Sea urchin-shaped modified nanometer ZnO photocatalyst as well as preparation method and application of photocatalyst

A photocatalyst, sea urchin-like technology, applied in the field of materials, can solve problems such as poor photocatalytic degradation ability of Rhodamine B, and achieve the effects of economical and feasible raw materials, simple operation of process methods, and shortened time.

Active Publication Date: 2015-05-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ability of sea urchin-like ZnO to treat organic pollutants in dye wastewater needs to be improved, for example, its ability to photocatalytically degrade rhodamine B under the action of visible light is poor

Method used

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  • Sea urchin-shaped modified nanometer ZnO photocatalyst as well as preparation method and application of photocatalyst
  • Sea urchin-shaped modified nanometer ZnO photocatalyst as well as preparation method and application of photocatalyst
  • Sea urchin-shaped modified nanometer ZnO photocatalyst as well as preparation method and application of photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Solution A: Measure 25 mL of zinc nitrate aqueous solution with a concentration of 0.6 mol / L, add 0.80 mmol of ferric nitrate nonahydrate to the above zinc nitrate aqueous solution, then add 230 mmol of sodium hydroxide, stir mechanically for 0.5 h, the solution becomes clear, and set aside.

[0029] Solution B: prepare a sodium lauryl sulfate solution with a concentration of 0.035mol / L, the solvent is a mixture of absolute ethanol and water, the volume ratio of alcohol to water (i.e. absolute ethanol:water) is 8:1, and the mechanical stirring is 0.5 h, stir well and set aside.

[0030] Measure 280mL of solution B and place it in a 500mL beaker. Under the action of mechanical stirring, slowly add solution A to the beaker dropwise for 20min, then mechanically stir for 2h, and then sonicate for 1h (200W). After the ultrasonication was completed, the liquid in the beaker was transferred to a 500mL three-neck flask with a stirring and condenser tube, and condensed and reflu...

Embodiment 2

[0032] Solution A: Measure 25 mL of zinc nitrate aqueous solution with a concentration of 0.55 mol / L, add 0.75 mmol of ferric nitrate nonahydrate to the above zinc nitrate aqueous solution, then add 250 mmol of sodium hydroxide, stir mechanically for 1 hour, the solution becomes clear, and set aside.

[0033]Solution B: Prepare a sodium lauryl sulfate solution with a concentration of 0.030mol / L. The solvent is a mixture of absolute ethanol and water. The volume ratio of alcohol to water is 6:1. Stir mechanically for 1 hour, stir evenly and set aside.

[0034] Measure 320mL of solution B into a 500mL beaker, slowly add solution A to the beaker dropwise under the action of mechanical stirring for 30min, then mechanically stir for 1h, and then sonicate for 0.5h (200W). After the ultrasonication was completed, the liquid in the beaker was transferred to a 500mL three-necked flask with a stirring and condenser tube, and condensed and refluxed in a water bath at 80°C for 3h. After t...

Embodiment 3

[0036] Solution A: Measure 25 mL of zinc nitrate aqueous solution with a concentration of 0.53 mol / L, add 0.65 mmol of ferric nitrate nonahydrate to the above zinc nitrate aqueous solution, then add 240 mmol of sodium hydroxide, stir mechanically for 0.5 h, the solution becomes clear, and set aside.

[0037] Solution B: prepare a sodium lauryl sulfate solution with a concentration of 0.028mol / L, the solvent is a mixture of absolute ethanol and water, the volume ratio of alcohol to water is 4:1, stir mechanically for 1 hour, stir well and set aside.

[0038] Take 290mL of solution B and place it in a 500mL beaker. Under the action of mechanical stirring, slowly add solution A to the beaker dropwise for 28min, then mechanically stir for 1h, and then sonicate for 0.5h (200W). After the ultrasonication was completed, the liquid in the beaker was transferred to a 500mL three-necked flask with a stirring and condenser tube, and condensed and refluxed in a water bath at 83°C for 3h. ...

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Abstract

The invention provides a sea urchin-shaped modified nanometer ZnO photocatalyst as well as a preparation method and application of photocatalyst. Sodium hydroxide is used as a system pH modifier, zinc nitrate hexahydrate is used as a zinc source, sodium dodecyl sulfate is used as a morphology revulsant, ferric nitrate nonahydrate is used as a modified adjuvant, mixed liquor of ethyl alcohol and water is used as solvent, and steps of mechanically stirring, carrying out ultrasound, condensing for backflow, centrifuging, drying and the like are implemented to prepare the sea urchin-shaped modified nanometer ZnO photocatalyst. The preparation method has the advantages of stable preparation system, simple operation of process method, cheap raw materials, economical feasibility and the like. The photocatalytic degradation efficiency to Rhodamine B by the prepared sea urchin-shaped modified nanometer ZnO photocatalyst under action of visible light with illumination for 160min is 88.39%.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to waste water treatment materials, in particular to a sea urchin-shaped modified nano ZnO photocatalyst, a preparation method thereof and an application in dye waste water treatment. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious, and the control and prevention of environmental pollution has become the focus of scientific research today. As one of the main pollution sources of water bodies, dye wastewater has the characteristics of high COD concentration, many refractory organic substances, and poor biodegradability. In addition, dye wastewater contains more chromium, manganese, cadmium, cobalt, nickel, lead, copper, etc. heavy metal ion. In the treatment of dye wastewater, semiconductor photocatalytic technology has high treatment efficiency, no secondary pollution, simple operation, and low treatment cost. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C02F1/30
Inventor 刘俊莉惠爱平马建中
Owner SHAANXI UNIV OF SCI & TECH
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