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Iron-doped cerium dioxide photocatalyst and preparation method thereof

A technology of ceria and photocatalyst, which is applied in the field of nanotechnology, can solve the problems of high cost, complicated preparation process, and low catalytic efficiency, and achieve the effect of simple production equipment, simple preparation process and good dispersion

Inactive Publication Date: 2015-07-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In summary, the current cerium oxide-based catalysts have high cost, complex preparation process, and low catalytic efficiency in the visible light region. The present invention is proposed to solve this problem
[0009] At present, there is no use of sodium carbonate as a precipitant to prepare iron-doped ceria photocatalysts by co-precipitation.

Method used

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  • Iron-doped cerium dioxide photocatalyst and preparation method thereof
  • Iron-doped cerium dioxide photocatalyst and preparation method thereof
  • Iron-doped cerium dioxide photocatalyst and preparation method thereof

Examples

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Embodiment 1

[0047] A non-iron-doped ceria photocatalyst whose molecular formula is CeO 2 .

[0048] The preparation method of above-mentioned a kind of iron-doped ceria photocatalyst, its preparation process specifically comprises the following steps:

[0049] (1) At room temperature, use deionized water to prepare an aqueous solution of cerium nitrate with a concentration of 0.1mol / L and an aqueous solution of sodium carbonate with a concentration of 0.5mol / L;

[0050] (2) Add 100ml of ferric nitrate aqueous solution with a concentration of 0.1mol / L dropwise to 60ml of an aqueous sodium carbonate solution with a temperature of 70°C and a concentration of 0.5mol / L at a rate of 2.5ml / min, and maintain the temperature during the dropwise addition The temperature is 70°C, and the rotation speed is 600rpm. After the dropwise addition, continue to control the temperature to 70°C, and the stirring speed is 600rpm to react for 30min, and the obtained reaction solution is naturally cooled to roo...

Embodiment 2

[0058] A kind of iron-doped ceria photocatalyst, its molecular formula is Fe x Ce 1-x o 2-0.5x , where X is 0.05.

[0059] The preparation method of above-mentioned a kind of iron-doped ceria photocatalyst, its preparation process specifically comprises the following steps:

[0060] (1) At room temperature, use deionized water to prepare an aqueous cerium nitrate solution with a concentration of 0.1mol / L, an aqueous solution of ferric nitrate with a concentration of 0.1mol / L, and an aqueous solution of sodium carbonate with a concentration of 0.5mol / L;

[0061] (2) Ultrasonically mix 5ml of ferric nitrate aqueous solution with a concentration of 0.1mol / L and 95ml of cerium nitrate aqueous solution with a concentration of 0.1mol / L to obtain a mixed aqueous solution of ferric nitrate and cerium nitrate. In the mixed aqueous solution of ferric nitrate and cerium nitrate, massage Calculation of mol ratio, that is, Ce:Fe is 0.95:0.05;

[0062] (3) Add the ferric nitrate and cer...

Embodiment 3

[0070] A kind of iron-doped ceria photocatalyst, its molecular formula is Fe x Ce 1-x o 2-0.5x , where X is 0.1.

[0071] The preparation method of above-mentioned a kind of iron-doped ceria photocatalyst specifically comprises the following steps:

[0072] (1) At room temperature, use deionized water to prepare an aqueous cerium nitrate solution with a concentration of 0.1mol / L, an aqueous solution of ferric nitrate with a concentration of 0.1mol / L, and an aqueous solution of sodium carbonate with a concentration of 0.5mol / L;

[0073] (2) Ultrasonically mix 90ml of ferric nitrate aqueous solution with a concentration of 0.1mol / L and 10ml of cerium nitrate aqueous solution with a concentration of 0.1mol / L to obtain a mixed aqueous solution of ferric nitrate and cerium nitrate. In the mixed aqueous solution of ferric nitrate and cerium nitrate, massage Calculation of mol ratio, that is, Ce:Fe is 0.9:0.1;

[0074] (3) Add the ferric nitrate and cerium nitrate mixed aqueous s...

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Abstract

The invention discloses an iron-doped cerium dioxide photocatalyst and a preparation method thereof, a molecular formula of the iron-doped cerium dioxide photocatalyst is FexCe1-xO2-0.5x, wherein X is 0.05-0.2. According to the preparation method, cerium nitrate, ferric nitrate and sodium carbonate are taken as initial raw materials, a coprecipitation method is employed to obtain flake-like FexCe1-xO2-0.5x, in the preparation process, x value is changed to obtain the FexCe1-xO2-0.5x with different composition. Doping of iron has obvious influence on CeO2 forbidden band width, the FexCe1-xO2-0.5x has good photocatalysis performance, the preparation method and the required equipment are simple, and industrial production can be easily realized.

Description

technical field [0001] The invention relates to an iron-doped ceria photocatalyst and a preparation method thereof. The material is widely used in the field of photocatalysis. The invention belongs to the field of nanotechnology. technical background [0002] CeO 2 Belongs to fluorite-type oxides, fluorite-type oxides due to CaF 2 And got its name. Because Ce has a unique f electron configuration, its compounds have special optical, electrical, and magnetic properties, and are known as a treasure house of new materials. CeO 2 It is a cheap and versatile material, widely used in luminescent materials, catalysts, polishing powders, electronic ceramics, ultraviolet absorbing materials, etc. CeO 2 As an N-type semiconductor, its light absorption threshold is about 420nm, which is higher than TiO, the most commonly used semiconductor material at present. 2 387nm. Visible, CeO 2 It has good light absorption ability. [0003] nano-CeO 2 The photocatalytic mechanism is t...

Claims

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Application Information

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IPC IPC(8): B01J23/83
Inventor 赵喆周浩郭强胜刘志福
Owner SHANGHAI INST OF TECH
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