Preparation method of water hyacinth-Fe biochar and application of water hyacinth-Fe biochar

Abstract

The invention provides a preparation method of water hyacinth-Fe biochar and application of the water hyacinth-Fe biochar. The preparation method comprises the following steps: taking water hyacinth as a raw material and cultivating the water hyacinth with plant solution for one month, so as to obtain water hyacinth enriching 4-64 mg.L<-1> of Fe; performing low pyrolysis on the Fe-enriched water hyacinth at the temperature of 500-900 DEG C in a nitrogen atmosphere, so as to prepare a series of Fe-loaded water hyacinth biochar with different concentrations. A result shows that the water hyacinth biochar is rough in surface and has a lumpy structure on the surface, and Fe in the biochar exists in forms of two oxides: Fe2O3 and Fe3O4. A glassy carbon rotating disk electrode modified by various biochar particles is utilized to explore the electrocatalytic reduction reaction of H2O2 in a neutral medium on different biochar catalysts according to a cyclic voltammetry scanning method, the exploration discovers that a water hyacinth biochar sample has the maximum reduction current value and is most excellent in electro-catalytic property on H2O2, and different scanning experiments also verifies that the water hyacinth biochar sample also has the potential property of energy storage.

Description

technical field [0001] The invention relates to a preparation method and application of water hyacinth Fe biochar and belongs to the field of environmental biology. Background technique [0002] Biochar is a carbon-rich solid with high specific surface area prepared by thermochemical treatment. As a catalytic carrier, it has become a hot research direction for scientific researchers and has been applied to many environmental fields such as soil remediation, pollutant adsorption and environmental management. . [0003] Hydrogen peroxide (H 2 o 2 ) is an important chemical substance that plays an important role in bleaching, disinfection, oral care, food safety and other fields. More importantly, as an intermediate product of human metabolism, excessive hydrogen peroxide will greatly reduce the body's Antioxidant ability, thus inducing a series of diseases. Electrocatalytic reduction of H 2 o 2 There is a long history of research, and the catalysts used often include sin...

AI Technical Summary

Problems solved by technology

At present, iron-biochar composites are usually loaded with iron by immersing biochar in iron solution or mechanically mixing it directly with iron oxides. There is no report on the preparation of iron biochar by plant enrichment.

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