Method for preparation of bismuth-containing nano-hollow ball by using porous bismuth oxide as template

Abstract

The invention relates to a method for preparation of a bismuth-containing nano-hollow ball by using porous bismuth oxide as a template. The method includes: adding porous bismuth oxide and a precursor into deionized water to undergo reaction under hydrothermal conditions, subjecting the product to centrifugation washing to remove the residual solute, and finally carrying out drying and cooling, thus obtaining the bismuth-containing nano-hollow ball. Specifically, the dosage of the porous bismuth oxide is 0.05-0.5mmol, the dosage of the precursor is 0.15-2mmol, and the dosage of the deionized water is 5-30mL. The method provided by the invention has the advantages that: (1) great change of the shell material appearance and performance, as well as a loose and porous shell structure can be avoided; (2) the bismuth-containing nano-hollow material with uniform appearance and controllable size can be synthesized (with the size decided by the size of the porous bismuth oxide template); and (3) a hydrothermal synthesis process is employed, no surfactant or template needs to be added, the process is simple, the production cost is lowered, and large-scale production of the product can be realized.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering, functional materials and hollow nanomaterials, and in particular relates to a method for preparing bismuth-containing nano hollow spheres by using porous bismuth oxide as a template. Background technique [0002] Due to its special physical and chemical properties, bismuth-based materials are widely used in various fields such as electronic ceramic materials, electrolyte materials, photoelectric materials, sensors, microelectronic components, high-temperature superconducting materials, catalysts, ferroelectric materials, etc., and are also used in fireproof materials, High refractive index glass, nuclear engineering glass manufacturing and nuclear reactor fuel and other fields. Nano hollow spheres have the characteristics of low density, large specific surface area, good stability, surface permeability, low thermal expansion coefficient and good refractive index. At the same time, ...

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Problems solved by technology

Ma Zhanying et al. (Molecular Catalysis, 2010, 24:549-555) used air bubbles as soft templates to provide a bismuth nitrate pentahydrate and ammonium metavanadate as raw materials to synthesize bismuth vanadate hollow The ball method uses high-temperature calcination at 500°C to generate gas from ammonium nitrate and citric acid. The gas acts as a soft template and is encapsulated in bismuth vanadate to form a hollow structure. However, due to the contraction force of the aggregate at each position and the content Unbalanced resistance leads to uneven wall thickness of hollow microspheres

[0005] So far, there are no literature and patent reports on the preparation of bismuth-containing hollow nanospheres using porous bismuth oxide as a sacrificial template, and there is no technical solution that can realize the preparation of different bismuth-containing hollow nanospheres through one template.

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