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

A kind of α-fe2o3 powder with plate-like structure and preparation method thereof

A -fe2o3, plate-like technology, applied in the field of α-Fe2O3 powder with irregular plate-like structure and its preparation, can solve the problems of few photocatalysts, α-Fe has not yet been seen, etc., and achieves short reaction time and easy operation. , the effect of simple process

Active Publication Date: 2018-09-18
SHAANXI UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current research on Fe with nanoplate shape 2 o 3 There are still relatively few reports on photocatalysts, especially α-Fe with a plate-like structure that has not been prepared by microwave hydrothermal method. 2 o 3 powder report

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 α-fe2o3 powder with plate-like structure and preparation method thereof
  • A kind of α-fe2o3 powder with plate-like structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Fe(NO 3 ) 3 9H 2 O is dissolved in deionized water to give Fe 3+ Fe solution with a concentration of 0.5mol / L;

[0026] Step 2: Add the NaOH solution with a concentration of 4mol / L into the Fe solution, mix well, and obtain the precursor solution, wherein Na + with Fe 3+ The molar ratio is 80:1;

[0027] Step 3: Pour the precursor solution into the microwave hydrothermal reaction kettle, place the microwave hydrothermal reaction kettle in the microwave-assisted hydrothermal synthesis instrument, set the power to 300W, and conduct a microwave hydrothermal reaction at 180°C for 30 minutes;

[0028] Step 4: After the reaction is completed, cool to room temperature, take out the precipitate in the microwave hydrothermal reaction kettle, and dry at 80°C for 10 hours to obtain α-Fe with a plate-like structure 2 o 3 Powder.

Embodiment 2

[0030] Step 1: Fe(NO 3 ) 3 9H 2 O is dissolved in deionized water to give Fe 3+ Fe solution with a concentration of 0.3mol / L;

[0031] Step 2: Add the NaOH solution with a concentration of 3mol / L to the Fe solution and mix well to obtain a precursor solution, in which NaOH + with Fe 3+ The molar ratio is 60:1;

[0032] Step 3: Pour the precursor solution into the microwave hydrothermal reaction kettle, place the microwave hydrothermal reaction kettle in the microwave-assisted hydrothermal synthesis instrument, set the power to 280W, and conduct microwave hydrothermal reaction at 170°C for 50 minutes;

[0033] Step 4: After the reaction is completed, cool to room temperature, take out the precipitate in the microwave hydrothermal reaction kettle, and dry it at 70°C for 12 hours to obtain α-Fe with a plate-like structure 2 o 3 Powder.

Embodiment 3

[0035] Step 1: Fe(NO 3 ) 3 9H 2 O is dissolved in deionized water to give Fe 3+ Fe solution with a concentration of 0.4mol / L;

[0036] Step 2: Add the NaOH solution with a concentration of 3.5mol / L into the Fe solution, mix well to obtain a precursor solution, in which NaOH + with Fe 3+ The molar ratio is 70:1;

[0037] Step 3: Pour the precursor liquid into the microwave hydrothermal reaction kettle, place the microwave hydrothermal reaction kettle in the microwave-assisted hydrothermal synthesis instrument, set the power to 290W, and conduct microwave hydrothermal reaction at 190°C for 35 minutes;

[0038] Step 4: After the reaction is completed, cool to room temperature, take out the precipitate in the microwave hydrothermal reaction kettle, and dry it at 90°C for 8 hours to obtain α-Fe with a plate-like structure 2 o 3 Powder.

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
sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses alpha-Fe2O3 powder of a plate-shaped structure and a preparation method of the alpha-Fe2O3 powder. According to the method, with a Fe(NO3)3.9H2O as an iron source and NaOH as mineralizer, the alpha-Fe2O3 powder of the nanoplate-shaped structure is synthesized through one step in a microwave hydrothermal method. The method is simple in process, easy to operate, short in reaction time and mild in reaction condition, the synthesized alpha-Fe2O3 powder is in the shape of a nanometer irregular polygon-shaped plate and a quasi-circular plate, the spatial structure group is R-3c, and the crystal type is a cubic phase. The invention provides a new method for preparing alpha-Fe2O3 in the nanoplate-shaped structure, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to an α-Fe with an irregular plate structure 2 o 3 Powder and its preparation method. Background technique [0002] α-Fe 2 o 3 Iron oxide for short, commonly known as hematite, is a common iron oxide. As an oxide with abundant reserves and environmental friendliness, it has application prospects in many important fields. [0003] Iron oxide has a band gap of 2.2eV and is an important n-type semiconductor material. Fe 2 o 3 The bandgap width is narrow (2.0-2.2eV), it has the advantages of stable properties, rich sources, low cost, etc., it has high visible light activity, and can absorb most of the visible light. The development potential of semiconductor photocatalytic materials. Due to α-Fe 2 o 3 It is very stable at room temperature, has the advantages of low synthesis cost, strong corrosion resistance, and little environmental pollution. And nano-sized α-Fe 2 o 3 ...

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): C01G49/06B82Y40/00
CPCC01G49/06C01P2002/72C01P2004/03C01P2004/20
Inventor 谈国强刘婷赵程程任慧君夏傲
Owner SHAANXI UNIV OF SCI & TECH