution Adjust the pH value of the solution to 7, add 0.05 g of the cellulose-based composite catalyst prepared in Example 1 to each conical flask, and place the conical flasks on a constant temperature water bath shaker to adjust the temperature to 15°C , 25°C, 40°C, 60°C, shake at a constant temperature at a certain rate, and start timing, take 5mL samples at regular intervals, mix with an equal volume of quencher methanol solution to terminate the reaction, and then filter. Finally, UV-7504 spectrophotometer was used to measure the corresponding absorbance of the solution at 486nm. Each experiment was repeated three times to obtain the average value. Reaction result (C / C 0 represents the current concentration compared to the initial concentration) such as figu...

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Abstract

The invention discloses a cellulose-based composite catalyst for catalyzing persulfate to degrade dye methyl orange and a preparation method of the cellulose-based composite catalyst. The preparation method comprises the following steps: firstly, cobalt (II,III) oxide is supported on graphite oxide, then the cellulose-based composite catalyst is prepared from the graphite oxide supporting the cobalt (II,III) oxide and oxidized cellulose by compositing, finally, PMS (potassium peroxymonosulfate) is added to water containing the methyl orange, pH is regulated, and the cellulose-based composite catalyst is added for degradation. The catalyst can be used at room temperature and has wide application range, a heterogeneous cobalt (II,III) oxide / graphite oxide / oxidized cellulose / PMS catalytic oxidation degradation system has the advantages of high catalytic efficiency, high oxidizing capacity, good reusability and the like, especially the mechanical strength of the catalyst is high, and the catalyst can be settled to wastewater bottom after reaction, is convenient to recover and can be applied to the field of sewage treatment, environmental governance and the like.

Description

technical field [0001] The invention relates to a composite material applied in the technical field of textile printing and dyeing wastewater treatment, in particular to a cellulose-based composite catalyst for catalyzing the degradation of dye methyl orange by persulfate and a preparation method thereof. Background technique [0002] Cellulose-based composite materials are materials that use cellulose as a matrix and add other functional components to improve its performance. So far, people have designed and synthesized many cellulose-supported metal catalysts, which have good catalytic activity and reusability, but there are still many problems. During the preparation and use of cellulose-supported metal catalysts, there may be common problems of polymer-supported metal catalysts such as easy decomposition of the catalyst, low mechanical strength, reduced recycling activity, and inconvenient recycling (Xue Fengjun, Wei Yuping. Cellulose-supported metal Progress in Catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C02F1/72C02F101/38
CPCB01J31/28B01J2231/70C02F1/725C02F2101/308C02F2101/38C02F2101/40
Inventor 李登新王君李洁冰薛飞阿斯弗·胡塞因李一鸣王贝贝曹晓霞孔祥乾阳光辉李玉龙
Owner DONGHUA UNIV
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