Preparation method and application of Mo-doped HNb3O8 nanosheet

A nanosheet and reaction technology, applied in the field of photocatalysis, can solve the problems of large forbidden band width of pure niobate nanosheets, unsatisfactory visible light absorption, limiting the photocatalytic hydrogen production properties of niobic acid, etc., so as to reduce the recombination rate and enhance the visible light. Absorption, low cost effect

Active Publication Date: 2021-02-09
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, pure niobate nanosheets have a large bandgap and are not ideal for visible light absorption.
[0006] This greatly limits the properties of niobic acid photocatalytic hydrogen production

Method used

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  • Preparation method and application of Mo-doped HNb3O8 nanosheet
  • Preparation method and application of Mo-doped HNb3O8 nanosheet
  • Preparation method and application of Mo-doped HNb3O8 nanosheet

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Experimental program
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Effect test

Embodiment 1

[0033] The Mo-doped HNb of this embodiment 3 o 8 The preparation method of nanosheet photocatalyst material is as follows:

[0034] (1) Dissolve 3 mmoles of niobium pentachloride (0.81g) in 36ml of absolute ethanol and stir for 30-60min to dissolve completely;

[0035] (2) Add 0.0303 millimoles of molybdenum pentachloride powder to the solution as a molybdenum source. At this time, Mo:Nb is 1:99, and then ultrasonically shake for 0.5-1 hour to completely dissolve it;

[0036] (3) Add 26mL of tetramethylammonium hydroxide aqueous solution with a mass fraction of 10% dropwise to the mixed solution at a rate of 0.8mL / min to react, and stir until a clear solution is formed. At this time (molybdenum pentachloride + pentachloride Niobium chloride) and the molar ratio of tetramethylammonium hydroxide is 1:9.56;

[0037] (4) Afterwards, the obtained solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and placed in a constant temperature...

Embodiment 2

[0040] The Mo-doped HNb of this embodiment 3 o 8 The preparation method of nanosheet photocatalyst material is as follows:

[0041] (1) Dissolve 3 mmoles of niobium pentachloride (0.81g) in 36ml of absolute ethanol and stir for 30-60min to dissolve completely;

[0042] (2) Add 0.158 millimoles of molybdenum pentachloride powder to the solution. At this time, Mo:Nb is 1:19, and then ultrasonically shake for 0.5-1 hour to completely dissolve it;

[0043](3) Add 26mL of tetraethylammonium hydroxide aqueous solution with a mass fraction of 16.05% dropwise to the mixed solution at a rate of 1mL / min for reaction, and stir until a clear solution is formed. At this time (molybdenum pentachloride + pentachloride The molar ratio of niobium chloride) to tetraethyl hydroxide is 1:9.18;

[0044] (4) Afterwards, the obtained solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and placed in a constant temperature drying oven for heating reacti...

Embodiment 3

[0047] The Mo-doped HNb of this embodiment 3 o 8 The preparation method of nanosheet photocatalyst material is as follows:

[0048] (1) Dissolve 3 mmoles of niobium pentachloride (0.81g) in 36ml of absolute ethanol and stir for 30-60min to dissolve completely;

[0049] (2) Add 0.333 millimoles of molybdenum pentachloride powder to the solution. At this time, Mo:Nb is 1:9, and then ultrasonically shake for 30-60 minutes to completely dissolve it;

[0050] (3) Add 26mL of tetramethylammonium hydroxide aqueous solution with a mass fraction of 10% dropwise to the mixed solution at a rate of 0.6 mL / min to react, and stir until a clear solution is formed. At this time (molybdenum pentachloride + pentachloride Niobium chloride) and the molar ratio of tetramethylammonium hydroxide is 1:8.69;

[0051] (4) Afterwards, the obtained solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and placed in a constant temperature drying oven for heat...

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Abstract

The invention discloses a preparation method and application of a Mo-doped HNb3O8 nanosheet, and the preparation method comprises the following steps: dissolving niobium pentachloride in ethanol, adding a certain amount of molybdenum pentachloride powder into the solution, completely dissolving the mixed solution by ultrasonic treatment and oscillation, dropwise adding an aqueous solution of tetraalkylammonium into the mixed solution, and stirring at a constant speed to completely dissolve; then putting the obtained solution into a high-pressure reaction kettle for heating reaction; and cooling, washing and drying to obtain the Mo-doped HNb3O8 nanosheet. The Mo-doped HNb3O8 nanosheet material prepared by the method is used as a photocatalyst, and has the advantages of proper forbidden bandwidth, strong visible light absorption, higher hydrogen production and good cycling stability.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular, relates to a Mo-doped HNb 3 o 8 Preparation methods and applications of nanosheets. Background technique [0002] The rapid development of globalization and industrialization has brought a series of serious environmental problems to the world population. On the one hand, fossil energy sources such as oil and natural gas are becoming less and less. If new energy sources cannot be found in recent decades, human beings will face the embarrassing situation of no energy sources. On the other hand, the consumption of fossil fuels also pollutes the environment, leading to the greenhouse effect global warming and climate change. In order to solve this problem, many researchers have made great efforts. The search for new renewable sources of energy is even more urgent. [0003] Photocatalytic hydrogen production (H 2 ) technology is considered to be a potential and promising method to so...

Claims

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Application Information

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IPC IPC(8): B01J23/28B01J37/10C01B3/04
CPCB01J23/28B01J23/002B01J37/10C01B3/042B01J35/23B01J35/39Y02E60/36
Inventor 陈俊利杨新丽袁金云张永辉张智强王培远绪连彩巩飞龙邓磊
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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