Carbon nitride nano particle modified pucherite composite photocatalyst and preparation method thereof

Abstract

The invention discloses a carbon nitride nano particle modified pucherite composite photocatalyst and a preparation method thereof. Carbon nitride nano particles are dispersedly compounded on the surface of porous pucherite, and the porous pucherite is composed of bent pucherite nanorods; the preparation method comprises the steps of firstly, preparing carbon nitride powder, adding the carbon nitride powder to high-purity water and performing ultrasonic dispersion, adding bismuth nitrate pentahydrate and stirring until the mixture is dissolved completely, adding ammonium metavanadate and continuing to stir, carrying out centrifugal separation, washing and drying to obtain a solid sample, then performing heat treatment, and grinding into powder. According to the carbon nitride nano particle modified pucherite composite photocatalyst, the carbon nitride nano particles are small and are dispersedly compounded on the surface of the porous pucherite, so as to be beneficial to exposure of carbon nitride-pucherite interfaces with high activity and reduction of a charge transferring distance, and therefore, the carbon nitride nano particle modified pucherite composite photocatalyst has wide application prospect in the fields such as environment pollution control and energy; besides, the preparation method of the composite photocatalyst is simple, low in cost and good in repetitiveness, and can well meet the requirement of volume production.

Description

technical field [0001] The invention relates to the field of inorganic nano photocatalyst materials, in particular to a composite photocatalyst and a preparation method thereof. Background technique [0002] With the continuous development of society, people's demand for energy is increasing day by day, and their requirements for their own living environment are also getting higher and higher. However, the world today is facing two major problems of energy crisis and environmental pollution. This is mainly because the energy sources of countries in the world are mainly fossil energy sources, such as oil, coal, and natural gas. These energy sources are formed after a long process of hundreds of millions of years and are non-renewable resources. According to the current consumption rate, fossil energy will be exhausted in the near future. At the same time, the excessive use of fossil energy, the release of harmful gases, liquid and solid pollutants have caused serious enviro...

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the existing g-C 3 N 4 / BiVO 4 Composite photocatalysts have the disadvantages of large size, small specific surface area, large charge transfer distance from the bulk phase to the surface, insufficient exposure of the highly active phase interface, and difficulty in fully utilizing the synergistic effect of carbon nitride and bismuth vanadate. Carbon nitride nanoparticle-modified bismuth vanadate composite photocatalyst with high-efficiency charge separation and high photocatalytic activity and its preparation method. In the composite photocatalyst, carbon nitride nanoparticles are discretely compounded on the surface of porous bismuth vanadate, which is beneficial to exposure The highly active carbon nitride-bismuth vanadate phase interface has broad application prospects in the fields of environmental pollution control and energy; at the same time, the preparation method of the composite photocatalyst is simple, low in cost and good in repeatability, which can well meet mass production requirements

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