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Preparation and application method of biochar-based monatomic palladium-copper catalyst

A carbon-based monocatalyst technology, applied in chemical instruments and methods, water pollutants, reduced water/sewage treatment, etc., can solve problems such as differences in physical and chemical properties, achieve high stability, simple preparation process, and high-efficiency activity Effect

Active Publication Date: 2022-05-27
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, due to the limitations of the preparation process of biomass carbon and its surface composition characteristics, there are large differences in its physical and chemical properties, which restricts the practical application of biochar. Therefore, how to determine the specific surface area, pore structure and surface functional groups of biomass carbon Physical and chemical properties of the surface modification, so that it has a single-atom metal loading conditions is currently a research hotspot and difficulty in the field of single-atom materials

Method used

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  • Preparation and application method of biochar-based monatomic palladium-copper catalyst
  • Preparation and application method of biochar-based monatomic palladium-copper catalyst
  • Preparation and application method of biochar-based monatomic palladium-copper catalyst

Examples

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Embodiment 1

[0067] A preparation method of a biological carbon-based single-atom palladium-copper catalyst, comprising the following steps:

[0068] (1) Cut the bamboo into about 10×10×3mm 3 After immersion in 0.1M NaOH for 4 hours, the organic matter in the block of the size is destroyed, and then repeatedly washed with deionized water for 2-5 times to remove the residual inorganic impurities, and then dried in an oven at 60 °C for 6 hours;

[0069] (2) Then collect the sample, put the bamboo carbon and urea (dicyandiamide) with a mass ratio of 1:10 (4) in 60 mL of deionized water, stir with a constant temperature magnetic stirrer at a rotating speed of 400 rpm and at a temperature of 80 ° C heated to dryness;

[0070] (3) In a tube furnace at a heating rate of 10°C / min, in a nitrogen atmosphere and a gas pressure of 0.05MPa, pyrolyze at a high temperature of 800°C for 1 h, and obtain the experiment by cooling, grinding and sieving (10-20 mesh). The desired nitrogen-doped graphitized p...

Embodiment 2

[0076] The biological carbon-based single-atom palladium-copper catalyst prepared in this example was applied to the nitrate nitrogen reduction experiment in water.

[0077] Weigh 100 mg of the biological carbon-based single-atom palladium-copper catalyst prepared in this example and place it in a catalytic reduction reaction device. The catalytic reduction reaction device is a rectangular plexiglass tank, the reactor is divided into cathode and anode chambers by a homogeneous cation exchange membrane, and the volume of each reaction chamber is 150 mL. The volume of nitrate nitrogen wastewater treated in the experiment is 125mL, and the initial concentration is 100mg / L (in terms of N). Titanium ruthenium mesh is used as the cathode and anode electrodes, respectively. The cathode chamber of the reactor is added with a certain concentration of nitrate nitrogen configured in the laboratory. The mixed solution of waste water and 0.2g / L sodium sulfate electrolyte, the same concentr...

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Abstract

The invention discloses preparation and application of a biochar-based monatomic palladium-copper catalyst. Moso bamboos are cut into block structures, organic matter of the moso bamboos is destroyed with sodium hydroxide, and drying is conducted after repeated washing; collecting a sample, putting the moso bamboo carbon and urea (dicyandiamide) in a certain mass ratio into deionized water, and stirring until the mixture is dry; pyrolyzing the sample in a tubular furnace, grinding and sieving; weighing palladium chloride and copper chloride according to a certain mass ratio, dissolving, and fixing the volume by using a polyethylene glycol solution; putting a pyrolytic sample into a conical flask, adding a mixed solution of palladium chloride and copper chloride, then carrying out ultrasonic treatment and aging, and dropwise adding sodium borohydride while stirring until the solution is clear; and then oscillating, carrying out suction filtration, repeatedly cleaning, and drying in a vacuum freeze dryer to obtain the moso bamboo biochar-based monatomic palladium-copper catalyst material. The catalyst not only has a good reduction effect on nitrate nitrogen in surface water and underground water, but also provides a scientific and effective way for realizing agricultural waste resourceful treatment.

Description

technical field [0001] The invention belongs to the field of environmental functional material preparation and catalytic application, and more particularly, particularly relates to a preparation of a single-atom palladium-copper functional material and an application method for electrocatalytic reduction thereof. Background technique [0002] Nitrate nitrogen pollution in groundwater in my country has always been widespread and increasingly serious. It can directly or indirectly enter the human living environment or the body of animals and plants. The nitrate nitrogen content in the water is too high, causing harm to the human body. Long-term drinking of nitrate nitrogen polluted water, It will cause children's mental decline, unresponsiveness and other physical diseases. The common treatment methods for it are biological treatment, physical treatment, chemical reduction and so on. Electrocatalytic reduction has attracted extensive attention due to its advantages of simple o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/70C02F101/16
CPCC02F1/4678C02F2001/46133C02F2101/163Y02W10/37
Inventor 朱宗强董翼张立浩吴雨晴朱义年刘霜霜唐沈杨永华周帅江慧玲孔俞凇
Owner GUILIN UNIVERSITY OF TECHNOLOGY