Hollow tubular carbon nitride photocatalyst and its preparation method and application

Abstract

The invention discloses a hollow tubular carbon nitride photocatalyst and its preparation method and application. The hollow tubular carbon nitride photocatalyst is prepared by using urea and melamine as raw materials through hydrothermal heating and calcination. The molar ratio of urea and melamine is The ratio is 1 to 5:1. The hollow tubular carbon nitride photocatalyst of the present invention has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, strong light absorption ability, and high photocatalytic activity. It is a novel morphology structure and excellent photocatalytic performance. The preparation method of the new visible light catalyst has the advantages of simple process, easy operation, low cost, and no secondary pollution. It is suitable for large-scale preparation and is conducive to industrial application. The photocatalyst of the present invention can degrade organic pollutants, can achieve efficient removal of organic pollutants, has the advantages of simple process, convenient operation, low cost, high treatment efficiency, good removal effect, etc., and has good application value and application prospects.

Description

technical field [0001] The invention belongs to the field of visible light catalysis, and relates to a hollow tubular carbon nitride photocatalyst and a preparation method and application thereof. Background technique [0002] Azo dye RhB is a dye widely present in textile, cosmetics, and printing wastewater. It is a relatively common organic pollutant. It has toxicity and refractory biodegradability, and has gradually become the focus of research; in addition, tetracyclines Antibiotics are one of the most commonly used antibiotics to treat bacterial infections in animals and humans. Therefore, tetracycline antibiotic wastewater is also the focus of attention in recent years. Every year, a large amount of organic pollutants such as chemical dye wastewater and antibiotic excreta enter the environment. In order to solve the above-mentioned organic pollutant wastewater and other problems, researchers have proposed a new way, which is to use photocatalysts to produce Catalytic ...

AI Technical Summary

Problems solved by technology

So far, carbon nitride photocatalysts have several different morphologies, including nanoflakes, nanobelts, hollow spheres, nanorods, and nanofibers, etc. However, these carbon nitride photocatalysts with different morphologies still have specific surface area Disadvantages such as small size, few active sites, severe recombination of photogenerated carriers, poor light absorption ability, and low photocatalytic activity

In addition, most of the synthesis processes of existing carbon nitride photocatalysts are template methods, and templates need to be removed during their synthesis process, which is not conducive to improving the preparation efficiency, and leads to complex preparation processes, high preparation costs, and time-consuming At the same time, these synthesis processes require extensive use of various organic material additives or high-pressure conditions, where organic additives are usually difficult to completely remove, and their residual amount will not only affect the photocatalytic performance of carbon nitride photocatalysts, but these organic additives may also It has adverse effects on the environment, and the existence of these problems severely limits the wide application of carbon nitride photocatalysts.

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