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Activated carbon fiber-loaded iron doped titanium dioxide photocatalyst and preparation method thereof

A technology of activated carbon fiber and titanium dioxide, which is applied in the field of photocatalyst and its preparation, can solve the problems of secondary pollution, secondary separation, and difficulty in obtaining rare earth elements, and achieves the effect of good reusability and strong ability.

Inactive Publication Date: 2009-09-23
SICHUAN AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Fe 3+ and Ho 3+ Doping to titania has been reported in the literature, but the Ho in this doping 3+ Rare earth elements are not easy to obtain, iron ions are separated from titanium dioxide, and there are problems of secondary separation and secondary pollution

Method used

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  • Activated carbon fiber-loaded iron doped titanium dioxide photocatalyst and preparation method thereof
  • Activated carbon fiber-loaded iron doped titanium dioxide photocatalyst and preparation method thereof
  • Activated carbon fiber-loaded iron doped titanium dioxide photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] In this example, the activated carbon fiber-supported iron-doped titanium dioxide photocatalyst was prepared by the sol method, and its degradation effect was verified.

[0059] Including the following steps:

[0060] a. Prepare a sol containing titanium and iron elements;

[0061] b. Pour the sol obtained in step a evenly on the modified and activated activated carbon fiber. After the adsorption is saturated, place it in an oven to dry at 80° C.; after drying, pour the sol to the activated carbon fiber until Adsorption is saturated, and then placed in an oven to dry at 80°C, and this is repeated three times to realize that the titanium-iron composite sol precursor is loaded on the activated carbon fiber;

[0062] c. Transfer the activated carbon fiber loaded with the titanium-iron composite sol precursor into a preheated and dewatered carbonization activation furnace, pass through nitrogen purge and slowly raise the temperature to 80°C to volatilize and remove ethanol...

Embodiment 2

[0087] In this example, the gel method was used to prepare the activated carbon fiber-supported iron-doped titanium dioxide photocatalyst, and its degradation effect was verified.

[0088] Including the following steps:

[0089] a. Prepare a sol containing titanium and iron elements;

[0090] b. the sol obtained in step a is coated on the activated carbon fiber by dipping method or spin coating method;

[0091] c. Then put it into an electric oven, adjust the temperature to 60°C, and age for 6 hours;

[0092] d. Take out the titanium-iron composite from the oven, put it into an electric constant temperature vacuum drying oven, adjust the temperature to 80°C and dry it to obtain a xerogel;

[0093] e. Grind the xerogel into powder, pour it into a porcelain ark, put it into a muffle furnace, adjust to the desired calcination temperature of 500°C, and calcine at a constant temperature for 2 hours to obtain a composite photocatalyst of activated carbon fiber loaded with iron-dop...

Embodiment 3

[0104] The preparation method of activated carbon fiber loaded iron-doped titanium dioxide photocatalyst is as in Example 1, wherein the mass percentage of iron element in step a2 is 0.07%, the calcination temperature under nitrogen purging in step c is 950 ° C, and the activated carbon fiber is polyacrylonitrile.

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Abstract

The invention relates to an activated carbon fiber-loaded iron doped titanium dioxide photocatalyst and a preparation method thereof, belonging to photocatalyst and the preparation method thereof. The invention aims at providing the titanium dioxide photocatalyst which is loaded on an activated carbon fiber and is directly combined with iron, and the photocatalyst enables the iron doped titanium and the activated carbon fiber to cooperate with each other to act and has stronger capability of degrading and decomposing organic contaminant and better reusability. The photocatalyst is prepared from the activated carbon fiber to which titania and iron are attached, wherein the content of the iron is 0.01 to 0.15 percent according to mass percent; the preparation method is as follows: preparing colloidal sol containing iron and titanium, attaching the colloidal sol to the activated carbon fiber, and calcinating the activated carbon fiber at the constant temperature ranging from 900 to 950 DEG C; or preparing the colloidal sol into gel, and obtaining the finished product by calcinating the gel. The invention can be used for degrading organic contaminant in wastewater.

Description

technical field [0001] The invention belongs to a photocatalyst and a preparation method thereof, in particular to a titanium dioxide photocatalyst used in wastewater treatment and a preparation method thereof. Background technique [0002] With the development of the economy, the environmental pollution is becoming more and more serious, especially the pollution of water resources has seriously threatened human health, which has aroused people's great attention. In terms of sewage treatment, the commonly used methods in the past mainly include: filtration method, sedimentation method, air flotation method, chemical coagulation method, etc., but these methods have low removal rate, limited purification effect, and have great selectivity for wastewater. Titanium dioxide (TiO 2 ) The emergence of photocatalytic oxidation technology overcomes the shortcomings of many traditional methods and has the following advantages: [0003] (1) A variety of organic pollutants contained i...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J31/06B01J21/18B01J21/06B01J37/08B01J37/00C02F1/30C02F1/72
CPCY02W10/37
Inventor 张延宗郑经堂邓仕槐曲降伟肖鸿李远伟孙百晔吴明铂彭宏陈珣邓成龙黄丽蓉杨晨
Owner SICHUAN AGRI UNIV
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