Hollow tubular carbon nitride photocatalyst and its preparation method and application

Abstract

The invention discloses a hollow tubular carbon nitride photocatalyst and a preparation method and application thereof. The hollow tubular carbon nitride photocatalyst is prepared from urea and melamine by hydrothermal and calcination, wherein the molar ratio of urea to melamine is (1-5):1. The hollow tubular carbon nitride photocatalyst has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, high light absorption capacity, high photocatalytic activity and the like. The novel visible light photocatalyst is novel in morphology and structure and excellent in photocatalytic performance. The preparation method of the hollow tubular carbon nitride photocatalyst has the advantages that the process is simple, operation is easy, the cost is low and no secondary pollution is caused. The method is suitable for large-scale preparation and facilitates industrialized application. The photocatalyst can degrade organic pollutants, can achieve the efficient removal of the organic pollutants, and has the advantages of being simple in process, convenient to operate, low in cost, high in processing efficiency, good in removal effect and the like. The photocatalyst has good application value and 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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