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a ngqd/fe 2 o 3 /Graphene foam composite film and its preparation method and application

A graphene foam, composite film technology, applied in chemical instruments and methods, instruments, luminescent materials, etc., can solve the problems of reducing the stability and working life of gas sensors, poor repeatability, high energy consumption, etc., to improve electron transmission. Capability and gas-sensing activity, low operating temperature, the effect of reducing power consumption

Active Publication Date: 2022-05-17
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this type of gas sensor needs to consume a lot of energy when it works, and the higher operating temperature will reduce the stability and working life of the gas sensor. poor repeatability

Method used

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  • a ngqd/fe <sub>2</sub> o <sub>3</sub> /Graphene foam composite film and its preparation method and application
  • a ngqd/fe <sub>2</sub> o <sub>3</sub> /Graphene foam composite film and its preparation method and application
  • a ngqd/fe <sub>2</sub> o <sub>3</sub> /Graphene foam composite film and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Clean the nickel foam with acetone, and weld it on the sensor device, wherein the sensor device is: a silicon substrate, silicon dioxide is deposited on the silicon substrate, then a titanium layer and a platinum layer are deposited, and finally the surface is etched Platinum interdigitated electrode array, the width of each platinum interdigitated finger is 10 μm, the length is 1 mm, the interdigital electrode spacing is 8 μm, and the overlap between interdigital fingers is 800 μm. The sensor device welded with nickel foam is placed in a tubular Furnace, 22sccm H in tube furnace 2 and 53 sccm Ar environment, and ramped up to 1000 °C at a rate of 10 °C per min, held for 50 min, and then passed through bubbling H at ambient pressure 2 / Ar gas mixture to introduce ethanol vapor into the quartz tube, after 30 min, turn off the ethanol vapor, and cool the system to room temperature, etched the nickel substrate into a three-dimensional graphene foam with deionized water ...

Embodiment 2

[0036] (1) Clean the nickel foam with acetone, and weld it on the sensor device, wherein the sensor device is: a silicon substrate, silicon dioxide is deposited on the silicon substrate, then a titanium layer and a platinum layer are deposited, and finally the surface is etched Platinum interdigitated electrode array, the width of each platinum interdigitated finger is 10 μm, the length is 1 mm, the interdigital electrode spacing is 8 μm, and the overlap between interdigital fingers is 800 μm. The sensor device welded with nickel foam is placed in a tubular Furnace, 55sccm H in tube furnace 2 and 110 sccm Ar environment, and ramped up to 1000 °C at a rate of 10 °C per min, held for 50 min, and then passed through bubbling H at ambient pressure 2 / Ar gas mixture to introduce ethanol vapor into the quartz tube, after 30 min, turn off the ethanol vapor, and cool the system to room temperature, etched the nickel substrate into a three-dimensional graphene foam with deionized water...

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Abstract

The invention discloses a NGQD / Fe 2 o 3 / Graphene foam composite film and its preparation method and application, the film includes a graphene foam substrate, iron oxide nanospheres are loaded on the graphene foam substrate, and aminated graphene quantum dots are embedded in the iron oxide nanospheres, the film’s The preparation method comprises the following steps: (1) preparing a graphene foam substrate; (2) adding aminated graphene quantum dots to the iron precursor solution, and stirring to prepare a sol solution; (3) soaking the graphene foam substrate in the sol solution Carry out pull-coating, take out and dry; (4) Post heat steaming method processing; (5) Place heat treatment under inert gas; This film can be used in butyraldehyde gas sensor as sensitive layer, and this film working temperature is low, to The gas sensitivity is high, the selectivity to butyraldehyde is high, the repeatability is good, the stability is good, the cost is low, the preparation method is simple, and large-scale production is possible.

Description

technical field [0001] The present invention relates to a composite film and its preparation method and application, more specifically, to a NGQD / Fe 2 o 3 / Graphene foam composite film and its preparation method and application. Background technique [0002] Butyraldehyde is a common volatile organic compound. Elevated levels of butyraldehyde in exhaled breath indicate damage to the central nervous system of the human body, or even cancer. Butyraldehyde has been listed as a "carcinogen" by the International Agency for Research on Cancer. At present, there are many detection methods for butyraldehyde, mainly including chromatography, polarography, spectroscopy, and sensor methods, each of which has its own characteristics. Although the colorimetric method is simple and low in cost, its sensitivity is not high, its selectivity is not good, the sampling period is long, and it cannot respond quickly to the rapid fluctuation of butyraldehyde concentration. Chromatography and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12C09K11/65C09K11/02B82Y40/00B82Y20/00
CPCG01N27/127C09K11/65C09K11/025B82Y20/00B82Y40/00
Inventor 邵绍峰林纪栋夏雨萱刘星宇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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