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Process for preparing iron-doped titanium dioxide powders

A preparation process and technology of titanium dioxide, which are applied in semiconductor/solid-state device manufacturing, photosensitive equipment, electric solid-state devices, etc., can solve the problems of unsuitable solar cell electrode materials, poor ability to capture sunlight, and low utilization rate of sunlight, so as to improve the Photoelectric conversion efficiency, slowing down the rate of hydrolysis, and extending the sensing range

Inactive Publication Date: 2012-07-18
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the restriction of the forbidden band width, the utilization rate of titanium dioxide to sunlight is relatively low.
TiO 2 Belonging to wide bandgap semiconductors, the ability to capture sunlight is poor. At present, dye-sensitized methods are mainly used to prepare photoelectrochemical solar cells with a wide spectral absorption range.
Titanium dioxide electrode materials have relatively high requirements for the selection of sensitizers, and the dependence on the selection of sensitizers is relatively large, which increases the production cost
The porous iron-doped titanium dioxide photocatalyst prepared by this method has high photocatalytic activity in the reaction of degrading organic pollutant molecules, but from the transmission electron microscope photos provided by the application, the obtained rod-shaped titanium dioxide has a diameter of about 250-500nm , the length is nearly 10 μm, the size is too large, not suitable for solar cell electrode materials

Method used

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  • Process for preparing iron-doped titanium dioxide powders
  • Process for preparing iron-doped titanium dioxide powders
  • Process for preparing iron-doped titanium dioxide powders

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Slowly drop 10ml of butyl titanate into a 50ml beaker filled with 10ml of absolute ethanol under stirring. After the dropwise addition, continue to drop 1ml of glacial acetic acid under stirring, and stir vigorously for 30 minutes to obtain a uniform and transparent solution A .

[0034] (2) Weigh 0.49g FeCl 3 ·6H 2 O, the molar ratio of Fe and Ti is 20:1, add 5ml of ethanol, dissolve at room temperature, and obtain FeCl-containing 3 solution B.

[0035] (3) At room temperature, solution B was slowly added dropwise to solution A, and was added dropwise with stirring to obtain uniform and transparent solution C.

[0036] (4) After stirring for 30 minutes, stop stirring, and leave the obtained solution C at room temperature for 2 days to obtain a yellow wet gel. After naturally standing at room temperature for 72 hours, put it into an oven with a set temperature of 110°C for drying .

[0037] (5) Grind the obtained xerogel into a powder with uniform particles, pl...

Embodiment 2

[0044] (1) Slowly drop 10ml of butyl titanate into a 50ml beaker filled with 10ml of absolute ethanol under stirring. After the dropwise addition, continue to drop 1.0ml of glacial acetic acid under stirring, and stir vigorously for 30 minutes to obtain a uniform and transparent solution. A;

[0045] (2) Weigh 0.98g FeCl 3 ·6H 2 O, the molar ratio of Fe and Ti is 10:1, add 5ml of ethanol, dissolve at room temperature, and obtain FeCl-containing 3 solution B.

[0046] (3) At room temperature, slowly add solution B dropwise to solution A, and add dropwise under stirring to obtain uniform and transparent solution C.

[0047] (4) After stirring for 15 minutes, stop stirring, and leave the obtained solution C at room temperature for 2 days to obtain a yellow wet gel. After naturally standing at room temperature for 72 hours, put it into an oven with a set temperature of 110°C for drying .

[0048] (5) Grind the obtained xerogel into a powder with uniform particles, place it in...

Embodiment 3

[0051] (1) Slowly drop 10ml of butyl titanate into a 50ml beaker filled with 10ml of absolute ethanol under stirring. After the dropwise addition, continue to drop 1ml of glacial acetic acid under stirring, and stir vigorously for 30 minutes to obtain a uniform and transparent solution A .

[0052] (2) Weigh 1.96g FeCl3·6H2O, the molar ratio of Fe and Ti is 5:1. Add 5ml of ethanol and dissolve at room temperature to obtain solution B containing FeCl3.

[0053] (3) At room temperature, slowly add solution B to solution A drop by drop while stirring, and all the drops are completed to obtain uniform and transparent solution C, and continue to stir.

[0054] (4) After stirring for 20 minutes, stop stirring, and leave the obtained solution C at room temperature for 2 days to obtain a yellow wet gel. After naturally standing at room temperature for 72 hours, put it into an oven with a set temperature of 110°C for drying .

[0055] (5) Grind the obtained xerogel into a powder wit...

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Abstract

The invention discloses a process for preparing iron-doped titanium dioxide powder materials through a sol-gel method. The process includes five reaction processes and has the advantages of having low raw material cost, mild reaction conditions, low energy consumptions and having no coarse particle aggregation members produced and the like. According to the process for preparing iron-doped titanium dioxide powder materials, the iron-doped titanium dioxide powder materials enable the sunlight induction range to be expanded and enable the sunlight absorption wavelength to perform a redshift and have a good prospect in manufacturing the electrodes of the solar battery.

Description

technical field [0001] The invention relates to a preparation process of iron-doped titanium dioxide powder. Background technique [0002] Titanium dioxide has become the most potential photocatalyst due to its good chemical stability, wear resistance, low cost, and non-toxicity. However, due to the restriction of the forbidden band width, the utilization rate of titanium dioxide to sunlight is relatively low. TiO 2 It belongs to wide bandgap semiconductor and has poor ability to capture sunlight. At present, the method of dye sensitization is mainly used to prepare photoelectrochemical solar cells with wide spectral absorption range. Titanium dioxide electrode materials have relatively high requirements for the selection of sensitizers, and the dependence on the selection of sensitizers is relatively large, which increases the production cost. In recent years, it has been continuously reported that an appropriate amount of transition metal doped Ti0 2 Defect positions c...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44
CPCY02E10/549
Inventor 张宪玺郭连顺曾庆华
Owner LIAOCHENG UNIV
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