Method for preparing bi12tio20 nanometer powder by microwave-assisted sol-gel method

Abstract

The invention relates to a method for preparing Bi12TiO20 nano-powder by virtue of a microwave-assisted sol-gel method. The method is characterized by comprising the following steps: (1) adding Bi(NO3)3.5H2O into an HNO3 solution to obtain a solution A; (2) adding (CH3(CH2)3O)4Ti into glycol to obtain a solution B; (3) mixing the solution A with the solution B obtained in the step (2) to obtain a clarified solution C; (4) adding citric acid into the solution C, dropwise adding ammonia water to regulate the pH value of the solution to be 6-10, and stirring to obtain transparent sol; (5) condensing and drying the transparent sol at 100-130 DEG C to obtain dried gel; and (6) carrying out microwave heating decomposition on the obtained dried gel under a low vacuum condition. The method is short in technological process and reaction time and applicable to industrial batch production, and the microwave heating decomposition time is 7-15 minutes.

Description

technical field [0001] The invention relates to a microwave-assisted sol-gel method for preparing Bi 12 TiO 20 nanopowder method. Background technique [0002] Bi 12 TiO 20 It has a cubic structure, a symmetrical structure, and no residual dipole moment, so it has excellent photoelectric, electro-optic, and photocatalytic properties, and can be used in optical information processing, catalytic degradation, and other fields. Controlled synthesis of Bi with high purity and uniform morphology 12 TiO 20 The powder has a great influence on its photoelectric and photocatalytic properties, so the controlled synthesis of Bi with uniform morphology and pure phase 12 TiO 20 Powder is very necessary to broaden its application. [0003] Currently, the preparation of Bi 12 TiO 20 Powder methods mainly include solid-state reaction method, chemical solution deposition method, solvothermal synthesis method, etc. Bi synthesized by traditional solid-state reaction method 12 TiO 20...

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Problems solved by technology

The bismuth titanate crystal prepared by the chemical solution deposition method has better photocatalytic performance to the methyl orange solution in the ultraviolet range, and is also suitable for the research of doping modification (Journal of Molecular Catalysis A: Chemical, 2003: 305-311), but There are problems of low purity, large pollution, and difficult to control the shape; solvothermal synthesis method can synthesize zero-dimensional, one-dimensional, and two-dimensional nano-Bi 12 TiO 20 material (Chemical Communication, 2009: 3937-3939), but the process is relatively complicated, the requirements for production equipment and operators are high, and the yield is low, so it is not suitable for industrialization

In summary, the preparation of Bi by microwave-assisted sol-gel method 12 TiO 20 Powder has not been reported yet

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