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

A kind of tungsten trioxide porous nanorod rich in oxygen vacancies, catalytic system and its preparation method and application

A tungsten trioxide, catalytic system technology, applied in tungsten oxide/tungsten hydroxide, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low photothermal conversion efficiency and stability, and is not suitable for photothermal conversion materials. , emission of large greenhouse gases, etc., to achieve the effect of high light-to-heat conversion efficiency, abundant reserves, and accelerated transfer and transmission

Active Publication Date: 2022-03-29
TIANJIN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, multi-stage flash lamp distillation and reverse osmosis process, as common seawater desalination methods, have the disadvantages of consuming a large amount of electric energy and emitting a large amount of greenhouse gases. Thermal materials emerge in endlessly, but often have low photothermal conversion efficiency and stability. For transition metal oxides, due to their large band gaps, they are not suitable for photothermal conversion materials. Therefore, the development of new It is particularly important to prepare transition metal oxides containing oxygen vacancies to narrow their band gaps

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 tungsten trioxide porous nanorod rich in oxygen vacancies, catalytic system and its preparation method and application
  • A kind of tungsten trioxide porous nanorod rich in oxygen vacancies, catalytic system and its preparation method and application
  • A kind of tungsten trioxide porous nanorod rich in oxygen vacancies, catalytic system and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] Step 1: Weigh 0.4g of commercial tungsten trioxide, disperse it into 12ml of ethylenediamine under strong stirring, and transfer it to a 15ml Teflon-lined stainless steel autoclave, and then place it in an oven at 180°C Reacted in the medium for 8h, and naturally cooled to room temperature, the product was transferred from the reaction kettle to a centrifuge tube for centrifugation, washed with water and ethanol for 3 times, and then dried in a vacuum oven at 40°C for 12 hours, and the dried The product was placed in a quartz tube and raised to 700°C at a rate of 1°C / min. After a constant temperature of 5 hours, the temperature was naturally lowered. The obtained yellow powder was yellow tungsten trioxide porous nanorods;

[0040] Step 2: Place the yellow tungsten trioxide porous nanorods obtained in step 1 in a quartz tube, and wash the quartz tube with ammonia gas for 30 minutes to obtain an inert environment, and then heat up to 400°C, keep the temperature for 2 hour...

Embodiment 2

[0044] Step 1: Weigh 0.8g of commercial tungsten trioxide, disperse it into 24ml of ethylenediamine under strong stirring, and transfer it to a 30ml Teflon-lined stainless steel autoclave, and then place it in an oven at 180°C Reacted in the medium for 8h, and naturally cooled to room temperature, the product was transferred from the reaction kettle to a centrifuge tube for centrifugation, washed with water and ethanol for 3 times, and then dried in a vacuum oven at 40°C for 12 hours, and the dried The product was placed in a quartz tube and raised to 700°C at a rate of 1°C / min, then cooled down naturally after a constant temperature of 5 hours, and the obtained yellow powder was yellow tungsten trioxide porous nanorods;

[0045] Step 2: Place the yellow tungsten trioxide porous nanorods obtained in step 1 in a quartz tube, and wash the quartz tube with ammonia gas for 30 minutes to obtain an inert environment, and then heat up to 400°C, keep the temperature for 2 hours and th...

Embodiment 3

[0049] Step 1: Weigh 0.4g of commercial tungsten trioxide, disperse it into 12ml of ethylenediamine under strong stirring, and transfer it to a 15ml Teflon-lined stainless steel autoclave, and then place it in an oven at 180°C Reacted in the medium for 8h, and naturally cooled to room temperature, the product was transferred from the reaction kettle to a centrifuge tube for centrifugation, washed with water and ethanol for 3 times, and then dried in a vacuum oven at 40°C for 12 hours, and the dried The product was placed in a quartz tube and raised to 700°C at a rate of 1°C / min, then cooled down naturally after a constant temperature of 5 hours, and the obtained yellow powder was yellow tungsten trioxide porous nanorods;

[0050] Step 2: Place the yellow tungsten trioxide porous nanorods obtained in step 1 in a quartz tube, and wash the quartz tube with ammonia gas for 30 minutes to obtain an inert environment, and then heat up to 500°C, keep the temperature for 2 hours and th...

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
lengthaaaaaaaaaa
pore sizeaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a tungsten trioxide porous nanorod rich in oxygen vacancies, a catalytic system and its preparation method and application. The tungsten trioxide porous nanorod is placed in an ammonia atmosphere at a heating rate of 1-5°C / min. After heating up to 400-500° C., calcining for 1-3 hours, and cooling down naturally to obtain porous nanorods of tungsten trioxide rich in oxygen vacancies. Black WO 3‑x Porous nanorods contain oxygen vacancies, have a smaller band gap, and have a stable structure. The porous structure and a large number of oxygen vacancies can accelerate the transfer and transmission of photogenerated charge carriers, and have better performance in photothermal water evaporation.

Description

technical field [0001] The invention relates to the technical field of transition metal oxide nanomaterials, in particular to a porous tungsten trioxide nanorod rich in oxygen vacancies, a preparation method and application thereof. Background technique [0002] Due to the good stability, abundant reserves, easy preparation and environmental friendliness of transition metal oxides, transition metal oxides are widely used in the electrolysis of water for hydrogen production, oxygen production, oxygen reduction, and carbon dioxide reduction. However, some potential applications of transition metal oxides are limited due to their insufficient conductivity and large band gaps. In recent years, there has been great interest in transition metal oxide nanostructures containing oxygen vacancies because oxygen vacancies can effectively tune the electronic structure, electrical conductivity, band gap size, and catalytic performance of materials. However, a facile and general method f...

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): C01G41/02B82Y40/00B01J31/34
CPCC01G41/02B82Y40/00B01J31/34C01P2004/16C01P2004/03C01P2004/04C01P2002/72C01P2006/17
Inventor 张兵赵博航刘大李信雅妮纪岩
Owner TIANJIN UNIV