Unlock instant, AI-driven research and patent intelligence for your innovation.

Gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball

A nano-silicon dioxide and titanium dioxide technology, applied in the field of photocatalysis, can solve the problems of low catalytic efficiency and fast compounding speed, and achieve the effect of high catalytic efficiency and prolong life.

Inactive Publication Date: 2014-05-28
FUZHOU UNIV
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under light conditions, titanium dioxide will generate electrons and holes with redox ability, and the electrons and holes will undergo redox reactions with the organic matter adsorbed on the surface of titanium dioxide, but the recombination speed of electrons and holes is fast, resulting in some electrons and holes. The holes have not had time to react and have been recombined, and the catalytic efficiency is low, so the suppression of the recombination of electrons and holes has become the first priority of research. The most effective way to suppress the recombination of electrons and holes is to dope metal ions in the titanium dioxide lattice. ions or non-metallic ions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball
  • Gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball
  • Gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of nano-silica spheres

[0028] At room temperature, add solution A to a 50ml Erlenmeyer flask: 4.3ml deionized water, 15ml absolute ethanol and 0.62ml ammonia water and stir for 0.5h. Then add solution B: 0.86ml tetraethyl orthosilicate and 8ml absolute ethanol to continue the reaction for 3h, centrifuge and wash to disperse the beads in 5ml absolute ethanol.

[0029] (2) Silica spheres coated with gadolinium ion-doped titanium dioxide

[0030] At room temperature, add solution C to the three-necked flask: 5ml of the silica dispersion in step (1), 15ml of absolute ethanol, 0.1g of hydroxypropyl cellulose and 0.1ml of gadolinium nitrate solution with a concentration of 0.00284mol / L and stir for 0.5 h. Then dropwise add solution D: a mixture of 1ml tetrabutyl titanate and 5ml absolute ethanol, control the rate of addition for 12 minutes, then slowly raise the temperature to 85°C, reflux at constant temperature, react for 100 minutes, and then centrifuge...

Embodiment 2

[0036] (1) Preparation of nano-silica spheres

[0037] At room temperature, add solution A to a 50ml Erlenmeyer flask: 4.3ml deionized water, 15ml absolute ethanol and 0.62ml ammonia water and stir for 0.5h. Then add solution B: 0.86ml tetraethyl orthosilicate and 8ml absolute ethanol to continue the reaction for 3h, centrifuge and wash to disperse the beads in 5ml absolute ethanol.

[0038] (2) Silica spheres coated with gadolinium ion-doped titanium dioxide

[0039] At room temperature, add solution C to the three-neck flask: 5ml of the silica dispersion in step (1), 15ml of absolute ethanol, 0.1g of hydroxypropyl cellulose and 0.1ml of gadolinium nitrate solution with a concentration of 0.00852mol / L and stir for 0.5 h. Then dropwise add solution D: a mixture of 1ml tetrabutyl titanate and 5ml absolute ethanol, control the rate of addition for 12 minutes, then slowly raise the temperature to 85°C, reflux at constant temperature, react for 100 minutes, and then centrifuge a...

Embodiment 3

[0045] (1) Preparation of nano-silica spheres

[0046] At room temperature, add solution A to a 50ml Erlenmeyer flask: 4.3ml deionized water, 15ml absolute ethanol and 0.62ml ammonia water and stir for 0.5h. Then add solution B: 0.86ml tetraethyl orthosilicate and 8ml absolute ethanol to continue the reaction for 3h, centrifuge and wash to disperse the beads in 5ml absolute ethanol.

[0047] (2) Silica spheres coated with gadolinium ion-doped titanium dioxide

[0048]At room temperature, add solution C to the three-necked flask: 5ml of the silica dispersion in step (1), 15ml of absolute ethanol, 0.1g of hydroxypropyl cellulose and 0.1ml of gadolinium nitrate solution with a concentration of 0.0142mol / L and stir for 0.5 h. Then dropwise add solution D: a mixture of 1ml tetrabutyl titanate and 5ml absolute ethanol, control the rate of addition for 12 minutes, then slowly raise the temperature to 85°C, reflux at constant temperature, react for 100 minutes, and then centrifuge a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball and a preparation method thereof, and belongs to the photocatalysis field. The preparation method takes a nano silicon dioxide ball which is synthesized by a Stober method as a template; the preparation method comprises the following steps: coating the outer side of the nano silicon dioxide ball with gadolinium-ion-doped titanium dioxide through a sol-gel method, sintering at a high temperature to convert amorphous titanium dioxide to titanium dioxide of anatase, then corroding an inner silicon dioxide core by using a sodium hydroxide solution, washing and centrifuging to obtain a gadolinium-ion-doped mesoporous hollow nano titanium dioxide ball which is high in catalytic efficiency. The titanium dioxide is made into mesoporous hollow titanium dioxide, so that the reaction specific surface area is enlarged; the doped gadolinium ions inhibit compounding between photons and cavities, thus prolonging service lives of the photons and the cavities, improving utilization rates of the photons and the cavities and improving the catalytic efficiency.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a mesoporous hollow nano titanium dioxide sphere doped with gadolinium ions and a preparation method thereof. Background technique [0002] Since 1972, two scholars Hashimoto and Fujishima of the University of Tokyo published TiO in Nature. 2 After the electrode can electrolyze water under visible light, the exploration and application of the photocatalytic mechanism of titanium dioxide has become a hot topic for researchers. [0003] After decades of research, titanium dioxide is considered to be the most valuable semiconductor oxide, and its applications involve sensors, photonic crystals, energy storage and photocatalysts. Compared with other catalysts, titanium dioxide has high photocatalytic activity, good chemical stability and low toxicity. Based on these characteristics, titanium dioxide has become the first choice in the field of photocatalysis. Under light co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/08
Inventor 郑玉婴尚鹏博林锦贤
Owner FUZHOU UNIV