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Preparation method of separating zinc oxide-based photocatalyst by magnetic control

A zinc oxide and catalyst technology, which is applied in the field of preparation of a zinc oxide-based photocatalyst that can be separated by magnetic control, can solve the problems of high production and use costs, cumbersome preparation processes, unstable performance and the like, and achieves low production and use costs, high preparation The effect of simple process and small operation difficulty

Active Publication Date: 2012-10-17
YANCHENG INST OF TECH
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Problems solved by technology

[0004] The invention provides a method for preparing a zinc oxide-based photocatalyst that can be separated by magnetic control, aiming to solve the problems of low activity, unstable performance, cumbersome preparation process and difficult operation of the photocatalyst prepared in the prior art. and high cost of use

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  • Preparation method of separating zinc oxide-based photocatalyst by magnetic control
  • Preparation method of separating zinc oxide-based photocatalyst by magnetic control
  • Preparation method of separating zinc oxide-based photocatalyst by magnetic control

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preparation example Construction

[0027] The preparation method comprises the following steps:

[0028] In step S101, a magnetic material is prepared;

[0029] In step S102, using the prepared magnetic material as a core to prepare a magnetic control separable core-shell photocatalyst.

[0030] Such as figure 2 As shown, in the embodiment of the present invention, the realization method of preparing the magnetic material is:

[0031] In step S201, 1 part of zinc nitrate hexahydrate or zinc acetate dihydrate or zinc sulfate heptahydrate and 2 parts of ferric nitrate nonahydrate or ferric chloride are dissolved in 100-200 mL of absolute ethanol, and stirred at room temperature for 0.5-12 hours , adjust the pH to 9-10 with NaOH solution;

[0032] In step S202, stir at room temperature for 0.5-12 hours, transfer to a polytetrafluoroethylene-lined hydrothermal kettle at 90-250°C for at least 5 hours;

[0033] In step S203, after naturally cooling to room temperature, they were separated with a magnet, washed w...

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Abstract

The invention discloses a preparation method of separating a zinc oxide-based photocatalyst by magnetic control, which comprises the following steps: preparing a magnetic material, then using the preparative magnetic material as a core to prepare the core-shell photocatalyst capable of separating by magnetic control. According to the invention, the photocatalyst enables easy separation and recovery through an external magnetic field, the method for the photocatalyst by magnetic control has the advantages of simple process and small operation difficulty, the prepared photocatalyst has the advantages of high activity, table performance and strong practicality, and possesses strong popularization and application value. Compared with a ZnO photocatalyst prepared by the same method, the catalytic activity of the photocatalyst of the invention is enhanced, the external magnetic field enables easy separation and recovery, and the preparation technology is simple. According to the composite photocatalysis material prepared by the magnetic material and ZnO, compared with simple ZnO, the photocatalysis effect is maintained after 3 times circular usage, and the practical usage cost can be substantially reduced on certain degree.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a preparation method of a zinc oxide-based photocatalyst capable of magnetic control separation. Background technique [0002] In 1970, two Japanese scientists first discovered the semiconductor TiO 2 Since it has photocatalytic activity, based on TiO 2 , ZnO and other semiconductors with wide bandgap and high exciton binding energy have been studied as photocatalysts. Although photocatalytic technology has been developed for decades, there are always bottlenecks restricting its industrial application. For example, the use of a single nano-photocatalyst has a series of shortcomings such as difficulty in dispersing, separation and recovery, and low photocatalytic activity. In terms of improving photocatalytic activity, researchers from various countries have done a lot of fruitful work, such as the doping of noble metal elements such as Au, Ag and non-me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80
Inventor 唐兰勤邵荣孙林
Owner YANCHENG INST OF TECH
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