Preparation method of molybdenum oxide nanofiber paper containing pd quantum dot modification

A technology of nanofibers and quantum dots, which is applied in the field of molybdenum oxide nanofiber paper preparation, can solve problems such as the production method of molybdenum oxide nanofiber paper, and achieve the effects of short response time, small initial resistance, and improved sensitivity

Active Publication Date: 2018-06-29
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the technical scheme of this invention, the molybdenum oxide nanofiber paper containing Pd quantum dot modification and its preparation method are not proposed

Method used

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  • Preparation method of molybdenum oxide nanofiber paper containing pd quantum dot modification
  • Preparation method of molybdenum oxide nanofiber paper containing pd quantum dot modification
  • Preparation method of molybdenum oxide nanofiber paper containing pd quantum dot modification

Examples

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Effect test

Embodiment 1

[0038] A method for preparing molybdenum oxide nanofiber paper modified with Pd quantum dots, said method comprising the steps of:

[0039] (1) Dissolve 2.42g of sodium molybdate dihydrate in 30.0ml of deionized water to obtain a sodium molybdate solution, and then add dropwise 6.25ml of a concentrated solution with a concentration of 70% and a purity greater than 99% to the sodium molybdate solution. Nitric acid, magnetically stirred for 30 minutes under sealed conditions, and obtained solution A after stirring evenly;

[0040] (2) Under normal temperature and pressure conditions, dissolve 150.0ml of absolute ethanol in 1350.0ml of deionized water, and stir magnetically for 15 minutes under sealed conditions. After stirring evenly, a mixed solution B of alcohol and deionized water is obtained;

[0041] (3) Under normal temperature and pressure conditions, transfer the solution A obtained in step (1) to a clean polytetrafluoroethylene reactor, then place the reactor in an electr...

Embodiment 2

[0047] The difference between the preparation method of molybdenum oxide nanofiber paper modified with Pd quantum dots in this example and Example 1 is that the temperature in the drying oven in step (3) of this example is 260 ° C, and the molybdenum oxide nanofiber paper in step (6) The drying temperature of the fiber paper was 80° C., and the other conditions were the same as in Example 1 to prepare the molybdenum oxide nanofiber paper modified with Pd quantum dots.

[0048] The SEM image of the molybdenum oxide nanofiber paper modified with Pd quantum dots prepared in this example image 3 As shown, the actual picture is as figure 2 shown.

Embodiment 3

[0050] A method for preparing molybdenum oxide nanofiber paper modified with Pd quantum dots, said method comprising the steps of:

[0051] (1) Dissolve 2.42g of sodium molybdate dihydrate in 30.0ml of deionized water to obtain a sodium molybdate solution, and then add dropwise 15.0ml of sodium molybdate solution with a concentration of 70% and a purity greater than 99%. Concentrated nitric acid, stirred magnetically for 30 minutes under sealed conditions, and obtained solution A after stirring evenly;

[0052] (2) Under normal temperature and pressure conditions, dissolve 150.0ml of absolute ethanol in 1350.0ml of deionized water, and stir magnetically for 15 minutes under sealed conditions. After stirring evenly, a mixed solution B of alcohol and deionized water is obtained;

[0053] (3) Under normal temperature and pressure conditions, transfer the solution A obtained in step (1) to a clean polytetrafluoroethylene reactor, then place the reactor in an electric blast drying ...

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Abstract

The invention discloses a preparation method of Pd quantum dot modified molybdenum oxide nanofiber paper, which is exclusively used for preparing a hydrogen-sensitive element in a high-performance hydrogen sensor with fast response ability at normal temperature and is an improvement based on Molybdenum Oxide Nanofiber Paper and Preparation Method thereof (CN104909407B). The preparation method is characterized by uniformly adding 0.013-0.034 weight parts of Pd quantum dots into the suspension D in a process of stirring a suspension D in the step (5); in a process of preparing a hydrogen-sensitive element of a hydrogen sensor by use of the nanofiber paper, in an environment with relatively low hydrogen concentration, initial resistance is lower, the response time and recovery time of the sensor are shorter while the sensitivity is high, and the performance is stable at normal temperature while recycling can be realized; and the integrated hydrogen-sensitive element also can be conveniently integrated in various flexible circuits. The preparation method disclosed by the invention has the advantages of simple technology, low energy consumption and pollution-free preparation process.

Description

technical field [0001] The invention relates to a method for preparing molybdenum oxide nanofiber paper modified with Pd quantum dots, and belongs to the technical field of inorganic nano functional materials. Background technique [0002] As an efficient and clean fuel, reducing gas, and carrier gas, hydrogen has been widely used in many fields such as medical treatment, medicine, petrochemical, and metallurgy. However, hydrogen is a colorless, odorless, small molecular weight, flammable and explosive gas. During production, transportation and use, hydrogen leakage is very easy to occur and diffuses quickly, and it is difficult to be detected by human senses. High sensitivity must be used The detection device realizes hydrogen leakage detection quickly, safely and reliably. Existing hydrogen sensors based on bubble test, catalytic combustion, mass spectrometer detection, electrochemical method, ultrasonic method, etc. all have disadvantages such as low safety and poor dete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G39/02
Inventor 胡永明游开开罗显涛王钊顾豪爽
Owner HUBEI UNIV
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