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General synthesis method of tantalum pentoxide photocatalytic material with three-dimensional ordered network structure

A technology with network structure and three-dimensional order, which is applied in tantalum compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high carrier recombination rate and low specific surface area , to achieve the effects of reducing barriers, high porosity, and improving light utilization

Active Publication Date: 2021-07-06
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved it 2 o 5 The low specific surface area and high carrier recombination rate of semiconductor catalysts in photocatalytic water splitting have greatly improved the efficiency of photocatalytic hydrogen production

Method used

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  • General synthesis method of tantalum pentoxide photocatalytic material with three-dimensional ordered network structure
  • General synthesis method of tantalum pentoxide photocatalytic material with three-dimensional ordered network structure
  • General synthesis method of tantalum pentoxide photocatalytic material with three-dimensional ordered network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, take TaCl 5 (1.7g) was added to anhydrous ethanol (22mL) solution and stirred to dissolve, and impurities were filtered out, and then 4g of PMMA pellet template was added to the filtrate, left to stand for 8h, and vacuum filtered to obtain PMMA containing tantalum ethoxide in the gap. It was then placed in a tube furnace, fed with nitrogen, heated to 573K, and kept for 2 hours, and then taken out after cooling down to room temperature. Next, place it in a muffle furnace, raise the temperature to 973K, and keep it for 2h. Get a three-dimensional ordered network structure Ta 2 o 5 .

Embodiment 2

[0035] First, take TaCl 5 (1.8g) was added to anhydrous ethanol (20mL) solution and stirred to dissolve, and impurities were filtered out, and then 7g of PMMA pellet template was added to the filtrate, left to stand for 8h, and vacuum filtered to obtain PMMA containing tantalum ethoxide in the gap. It was then placed in a tube furnace, fed with nitrogen, heated to 573K, and kept for 2 hours, and then taken out after cooling down to room temperature. Next, place it in a muffle furnace, raise the temperature to 973K, and keep it for 1h. Get a three-dimensional ordered network structure Ta 2 o 5 .

Embodiment 3

[0037] First, take TaCl 5(2g) was added into anhydrous ethanol (25mL) solution and stirred to dissolve, and impurities were filtered out, and then 4g of PMMA pellet template was added to the filtrate, left to stand for 8h, and vacuum filtered to obtain PMMA containing tantalum ethoxide in the gap. It was then placed in a tube furnace, fed with nitrogen, heated to 573K, and kept for 2 hours, and then taken out after cooling down to room temperature. Next, place it in a muffle furnace, raise the temperature to 973K, and keep it for 2h. Get a three-dimensional ordered network structure Ta 2 o 5 .

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Abstract

The invention relates to the field of hydrogen production by photocatalytic decomposition of water, and provides a general synthesis method of three-dimensional network tantalum pentoxide (Ta2O5). The morphology of the photocatalyst is modified, so that the specific surface area of the catalyst is increased, the carrier migration distance is shortened, the hydrogen production efficiency is improved, the problems of high carrier recombination rate and few reaction active sites of a Ta2O5 photocatalytic semiconductor are solved, and the photocatalytic hydrogen production efficiency is greatly improved. The specific preparation method comprises the following steps of: dissolving TaCl5 in an absolute ethyl alcohol solution, stirring to accelerate dissolution, filtering out impurities, then adding a proper amount of a polymethyl methacrylate (PMMA) pellet template agent, and carrying out immersion and suction filtration to obtain PMMA with tantalum ethoxide in gaps; and then placing the PMMA in a tubular furnace, curing the structure in a nitrogen atmosphere, and then placing the product in a muffle furnace for secondary calcination to remove the template agent. Ta2O5 prepared by the method has a highly ordered network structure, and can efficiently decompose water to produce hydrogen.

Description

technical field [0001] The invention relates to the field of photocatalysts, specifically a three-dimensional ordered network structure (Ta 2 o 5 ) general synthesis method for photocatalytic materials. Background technique [0002] With the rapid development of the economy, the consumption of energy is increasing. On the one hand, the shortage of fossil resources is becoming more and more serious. On the other hand, due to the increasingly serious pollution caused by the use of fossil energy, it is urgent to find clean, green and renewable energy alternatives. Hydrogen energy meets these requirements well and is more efficient than fossil energy. Using solar energy to convert water into hydrogen holds great promise. Therefore, how to efficiently split water to generate hydrogen has become an urgent problem to be solved. However, as an emerging method, photocatalysis is an efficient, green and promising technology in splitting water to generate hydrogen, and is expected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01J35/10B01J37/08C01B3/04C01G35/00
CPCB01J23/20B01J37/088B01J37/082C01B3/042C01G35/00C01P2006/12C01P2002/72C01P2002/01C01P2004/03B01J35/39B01J35/61Y02E60/36
Inventor 王学文甘蕾张荣斌
Owner NANCHANG UNIV
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