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Method for synthesizing nickel-doped indium vanadate nanocrystalline photocatalyst by adopting microwave heating method and application thereof for water decomposition under visible light

A microwave heating and photocatalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor visible light activity, and achieve simple and convenient operation, Visible light activity enhancement effect

Inactive Publication Date: 2015-07-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, small-sized indium vanadate nanophotocatalysts with large specific surface areas tend to have poor visible-light activity due to the quantum size effect.

Method used

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  • Method for synthesizing nickel-doped indium vanadate nanocrystalline photocatalyst by adopting microwave heating method and application thereof for water decomposition under visible light
  • Method for synthesizing nickel-doped indium vanadate nanocrystalline photocatalyst by adopting microwave heating method and application thereof for water decomposition under visible light
  • Method for synthesizing nickel-doped indium vanadate nanocrystalline photocatalyst by adopting microwave heating method and application thereof for water decomposition under visible light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of precursor solution

[0033] Indium nitrate (In(NO 3 ) 3 . 4.5H 2 O) and nickel nitrate (Ni(NO 3 ) 2 . 6H 2 O) respectively prepared into 100mmol / L aqueous solution. After adding 10mL of indium nitrate solution and 0.1mL of nickel nitrate (Ni / In=1%) into 100mL of deionized water, add 0.117g (1mmol) of ammonium metavanadate solid into the above mixture under stirring, and dilute nitric acid to The pH value was adjusted to between 2-3 to form an orange-yellow suspension. Stirring was continued for 30 minutes until the suspension was stirred into a light yellow emulsion to obtain a microwave reaction precursor.

[0034] (2) Ni-InVO 4 Preparation of Nanocrystalline Photocatalyst

[0035]The microwave reaction precursor solution was transferred into a 250mL three-neck flask, placed in a microwave reactor (Beijing Xiangge brand), and heated by microwave at a constant temperature of 100°C for 5 hours with a power of 800W, and a constant stirring sp...

Embodiment 2

[0039] (1) Preparation of precursor solution

[0040] Indium nitrate (In(NO 3 ) 3 . 4.5H 2 O) and nickel nitrate (Ni(NO 3 ) 2 . 6H 2 O) respectively prepared into 100mmol / L aqueous solution. After adding 10mL of indium nitrate solution and 0.3mL of nickel nitrate (Ni / In=3%) into 100mL of deionized water, add 0.117g (1mmol) of ammonium metavanadate solid into the above mixture under stirring, and dilute nitric acid to The pH value was adjusted to between 2-3 to form an orange-yellow suspension. Stirring was continued for 30 minutes until the suspension was stirred into a light yellow emulsion to obtain a microwave reaction precursor.

[0041] (2) Ni-InVO 4 Preparation of Nanocrystalline Photocatalyst

[0042] The microwave reaction precursor solution was transferred into a 250mL three-neck flask, placed in a microwave reactor (Beijing Xiangge brand), and heated by microwave at a constant temperature of 100°C for 5 hours with a power of 800W, and a constant stirring ...

Embodiment 3

[0046] (1) Preparation of precursor solution

[0047] Indium nitrate (In(NO 3 ) 3 . 4.5H 2 O) and nickel nitrate (Ni(NO 3 ) 2 . 6H 2 O) respectively prepared into 100mmol / L aqueous solution. After adding 10mL of indium nitrate solution and 0.5mL of nickel nitrate (Ni / In=5%) into 100mL of deionized water, add 0.117g (1mmol) of ammonium metavanadate solid into the above mixture under stirring, and dilute nitric acid to The pH value was adjusted to between 2-3 to form an orange-yellow suspension. Stirring was continued for 30 minutes until the suspension was stirred into a light yellow emulsion to obtain a microwave reaction precursor.

[0048] (2) Ni-InVO 4 Preparation of Nanocrystalline Photocatalyst

[0049] The microwave reaction precursor solution was transferred into a 250mL three-neck flask, placed in a microwave reactor (Beijing Xiangge brand), and heated by microwave at a constant temperature of 100°C for 5 hours with a power of 800W, and a constant stirring ...

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Abstract

The invention belongs to the technical field of preparation of functional inorganic nanometer materials, and relates to a method for synthesizing a nickel-doped indium vanadate (Ni-InVO4) nanocrystal photocatalyst by a microwave heating method and its application in decomposing water under visible light. A method for synthesizing nickel-doped indium vanadate nanocrystalline photocatalysts by microwave heating, comprising preparing a precursor solution, then placing it in a microwave reactor for reaction, and centrifuging and washing and drying. The preparation of the precursor solution is to prepare a soluble The indium salt and the nickel salt are dissolved into aqueous solutions respectively, and the indium salt and nickel salt aqueous solutions are measured into deionized water, and the metavanadate solid particles are added under stirring, and the pH value is adjusted with dilute nitric acid and stirred until a pale yellow emulsion. The invention utilizes the microwave heating method to synthesize nickel-doped indium vanadate nanocrystalline photocatalyst, by changing the ratio of Ni / In in the precursor solution, the energy band of Ni-InVO4 nanocrystalline photocatalyst can be controlled and adjusted, and the prepared Ni- The visible light activity of InVO4 nanocrystals is greatly improved compared with undoped samples. The invention is simple and convenient to operate, and can be synthesized in one step.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional inorganic nanometer materials, and relates to the preparation of a photocatalyst, in particular to a method for synthesizing a nickel-doped indium vanadate nanocrystal photocatalyst by a microwave heating method and its application in decomposing water under visible light. Background technique [0002] Under the dual pressure of energy crisis and environmental problems, the development of new energy has become an urgent need for sustainable development of mankind. Due to its high combustion value and non-polluting characteristics, hydrogen energy has become the most likely new energy source to replace fossil fuels in the 21st century. The photocatalytic water splitting hydrogen production technology can effectively avoid the disadvantages of high energy consumption and heavy pollution of the traditional industrial methods of cracking fossil energy hydrogen production and electrol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847C01B3/04
CPCY02E60/36
Inventor 闫研施伟东范伟强延旭严铭胡泊刘馨琳
Owner JIANGSU UNIV