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Photoelectrocatalysis anode material for removing phthalates and treatment method

A phthalic acid and photoelectric catalysis technology, which is applied in chemical instruments and methods, water treatment of special compounds, light water/sewage treatment, etc., can solve problems such as poor photocatalytic activity, single identification types, high environmental toxicity, etc., and achieve Good pertinence and selectivity, high removal efficiency

Active Publication Date: 2020-03-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to the waste of a large amount of photoelectric energy on the treatment of these low-toxicity and high-concentration natural organic matter, while the really highly toxic trace phthalate pollutants still remain in the water body, maintaining high environmental toxicity
[0004] Molecular imprinting technology usually has good selective adsorption and recognition capabilities. However, traditional molecularly imprinted polymer materials are not suitable as photoelectrocatalytic materials because these organic materials have poor photocatalytic activity and are easily lost under the attack of hydroxyl radicals. issues of recognition
Although some inorganic molecular imprints can maintain good photocatalytic activity, their recognition types are too single and can only remove specific pollutants.
However, pollutants with similar structures often have very similar environmental toxicological effects
This shows that the great challenge facing the current environmental photocatalytic materials is how to simultaneously identify and enrich the photocatalytic materials for a class of pollutants with similar chemical structures.

Method used

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  • Photoelectrocatalysis anode material for removing phthalates and treatment method
  • Photoelectrocatalysis anode material for removing phthalates and treatment method
  • Photoelectrocatalysis anode material for removing phthalates and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of photoelectric catalytic anode material that removes phthalates, its preparation method comprises the following steps:

[0025] 1) At room temperature, template molecules (phthalic anhydride or dibutyl phthalate) are added to a certain volume of polystyrene microspheres or silica microspheres in a dispersion containing 274mg / L, The mass ratio of the template molecule to the microsphere was 20. The polystyrene microspheres or silica microspheres used have a diameter of 350 nm. After that, 50 mg / L of 2-(N-morpholino)ethanesulfonic acid was added, and stirred at 60° C. for 300 min in the absence of oxygen.

[0026] 2) Place the conductive surfaces of two pieces of conductive glass (fluorine-doped tin dioxide or fluorine-doped indium tin oxide) facing each other, vertically put them into the solution in step 1), and place them on an anti-seismic table while avoiding vibration. After 72 hours, the solution was completely evaporated, and the template-preassembled e...

Embodiment 2

[0029] In a reactor made of quartz, the photoelectrocatalytic anode material imprinted with a pseudo-template prepared in Example 1 is used as the photoanode, the platinum sheet is used as the cathode, and the saturated calomel electrode (SCE) is used as the reference electrode, and the electrolyte solution is: containing 0.3mol L -1 0.1mol L of phthalates -1 Sodium sulfate electrolyte solution. A 300W short-arc Xe lamp was equipped with a UV filter as the light source, and a bias voltage of 0.6V (vs. SCE) was applied. Finally, qualitative and quantitative determinations were carried out by high-resolution liquid chromatography-mass spectrometry. The photocatalytic anode material has a photocatalytic degradation kinetics of phthalates up to 0.0132min -1 , which is 6.98 times that of ordinary titanium dioxide photoanodes.

Embodiment 3

[0031] In a reactor made of quartz, the photoelectrocatalytic anode material imprinted with a pseudo-template prepared in Example 1 is used as the photoanode, the platinum sheet is used as the cathode, and the saturated calomel electrode (SCE) is used as the reference electrode, and the electrolyte solution is: containing 0.1mol L -1 0.1mol L of phthalates -1Sodium sulfate electrolyte solution. A 300W short-arc Xe lamp was equipped with a UV filter as the light source, and a bias voltage of 0.6V (vs. SCE) was applied. Finally, qualitative and quantitative determinations were carried out by high-resolution liquid chromatography-mass spectrometry. The photoelectrocatalytic anode material has high selectivity, such as figure 2 As shown, under the interference of 1000 times the concentration of natural organic matter, its removal efficiency of phthalates is not affected; while ordinary titanium dioxide electrode is under the interference of 100 times of natural organic matter,...

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Abstract

The invention relates to a photoelectrocatalysis anode material for removing phthalates and a treatment method. The photoelectrocatalytic anode material is synthesized through three steps: firstly, modifying pseudo template molecules on the surface of silicon dioxide microspheres or polystyrene microspheres; arranging the modified microspheres into a three-dimensional array with an opal structurethrough a self-assembly method, finally filling gaps among the microspheres with a titanium dioxide sol-gel precursor, removing the pseudo template and the microspheres through high-temperature annealing and also forming titanium dioxide crystals. The titanium dioxide photoelectrocatalytic anode material imprinted by the pseudo template is used for removing phthalate pollutants. Compared with thematerials in the prior art, the photoelectrocatalytic anode material has special affinity for phthalate pollutants and can realize preferential removal of phthalate. In a complex system, the completeremoval of the phthalates can still be realized even under the interference of natural organic matters with the concentration of 1000 times.

Description

technical field [0001] The invention belongs to the technical field of self-assembly electrodes of energy, environment and nanometer materials, and relates to a pseudo-template sacrificial method for preparing a photoelectrocatalytic anode material and a treatment method for photocatalytically removing phthalate pollutants. Background technique [0002] Since the 20th century, environmental issues have been a hot topic of concern. As an inexhaustible and inexhaustible energy source, solar energy has been vigorously developed and applied by researchers in the environmental field. However, the direct use of photocatalysis for water pollution treatment will be affected by the high recombination rate of electrons and holes, resulting in a decrease in photon quantum efficiency. Therefore, people have developed a photocatalytic method on this basis. Under a certain bias voltage, the photoexciton has directional migration, thereby reducing the recombination of photogenerated elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/30C02F1/72B01J21/06C02F101/34
CPCC02F1/46109C02F1/4672C02F1/30B01J21/063C02F2001/46133C02F2101/34C02F2305/10C02F2305/023B01J35/39B01J35/33
Inventor 赵国华蔡郡倬
Owner TONGJI UNIV
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