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

A kind of preparation method of zno/zngano two-phase composite structure photocatalytic powder

A composite structure and photocatalytic technology, applied in the field of photocatalytic materials, can solve the problems of affecting the absorption of visible light, hindering the redox reaction of photogenerated carriers, and affecting the migration of photogenerated carriers, so as to achieve difficult compounding, short preparation time and low cost low effect

Active Publication Date: 2017-11-10
XIAMEN UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The interior of the ZnGaNO solid solution prepared by increasing the pH method is porous, which affects the migration of photogenerated carriers inside the solid solution; in addition, the surface of the ZnGaNO solid solution prepared by increasing the pH method often has ZnGa 2 o 4 Impurities such as ZnGaNO affect the absorption of visible light and prevent photogenerated carriers from contacting with the solution to participate in the oxidation-reduction reaction.

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
  • A kind of preparation method of zno/zngano two-phase composite structure photocatalytic powder
  • A kind of preparation method of zno/zngano two-phase composite structure photocatalytic powder
  • A kind of preparation method of zno/zngano two-phase composite structure photocatalytic powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: Preparation of ZnO / ZnGaNO two-phase composite structure powder

[0047] (1) 12 grams of Ga(NO 3 ) 3 9H 2 O and 12 g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100mL of aqueous solution, and then the mixed metal solution of gallium and zinc was quickly poured into 70mL of 1mol / L Na 2 CO 3 In the solution, stir constantly at the same time, the mixing speed is 30mL / s, and the stirring speed is 1500rpm, and a white precipitate is obtained; when all the metal solution is poured, the pH of the mixed solution is adjusted to 8 with 2mol / L NaOH solution;

[0048] (2) Put the obtained mixed solution in a water bath at 80° C. for 12 hours while keeping constant stirring.

[0049] (3) centrifuging the precipitate and washing it with deionized water, repeated three times; drying the centrifuged precipitate at 80° C. for 12 hours to obtain a white solid;

[0050] (4) The precursor was obtained by grinding the white solid into powder with an agate mortar. Put the p...

Embodiment 2

[0059] Embodiment 2: Preparation of ZnO / ZnGaNO two-phase composite structure powder

[0060] (1) 12 grams of Ga(NO 3 ) 3 9H 2 O and 17.82 g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of aqueous solution, then the mixed metal solution of gallium and zinc was poured into 70 mL of 1M Na 2 CO 3In the solution, the mixing speed is 10mL / s, and the stirring speed is 1000rpm; when all the metal solution is poured, adjust the pH of the mixed solution to 7 with 2M NaOH solution;

[0061] (2) Put the obtained mixed solution in a water bath at 80° C. for 12 hours while keeping constant stirring.

[0062] (3) centrifuging the precipitate and washing it with deionized water, repeated three times; drying the centrifuged precipitate at 80° C. for 12 hours to obtain a white solid;

[0063] (4) The precursor was obtained by grinding the white solid into powder with an agate mortar. Put the precursor into a high-temperature energy-saving tube furnace for sintering at 800°C and react...

Embodiment 3

[0064] Embodiment 3: Preparation of ZnO / ZnGaNO two-phase composite structure powder

[0065] (1) 2 grams of Ga(NO 3 ) 3 9H 2 O and 7.4 g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of aqueous solution, then the mixed metal solution of gallium and zinc was poured into 75 mL of 0.1 M Na 2 CO 3 In the solution, the mixing speed is 1mL / s, and the stirring speed is 500rpm; when all the metal solution is poured, adjust the pH of the mixed solution to 9 with 2M NaOH solution;

[0066] (2) Put the obtained mixed solution in a water bath at 80° C. for 12 hours while keeping constant stirring.

[0067] (3) centrifuging the precipitate and washing it with deionized water, repeated three times; drying the centrifuged precipitate at 80° C. for 12 hours to obtain a white solid;

[0068] (4) The precursor was obtained by grinding the white solid into powder with an agate mortar. Put the precursor into a high-temperature energy-saving tube furnace for sintering at 800°C and react wit...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of ZnO / ZnGaNO two-phase composite structure photocatalytic powder. A hydroxide precursor containing Zn ions and Ga ions was prepared in an aqueous solution by co-deposition method with lower pH value, and then the precursor was nitrided at high temperature to obtain ZnO nanosheets inside and ZnGaNO solid solution nanoparticles on the surface. Composite structure powder. The powder has high photocatalytic degradation efficiency for methylene blue aqueous solution under visible light and strong decolorization ability. The process of the invention is simple, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a preparation method of ZnO / ZnGaNO two-phase composite structure photocatalytic powder. Background technique [0002] Worldwide environmental pollution and ecological damage have caused people to pay great attention to high-efficiency, energy-saving, and non-secondary pollution environmental governance technologies. In recent years, photocatalytic oxidation technology has shown broad application prospects as a treatment method for toxic or refractory organic pollutants. The basic principle of photocatalytic technology is: when the semiconductor photocatalyst is subjected to energy greater than the forbidden band width (E g ) light irradiation, the electrode on its valence band (e － ) is excited, crosses the forbidden band and enters the conduction band, leaving a positively charged hole (h + ). Photogenerated holes are extremely oxidizing and can directly oxidize organ...

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 Patents(China)
IPC IPC(8): B01J27/24
Inventor 胡艳玲郑贤庭杨豪斌徐桂焰林楠杨游煌陈国滨
Owner XIAMEN UNIV OF TECH