Preparation method of heterogeneous visible photocatalyst

A visible light and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve good degradation effect, stable particles, and novel design effects

Inactive Publication Date: 2013-06-26
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bottleneck restricting its application is that the generated photo-generated electrons and photo-generated holes are easy to recombine. If this problem is solved, it will be a great progress in photocatalysis research.

Method used

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  • Preparation method of heterogeneous visible photocatalyst

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Embodiment 1

[0029] (1) Preparation of Solution A

[0030] Add 5g of bismuth nitrate and 2.1g of citric acid into 100ml of nitric acid solution (2mol / L), stir until the solution is uniform and transparent, add dropwise a mixed solution of 1.2g of ammonium metavanadate and 1g of polyethylene glycol 2000 (PEG), and control The dropping rate was 3mL / min, and stirred at a speed of 300rpm for 2h to obtain solution A;

[0031] (2) Preparation of Suspension B

[0032] Adjust the pH of solution A to 8.5 with sodium hydroxide, raise the temperature to 90°C, and stir at a speed of 300rpm for 3h to obtain suspension B;

[0033] (3) Preparation of bismuth vanadate

[0034] Vacuum filter the suspension B, rinse the filter product with deionized water, dry at 70°C, and calcined at 500°C to obtain bismuth vanadate (BiVO 4 ) micronanoparticles;

[0035] (4) Preparation of Solution C

[0036] Will get BiVO 4 Add the particles into 100ml of silver nitrate solution with a concentration of 0.5g / L, sonic...

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Abstract

The invention relates to a preparation method of a heterogeneous visible photocatalyst. The preparation method comprises the following steps of: adding bismuth nitrate and a metal chelating agent into solution, dripping mixed solution of metavanadate and polyethylene glycol (PEG), stirring and obtaining solution A; adjusting the pH value of the solution A to be 7.5-10 by using an alkaline agent, stirring under the temperature of 90-100 DEG C to obtain suspension liquid B; carrying out suction filtering, cleaning, drying and calcination on the suspension liquid B to obtain micro-nano particles of bismuth vanadate BiVO4; adding the micro-nano particles of bismuth vanadate BiVO4 into silver nitrate solution, carrying out ultrasonic stirring to obtain solution C; and dripping sulfide into the solution C, carrying out stirring, suction filtering and calcination to obtain the heterogeneous visible photocatalyst. The heterogeneous visible photocatalyst has a good effect to organic pollutants, cannot cause secondary pollution and can be used for a long time.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method of a heterogeneous visible light catalyst. Background technique [0002] With the rapid development of society and economy and the rapid expansion of population, human's demand for energy has increased significantly, and global environmental problems have become increasingly prominent. Therefore, the utilization and development of solar energy is particularly important, and semiconductor photocatalysis technology, which is an important part of it, is expected to become an effective way to solve environmental and energy problems. The photo-splitting water technology that converts solar energy into clean hydrogen energy will completely solve the crisis caused by the depletion of fossil energy and the greenhouse effect, and photocatalytic degradation to eliminate toxic organic pollutants will become a cheap and feasible way to solve environmental pollution. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04
Inventor 何瑾馨王振华张韡刘保江王晓亮瞿建刚陈若阳
Owner DONGHUA UNIV
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