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Ferrochrome vanadate photocatalytic material with visible light response as well as preparation method and application thereof

A photocatalytic material, iron vanadate technology, applied in the field of inorganic photocatalytic materials, can solve the problems of low photocatalytic activity and poor stability, and achieve the effects of environmental friendliness, easy industrial production, and simple preparation methods

Active Publication Date: 2014-12-03
SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to many research results, the modified photocatalyst has low photocatalytic activity and poor stability under sunlight irradiation.

Method used

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  • Ferrochrome vanadate photocatalytic material with visible light response as well as preparation method and application thereof
  • Ferrochrome vanadate photocatalytic material with visible light response as well as preparation method and application thereof
  • Ferrochrome vanadate photocatalytic material with visible light response as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: solid phase reaction method prepares CrFe(VO 4 ) 2 And its degradation experiment of methylene blue

[0048] Its preparation steps are as follows:

[0049] (1) According to the chemical formula CrFe(VO 4 ) 2 The stoichiometric ratio of the corresponding elements in the chromium oxide Cr was weighed respectively 2 o 3 : 0.95 g, iron oxide Fe 2 o 3 : 1.00 g, ammonium metavanadate NH 4 VO 3 : 2.925 g, ground in an agate mortar and mixed well to obtain a mixture;

[0050] (2) Take the mixture in the above step (1), select an air atmosphere for pre-calcination, the calcination temperature is 300 ° C, the calcination time is 15 hours, and naturally cool;

[0051] (3) Take out the sample, fully mix and grind the pre-calcined mixture again, put it in a muffle furnace, and calcinate it in an air atmosphere at a calcination temperature of 1000°C and a calcination time of 5 hours to obtain ferrochrome vanadium Salt CrFe(VO 4 ) 2 powder.

[0052] For the...

Embodiment 2

[0058] Embodiment 2: solid phase reaction method prepares CrFe(VO 4 ) 2 And its degradation experiment of methylene blue

[0059] Its preparation steps are as follows:

[0060] (1) According to the chemical formula CrFe(VO 4 ) 2 The stoichiometric ratio of the corresponding elements in the chromium hydroxide Cr(OH) was weighed respectively 3 : 1.29 g, iron oxide Fe 2 o 3 : 1.00 g, ammonium metavanadate NH 4 VO 3 : 2.925 g, ground in an agate mortar and mixed well to obtain a mixture;

[0061] (2) Take the mixture of the above step (1), select an air atmosphere for pre-calcination, the pre-calcination temperature is 500 ° C, the calcination time is 3 hours, and naturally cool;

[0062] (3) Take out the sample, fully grind the pre-calcined mixture again, put it in a muffle furnace, and carry out calcination under an air atmosphere. The calcination temperature is 500° C., and the calcination time is 20 hours to obtain chromium iron vanadate CrFe ( VO 4 ) 2 powder.

...

Embodiment 3

[0065] Embodiment 3: solid state reaction method prepares CrFe(VO 4 ) 2 And its degradation experiment of methylene blue

[0066] Its preparation steps are as follows:

[0067] (1) According to the chemical formula CrFe(VO 4 ) 2 Dosage ratio of corresponding chemical elements in , respectively weigh chromium sulfate Cr 2 (SO 4 ) 3 : 1.96 g, iron oxide Fe 2 o 3 : 0.80 g, ammonium metavanadate NH 4 VO 3: 2.34 g, ground in an agate mortar and mixed well to obtain a mixture;

[0068] (2) Take the mixture of the above step (1), select the air atmosphere for pre-calcination, the pre-calcination temperature is 350 ° C, the calcination time is 7 hours, and naturally cool;

[0069] (3) Take out the sample, place the pre-calcined raw material in the muffle furnace after fully grinding again, and carry out calcination under air atmosphere, the calcination temperature is 900 DEG C, and the calcination time is 13 hours, promptly obtains chromium iron vanadate CrFe ( VO 4 ) 2 ...

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Abstract

The invention discloses a ferrochrome vanadate photocatalytic material CrFe(VO4)2 with visible light response as well as a preparation method and an application thereof. The sample of a photocatalytic material is prepared by using a high-temperature solid-phase reaction method, a chemical solution method and a co-precipitation method; the production cost and device requirement are low; the prepared material is good in dispersion performance, uniform in granularity, good in chemical stability and optic stability; and the prepared photocatalyst sample CrFe(VO4)2 has relatively small spectrum width, excellent photocatalytic performance and good photocatalytic stability and good application prospect and has the effect of decomposing toxic chemical substances under visible light response.

Description

technical field [0001] The invention relates to a preparation method and application of a chromium ferrovanadate photocatalytic material with visible light response, in particular to a photocatalyst CrFe(VO) for degrading organic pollutants. 4 ) 2 The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the continuous growth of the world's population and the rapid development of industry, the problem of energy consumption has become an urgent problem to be solved. At present, the main sources of energy are still fuels such as oil, natural gas and coal. However, the massive consumption of fossil fuels will emit a large amount of toxic gases, and various environmental pollution problems related to it have also emerged one after another. Therefore, the development of sustainable energy technologies has been put on the agenda. Among all renewable energy technologies, including hydroelectric p...

Claims

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Application Information

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IPC IPC(8): B01J23/86C02F1/30C02F101/30C02F103/30
CPCY02W10/33Y02W10/37
Inventor 马忠谢洪德
Owner SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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