Method for preparing textile fiber/graphene/BiVO4/BiPO4 composite environmental catalytic material

Abstract

The invention relates to a method for preparing a textile fiber / graphene / BiVO4 / BiPO4 composite environmental catalytic material. The method comprises the steps: dipping textile fibers into a saturated dispersion solution of graphene oxide, then, carrying out baking, carrying out washing, then, putting the washed textile fibers into a reducer solution, carrying out a reaction for 0.5 to 1 hour at the temperature of 50 DEG C to 80 DEG C, carrying out washing, and carrying out baking, so as to obtain textile fiber / graphene; and adding the textile fiber / graphene into a solution of Bi(NO3)3 and Na3PO4, carrying out stirring, then, adding NaVO3, NaH2PO4 and urea, carrying out a hydrothermal reaction for 3 to 8 hours at the temperature of 120 DEG C to 180 DEG C, carrying out cooling, then, carrying out washing, and carrying out baking, thereby obtaining the textile fiber / graphene / BiVO4 / BiPO4 composite environmental catalytic material. The method disclosed by the invention is simple and is adaptable to industrial production; and the obtained composite material has a relatively good environment purification effect.

Description

technical field [0001] The invention belongs to the field of preparation of environmental catalytic materials, in particular to a textile fiber / graphene / BiVO 4 / BiPO 4 A method for preparing a composite environmental catalytic material. Background technique [0002] Environmental resources are an important basis for the survival and development of human society. The governance and protection of the environment has been running through the history of the development of human industrial society and is directly related to the sustainable development of human society. Water shortage is an important issue facing society today, and the treatment of industrial wastewater has always been the top priority in the environmental field. In recent years, the treatment of some low-concentration toxic pollutants in actual wastewater, such as conjugated dyes, chlorinated aromatic compounds, polybrominated diphenyl ethers, antibiotics, etc., has become the focus of international research. ...

AI Technical Summary

Problems solved by technology

Adsorption and biological treatment are commonly used in industry. The adsorption method only transfers toxic pollutants from the liquid phase to the solid phase, but does not completely eliminate organic pollutants. The biological treatment cycle is long and the equipment occupies a large area. Biological toxicity can not be effectively removed

In contrast, advanced oxidation technologies can directly degrade dyes and other organic substances by producing strong oxidizing active species, and even completely mineralize them, which has attracted widespread attention. However, these advanced oxidation technologies also have certain limitations, such as easy to bring Secondary pollution, high treatment cost, unsuitable for large-flow wastewater treatment, and the priority removal of toxic target pollutants in the presence of a large number of organic / inorganic compounds is quite difficult, so it is very difficult to design and develop an efficient removal of toxic target pollutants in actual wastewater systems The catalytic system is of great significance

[0003] In order to construct high-efficiency micro-nano structures on the surface of textile fibers and overcome the adverse effects of the use of adhesives on the performance of catalytic fibers, the researchers tried to use the sol-gel finishing method to prepare catalytic functional fibers. The research results showed that the catalytic fibers prepared by this method The fiber has certain catalytic properties, but there are the following problems: (1) the curing of the gel must be carried out at high temperature, which has an impact on the physical and mechanical properties of the textile fiber, such as a large loss of tear strength; (2) the sol- The gel method prepares an amorphous nano-photocatalyst with no photocatalytic performance, so it needs to be converted to the desired crystal form through a certain way, and the crystallinity of the crystal phase needs to be improved to reduce lattice defects; (3) high temperature Sintering is currently the most common method for transforming from amorphous phase to fixed shape and increasing crystallinity, but the calcination temperature generally needs to be 300°C or above to achieve it. Obviously, conventional textile fibers cannot withstand such a high temperature. This is the sol-gel method. Common problems when applied to organic-loaded substrates; (4) direct contact between photocatalysts and fibers will cause photooxidative degradation of fibers, resulting in a decrease in the physical and mechanical properties of textile fibers

The low-temperature method is to use the precursor as the precursor to prepare a stable sol through sol-gel technology, and then synthesize it on the surface of the fiber in situ, and realize the transformation of the nano-photocatalyst from the amorphous state to the fixed state on the fiber in boiling water at 100 ° C. The catalytic functional fiber prepared by the method has good net performance and is convenient to use, but there are problems such as textile fiber being degraded by photooxidation and large loss of strength.

Improving the photocatalytic performance by further increasing the loading of metal oxides on fiber materials will cause serious agglomeration of metal oxides, affect the effective specific surface area available for catalytic materials, and change the porous structure of textile fibers / metal oxide materials. , which is not conducive to the enrichment of organic pollutants on the surface of fiber materials, and will also affect the catalytic performance of catalytic materials