Preparation of granular bi by a non-hydrolytic sol-gel assisted molten salt method 2 zr 2 o 7 nanomaterials approach

A nano-material, non-hydrolysis technology, applied in the field of material preparation, can solve the problems of complex processing, long cycle, high energy consumption, etc., and achieve the effect of good particle uniformity, low cost, and low energy consumption

Active Publication Date: 2017-12-05
西谱森新材料(宁波)有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the above several methods is complex, energy-consuming, and the cycle is long.

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
  • Preparation of granular bi by a non-hydrolytic sol-gel assisted molten salt method <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> nanomaterials approach
  • Preparation of granular bi by a non-hydrolytic sol-gel assisted molten salt method <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> nanomaterials approach
  • Preparation of granular bi by a non-hydrolytic sol-gel assisted molten salt method <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> nanomaterials approach

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, keeping the molar ratio of Bi to Zr at 1:1. Add a certain amount of absolute ethanol, stir well, and prepare Bi(NO 3 ) 3 ·5H 2 Precursor solution A with an O concentration of 0.01 mol / L.

[0026] 2) Put the precursor solution A in a polytetrafluoroethylene-lined hydrothermal kettle, control the volume filling ratio to 20%, then place the reaction kettle in a homogeneous reactor, control the temperature at 100°C, and react for 4 hours to obtain wet gel B.

[0027]3) The obtained wet gel B was placed in a vacuum drying oven, and the temperature was controlled to dry at 60° C. for 180 minutes to obtain powder C.

[0028] 4) Mix powder C with sodium nitrate as a molten salt (the mass ratio of powder C to sodium nitrate is 1:2), place in a muffle furnace, heat-treat at 350°C for 8 hours, and add deionized Centrifuge water and absolute ethanol for 3 to 5 times to obtain granular Bi ...

Embodiment 2

[0030] 1) Weigh analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, keeping the molar ratio of Bi to Zr at 1:1. Add a certain amount of absolute ethanol, stir well, and prepare Bi(NO 3 ) 3 ·5H 2 Precursor solution A with an O concentration of 0.02 mol / L.

[0031] 2) Put the precursor solution A in a polytetrafluoroethylene-lined hydrothermal kettle, control the volume filling ratio to 30%, then place the reaction kettle in a homogeneous reactor, control the temperature at 80°C, and react for 8 hours to obtain wet gel B.

[0032] 3) The obtained wet gel B was placed in a vacuum drying oven, and the temperature was controlled to dry at 60° C. for 180 minutes to obtain powder C.

[0033] 4) Mix powder C with sodium nitrate as a molten salt (mass ratio of powder C to sodium nitrate is 1:2), place in a muffle furnace, heat treat at 450°C for 6 hours, add deionized Centrifuge water and absolute ethanol for 3 to 5 times to obtain granular Bi 2 Zr 2...

Embodiment 3

[0035] 1) Weigh analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, keeping the molar ratio of Bi to Zr at 1:1. Add a certain amount of absolute ethanol, stir well, and prepare Bi(NO 3 ) 3 ·5H 2 Precursor solution A with an O concentration of 0.05 mol / L.

[0036] 2) Put the precursor solution A in a polytetrafluoroethylene-lined hydrothermal kettle, control the volume filling ratio to 30%, then place the reaction kettle in a homogeneous reactor, control the temperature at 90°C, and react for 6 hours to obtain wet gel B.

[0037] 3) The obtained wet gel B was placed in a vacuum drying oven, and the temperature was controlled to dry at 60° C. for 240 minutes to obtain powder C.

[0038] 4) Mix powder C with sodium nitrate as a molten salt (mass ratio of powder C to sodium nitrate is 1:2), place in a muffle furnace, heat treat at 550°C for 4 hours, add deionized Centrifuge water and absolute ethanol for 3 to 5 times to obtain granular Bi 2 Zr 2...

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

No PUM Login to View More

Abstract

A non-hydrolytic sol-gel-assisted molten salt method for the preparation of granular Bi 2 Zr 2 O 7 Nanomaterials method, Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O is added to absolute ethanol to prepare Bi(NO 3 ) 3 ·5H 2 Precursor A with an O concentration of 0.01 to 0.50 mol / L, in which the molar ratio of Bi to Zr is 1:1; place the precursor A in a hydrothermal kettle, and then react at 80 to 120°C for 4 to 10 hours to obtain Wet gel B is dried, mixed with molten salt, heat treated at 350°C to 650°C for 1 to 8 hours, and centrifuged to obtain granular Bi 2 Zr 2 O 7 Nanomaterials; this method has simple and easy operation, short preparation cycle, low cost, and low energy consumption; the product prepared by the invention is granular, has good product dispersion, high crystallinity, and has high degradation of rhodamine B efficiency.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a non-hydrolytic sol-gel assisted molten salt method for preparing granular Bi 2 Zr 2 o 7 methods for nanomaterials. Background technique [0002] Bismuth zirconate (Bi 2 Zr 2 o 7 ) belongs to the cubic center system, belongs to the Fd3m space group structure, and belongs to the pyrochlore-type composite oxide. Pyrochlore-type composite oxides are a new type of inorganic composite materials with various physical and chemical properties such as ion conductivity, ferroelectricity, ferromagnetism, and catalysis. They have become research hotspots in the fields of solid-state physics, materials chemistry, and catalytic chemistry. Especially its photocatalytic performance has been paid more and more attention by people. [Tang Xinde, Ye Hongqi, et al. Structure, preparation and photocatalytic properties of pyrochlore-type composite oxides[J]. Progress in Chemistry, 2009, 21(1...

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 & AuthorityPatents(China)
IPC IPC(8): C01G29/00B01J23/18
CPCC01G29/00B01J23/18B01J37/0009C01P2004/62C01P2004/03C01P2002/72B01J35/39
Inventor曹丽云罗艺佳周磊黄剑锋吴建鹏
Owner西谱森新材料(宁波)有限公司