Carbon-coated carbon nitride nanowires and its preparation method and application of photocatalytic degradation of bisphenol-a

Abstract

The invention provides a carbon-coated carbon nitride nanowire, a preparation method thereof and an application of photocatalytic degradation of bisphenol A. The preparation method comprises: adding polyethylene glycol-polypropylene glycol-polyethylene glycol tri-block copolymer into water, adding nitric acid under stirring conditions, and waiting for polyethylene glycol-polypropylene glycol-polyethylene glycol tri-block copolymerization After the substance dissolves, add dicyandiamide and continue to stir to obtain a mixed solution; move it to a reactor for hydrothermal reaction, and freeze-dry the product to obtain a carbon-coated carbon nitride nanowire precursor; carbon-coated nitrogen The precursor of carbonized carbon nanowires is calcined at high temperature to obtain carbon-coated carbon nitride nanowires. The carbon-coated carbon nitride nanowire has a three-dimensional network structure, and the diameter of the nanowire is 50-100 nm, which has strong mechanical strength; it is applied to photocatalytic degradation of bisphenol A, and has high photocatalytic degradation activity, which is different from simple Compared with carbon nitride, the specific surface area is significantly increased, the spectral response range is greatly expanded, and the degradation rate is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a carbon-coated carbon nitride nanowire, a preparation method thereof and an application of photocatalytic degradation of bisphenol A. Background technique [0002] With the rapid development of industry, environmental pollution has become one of the most serious threats to human society, especially water pollution has aroused great concern. Photocatalytic technology is a new technology developed rapidly in recent decades. It can completely mineralize organic pollutants into carbon dioxide and water without secondary pollution. It has unique characteristics for degrading highly toxic and low-concentration organic pollutants in water environments. The advantages. Graphite carbon nitride (g-C 3 N 4 ) is the most stable carbon nitride structure at room temperature. As a metal-free visible light catalyst, it can absorb part of visible light, has good thermal stabili...

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Problems solved by technology

Hu et al. (Hu et al.Enhanced visible lightphotocatalytic performance of g-C 3 N 4 photocatalysts co-doped with iron and phosphorus [J]. Applied Surface Science, 2014, 331, 164-171.) Using dicyandiamide monomer, ferric nitrate and diammonium hydrogen phosphate as precursors, prepared iron and phosphorus co-doped nitrogen The research results show that the addition of dopants inhibits the crystal growth of graphitic carbon nitride, increases the specific surface area of ​​carbon nitride, reduces the band gap width, and inhibits the recombination of photogenerated electrons and holes; but Its light absorption is only up to 550nm, and it is difficult to balance wide spectral response, large specific surface area and high photocatalytic activity

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