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Preparation method for zinc titanate photocatalytic material with special morphology

A photocatalytic material, zinc titanate technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, titanium compounds, etc., can solve problems such as unsuitable production efficiency, expensive raw materials, and long preparation time , to shorten the production cycle, improve dispersion, and improve production efficiency.

Active Publication Date: 2017-08-29
HARBIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of high raw material price, complex process, long preparation time and unsuitable production efficiency in the existing preparation method of zinc titanate photocatalytic material, and to provide a special appearance titanium Preparation method of acid zinc photocatalytic material

Method used

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  • Preparation method for zinc titanate photocatalytic material with special morphology
  • Preparation method for zinc titanate photocatalytic material with special morphology
  • Preparation method for zinc titanate photocatalytic material with special morphology

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specific Embodiment approach 1

[0031] Specific embodiment one: the preparation method of the zinc titanate photocatalytic material with special morphology in this embodiment is carried out according to the following steps:

[0032] 1. Weigh polyvinylpyrrolidone (PVP), zinc nitrate hexahydrate and tetrabutyl titanate according to the ratio of surfactant, Zn element and Ti element substance ratio of 1:40:40, and prepare 0.0005mol respectively at room temperature / L, 0.05 mol / L and 0.05 mol / L ethylene glycol solutions, and slowly mix zinc nitrate hexahydrate and tetrabutyl titanate solutions evenly to obtain a mixed solution;

[0033] 2. Using polyvinylpyrrolidone (PVP) solution as the mother liquor, slowly drop the mixed solution and 25 wt% concentrated ammonia solution into the mother liquor at the same time, and stir vigorously to control the acid-base of the reaction system to be neutral (pH≈7) , to generate zinc titanate precursor Zn(OH) 2 / TiO(OH) 2 the suspension;

[0034] 3. Centrifuge the suspensio...

specific Embodiment approach 2

[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the zinc source, titanium source and solvent described in step one are ZnSO 4 、TiOSO 4 and distilled water, the basic equation of precursor precipitation is shown in formula (5), and the solvent used for the corresponding precursor washing should also be distilled water, and the others are the same as in Embodiment 1.

[0046] TiOSO 4 +ZnSO 4 +NH 3 ·H 2 O→Zn(OH) 2 ↓+TiO(OH) 2 ↓+2(NH 4 ) 2 SO 4 (5)

specific Embodiment approach 3

[0047] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the surfactant and precipitating agent described in step one are PEG400 and Na 2 CO 3 , the others are the same as in the second embodiment.

[0048] The beneficial effects of this embodiment are: the cubic phase ZnTiO synthesized by this embodiment 3 The material has uniform morphology and uniform size, and the use of PEG400 can effectively control the ZnTiO 3 The growth direction of the crystal, making it form spherical or nearly spherical ZnTiO 3 The material and particles show a good dispersion state, no serious agglomeration and large accumulation phenomenon, and the particle size is mostly around 80nm. Due to quantum effects induced by nanoparticles, ZnTiO 3 The conduction band and valence band of the material become discrete energy levels, the energy gap widens, and the energy of photogenerated electrons and holes is higher, thus having stronger oxidation-red...

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Abstract

The invention provides a preparation method for a photocatalytic material ZnTiO3 with special morphology. The preparation method comprises the following steps: 1) separately preparing a surfactant solution, a Zn source solution and a Ti source solution with specific concentrations and uniformly mixing the Zn source solution with the Ti source solution; 2) with the surfactant solution as mother liquor, slowly adding a mixed solution and a precipitating agent into the mother liquor drop by drop, controlling the temperature and acid-base value of a reaction system, and carrying out intense stirring so as to produce a ZnTiO3 precursor suspension; and 3) subjecting the suspension to centrifugation, washing and drying successively and then carrying out calcining in the air so as to obtain the ZnTiO3photocatalytic material with special morphology. The synthetic method provided by the invention is low in temperature, energy-saving and free of secondary pollution; and the synthesized photocatalytic material has the characteristics of uniform particle size, unified morphology, excellent performance, etc. The preparation method for the photocatalytic material ZnTiO3 with special morphology belongs to the field of photocatalytic materials.

Description

technical field [0001] The invention relates to a preparation method of a zinc titanate photocatalyst material with a special shape. Background technique [0002] TiO 2 It is an important semiconductor photocatalytic material. It has the characteristics of high photocatalytic degradation of organic matter, stable chemical properties, chemical and photochemical corrosion resistance, and non-toxicity. Therefore, it has great potential application value in sewage treatment and air purification. However TiO 2 It is a wide-bandgap material, which can only absorb the ultraviolet part of the solar spectrum, and has low solar energy utilization efficiency. It usually needs to be excited by an ultraviolet light source, which limits its practical application. In order to improve the TiO 2 People have carried out many useful attempts on the utilization of sunlight. Studies have found that ZnO is a material with a small band gap, which can be used for photocatalytic treatment of was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B01J23/06B82Y30/00
CPCC01G23/00B01J23/06C01P2004/64C01P2004/03C01P2004/10C01P2004/32C01P2002/72B01J35/39
Inventor 李俊生崔洪涛关天宇
Owner HARBIN UNIV OF COMMERCE
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