Biomimetic Synthesis of Size-Controllable Prismatic Bismuth Phosphate Photocatalyst

Abstract

The invention discloses a biomimetic synthesis method of a size-controllable prismatic bismuth phosphate photo-catalyst. The biomimetic synthesis method comprises the following steps: (1) dissolving bismuth nitrate pentahydrate into a nitric acid solution of which the molar concentration is 1mol / L, uniformly stirring, adding gelatin, and continuously stirring for 2 hours to obtain a mixed solution; (2) adding sodium dihydrogen phosphate of which the molar quantity is equal to that of bismuth nitrate pentahydrate into the mixed solution obtained in the step (1), stirring for 0.5 hour, regulating the pH value of the system to be 1-7 by using ammonia water, continuously stirring for 0.5 hour, transferring to a hydrothermal reaction kettle, performing hydrothermal reaction for 6-24 hours at 140-210 DEG C, performing centrifugal separation, washing, and performing vacuum drying for 12 hours at 60 DEG C to prepare the prismatic bismuth phosphate photo-catalyst. The biomimetic synthesis method disclosed by the invention can avoid the synthesis in an organic solvent or a mixed solvent of an organic reagent and water, and also can avoid regulating the sizes of particles by using the organic solvent which is harmful to the environment, so that the biomimetic synthesis method is a synthetic method which is low in cost and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a biomimetic synthesis method of a size-controllable prismatic bismuth phosphate photocatalyst. Background technique [0002] As an advanced oxidation technology, photocatalytic degradation of pollutants has great application prospects in environmental remediation and has received more and more attention. Photocatalysts are at the heart of this technology. Among many semiconductor photocatalysts, TiO 2 Due to its biological inertness, strong oxidation, low cost and high efficiency, resistance to light corrosion and chemical corrosion, and strong stability, it is considered to be the most suitable photocatalyst for environmental pollution control. But TiO 2 There are still some shortcomings that are difficult to overcome, such as low utilization rate of sunlight, high recombination rate of photogenerated holes-electrons, and difficulty in separation...

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Problems solved by technology

While the usual BiPO 4 The preparation methods include co-precipitation method, hydrothermal method and solid phase method, etc. These conventional methods are very useful for controlling BiPO 4 The shape and size of the

The solvothermal method or the commonly used organic induction method can prepare photocatalysts with a certain shape, but because the process uses organic solvents or organic reagents, it increases the preparation cost and brings pressure to the environment. Therefore, it is necessary to find a simple and easy-to-operate The synthesis method of bismuth phosphate photocatalyst which is environmentally friendly and has controllable shape and size is of great significance

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