Nano Cu2O@ porous carbon composite photocatalysis material and preparation method thereof

Abstract

The invention relates to a nano Cu2O@ porous carbon composite photocatalysis material and a preparation method of the material. The nano Cu2O@ porous carbon composite photocatalysis material is prepared by taking sodium alginate (SA) as a framework and Cu<2+> as a cross-linking agent to form Cu<2+>@SA hydrogel, forming corresponding hydroxide in the hydrogel via a precipitation process and performing high temperature calcination. The composite photocatalysis material can be used for visible light catalytic degradation of dye wastewater. The preparation method well achieves waste recycling andsuccessfully synthesizes a photocatalyst with visible light response; a degradation effect is significant; and waste control by wastes is achieved. Sodium alginate used in the material is a natural degradable high polymer material; the preparation method is simple and practicable; a safe assistant and a solvent are used; no byproduct is generated; and the material has wide application prospects inpractical production.

Description

technical field [0001] The present invention relates to a kind of nano Cu 2 The invention discloses an O@porous carbon composite photocatalytic material and a preparation method thereof, belonging to the field of chemistry and environmental technology. Background technique [0002] Sodium alginate is the sodium salt of polyanionic polysaccharide (alginic acid) extracted from brown algae kelp or sargassum, which is abundant in the coasts of major oceans; it is a natural linear polymer containing a large amount of -OH, -COO - and other groups. Divalent metal ions can cross-link sodium alginate into a gel, and gelation and cross-linking are mainly through Na + It is obtained by exchanging with divalent metal ions. Divalent metal ions undergo ion substitution at the carboxyl group, and the other side chain alginic acid can also be connected with divalent metal ions, thereby cross-linking to form a hydrogel with a three-dimensional network structure. The formation of hydrogel...

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Problems solved by technology

[0003] Nano-cuprous oxide is a new type of p-type semiconductor material, which has unique optical and magnetic properties and is widely used in many fields. Cu 2 The traditional preparation methods of O include liquid-phase synthesis, hydrothermal synthesis, solvothermal method, and sol-gel method. The preparation process of the traditional preparation method is complicated, and Cu 2 The dispersibility of O is poor, and dispersants (such as PVP) are often used to disperse nano-metal particles, and at the same time, it is necessary to add reducing agents (such as hydrazine hydrate, glucose) to control nano-Cu 2 The formation of O, the excessive use of chemical additives in the preparation process, usually these additives are highly toxic and pose a huge safety hazard to the environment

[0004] After searching, using sodium alginate as a template, one-step synthesis of nano-metal oxide@porous carbon composite photocatalytic material and its use in visible light catalytic degradation of pollutants, no research reports have been found

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