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Hierarchical titanium dioxide microspheres based on surface oriented growth nano-rods and preparation method thereof

A titanium dioxide, directional growth technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of unsuitability for large-scale production, low degree of crystallization, poor reproducibility, etc., and achieve good self-settling Performance, good light scattering, excellent performance effects

Inactive Publication Date: 2015-08-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graded titanium dioxide materials reported in the literature are often not highly crystallized, with low yield and poor reproducibility, and are not suitable for large-scale production.

Method used

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  • Hierarchical titanium dioxide microspheres based on surface oriented growth nano-rods and preparation method thereof
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  • Hierarchical titanium dioxide microspheres based on surface oriented growth nano-rods and preparation method thereof

Examples

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Embodiment 1

[0040] A preparation method of graded titanium dioxide microspheres based on surface oriented growth nanorods, comprising the following steps:

[0041] (1) Under the condition of room temperature and constant stirring, the stirring rate is 2000 rpm, and the molar ratio of resorcinol and formaldehyde is 1:8, which are dissolved in water successively, and the amount of water is controlled so that the mass concentration of resorcinol is 1.5%, to get a mixed solution;

[0042] (2) Add titanium trichloride solution dropwise to the resulting mixed solution until the molar ratio of titanium trichloride and resorcinol is 1:8 to obtain a reaction solution; the titanium trichloride solution is dissolved in 3wt % titanium trichloride solution in the hydrochloric acid solution, the concentration of titanium trichloride is 1.5mol / L;

[0043] (3) Transfer the obtained reaction solution into an airtight container, and place it in a constant temperature water bath at 90°C for 2 hours to reac...

Embodiment 2

[0051] A preparation method of graded titanium dioxide microspheres based on surface oriented growth nanorods, comprising the following steps:

[0052] (1) Under the condition of room temperature and constant stirring, the stirring rate is 500 rpm, and resorcinol and formaldehyde are dissolved in water in a molar ratio of 1:2 in sequence, and the amount of water is controlled so that the mass concentration of resorcinol is 3%, to get a mixed solution;

[0053] (2) Add titanium trichloride solution dropwise to the obtained mixed solution until the molar ratio of titanium trichloride and resorcinol is 1:2 to obtain a reaction solution; the titanium trichloride solution is dissolved in 3wt % titanium trichloride solution in hydrochloric acid solution, the concentration of titanium trichloride is 0.1mol / L;

[0054] (3) Transfer the obtained reaction solution into an airtight container, and place it in a constant temperature water bath at 70°C for 4 hours to react to form a dark r...

Embodiment 3

[0057] A preparation method of graded titanium dioxide microspheres based on surface oriented growth nanorods, comprising the following steps:

[0058] (1) Under the condition of room temperature and constant stirring, the stirring rate is 1000 rev / min, and resorcinol and formaldehyde are dissolved in water in a molar ratio of 1:2 in turn, and the amount of water is controlled so that the mass concentration of resorcinol is 3%, to get a mixed solution;

[0059] (2) Add titanium trichloride solution dropwise to the obtained mixed solution until the molar ratio of titanium trichloride and resorcinol is 1:2 to obtain a reaction solution; the titanium trichloride solution is dissolved in 3wt % titanium trichloride solution in hydrochloric acid solution, the concentration of titanium trichloride is 0.5mol / L;

[0060] (3) Transfer the obtained reaction solution into an airtight container, and place it in a constant temperature water bath at 50°C for 6 hours to generate a dark red g...

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Abstract

The invention relates to hierarchical titanium dioxide microspheres based on surface oriented growth nano-rods and a preparation method thereof. The hierarchical titanium dioxide microspheres are three-dimensional microspheres formed by a cluster of one-dimensional nano-rods which own a common core and grow uniformly and outwards in a radiation manner along the core. The preparation method comprises the following main steps of: adding a titanium precursor in a polycondensation reaction process of resorcinol-formaldehyde, then preparing organic gel in a sol-gel process, and finally carrying out high-temperature carbonization to obtain the titanium dioxide nano-rod microspheres with hierarchical structures. The hierarchical titanium dioxide microspheres based on the surface oriented growth nano-rods, prepared by the method, have a good adsorption performance and a good pollutant photocatalytic degradation performance; and after being used, the hierarchical titanium dioxide microspheres based on the surface oriented growth nano-rods are separated from water simply and conveniently, thus easily realizing the recycling and reusing of photocatalytic materials. In addition, the preparation method is simple in technology, the mass production is easily realized by adopting the preparation method, the appearance and size of the products are controllable, and the products are high in crystalline of degree and conform to practical production application requirements.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a graded titanium dioxide microsphere based on surface oriented growth of nanorods and a preparation method thereof. Background technique [0002] In recent years, environmental pollution has become a serious problem that threatens human existence, and photocatalytic oxidation technology is widely accepted by academics because it can non-selectively mineralize almost all organic pollutants, quickly kill most pathogenic microorganisms, and has no secondary pollution. The extensive attention of the world and industry. Among many photocatalytic materials, titanium dioxide has been the most widely used photocatalyst due to its excellent photocatalytic activity, stability and low price. It is widely used in water treatment, air purification, antibacterial, deodorization and other fields application. However, from the perspective of practical application, the photocatalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06B82Y40/00
Inventor 徐世平李文乾王焰刘传旸王麒皓
Owner SHANDONG UNIV
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