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Synthesis method of ball-flower shaped structure ZnO/ZnWO4 photocatalyst

A technology of photocatalyst and synthesis method, which is applied in the field of chemical industry to achieve the effect of uniform product, excellent hydrogen production performance and inhibition of recombination

Inactive Publication Date: 2017-10-03
QIQIHAR UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, ZnWO 4 The band gap is wide, and its light absorption is limited to the ultraviolet region, which accounts for a very small part of the solar spectrum

Method used

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  • Synthesis method of ball-flower shaped structure ZnO/ZnWO4 photocatalyst
  • Synthesis method of ball-flower shaped structure ZnO/ZnWO4 photocatalyst
  • Synthesis method of ball-flower shaped structure ZnO/ZnWO4 photocatalyst

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Embodiment Construction

[0015] Flower spherical structure ZnO / ZnWO 4 Composite photocatalyst, take by weighing 99.5% sodium tungstate (Na 2 WO 3 2H 2 O), the quality is 1.6494 g, purchased from Tianjin Dongli District Tianda Chemical Reagent Factory 99.0% zinc nitrate (Zn(NO 3 )·6H 2 O), with a mass of 1.4875 g. Mix the above two chemical reagent raw materials into 30 mL deionized water, stir for 10 min, add ammonia water (NH 3 ·H 2 O), with a volume of 15 ± 1 drop, fully stirred and poured into a 100 mL polytetrafluoroethylene-lined microwave reactor, set the microwave hydrothermal reaction temperature at 180 ± 2 °C, and the reaction time at 150 ± 3 min. After the microwave radiation reaction is finished, the generated white precipitate is repeatedly washed with deionized water and absolute ethanol for 4-5 times respectively. Put the precipitate into the drying box, set the drying temperature at 60±2°C, and the drying time is 12+0.1h, and take it out to get the final product flower spherical ...

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Abstract

The invention discloses a synthesis method of a ball-flower shaped structure ZnO / ZnWO4 photocatalyst, and belongs to the technical field of chemical industry. The method comprises the following steps: mixing and putting zinc nitrate (Zn(NO3).6H3O) and sodium tungstate (Na2WO3.2H3O) chemical reagent materials into deionized water, uniformly stirring the materials, performing microwave radiation reaction through a microwave reactor, repeatedly washing the materials through deionized water and absolute ethyl alcohol separately, and drying the materials, so as to obtain the final product ZnO / ZnWO4 composite photocatalyst. The surface appearance, photocatalytic activity and the property of photocatalytically splitting of water into hydrogen of the photocatalyst are determined, and the product performance is greatly enhanced in terms of degrading organic pollutant malachite green and photocatalysis of photocatalytically splitting of water into hydrogen. A microwave-assisted one-step synthesis method is adopted, and the synthesis method has the characteristics of short reaction time, uniform generated products and simple and practical production process, and samples and mass production performance are stable and reliable.

Description

technical field [0001] The invention relates to a flower ball structure ZnO / ZnWO 4 The invention relates to a synthesis method of a photocatalyst, belonging to the technical field of the chemical industry. Background technique [0002] One of the greatest technical challenges facing chemists and technologists in the century is the global energy supply and related environmental issues. The global energy consumption rate reached 15 TW in 2008 and is expected to nearly double by 2050. The energy we use is still limited and non-renewable fossil fuels, such as coal, oil and natural gas. However, the burning of these fossil fuels will cause a series of environmental problems. Solar energy is a free, abundant and infinitely renewable clean energy that can meet current and future human energy needs. Therefore, the conversion of solar energy into usable energy is highly desirable. At present, many semiconductor photocatalysts have been used for photolysis of water to produce hydr...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J35/02C02F1/32C01B3/04
CPCC01B3/042C02F1/32B01J23/30C01B2203/0277C01B2203/1088C01B2203/1076C02F2101/308C02F2305/10B01J35/40B01J35/39Y02E60/36
Inventor 李莉辛籽潺刘雁南安明泽黄继玮田宇
Owner QIQIHAR UNIVERSITY
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