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A low-energy chemical field-driven organic pollutant degradation catalyst and its application

A technology of organic pollutants and low energy consumption, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the target treatment pollution It has the advantages of single chemical selectivity, harsh environment, high cost and other problems, and achieves good catalytic effect, good stability and low energy consumption.

Active Publication Date: 2021-06-15
浙江国千环境技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at a series of technical problems such as high energy consumption, high cost, expensive additives, harsh environment, single selectivity of target pollutants, and low efficiency, the present invention provides a reaction Mild conditions, low energy consumption, clean and efficient organic pollutant treatment catalyst

Method used

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  • A low-energy chemical field-driven organic pollutant degradation catalyst and its application
  • A low-energy chemical field-driven organic pollutant degradation catalyst and its application
  • A low-energy chemical field-driven organic pollutant degradation catalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0088] The preparation method of A component comprises the steps:

[0089] 1) Preparation of transition noble metal-based nanoparticles by deposition-precipitation, photoreduction or chemical synthesis;

[0090] 2) Preparation of carrier oxides;

[0091] 3) The transition noble metal-based nanoparticles and the carrier oxide were prepared as a solution, and ultrasonically dispersed; the solution of the transition noble metal-based nanoparticles was added to the solution of the carrier oxide under stirring conditions, centrifuged and vacuum-dried, and the resulting solid powder In oxygen, air, nitrogen or H at a volume ratio of 5:95 2 / Ar atmosphere calcined (100-600 ℃), that is A component.

[0092] The application of the above catalysts in the degradation of organic pollutants: the organic pollutants and B component are prepared as a mixed solution; the concentration of organic pollutants is 1*10-5-0.1 mol / L; the concentration of B component is 0.1-1mol / L; then add compon...

Embodiment 1

[0095] In this example, the chemical reduction method is used as an example to prepare Pd with a particle size of 5 nm. Weigh 150 mg of palladium diacetylacetonate into a 100 mL round-bottomed flask, measure 30 mL of oleylamine with a graduated cylinder, and stir in an oil bath at 60°C until the solution is clear; add 260 mg of borane-tert-butylamine complex (BTBC) was dissolved in 2 mL of oleylamine, then added dropwise to the flask, and the temperature was raised to 90°C for 1 h; after the solution was cooled to room temperature, 50 mL of absolute ethanol was added, centrifuged and washed with absolute ethanol for 2- After 3 times, dry it for later use.

[0096] TiO 2 Preparation of nanotubes: 0.6 g TiO 2 The powder and 60 mL NaOH (10 mol / L) solution were dispersed by ultrasonic wave for 30 min, and stirred in the dark for 1 h to mix well, then transferred to a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene liner (100 mL), sealed, Place in a b...

Embodiment 2

[0101] In this embodiment, the preparation of Pd nanoparticles by the photoreduction method is taken as an example. Prepare PdCl 2 aqueous solution, weigh 1 g of TiO 2 Nanoparticles (25 nm) were added to 10 mL of deionized aqueous solution, ultrasonically dispersed for 10 min, and PdCl was added dropwise during stirring 2 After the solution was added dropwise, stir for 30 min, irradiate the solution under a 300 W mercury lamp for 1 h, take out the centrifuged water, wash 2-3 times, and dry. By changing the precursor PdCl 2 The amount of Pd to adjust the TiO 2 The amount of loading on it ranges from 0.1wt% to 5wt%.

[0102] Other parts of this embodiment can refer to Embodiment 1.

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Abstract

The invention relates to the field of environmental protection, and discloses a catalyst for degrading organic pollutants driven by a low-energy chemical field and an application thereof. The catalytic system of the invention can efficiently degrade various organic pollutants such as azo dyes and nitro compounds without providing external energy. The catalytic system uses formate as an auxiliary agent, and the catalytic material is mainly palladium, silver, gold, platinum, iridium, etc., which are loaded on the surface of the carrier oxide. When the root ion contacts with the transition noble metal interface, the C-H bond in the formate radical breaks to form active oxygen species. The active oxygen species include hydroxyl radicals, hydrogen peroxide radicals, carbonate radicals, etc., and the generated free radicals quickly absorb The organic matter is oxidized to naturally degradable small molecules, even non-toxic water, CO 2 Or carbonate, the organic pollutant degradation treatment method of the present invention has extremely high efficiency, low cost, and the catalytic system is stable and the recycling rate is high.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a catalyst for degrading organic pollutants driven by a low-energy chemical field and an application thereof. Background technique [0002] The environment is the basic prerequisite for human survival and development. With the rapid development of economy and continuous progress of society, the ecological environment on which human beings rely is increasingly polluted and destroyed. Protect the environment, reduce environmental pollution, and develop low-energy and efficient environmental governance technology. Water pollution is one of the three pollutions, among which organic pollution (printing and dyeing wastewater, pesticides, antibiotics, detergents, etc.) is of great significance to explore and develop low-cost and efficient methods for degrading organic pollutants in water due to its large content and high concentration . [0003] At present, there are mainly the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/52B01J31/38C02F1/30C02F101/30
CPCC02F1/30B01J23/44B01J23/52B01J31/38C02F2101/30C02F2101/308C02F2305/10B01J35/615B01J35/635B01J35/647
Inventor 李仁宏祝晓辉闫晓庆梁世潘陈佳荧
Owner 浙江国千环境技术发展有限公司
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