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Preparation method and application thereof for zinc ferrite/titanium dioxide nano compounded visible light photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the field of environmental pollution control, can solve the problem that the photocatalytic properties of photocatalysts have not been better applied, and achieve the effects of improving electron transfer efficiency, broadening the photoresponse range, and improving separation efficiency

Inactive Publication Date: 2010-02-24
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the photocatalytic properties of zinc ferrite / titanium dioxide nanocomposite visible light photocatalysts have not been better applied

Method used

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  • Preparation method and application thereof for zinc ferrite/titanium dioxide nano compounded visible light photocatalyst
  • Preparation method and application thereof for zinc ferrite/titanium dioxide nano compounded visible light photocatalyst
  • Preparation method and application thereof for zinc ferrite/titanium dioxide nano compounded visible light photocatalyst

Examples

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Embodiment 1

[0035] Cut the commercially pure titanium sheet into several titanium sheets with a size of 20mm×40mm. Grind repeatedly with 240#, 400#, 800# and 1500# emery paper until the surface is clean and smooth, then place it in an ultrasonic oscillation pool for ultrasonic cleaning, and then immerse in HF:HNO 3 :H 2 Etching in a mixed solution of O=1:4:5 for 40 seconds, and cleaning the last etched titanium sheet with ethanol solution and deionized water for 20 minutes respectively. The treated titanium sheets were left to dry naturally in the air. Connect the titanium sheet and the platinum sheet to the positive and negative poles of the DC stabilized power supply respectively. The electrolyte is composed of hydrofluoric acid, and the concentration of hydrofluoric acid in the electrolyte is 0.2wt%. On the DC stabilized power supply. In the constant current anodizing process, the anodic oxidation voltage and time are first oxidized at 0-20V for 5 minutes, then the voltage is stabil...

Embodiment 2

[0039] According to the preparation method of the present invention in Example 1, only the electrolytic solution was replaced with hydrofluoric acid with a concentration of 0.05 wt%, to obtain a zinc ferrite / titanium dioxide nanocomposite visible light photocatalyst.

Embodiment 3

[0041] According to the preparation method of the present invention in Example 1, only the electrolytic solution was replaced with hydrofluoric acid with a concentration of 1.0 wt%, to obtain a zinc ferrite / titanium dioxide nanocomposite visible light photocatalyst.

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Abstract

The invention discloses a preparation method and application for a zinc ferrite / titanium dioxide nano compounded visible light photocatalyst, which belong to the technical field of environment pollution treatment. The preparation method comprises the following steps: (1) generating electrochemical oxidation reaction under the action of 0.2 wt% hydrofluoric acid to prepare a titanium dioxide nano-tube electrode, wherein the caliber of the nano-tube is about 80nm and the tube length is 550nm; and (2) preparing a zinc ferrite / titanium dioxide nano O4 compounded visible light photocatalyst by a new electrodeposition process. The method synthesizes ZnFe2 to the inside of a nano-tube, thereby particle accumulation on the surface of the nano-tube is reduced and the electron transmission efficiency is further improved. In addition, the compounding of the zinc ferrite not only reduces the disadvantage that a photo-generated electron-cavity pair has high compound probability, but also widens thephotoresponse of the titanium dioxide nano-tube electrode, further improves the photocatalysis degradation efficiency of the zinc ferrite on organic pollutants in the visible light range and has highpractical value and application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a method for an inorganic narrow-bandgap semiconductor composite titanium dioxide nanotube electrode, in particular to a preparation method and application of a zinc ferrite / titanium dioxide nanocomposite visible light photocatalyst. Background technique [0002] Energy shortage and environmental pollution are common problems faced by all mankind in this century. How to rationally utilize the limited energy in nature, effectively control and solve the problem of environmental pollution is a hot topic studied by scientists from all over the world in the new century. In recent years, the semiconductor photocatalytic oxidation technology that has gradually emerged has provided us with an ideal method for rationally utilizing energy and controlling environmental pollution. It enables us to truly realize the use of inexhaustible and inexhaustible solar energy to...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J21/06B01J37/34A62D3/17C02F1/30C02F1/58C02F1/72A62D101/20A62D101/28A62D101/22C02F101/30C02F101/36C02F101/34
CPCY02W10/37
Inventor 李新勇侯阳肇启东陈国华
Owner DALIAN UNIV OF TECH
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