Method for preparing cellulose-based macroporous gel compound Cu2O visible-light-driven photocatalyst

A cellulose-based, cuprous oxide technology, used in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as unsatisfactory removal of organic pollutants , to achieve good application prospects, increase load fastness, and improve removal effect.

Active Publication Date: 2013-11-27
浙江枫翎新材料科技有限公司
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Problems solved by technology

[0006] In order to solve the problems in the background technology, the object of the present invention is to provide a preparation method of a cellulose-based macroporous gel composite cuprous oxide visible light catalyst, through the multi-active groups in its molecular structure to generalize different types of organic dye molecules Combining the suitable adsorptio

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  • Method for preparing cellulose-based macroporous gel compound Cu2O visible-light-driven photocatalyst
  • Method for preparing cellulose-based macroporous gel compound Cu2O visible-light-driven photocatalyst

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[0021] (1) Preparation of cellulose-based macroporous gel: Dissolve cellulose in a mixed solution containing 7wt% NaOH and 12wt% urea to obtain a transparent cellulose solution with a cellulose mass fraction of 3.3%; ammonium persulfate for 10 minutes, then sequentially add cross-linking agent N,N'-methylenebisacrylamide, acrylic acid and acrylamide monomer, polymerize at 0℃~-18℃ for 12 hours, the product is washed with water and extruded After granulation, freeze-dry to obtain -OH, -COOH, -NH 2 Cellulose-based macroporous gel with multiple active groups, the mass ratio of cellulose, ammonium persulfate, N,N'-methylenebisacrylamide, acrylic acid, and acrylamide in the cellulose-based macroporous gel is 1 :0.1:(0.03~0.05):(1~4):(0~4);

[0022] (2) Preparation of cellulose-based macroporous gel composite cuprous oxide visible light catalyst: immerse 0.1-0.5 g of cellulose-based macroporous gel obtained in step (1) into 30 mL of 0.1-1.0 mol / L containing Cu 2+ Add 30mL NaOH aqu...

Embodiment 1

[0029] (1) Preparation of cellulose-based macroporous gel: waste flax yarn was washed and dried, and then pulverized as cellulose raw material. 1 g of the above-mentioned cellulose was dissolved in 30 mL of a solution containing 7 wt% NaOH and 12 wt% urea to obtain a transparent cellulose solution with a cellulose mass fraction of 3.3%. Then add 0.1 g of initiator ammonium persulfate at room temperature for 10 min, then add 0.03 g of cross-linking agent N,N'-methylenebisacrylamide and 2 g of acrylic acid in sequence, polymerize at 0°C for 12 h, and the product is washed with water and extruded After granulation, freeze-dry to obtain a spherical cellulose-based macroporous gel with a pore size of 10 μm.

[0030] (2) Preparation of cellulose-based macroporous gel composite cuprous oxide photocatalyst: immerse 0.2 g of cellulose-based macroporous gel into 30 mL of CuSO with a concentration of 0.5 mol / L 4Add 30mL NaOH aqueous solution with a concentration of 2.0 mol / L, then add 4...

Embodiment 2

[0033] (1) Preparation of cellulose-based macroporous gel: Take 1 g of pulp pulp as the cellulose raw material, dissolve it in 30 mL of a solution containing 7 wt% NaOH and 12 wt% urea, and obtain a transparent gel with a mass fraction of 3.3% cellulose. Cellulose solution. Then 0.1 g of initiator ammonium persulfate was initiated at room temperature for 10 min, 0.05 g of cross-linking agent N,N'-methylenebisacrylamide, 4 g of acrylic acid and 1 g of acrylamide were added successively, and polymerized at -18 °C for 12 h. The product was washed with water and freeze-dried in a 24-well plate to obtain a columnar cellulose-based macroporous gel with a pore size of 200 μm.

[0034] (2) Preparation of cellulose-based macroporous gel composite cuprous oxide photocatalyst: 0.1 g of cellulose-based macroporous gel was immersed in 30 mL of Cu(Ac) with a concentration of 0.1 mol / L 2 Add 30 mL of NaOH aqueous solution with a concentration of 3.0 mol / L, then dropwise add 40 mL of glucose...

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Abstract

The invention discloses a method for preparing a cellulose-based macroporous gel compound Cu2O visible-light-driven photocatalyst. The method comprises the following steps: dissolving cellulose into a mixed solution of sodium hydroxide and urea, adding ammonium persulfate for initiation at ordinary temperature after obtaining a transparent cellulose solution, sequentially adding a cross-linking agent of N, N'-methylene-bisacrylamide, acrylic acid and an acrylamide monomer, polymerizing at low temperature, and freeze drying after water washing and extrusion pelletization to obtain cellulose-based macroporous gel; immersing into a copper-bearing water solution until adsorption equilibrium, adding a glucose solution after adding a sodium hydroxide water solution, filtering and taking out solid after water bath reaction, freeze drying after water washing to obtain the cellulose-based macroporous gel compound Cu2O visible-light-driven photocatalyst. The method is simple and stable in property, has high efficiency in removing dye and other organic pollutants, can be reused, and can be applied to treatment of waste water containing organic pollutants in the field of papermaking, dye printing, printing and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite catalyst, in particular to a preparation method of a cellulose-based macroporous gel composite cuprous oxide visible light catalyst. Background technique [0002] Water environmental pollution has become a major issue faced by countries all over the world to implement sustainable development, and organic pollutant wastewater such as dyes discharged by the textile printing and dyeing industry is one of the important sources of pollution. According to incomplete statistics, the total output of dyestuffs in the world is more than 700,000 tons, which are mainly consumed by the textile printing and dyeing industry. In the printing and dyeing process of textiles, about 10%-15% of dyes are directly discharged into natural water bodies. In these printing and dyeing wastewater, dyes have complex components, high chroma, and most of them are difficult to biodegrade. They also contain a variety of orga...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J35/10C02F1/30
Inventor 刘琳姚菊明江莉
Owner 浙江枫翎新材料科技有限公司
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