A kind of preparation method of octahedral cuprous oxide crystal at room temperature crystallization

Abstract

The invention provides octahedron cuprous oxide crystal and a normal-temperature crystallization preparation method thereof. The normal-temperature crystallization preparation method comprises the following steps: by taking copper acetate as a copper source and tartaric acid as a reducing agent, adding the two components into a proper amount of 0.1-3.0M acetic acid / sodium acetate buffer solution with the pH value of 3.0-6.5, stirring, simultaneously adding 1-20ml of a 0.1-3M / L potassium carbonate solution, stirring for 3-9 hours at the room temperature, filtering, and leaving to stand and evaporate for 1-30 days at the room temperature by using a normal-temperature crystallization preparation technique, thereby obtaining the octahedron cuprous oxide crystal. The preparation method of the cuprous oxide crystal of an octahedron structure, which is provided by the invention, is simple and feasible and has energy-saving and environment-friendly effects, raw materials are easy to obtain and low in price, the crystal is regular in crystal morphology, uniform to disperse and high in purity, and the prepared cuprous oxide crystal has wide application prospects in fields such as semiconductor materials, gas sensitive materials and photocatalysis.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional crystal materials, in particular to a method for preparing octahedral cuprous oxide crystals at room temperature. Background technique [0002] Cuprous oxide is a p-type semiconductor material with a bandgap of about 2.17eV. It has special optical and magnetic properties. It is widely used in magnetic storage devices, superconductors, solar cells, CO catalysts, photocatalysis, and negative electrode materials for lithium batteries. Wide application prospects have become the research focus of domestic and foreign researchers. Cu 2 The physical and chemical properties of O are determined to a certain extent by its morphology and structure, and the morphology and structure of products obtained by different synthesis methods are different. Therefore, how to synthesize micro-nano Cu with controllable morphology and structure 2 O has become a research focus. [0003] Chinese patent (CN10...

AI Technical Summary

Problems solved by technology

Although the present invention has the characteristics of easy-to-obtain raw materials, simple process, high yield, and no pollution, the preparation process needs to be in a high-pressure reactor, and the safety problem needs to be solved. The reaction at 90-220 ° C for at least 4 hours increases energy consumption.

[0004] Chinese patent (CN102618925A) discloses a preparation method of cuprous oxide nano-octahedral material. The patented technology uses copper lactate as the copper source, and after the preparation of the basic solution, the pH adjustment of the basic solution, the treatment of the conductive substrate and Cu 2 O nano-octahedral preparation four process steps to prepare octahedral cuprous oxide with an average size of 150nm, although this electrodeless deposition method does not require external power supply, low energy consumption, high product purity and other advantages, it solves the problem of traditional electrochemical deposition There are many problems in the process of preparing copper oxide, but the process of this method is complicated, which limits its practical application

[0005] Chinese patent (CN103172104A) discloses a preparation method of nano-cuprous oxide. The patented technology uses copper nitrate as a copper source, adds a certain amount of NaOH, and then adds a certain amount of hydrazine hydrate as a reducing agent to react for a certain period of time at room temperature to obtain Octahedral Cu 2 O nanoparticles, although this method is simple and has the advantages of low energy consumption, but hydrazine hydrate has strong toxicity, and the problem of environmental pollution needs to be solved urgently.

Images