Preparation method and application of primordial water hyacinth biomass carbon porous electrode material

A porous electrode and biomass carbon technology, applied in chemical instruments and methods, water pollutants, carbon compounds, etc., can solve problems such as water hyacinth invasive species, achieve rich oxygen reduction reaction active sites, and high electron transfer efficiency , the effect of excellent catalytic degradation activity

Active Publication Date: 2019-06-07
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Application Information

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Problems solved by technology

However, in the application field of electro-Fenton cathode materials, no one has applied biomass carbon as an electrode material to electro-Fenton degradation, and its degradation effect, characteristics and mechanism are not yet clear, so there is a high research value, and the present invention Research offers a new way to tackle water hyacinth invasive species

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  • Preparation method and application of primordial water hyacinth biomass carbon porous electrode material
  • Preparation method and application of primordial water hyacinth biomass carbon porous electrode material
  • Preparation method and application of primordial water hyacinth biomass carbon porous electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of water hyacinth biomass carbon porous electrode, the steps are as follows:

[0040] (1) Pretreatment of precursors:

[0041] After the roots of the water hyacinth plant were removed and discarded, the surface impurities of the stems and leaves were washed with deionized water, and then put into an oven for dehydration at 100° C. for 48 hours. The dried water hyacinth biomass is crushed into powder using a pulverizer. The biomass passed through a 100-mesh sieve was put into a sample bag and stored in a dry place away from light for future use.

[0042] (2) Activated carbonization of precursors:

[0043] Weigh three parts of 3.0g biomass powder and put them into 50mL beakers respectively, add zinc chloride (ZnCl 2 ) powder 0g, 3.0g and 6.0g, 9.0g and 12.0g, then add 25mL deionized water respectively, stir for 30min and mix well. The mixture was poured into a Petri dish, put in an oven for 2 h, and the solution was evaporated to dryness. Scrape the dried...

Embodiment 2

[0046] Example 2: Specific surface area, pore volume and pore size distribution test of water hyacinth biomass carbon material

[0047] The results of the specific surface area, pore volume and pore diameter of water hyacinth hydrangea biomass carbon before and after activation with zinc chloride are shown in Table 1:

[0048] Table 1

[0049]

[0050] S from Table 1 BET The data shows that with the increase of the proportion of the activator, the specific surface area and total pore volume of the water hyacinth biomass carbon material obtained after activation are larger; the maximum value is 845.184m3 of the specific surface area of ​​A4 2 / g, the corresponding pore volume is 1.108cm 3 / g. However, the specific surface area and micropore volume of A5 showed a downward trend. However, the total pore volume still increased to 1.300 cm 3 / g, which indicates that excessive activation will lead to the expansion of the pores, and the microporous structure will be transform...

Embodiment 3

[0055] Embodiment 3: Hydrogen peroxide production capacity test of the hyacinth hyacinth biomass carbon porous electrode prepared in embodiment 1

[0056] 1. Construction of three-electrode system

[0057] The water hyacinth biomass carbon porous electrode (3cm × 2cm) prepared in Example 1 is used as the cathode, the platinum electrode (Shanghai Russell Technology Co., Ltd., 213 type) is used as the anode, and the reference electrode is a saturated calomel electrode to form a three-electrode system together Applied to the measurement of E-Fenton hydrogen peroxide production.

[0058] 2. Preparation of titanium reagent

[0059] Take 272mL of 98wt% concentrated sulfuric acid and pour it into 300mL of distilled water. After the solution is cooled to room temperature, add 35.4g of potassium titanium oxalate dihydrate [K 2 TiO(C 2 o 4 ) 2 2H 2 O], and finally transferred to a 1L volumetric flask, added distilled water to constant volume and shaken well before use.

[0060] 3...

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Abstract

The invention belongs to the technical field of a preparation and application of a primordial water hyacinth biomass carbon material with a porous structure, and specifically discloses a preparation method of a novel electrode material and an application of the electrode material as a cathode in an electro-Fenton system to degrade endocrine disruptors. The electrode material takes water hyacinth biomass powder as a precursor, zinc chloride powder is added in different proportions to perform activating, the novel biomass carbon material is prepared by high temperature calcination under the protection of an inert gas, and finally a porous electrode is obtained as the cathode material for E-Fenton to degrade endocrine disruptors. The material has relatively good electrical conductivity and relatively large specific surface area. The material can be used as a novel electrode material, and a good degradation effect is especially shown in the electro-Fenton experiment.

Description

technical field [0001] The present invention relates to the technical field of activation, preparation and application of biomass carbon materials with rich pore structure, in particular to a preparation method of a novel water hyacinth biomass zinc chloride activated carbon material electrode and its application to E-Fenton as a cathode material Application of Response Degradation Endocrine Disruptors. Background technique [0002] Water hyacinth (also known as water hyacinth) was introduced from South America to China as poultry feed in the 1980s to solve the problem of food shortage. However, in recent years, water hyacinth has been gradually replaced by commercial feed with high nutritional value. A large number of water hyacinth plants are idle in rivers, lakes and other water bodies. Because it is an imported plant, there are no natural enemies and the water body is severely eutrophicated, resulting in the crazy growth of water hyacinth and flooding. Pieces of water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324C02F1/461C02F1/72C02F101/30C02F101/34
Inventor 孙杰梁珈祥汤迪勇黄丽陈伊妃陈柯
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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