Method for degrading rhodamine B and indigo organic pollutant

A technology of organic pollutants and indigo, applied in the field of photocatalytic materials, can solve problems such as application limitations, and achieve the effects of simple synthesis method, good catalytic degradation effect, and low product cost

Inactive Publication Date: 2015-01-28
BOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses bispyridine piperazine and Anderson-type polyacids as raw materials. The complex synthesized under hydrothermal conditio

Method used

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  • Method for degrading rhodamine B and indigo organic pollutant
  • Method for degrading rhodamine B and indigo organic pollutant
  • Method for degrading rhodamine B and indigo organic pollutant

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0043] Example 1

[0044] 1.1. Preparation of degradation catalyst

[0045] 0.1mmol CuCl 2 ·2H 2 O, 0.10mmol N , N '-Bis(3-pyridinecarboxyl)-1,2-ethane, 0.10mmolNa 3 [CrMo 6 H 6 O 24 ]·8H 2 O (sodium chromomolybdate octahydrate) and 12.0 mL of deionized water were sequentially added to a 25 mL beaker, and stirred at room temperature for 30 minutes to obtain a suspension mixture. After adjusting the pH of the suspension mixture to 1.8 with 1.0 mol / L HCl solution, transfer to In a 25mL autoclave, heat up to 110°C at a heating rate of 15°C / h, keep the temperature constant for 48 hours under hydrothermal conditions, and then lower to room temperature at a cooling rate of 2.5°C / h to obtain dark green massive crystals. Rinse alternately with water and absolute ethanol twice, and dry naturally at room temperature to obtain the complex H{CuL 1 0.5 [CrMo 6 (OH) 6 O 18 ](H 2 O)}·0.5L 1 , Where L 1 for N , N '-Bis(3-pyridinecarboxyl)-1,2-ethane, the structural formula is: , The yield is 26%,...

Example Embodiment

[0049] Example 2

[0050] 1.1. Preparation of degradation catalyst

[0051] Add 0.40mmol CuCl 2 ·2H 2 O, 0.10mmol N , N '-Bis(3-pyridinecarboxyl)-1,2-ethane, 0.30mmol Na 3 [CrMo 6 H 6 O 24 ]·8H 2 O and 7.0 mL of deionized water were added to a 25 mL beaker in turn, stirred at room temperature for 10 min to obtain a suspension mixture. After adjusting the pH of the suspension mixture to 2.5 with 0.5 mol / L HCl solution, it was transferred to a 25 mL autoclave. Heat up to 130°C at a heating rate of 5°C / h, keep for 120h under hydrothermal conditions, and lower to room temperature at a cooling rate of 5°C / h to obtain dark green block crystals, which are washed alternately with deionized water and absolute ethanol 3 Second, let it dry naturally at room temperature to obtain the complex H{CuL 1 0.5 [CrMo 6 (OH) 6 O 18 ](H 2 O)}·0.5L 1 , Where L 1 for N , N '-Bis(3-pyridinecarbonyl)-1,2-ethane, the yield is 28%, and its PXRD diffraction pattern is as figure 1 As shown, the coordination en...

Example Embodiment

[0055] Example 3

[0056] 1.1. Preparation of degradation catalyst

[0057] Add 0.5mmol CuCl 2 ·2H 2 O, 0.10mmol N , N '-Bis(3-pyridinecarbonyl)-1,2-ethane, 0.24mmol Na 3 [CrMo 6 H 6 O 24 ]·8H 2 O and 11.0 mL of deionized water were added to a 25 mL beaker in turn, stirred at room temperature for 30 min to obtain a suspension mixture. After adjusting the pH of the suspension mixture to 2.1 with 1.0 mol / L HCl solution, it was transferred to a 25 mL autoclave. Raise the temperature to 120°C at a heating rate of 10°C / h, keep it for 96 hours under hydrothermal conditions, and lower to room temperature at a cooling rate of 10°C / h to obtain dark green block crystals, which are washed alternately with deionized water and absolute ethanol 2 Second, let it dry naturally at room temperature to obtain the complex H{CuL 1 0.5 [CrMo 6 (OH) 6 O 18 ](H 2 O)}·0.5L 1 , L 1 for N , N '-Bis(3-pyridinecarbonyl)-1,2-ethane, the yield is 34%, and its PXRD diffraction pattern is as figure 1 As shown, th...

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Abstract

The invention discloses a method for degrading rhodamine B and indigo organic pollutants. According to the method, copper chloride, octa chromium sodium molybdate and N,N'-bi(3-pyridine formyl) alkane is taken as a raw material, a hydrothermal synthesis method complex is adopted, hydrogen peroxide is added into a water body containing rhodamine B organic pollutants or indigo organic pollutants, the synthesized complex is added as a degradation catalyst, and the water body is radiated by ultraviolet light or visible light for catalytic degradation. The method has the advantages of simple process, low raw material cost, low energy consumption, high water-soluble pollutant affinity, good catalytic degradation effect and no secondary environment pollution.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a method for degrading rhodamine B and indigo organic pollutants. Background technique [0002] Rhodamine B and indigo are commonly used organic dyes in the printing and dyeing industry, and direct discharge of wastewater containing rhodamine B and indigo into the environment will bring serious pollution to the environment. Therefore, the catalytic degradation of rhodamine B and indigo, common pollutants in dye wastewater, is an effective way to treat printing and dyeing wastewater and purify the environment. TiO 2 And their metal dopants are the most commonly used degradation catalysts for these two organic dye molecules, which have the characteristics of low toxicity and corrosion resistance. However, the synthesis process of such materials requires multiple processes such as high-temperature roasting (400 ° C ~ 600 ° C) and grinding, and the pH of wastewater in the ca...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/32B01J31/34C02F101/30C02F103/30
CPCB01J31/34C02F1/30C02F1/32C02F2101/308C02F2103/30
Inventor 林宏艳王秀丽曾凌常之晗刘国成田爱香张巨文
Owner BOHAI UNIV
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