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Preparation method of zinc oxide/zinc titanite nucleocapsid nanowire composite photocatalyst and application thereof

A zinc oxide nanowire, core-shell nanotechnology, applied in the field of environmental pollution control, can solve the problem of harsh requirements, zinc oxide/zinc titanate nanowire composite photocatalyst photocatalytic properties have not been better developed, difficult to achieve, etc. problem, to achieve the effect of improving separation efficiency, widening the range of photoresponse, and simplifying the preparation process

Inactive Publication Date: 2010-01-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yang et al. (Yang, Y; Roland, S; Hong, J.F.ACS.NANO.2009, 3, 555-562) used atomic layer deposition to form titanium dioxide shells on the outside of zinc oxide nanowires, and formed zinc titanate nanowires by calcination , but the above two methods require more stringent conditions and are difficult to achieve
So far, no report on the synthesis of zinc titanate by sol-gel method has been found, and there are few studies on the application of zinc titanate in the field of photocatalysis. Catalytic properties have not been better developed

Method used

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  • Preparation method of zinc oxide/zinc titanite nucleocapsid nanowire composite photocatalyst and application thereof
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  • Preparation method of zinc oxide/zinc titanite nucleocapsid nanowire composite photocatalyst and application thereof

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Embodiment 1

[0026] Preparation of ZnO nanowire template: firstly, 0.58gZnSO 4 .7H 2 Dissolve 60ml of NaOH (0.5M) under O stirring, then add 10ml of hydrazine hydrate (N 2 h 4 .H 2 (0, 80%), then the solution was transferred to a 100ml polytetrafluoroethylene reactor, heated to 90°C, and maintained for 5h. Naturally cooled to room temperature, centrifuged at 8000 rpm for 5 min, washed with water and washed with alcohol three times each to obtain a white solid. Vacuum drying at 60°C for 12 hours to obtain a zinc oxide sample.

[0027] 2) Preparation of zinc oxide / titanium dioxide core-shell structure: using zinc oxide nanowires as a template, the zinc oxide / titanium dioxide core-shell structure was prepared by the sol-gel method. The specific method is as follows: disperse 20 mg of zinc oxide nanowires in 16 ml of n-butyl In alcohol, sonicate for 5 min to form a homogeneous suspension. After that, 20 mg CTAB and 0.5 ml deionized water were added and stirred for 45 min. Dissolve 0.05m...

Embodiment 2

[0030] According to the preparation method of the present invention in Example 1, only the addition of tetrabutyl titanate in the preparation step of the zinc oxide / titanium dioxide core-shell structure is changed to 0.1ml, and the zinc oxide / zinc titanate core-shell nanowire composite optical fiber is obtained. catalyst.

Embodiment 3

[0032] According to the preparation method of the present invention in Example 1, only the addition amount of tetrabutyl titanate in the preparation step of the zinc oxide / titanium dioxide core-shell structure is changed to 0.2ml, and the zinc oxide / zinc titanate core-shell nanowire composite optical fiber is obtained. catalyst.

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Abstract

The invention discloses a preparation method of a zinc oxide / zinc titanite nucleocapsid nanowire composite photocatalyst and application thereof, belonging to the technical field of environment pollution disposal. The preparation method of the catalyst comprises the following steps: 1) preparing a zinc oxide nanowire template by using a water heat process, wherein the diameter of the nanowire is about 200 nm, and the length of the nanowire is about a plurality of microns; 2) adopting a sol-gel wet chemical process to uniformly wrap a layer of titanium dioxide outside the zinc oxide nanowire template; and 3) sintering at a high temperature so as to generate solid phase reaction and then obtaining the zinc oxide / zinc titanite nucleocapsid nanowire. The method has the advantages of simple operation, room temperature implementing, stable performance, green synthesis process and the like. The composition of the zinc titanite not only expands the photoresponse scope of the zinc oxide nanowire and improves the separation efficiency of electron holes but also improves the photocatalyst degradation efficiency of organic pollutants, thereby having high practical value and great application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a method for compounding zinc oxide nanowires with a spinel phase compound zinc titanate, in particular to a method for compounding photocatalysts of zinc oxide / zinc titanate core-shell nanowires with photocatalytic activity Preparation method and its application. Background technique [0002] Zinc titanate has very important physical, electrical and optical properties, so it has attracted widespread attention. In industry, zinc titanate is often used as dye and desulfurizer. Generally, zinc oxide and titanium dioxide are used as raw materials, and zinc titanate is synthesized by high-energy ball milling method or high-temperature solid-state reaction method, but the above two methods cannot obtain one-dimensional nanostructures. ZnO nanowires are very easy to prepare and are usually used as templates to prepare one-dimensional tubular nanostructures of ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J21/06B01J37/08A62D3/176C02F1/32C02F1/58C02F1/72A62D101/28A62D101/20C02F101/34C02F101/30
Inventor 李新勇万利远肇启东陈国华
Owner DALIAN UNIV OF TECH
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