Method for one-step hydrothermal synthesis of different-morphology bismuth tungstate two-dimensional photocatalytic materials

Abstract

The present invention discloses a method for one-step hydrothermal synthesis of different-morphology bismuth tungstate two-dimensional photocatalytic materials, and the method is as follows: adding 16.5-165mg of sodium tungstate and 2.5-25mg of cetyltrimethylammonium bromide into 40mL of deionized water, a nitric acid solution or a hydrochloric acid solution, and stirring for completely dissolving to obtain a solution A; adding 3.61-361mg of bismuth nitrate pentahydrate into the solution A, and stirring and mixing evenly to obtain a solution B; placing the solution B into a high-pressure reactor, or adding a sodium hydroxide solution into the solution B, and then placing the solution B into the high-pressure reactor, sealing the high-pressure reactor, putting the high-pressure reactor in an oven for constant temperature reaction at 120 DEG C for 24h, after the reaction is completed, naturally cooling to room temperature, taking a product out, centrifugally separating, and drying to obtain the different sizes and structures of bismuth tungstate two-dimensional photocatalytic materials. The method can be used for synthesis of the bismuth tungstate two-dimensional photocatalytic materials with controlled sizes and structures by the simple one-step hydrothermal reaction. The synthesis method has the advantages of simple operation, green raw materials, low cost, short preparation cycle and good repeatability, and is convenient for popularization.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic two-dimensional photocatalytic materials, and specifically relates to a method for synthesizing bismuth tungstate two-dimensional photocatalytic materials with different shapes by a one-step hydrothermal method. Background technique [0002] With the rapid development of industry, the accompanying environmental problems have a greater impact on people's lives, such as organic matter, heavy metals, aromatics and other pollutants in water have a serious impact on food safety. Therefore, the treatment of water pollution is an important research topic at present. Bismuth-based materials, such as Bi 2 WO 6 、BiVO 4 、 Bi 2 o 2 CO 3 , BiOCl and other materials are used to photocatalytically degrade pollutants and realize the use of solar energy to treat the environment, which has far-reaching theoretical and practical significance for solving environmental pollution problems. Bi 2 W...

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Problems solved by technology

[0004] The patent with the publication number CN105457626A discloses a method for preparing concave nanosheets. Although it obtains higher photocatalytic performance through modification, the preparation process is complicated, the reaction temperature is too high, and organic solvents are used, which is not conducive to Widespread promotion and use

Literature ([1] Chemsuschem, 2013, 6(10):1873-1877, [2] Cheminform, 2015, 46(31):2560-2564) reported the synthesis of Bi by hydrothermal method 2 WO 6 However, the preparation process of literature (1) is relatively complicated, and the reaction temperature is high and the time is long. The nanosheets prepared in literature (2) are thick, which affects the migration of electrons and holes, thereby affecting the photocatalytic performance. , and the present invention uses a one-step hydrothermal method to successfully prepare two-dimensional bismuth tungstate nanosheets with adjustable size and structure. The preparation method is simple, and it provides a new idea for the synthesis of bismuth tungstate two-dimensional photocatalytic materials

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