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Method of synthesizing metatitanic acid/TiO2 nano composite material for hydrogen production from water by photodecomposition via one-step solvothermal method

A nanocomposite material, a technology for producing hydrogen by photo-splitting water, which is applied in the fields of hydrogen production, chemical instruments and methods, chemical/physical processes, etc. Poor activity, etc., to achieve the effects of cheap raw materials, large specific surface area, and simple operation

Inactive Publication Date: 2015-02-18
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor photocatalytic activity caused by the high probability of recombination of photogenerated carriers, few surface active sites, and easy agglomeration of the existing prepared titanium dioxide photocatalytic materials, and to provide a one-step solvothermal method Synthesis of titanic acid / TiO for photolysis of water to produce hydrogen 2 nanocomposite approach

Method used

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  • Method of synthesizing metatitanic acid/TiO2 nano composite material for hydrogen production from water by photodecomposition via one-step solvothermal method
  • Method of synthesizing metatitanic acid/TiO2 nano composite material for hydrogen production from water by photodecomposition via one-step solvothermal method
  • Method of synthesizing metatitanic acid/TiO2 nano composite material for hydrogen production from water by photodecomposition via one-step solvothermal method

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specific Embodiment approach 1

[0017] Specific embodiment 1: A kind of one-step solvothermal synthesis of titanic acid / TiO used for photolysis of water to produce hydrogen in this embodiment 2 The method of nanocomposite material is specifically operated according to the following steps:

[0018] 1. Add the weak base and titanium source dropwise to the alcohol solvent under stirring conditions, and continue stirring for 30 minutes to obtain the precursor; wherein, the volume ratio of the titanium source and the alcohol solvent is 1: (15-30), and the weak base and titanium The volume ratio of the source is 1: (0.4~3.4);

[0019] 2. Transfer the suspension obtained in step 1 to a hydrothermal kettle, place it in a blast drying oven and react for 12 to 24 hours at a temperature of 150 to 180°C;

[0020] 3. Wash the product reacted in the blast drying oven in step 2, and then ultrasonically disperse it in absolute ethanol, and wash it repeatedly for 3 times; wherein, the washing condition is: the centrifuge sp...

specific Embodiment approach 2

[0023] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the feature described in step one is that the weak base is ammonia water, hydrazine hydrate, cyanamide or hydroxylamine or a mixed solution of several kinds. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the alcohol solvent in step one is methanol, ethanol, ethylene glycol, isopropanol or a mixed solution mixed in any ratio . Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method of synthesizing a metatitanic acid / TiO2 nano composite material for hydrogen production from water by photodecomposition via a one-step solvothermal method, relating to a preparing method of a metatitanic acid / TiO2 nano composite material for hydrogen production from water by photodecomposition, and aiming at solving the problem that an existing titanium oxide photocatalyst material has poor photocatalytic activity due to high probability of agglomeration since a photon-generated carrier has high possibility of composition, and surface active sites are few. The method comprises the following steps: adding weak base and a titanium source to an alcohol solvent, reacting in a hydrothermal kettle, washing, and drying the product obtained after washing, thus obtaining the metatitanic acid / TiO2 nano composite material. Compared with the prior art, the method is simple, is low in cost, and can realize large-scale synthesis; the prepared metatitanic acid / TiO2 nano composite material is greatly increased in specific surface area, and has high capacity of hydrogen production from water by photodecomposition under ultraviolet light.

Description

technical field [0001] The invention relates to a titanic acid / TiO used for photolysis of water to produce hydrogen 2 Preparation methods of nanocomposites. Background technique [0002] In recent decades, with the continuous growth of global energy demand, research on finding new energy sources has attracted more and more attention. Hydrogen energy, as a secondary energy source, has many advantages such as cleanness, high efficiency, safety, storability, and transportability. It has been generally regarded as an ideal pollution-free green energy source in the new century, so it has been highly valued by various countries. . Industrial hydrogen production usually adopts unenvironmentally friendly and economical methods such as natural gas steam reforming process. The photo-splitting water technology was first reported and discovered by two professors, Fujishama and Honda, from the University of Tokyo, Japan. 2 The phenomenon of hydrogen generation by photocatalytic decom...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/10C01B3/04
CPCY02E60/36
Inventor 付宏刚郭世恩蒋保江李明霞郝蓉栾玉婷
Owner HEILONGJIANG UNIV