a photocatalyst la 2 (wo 4 ) 3 and its application

A photocatalyst and reaction technology, applied in photocatalyst La23 and its application field, can solve the problems of low photocatalytic efficiency and small photoresponse range of photocatalyst, and achieve the effects of increasing reaction area, good photocatalytic activity and easy operation.

Active Publication Date: 2022-02-22
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of photocatalyst La 2 (WO 4 ) 3 and its application to solve the problems of small photoresponse range and low photocatalytic efficiency of existing photocatalysts

Method used

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  • a photocatalyst la <sub>2</sub> (wo <sub>4</sub> ) <sub>3</sub> and its application
  • a photocatalyst la <sub>2</sub> (wo <sub>4</sub> ) <sub>3</sub> and its application
  • a photocatalyst la <sub>2</sub> (wo <sub>4</sub> ) <sub>3</sub> and its application

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Experimental program
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Effect test

Embodiment 1

[0032] 1) At 70°C, slowly add 0.25mol / L sodium tungstate solution to 0.6mol / L lanthanum chloride solution, so that the volume ratio of sodium tungstate solution to lanthanum chloride solution is 1.2: 1. Stir fully, and after 1.5 hours of reaction, a white colloidal precursor is obtained;

[0033] 2) Let the colloid precursor obtained in step 1) stand still and settle for 24 hours, then filter it with suction and wash it with distilled water three times to remove impurities, then put it in a drying oven, dry it at 105°C for 24 hours, grind it, and place it in Calcined at 700°C for 5h in a horse-boiling furnace to obtain a white powder which is the photocatalyst La 2 (WO 4 ) 3 .

Embodiment 2

[0035] 1) At 60°C, slowly add 0.50mol / L sodium tungstate solution to 0.9mol / L lanthanum chloride solution, so that the volume ratio of sodium tungstate solution to lanthanum chloride solution is 1.0: 1. Stir fully, and after 1.5 hours of reaction, a white colloidal precursor is obtained;

[0036] 2) Let the colloid precursor obtained in step 1) stand still and settle for 24 hours, then filter it with suction and wash it with distilled water three times to remove impurities, then put it in a drying oven, dry it at 105°C for 24 hours, grind it, and place it in Calcined at 600°C for 5 hours in a horse-boiling furnace to obtain a white powder which is the photocatalyst La 2 (WO 4 )3 .

Embodiment 3

[0038] 1) At 80°C, slowly add 0.70mol / L sodium tungstate solution to 1.0mol / L lanthanum chloride solution, so that the volume ratio of sodium tungstate solution to lanthanum chloride solution is 1.1: 1. Stir fully, and after 1.5 hours of reaction, a white colloidal precursor is obtained;

[0039] 2) Let the colloid precursor obtained in step 1) stand still and settle for 24 hours, then filter it with suction and wash it with distilled water three times to remove impurities, then put it in a drying oven, dry it at 105°C for 24 hours, grind it, and place it in Calcined at a temperature of 650°C for 6 hours in a horse-boiling furnace to obtain a white powder, which is the photocatalyst La 2 (WO 4 ) 3 .

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Abstract

The invention discloses a photocatalyst La 2 (WO 4 ) 3 The photocatalyst uses sodium tungstate and lanthanum chloride as raw materials, reacts in an aqueous solution to obtain a colloidal precursor, and then undergoes precipitation, washing, drying, grinding and roasting. The photocatalyst has a fluffy snowflake shape, with an average particle size of about 1-2.5 μm, which greatly increases its specific surface area, thereby increasing the contact area and reaction area with rosebic acid, and providing more surface active sites. It is beneficial to the degradation of rosebic acid and the absorption and utilization of light, and the photocatalyst La 2 (WO 4 ) 3 La in has 5d 1 6f 2 The electronic structure makes the photocatalyst absorb light in a wide range of wavelengths. Under the irradiation of ultraviolet light and visible light, it has good catalytic effect and photocatalytic activity on rosebic acid. Therefore, the present invention has great potential applications in the field of water pollution treatment .

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a photocatalyst La 2 (WO 4 ) 3 and its application. Background technique [0002] With the development of society, people's development and utilization of resources are increasing, which brings huge challenges to the natural environment, making environmental governance one of the severe problems that human beings need to solve urgently. In recent years, due to the widespread use of dyes, the pollutants in organic dye waste liquid have become the main wastewater pollutants. Among them, rosebic acid is an important dye and chemical indicator, which is irritating and toxic if inhaled, in contact with the skin or swallowed. It can be directly discharged into the ground through the sewer and then permeate into the groundwater source, which will have an irreversible impact on the underground drinking water and directly threaten the safety of drinking water for humans; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J35/02B01J35/10C02F1/30C01G41/00C02F101/34
CPCB01J35/004B01J23/30B01J35/1004B01J35/023C02F1/30C01G41/00C02F2305/10C02F2101/345C01P2002/82C01P2002/88C01P2004/03C01P2004/61
Inventor 于海莲张建川胡震
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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