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Preparation method and application of cuprous-oxide-loaded-on-foam-nickel composite graphene oxide photocatalyst

A cuprous oxide, composite oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve secondary pollution, long reaction time, preparation procedures Complicated and other problems, to achieve the effect of good recycling and easy operation

Active Publication Date: 2017-12-01
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

Cu prepared by this method 2 O / rGO composites can improve the separation efficiency of photogenerated electrons and holes, and show good photocatalytic performance, but the preparation procedure is complicated and the reaction time is long
These visible photocatalysts are all powdery solids. Although they have a high degradation rate for organic pollutants in wastewater, they cannot be settled due to floating during the degradation process, making it difficult to recycle and reuse, which brings secondary pollution and increases the number of catalysts. The cost of separation from waste water limits its industrial application

Method used

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  • Preparation method and application of cuprous-oxide-loaded-on-foam-nickel composite graphene oxide photocatalyst
  • Preparation method and application of cuprous-oxide-loaded-on-foam-nickel composite graphene oxide photocatalyst
  • Preparation method and application of cuprous-oxide-loaded-on-foam-nickel composite graphene oxide photocatalyst

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preparation example Construction

[0027] The preparation method of the present invention comprises the following steps:

[0028] 1) Graphene oxide was prepared by the Hummer method, and a graphene oxide dispersion system of 2 mg / mL-4 mg / mL was obtained by ultrasonication;

[0029] 2) Soak the three-dimensional nickel foam (NF) in acetone for 1 hour, then treat it with 1mol / L hydrochloric acid for 10 minutes, and then wash it with ultrasonic water. After 5 min in the ene dispersion system, take it out and dry it in the air to get the GO@NF composite material;

[0030]3) With graphene oxide@foam nickel (GO@NF) as working electrode, platinum electrode as auxiliary electrode, calomel electrode as reference electrode, 0.1M CH 3 COONa and 0.02M CuSO 4 The mixed solution is the supporting electrolyte, and its pH is 6.0-7.0. After 1h-2h of constant potential deposition, a three-dimensional NF-loaded Cu 2 O / GO composite photocatalyst, wherein the constant potential voltage is -0.2V~-0.3V.

[0031] A preparation met...

Embodiment 1

[0033] (1) Graphene oxide was prepared by the Hummer method, and a graphene oxide dispersion system of 4 mg / mL was obtained by ultrasonication.

[0034] (2) Soak the nickel foam in acetone for 1 hour, then treat it with 1mol / L hydrochloric acid for 10 minutes, and then wash it with ultrasonic water. After immersing the pretreated NF size (1 × 5 cm) in 4 mg / mL graphene oxide dispersion system for 5 min, it was taken out and air-dried to obtain GO@NF composites.

[0035] (3) With GO@NF as working electrode, platinum electrode as auxiliary electrode, and calomel electrode as reference electrode, 0.1MCH 3 COONa and 0.02M CuSO 4 The mixed solution is the supporting electrolyte, pH = 6.0, and three-dimensional NF-loaded Cu is obtained after potentiostatic deposition at -0.2V for 1 h 2 O / GO composite photocatalyst.

[0036] The prepared Cu 2 O / GO@NF composite size (1×5cm), placed in oilfield wastewater containing 92mg / L HPAM, added 20mmol / L H 2 o 2 , magnetic sub-stirring, afte...

Embodiment 2

[0038] (1) Graphene oxide was prepared by the Hummer method, and a 2 mg / mL graphene oxide dispersion was obtained by ultrasonication.

[0039] (2) Soak the nickel foam in acetone for 1 hour, then treat it with 1mol / L hydrochloric acid for 10 minutes, and then wash it with ultrasonic water. After soaking the pretreated NF (1 × 5 cm) in 2 mg / mL graphene oxide dispersion system for 5 min, it was taken out and air-dried to obtain GO@NF composites.

[0040] (3) With GO@NF as working electrode, platinum electrode as auxiliary electrode, and calomel electrode as reference electrode, 0.1MCH 3 COONa and 0.02M CuSO 4 The mixed solution is the supporting electrolyte, pH = 6.5, and three-dimensional NF-loaded Cu is obtained after potentiostatic deposition at -0.25V for 2 hours 2 O / GO composite photocatalyst.

[0041] (4) the prepared Cu 2 O / GO@NF composite material size (1×5cm), placed in oilfield wastewater containing 94mg / L HPAM, added 15mmol / L H 2 o 2 , magnetic sub-stirring, aft...

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Abstract

The invention discloses a preparation method and application of a cuprous-oxide-loaded-on-foam-nickel composite graphene oxide photocatalyst. The preparation method comprises the following steps: preparing oxide graphene, and performing ultrasonic treatment to obtain a graphene oxide dispersion system; soaking three-dimensional foam nickel with acetone for 1h, then treating the three-dimensional foam nickel with 1mol / L hydrochloric acid for 10min, ultrasonically washing the three-dimensional foam nickel, soaking the ultrasonically-washed three-dimensional foam nickel into the graphene oxide dispersion system obtained in step 1) for 4-6min, and taking out and airing the three-dimensional foam nickel to obtain a graphene oxide@foam nickel composite material; performing potentiostatic deposition by taking the graphene oxide@foam nickel composite material as a working electrode, a platinum electrode as an auxiliary electrode, a calomel electrode as a reference electrode and a mixed solution of 0.1M CH3COONa and 0.02M CuSO4 as a supporting electrolyte to obtain a cuprous-oxide-loaded-on-three-dimensional-foam-nickel composite graphene oxide photocatalyst. The preparation method has the characteristics of simple process, mild reaction condition, short reaction time and recyclability.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a preparation method and application of a foamed nickel-supported cuprous oxide composite graphene oxide photocatalyst. Background technique [0002] With the sharp increase in the demand for petrochemical energy, polymer flooding has been widely used in tertiary oil recovery. The wide application of polymer flooding has not only created huge economic benefits, but also caused serious environmental crises. Polymer flooding wastewater not only has high oil content, but also contains a large amount of polymers. The presence of polymers not only increases the difficulty of sewage treatment, but also causes wear and tear in plumbing equipment and even causes water poisoning. At present, the degradation methods of HPAM mainly include photocatalytic degradation, mechanical degradation, thermal degradation, biodegradation, etc., but most processes have poor degradat...

Claims

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Application Information

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IPC IPC(8): B01J23/755C02F1/30C02F1/72C02F101/38C02F103/10
CPCC02F1/30C02F1/722C02F1/725B01J23/755C02F2101/38C02F2103/10B01J35/39
Inventor 孟祖超李成希
Owner XI'AN PETROLEUM UNIVERSITY
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