A kind of preparation method of nife2o4/sno2 composite photocatalyst

A catalyst and composite light technology, applied in the field of nanotechnology, can solve problems such as poor shape and poor stability, and achieve the effects of simple production equipment, simple synthesis process, and short synthesis cycle

Inactive Publication Date: 2018-03-20
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a simple and effective NiFe 2 o 4 / SnO 2 Preparation method of composite photocatalyst, which prepares NiFe by one-step hydrothermal method 2 o 4 / SnO 2 , aims to solve the problems of poor stability and poor shape after loading, improve the photocatalytic efficiency of the product, and expand the application field of nanomaterials

Method used

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  • A kind of preparation method of nife2o4/sno2 composite photocatalyst
  • A kind of preparation method of nife2o4/sno2 composite photocatalyst
  • A kind of preparation method of nife2o4/sno2 composite photocatalyst

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Embodiment 1

[0028] (1) 0.14g of SnCl 4 ·5H 2 O and 0.48g NaOH were dissolved in 50ml deionized water, then 0.02gNiFe 2 o 4 Nano powder, NiFe 2 o 4 The concentration of the nanopowder is 0.002mol / L, and then mixed under stirring conditions;

[0029] The above-mentioned NiFe2O4 nanopowder and SnCl 4 ·5H 2 The consumption of O is calculated according to the ratio of 1:4 by the molar ratio of Ni:Sn;

[0030] The NiFe 2 o 4 Nano powder is NiFe 2 o 4 nano octahedron;

[0031] (2) Place the mixed material obtained after mixing in step (1) in a hydrothermal kettle, and control the temperature to 220° C. to react for 8 hours to obtain a reaction product;

[0032](3) After the reaction product is naturally cooled, it is centrifugally filtered, and the obtained product is washed 3-5 times with deionized water, then washed twice with absolute ethanol, and then dried at a temperature of 60°C for 12 hours to obtain the NiFe 2 o 4 SnO grows on the surface of nanopowder 2 Pale yellow nanop...

Embodiment 2

[0037] (1) 0.105g of SnCl 4 ·5H 2 O and 0.48g NaOH were dissolved in 70ml deionized water, then 0.03gNiFe 2 o 4 Nano powder, NiFe 2 o 4 The concentration of the nanopowder is 0.002mol / L, and then mixed under stirring conditions;

[0038] The above NiFe 2 o 4 Nanopowder and SnCl 4 ·5H 2 The consumption of O is calculated according to the ratio of 1:2 by the molar ratio of Ni:Sn;

[0039] The NiFe 2 o 4 Nano powder is NiFe 2 o 4 nano octahedron;

[0040] (2) Place the mixed material obtained after mixing in step (1) in a hydrothermal kettle, and control the temperature to 220° C. to react for 8 hours to obtain a reaction product;

[0041] (3) After the reaction product is naturally cooled, it is centrifugally filtered, and the obtained product is washed 3-5 times with deionized water, then washed twice with absolute ethanol, and then dried at a temperature of 60°C for 12 hours to obtain the NiFe 2 o 4 SnO grows on the surface of nanopowder 2 Pale yellow nanopowd...

Embodiment 3

[0043] (1) 0.14g of SnCl 4 ·5H 2 O and 0.48g NaOH were dissolved in 60ml deionized water, then 0.02NiFe 2 o 4 Nano powder, NiFe 2 o 4 The concentration of the nanopowder is 0.002mol / L, and then mixed under stirring conditions;

[0044] The above NiFe 2 o 4 Nanopowder and SnCl 4 ·5H 2 The consumption of O is calculated according to the ratio of 1:4 by the molar ratio of Ni:Sn;

[0045] The NiFe 2 o 4 Nano powder is NiFe 2 o 4 nano octahedron;

[0046] (2) Place the mixed material obtained in the step (1) into a hydrothermal kettle, and control the temperature to 200° C. to react for 3 hours to obtain a reaction product;

[0047] (3) After the reaction product is naturally cooled, it is centrifugally filtered, and the obtained product is washed 3-5 times with deionized water, then washed twice with absolute ethanol, and then dried at a temperature of 60°C for 12 hours to obtain the NiFe 2 o 4 SnO grows on the surface of nanopowder 2 Pale yellow nanopowder, namel...

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Abstract

The invention discloses a method for preparing a NiFe2O4 / SnO2 compound photocatalyst. Firstly, SnCl4.5H2O and NaOH are dissolved in deionized water; then, NiFe2O4 nano-powder is added, and the mixture is stirred evenly; lastly, an obtained reactant is put into a hydrothermal kettle for a hydrothermal reaction, after the reaction is finished, cooling, washing and stoving are conducted, and then NiFe2O4 / SnO2 compound photocatalyst nano-powder is obtained. According to the method, the surface of a NiFe2O4 octahedron is loaded with columnar SnO2, and NiFe2O4 / SnO2 in an obtained product is a pure phase. Compared with the degradation rate of singular NiFe2O4 to methylene blue, the degradation rate of the NiFe2O4 / SnO2 compound photocatalyst to methylene blue is increased by about 20%. The preparation technology is simple, needed equipment is simple, environmental friendliness is achieved, and industrial production is easily achieved. The method has the advantages that no secondary pollution is caused, and the product is easy to recycle. The NiFe2O4 / SnO2 compound photocatalyst is environmentally friendly.

Description

technical field [0001] The present invention relates to a kind of NiFe 2 o 4 / SnO 2 The invention relates to a preparation method of a composite photocatalyst, which belongs to the technical field of nanometer science and technology. Background technique [0002] As the basis of nanotechnology, the controllable synthesis of nanomaterials has always been one of the hot research fields in the scientific and technological circles. In the past ten years, people have made exciting research progress in the field of shape and size control of single-component nanomaterials, and realized the improvement and regulation of many physical and chemical properties of materials, making them in optoelectronics, It has gained important applications in fields such as catalysis, environment, energy, and life sciences. Osterloh, F.E. et al. (Chem.Soc.Rev.2013,42,2294-320) and Sophie Neveu. etc.) small 2015,11,No.22,2614–2618) pointed out that nano-NiFe 2 o 4 For the spinel anatase nano-oct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/835C02F1/30C02F101/38
CPCB01J23/002B01J23/835B01J35/0013B01J35/004B01J2523/00C02F2101/40C02F2305/10B01J2523/847B01J2523/842B01J2523/43
Inventor 程遥刘林炎刘志福赵喆
Owner SHANGHAI INST OF TECH
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