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Titanium dioxide/graphene/molecularly imprinted composite material and its preparation method and application

A technology of molecular imprinting and titanium dioxide, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc. strong, low catalytic efficiency, etc., to achieve good affinity and recognition, realize photocatalytic performance, and enhance the effect of photocatalytic ability

Active Publication Date: 2018-11-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide band gap of titanium dioxide, it can only absorb and utilize the ultraviolet part of sunlight, and there is a problem that photogenerated electrons and holes are easy to recombine, resulting in low catalytic efficiency.
Not only that, but its weak affinity to pollutants and low selectivity are another reason for its low catalytic efficiency

Method used

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  • Titanium dioxide/graphene/molecularly imprinted composite material and its preparation method and application
  • Titanium dioxide/graphene/molecularly imprinted composite material and its preparation method and application
  • Titanium dioxide/graphene/molecularly imprinted composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A titanium dioxide / graphene / molecularly imprinted composite material of the present invention uses bisphenol A as a template molecule, the titanium dioxide / graphene composite material is used as an imprinted carrier, and o-phenylenediamine is used as a functional monomer, and is formed by a polymerization reaction under photoinitiation A molecularly imprinted polymer, eluting template molecules in the molecularly imprinted polymer to obtain a titanium dioxide / graphene / molecularly imprinted composite material.

[0045] A preparation method of the titanium dioxide / graphene / molecularly imprinted composite material in the above-mentioned present embodiment, comprising the following steps:

[0046] (1) Preparation of graphene oxide: take 0.6g graphite powder, 1.0g NaNO 3 Added to a 250mL three-necked flask. Under the condition of ice bath and stirring, slowly pour 35mL of concentrated H 2 SO 4 , continue to stir for 1h, then take 3g KMnO 4 Slowly added to the three-necke...

Embodiment 2

[0075] The application of a titanium dioxide / graphene / molecularly imprinted composite material of the present invention in the removal of bisphenol A in water comprises the following steps:

[0076] Under dark conditions, an equal amount of 150mg of the MIP-TiO of Example 1 2 / GR and NIP-TiO in Comparative Example 2 2 / GR were added to 150mL, concentration of 8mg / L of bisphenol A solution, after magnetic stirring reached adsorption equilibrium, the concentration at this time was taken as the initial concentration (C 0 ), and then place the solution under a 300W xenon lamp light source for photocatalytic degradation treatment to complete the treatment of the bisphenol A solution. Take out the degraded solution, centrifuge it in a centrifuge, and then filter it with a 0.22 μm filter head. Finally, measure the peak area of ​​the characteristic peak of the filtered solution under high performance liquid chromatography, and calculate the corresponding concentration of bisphenol A ...

Embodiment 3

[0083] The application of a titanium dioxide / graphene / molecularly imprinted composite material of the present invention in the removal of bisphenol A in water comprises the following steps:

[0084] Under dark condition, the MIP-TiO that makes in 150mg embodiment 1 2 / GR was added to 150mL bisphenol A solution with a concentration of 8mg / L, and the pH value of the solution was adjusted to 3, 4, 5, 6, 7, 8, 9, 10 with NaOH or HCl to reach adsorption equilibrium Finally, the solution was placed under a 300W xenon lamp light source for photocatalytic degradation treatment for 180 minutes to complete the treatment of the bisphenol A solution. Take out the degraded solution from it, centrifuge it in a centrifuge and then filter it with a 0.22 μm filter head, and finally measure the peak area of ​​the characteristic peak of the filtered solution under high performance liquid chromatography, and calculate the corresponding bisphenol A Concentration, and according to the analysis of M...

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Abstract

The invention discloses a titanium dioxide / graphene / molecularly imprinted composite material and a preparation method and application thereof. According to the composite material, bisphenol A serves as template molecules, a titanium dioxide / graphene composite material serves as an imprinting carrier, o-phenylenediamine serves as functional monomers, a polymerization reaction is carried out under photo-initiation, a molecularly imprinted polymer is formed, and the titanium dioxide / graphene / molecularly imprinted composite material is prepared after the template molecules in the molecularly imprinted polymer are washed out. The titanium dioxide / graphene / molecularly imprinted composite material has a small energy gap, high visible light region light absorption intensity, higher affinity and recognition capacity and higher catalytic capacity, can be widely used for removing bisphenol A in water, can selectively adsorb and efficiently and catalytically degrade the target pollutant bisphenol A, has the advantages of being easy and convenient to operate, high in treatment efficiency, wide in application range, free of toxic effects on the environment and the like, and has wide application prospects in the field of treatment of environmental pollution.

Description

technical field [0001] The invention belongs to the field of physical and chemical treatment of bisphenol A in polluted environments, and relates to a titanium dioxide / graphene / molecularly imprinted composite material and its preparation method and application, in particular to a titanium dioxide / graphene / molecularly imprinted composite material and its preparation The method and the application of the material in removing the environmental hormone bisphenol A in water. Background technique [0002] Environmental hormones, also known as environmental endocrine disruptors, are a large class of exogenous chemical substances that exist in the environment, most of which have estrogen-like effects, can destroy the stability and coordination of the internal environment of the body, and cause hormone secretion disorders in the body and reproductive organ deformity or even canceration, affecting the survival and reproduction of offspring. In recent years, due to the continuous rele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30C02F1/72C02F101/34
CPCY02W10/37
Inventor 王漫漫赖萃曾光明黄丹莲张辰王荣忠许飘程敏黄超秦蕾万佳
Owner HUNAN UNIV
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