Three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application

A three-dimensional ordered, catalyst technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of uncontrollable products, uneven size, high temperature requirements, and achieve low price, Simple operation and efficient degradation effect

Inactive Publication Date: 2013-01-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature solid-phase method has the disadvantages of high temperature requirements, long reaction time, uncontrollable products, and uneven sizes.

Method used

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  • Three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application
  • Three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application
  • Three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 7ml of deionized water, 6ml of anhydrous methanol, and 3ml of ethylene glycol in a 50ml small beaker, respectively add 10mmol of indium nitrate, 10mmol of citric acid, and 10mmol of ammonium metavanadate under stirring conditions, stir magnetically for 1 hour until completely dissolved, and weigh Take 4g of PMMA template and impregnate in the above precursor solution for 3h, vacuum filter and dry at room temperature for 12h, raise from room temperature to 300°C at a rate of 1°C / min in a tube furnace under nitrogen atmosphere and keep at this temperature 3h, after the furnace temperature was cooled to room temperature, it was raised from room temperature to 500°C at a rate of 1°C / min in an air atmosphere and kept at this temperature for 4h to prepare InVO with a monoclinic three-dimensional ordered macroporous structure. 4 catalyst. The pore diameter is about 166nm, and the mesopore diameter of the pore wall is 2~10nm. Prepare 100ml of MB solution with a concent...

Embodiment 2

[0026] Measure 7ml of deionized water, 6ml of anhydrous methanol, and 3ml of ethylene glycol in a 50ml small beaker, add 10mmol of indium nitrate, 10mmol of tartaric acid, and 10mmol of ammonium metavanadate under stirring conditions, stir magnetically for 1 hour until completely dissolved, and weigh 4g of PMMA templates were immersed in the above precursor solution for 3h, dried at room temperature for 12h after vacuum filtration, raised from room temperature to 300°C at a rate of 1°C / min in a tube furnace under a nitrogen atmosphere and kept at this temperature for 3h , after the furnace temperature was cooled to room temperature, it was raised from room temperature to 500 °C at a rate of 1 °C / min in air atmosphere and kept at this temperature for 4 hours to prepare InVO with a monoclinic three-dimensional ordered macroporous structure. 4 catalyst. The pore diameter is about 142nm, and the mesopore diameter of the pore wall is 2~10nm. Prepare 100ml of MB solution with a con...

Embodiment 3

[0028] Measure 7ml of deionized water, 7.5ml of anhydrous methanol, and 1.5ml of ethylene glycol into a 50ml small beaker, add 10mmol of indium nitrate, 10mmol of ascorbic acid, and 10mmol of ammonium metavanadate under stirring conditions, and stir magnetically for 1 hour until completely dissolved. Weigh 4g PMMA template and immerse in the above precursor solution for 3h, vacuum filter and dry at room temperature for 12h, raise from room temperature to 300°C at a rate of 1°C / min in a tube furnace under a nitrogen atmosphere and at this temperature Keep for 3h, after the furnace temperature is cooled to room temperature, rise from room temperature to 500°C at a rate of 1°C / min in air atmosphere and keep at this temperature for 4h to prepare InVO with monoclinic three-dimensional ordered macroporous structure 4 catalyst. The pore diameter is about 138nm, and the mesopore diameter of the pore wall is 2~10nm. Prepare 100ml of MB solution with a concentration of 10mg / L in a quar...

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Abstract

A three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application belong to the technical field of photoresponsive catalysts. The preparation method comprises the following steps: under a stirring condition, dissolving indium nitrate, ammonium metavanadate and a complexing agent with an equal mol ratio in a mixed solution of water, anhydrous methanol, and glycol, uniformly stirring, weighing a PMMA template, soaking in a precursor solution, performing vacuum filtration and drying at room temperature, heating from room temperature to 300 DEG C with a speed of 1-2 DEG C / min in a tubular furnace in nitrogen atmosphere, holding the temperature for 3 hours, cooling the furnace to room temperature, heating from room temperature to 500 DEG C with a speed of 1-2 DEG C / min in air atmosphere, and holding the temperature for 4 hours. The indium vanadate photocatalyst with a three-dimensional ordered macroporous structure and mesopores on pore walls has degradation efficiency on methylene blue of up to 92-98% when irradiated by visible light for 1 hour. The preparation method of the invention is simple in operation, and low in raw material price.

Description

technical field [0001] The invention relates to a three-dimensional ordered macroporous material with visible light response, in particular to a photocatalytic material capable of efficiently degrading organic dyes such as methylene blue under visible light irradiation, its preparation and application, and belongs to the technical field of photoresponsive catalysts. Background technique [0002] InVO 4 Belongs to orthovanadate (MVO 4 ) A class of compounds with orthorhombic and monoclinic two crystal systems. Indium vanadate can be used as an anode material for rechargeable lithium-ion batteries due to its excellent electrochemical properties. In terms of clean energy, due to its visible light response characteristics, indium vanadate can not only photocatalytically degrade organic pollutants under visible light irradiation, but also photocatalytically decompose water to produce hydrogen, so it has attracted widespread attention from scholars in recent years. [0003] InV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/10C02F1/30C02F101/38
Inventor 戴洪兴王媛邓积光刘雨溪李欣尉赵振璇吉科猛
Owner BEIJING UNIV OF TECH
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