Use of assembled N-Ag-TiO2-ZnO nano cage in methylyellow degradation reaction under visible light

Abstract

An important way for improving the performance of a photocatalyst is to prolong a diffusion distance of the photocatalyst and increase the transmission depth of the photocatalyst. Meanwhile, the absorption range of visible light of the photocatalyst is expanded by adopting a doping method so as to suppress the combination speed of electrons and holes. A three-dimensional level hole N-Ag-TiO2-ZnO nano cage composite material is prepared. The N-Ag-TiO2-ZnO nano cage composite material is formed by assembling nano rods, an octahedron and a cylinder with a polymer assisted method, so that the composite material integrates the advantages of high activity catalysis of the octahedron, a large length-diameter ratio of the rod and a relatively large specific surface area of the cylinder and forms alevel hole structure. By comparison of differences among the degradation reactions of several composite materials, the advantage of a cage-shaped structure in improving the light capture capacity under the structure and component synergistic action is obtained. The invention relates to the crossing field of chemistry, material and physics; a research achievement provides a new idea for preparation and assembling of a TiO2 composite material, the growth mechanism of a colloid material and preparation of an efficient photocatalyst, and has important theoretical and practical significance for research and development of treatment of environmental pollution.

Description

Technical field: [0001] The invention belongs to the controllable preparation and mechanism exploration of nanomaterials, in particular to the controllable preparation of plasma N-Ag-TiO 2 -ZnO composites, and methods to optimize their photocatalytic properties. Background technique [0002] The preparation of a three-dimensional hierarchical pore structure rich in catalytic active sites is of great significance for improving the photocatalytic performance of materials. Excellent photocatalytic materials require ingenious structural design, usually combining zero-dimensional, one-dimensional and two-dimensional structures, which is of great significance for prolonging the absorption path of light propagation and improving the photocatalytic performance of materials. At the same time, the low energy band gap and strong electron and hole separation ability play a significant role in improving the photocatalytic performance of the material. The mixed structure of the multi-di...

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Problems solved by technology

Reducing the energy barrier and preventing quenching of excited electrons and holes remains challenging

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