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Photocatalyst, preparation method and application thereof

A photocatalyst, a technology for refining diatomite, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Broad prospects for development and the effect of preventing agglomeration

Inactive Publication Date: 2011-06-29
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] After searching, it can be seen that no report on the preparation of diatomite-supported nano-cuprous oxide and its photocatalytic degradation of colored polluted wastewater by hydrolysis of cuprous chloride was found.

Method used

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  • Photocatalyst, preparation method and application thereof
  • Photocatalyst, preparation method and application thereof
  • Photocatalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment

[0026] 1. Refining of diatomite: take 50g of diatomite and 500g of sulfuric acid solution (mass concentration 40%), fully stir and react in a water bath at 100°C for 4h, then add 250g of water to dilute and react for 1h, then filter the diatomite, Washed, dried, and calcined at 550°C for 5h in a muffle furnace. The resulting refined diatomaceous earth SiO 2 (see figure 1 ) with a mass fraction of 91.86%, the main impurity Al 2 o 3 1.72%, Fe 2 o 3 was 1.72%.

[0027] 2. Preparation of the catalyst: under ultrasonic frequency 40KHz radiation, add 1.0g CuCl and 0.5g sodium dodecylbenzenesulfonate to 100mL, 5.0mol / L NaCl solution and stir evenly, then add 1.0mol / L Na 3 PO 4 10mL of the solution and 1.5g of refined diatomaceous earth were obtained to obtain a yellow suspension, which was stirred for half an hour to make the nano-Cu 2 O was evenly attached to the surface of diatomaceous earth, and then the resulting solution was suction-filtered, and the obtained product wa...

Embodiment 2

[0032] Preparation method: under ultrasonic frequency 60KHz radiation, add 0.8g CuCl and 0.4g sodium dodecylbenzenesulfonate to 100mL, 4.8mol / L NaCl solution and stir evenly, then add 1.0mol / L NaCl 3 PO 4 Solution 8mL and 1.0g refined diatomaceous earth to obtain a yellow suspension; stir the yellow suspension for 1.0h to make the nano-Cu 2 O is evenly attached to the surface of diatomaceous earth, and then the resulting solution is suction filtered, then washed with distilled water for 4 times, and then washed once with 15mL acetone and 15mL ether, and the washed product is transferred to a rotary evaporator, and vacuum evaporated at 40°C. dry to obtain nano cuprous oxide / diatomaceous earth carrier photocatalyst.

[0033] The refined diatomite is to take sulfuric acid solution and diatomite at a liquid-solid mass ratio of 15:1, fully stir and react in a water bath at 100° C. for 3.5 hours, and wait for use; After adding the reactants obtained above to react for 2 hours, dia...

Embodiment 3

[0035] Preparation method: under ultrasonic frequency 50KHz radiation, add 1.2g CuCl and 0.6g sodium dodecylbenzenesulfonate to 100mL, 4.9mol / L NaCl solution and stir evenly, then add 1.0mol / L NaCl 3 PO 4 Solution 9mL and 2.0g refined diatomaceous earth to obtain a yellow suspension; stir the yellow suspension for 1.0h to make the nano-Cu 2 O is evenly attached to the surface of diatomaceous earth, and then the resulting solution is suction filtered, then washed with distilled water for 5 times, and then washed once with 25mL acetone and 25mL ether, and the washed product is transferred to a rotary evaporator and vacuum evaporated at 45°C. dry to obtain nano cuprous oxide / diatomaceous earth carrier photocatalyst.

[0036] The refined diatomaceous earth is to take sulfuric acid solution and diatomite at a liquid-solid mass ratio of 13:1, fully stir and react in a water bath at 100°C for 4.5h, and set aside for use; then press water to solid mass ratio of 18:1 After adding the...

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Abstract

The invention relates to an organic waste water decoloration treatment technology, in particular to a photocatalyst, a preparation method and application thereof. The grain size of the photocatalyst is 1 to 100 nanometers; nano cuprous oxide particles are attached to the surface of fine kieselguhr to form a nano cuprous oxide / kieselguhr carrier photocatalyst, wherein the weight ratio of cuprous oxide to kieselguhr is (0.58-0.87) to (1.0-2.0). By using the nano cuprous oxide / kieselguhr carrier photocatalyst, visible light or sunshine can be used as a light source for decoloration of organic colored waste water of pharmacy, papermaking or printing and dyeing industries. The production process is simple, industrialization is easy to realize, the problem of solid and liquid separation in the process of producing nano Cu2O by a hydrolysis method is solved, nanoparticles are effectively prevented from being agglomerated and the photocatalyst can be conveniently recycled and utilized.

Description

technical field [0001] The invention relates to an organic wastewater decolorization treatment technology, in particular to a photocatalyst and its preparation method and application. Background technique [0002] In recent years, semiconductor photocatalysis has become one of the research hotspots in the field of photochemistry and environmental protection. The principle is that semiconductors generate active free radicals under the action of light, and these free radicals can rapidly and non-selectively remove various organic pollutants completely. oxidation. Semiconductor photocatalysis technology has the advantages of being carried out under normal temperature and pressure, completely destroying organic matter, and having no secondary pollution. TiO 2 N-type semiconductors such as ZnO and ZnO have become widely used photocatalysts because of their high catalytic activity, strong oxidation ability, and good stability. However, for most n-type semiconductor photocatalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J21/16B01J37/00C02F1/30C02F103/28C02F103/30C02F103/34
CPCY02W10/37
Inventor 朱校斌苏营营王新亭
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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