Preparation method and application of palladium nano particle-modified indium oxide nanosheet composite material

A palladium nanoparticle and composite material technology, which is applied in the field of ultra-thin indium oxide nanosheet composite material and its preparation, can solve the problems of inability to perform real-time on-site monitoring, poor detection sensitivity and selectivity, and expensive detection equipment, and achieves good gas sensitivity. Characteristic, ultra-sensitive and highly selective detection, the effect of low detection cost

Active Publication Date: 2018-11-30
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the existing carbon disulfide detection technology, the detection equipment is expensive, the operation process is complicated, the detection time is long, the real-time on-site monitoring cannot be carried out, and the existing resistive metal oxide gas sensor has poor detection sensitivity and selectivity for carbon disulfide gas. Problem, the present invention provides a palladium nanoparticle-modified indium oxide nanosheet composite material and its preparation method and application, not only has a higher specific surface area and good gas-sensing properties, but can be used as a resistive metal oxide gas sensor Sensing layer to achieve ultra-sensitive and highly selective detection of carbon disulfide gas, without the need for expensive detection equipment, low detection cost, simple operation, short detection time, fast and efficient, real-time detection and on-site detection of carbon disulfide gas

Method used

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  • Preparation method and application of palladium nano particle-modified indium oxide nanosheet composite material
  • Preparation method and application of palladium nano particle-modified indium oxide nanosheet composite material

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preparation example Construction

[0025] A palladium nanoparticle-modified indium oxide nanosheet composite material, the preparation method of which may comprise the following steps:

[0026] Step A, according to the weight ratio of indium nitrate: resorcinol: N, N-dimethylformamide: acetone=1:0.1~0.8:50~150:50~100, indium nitrate, resorcinol, Mix N,N-dimethylformamide and acetone together, stir for 0.1-2 hours, add deionized water, then place in a closed environment at 80-200°C for 0.5-24 hours, and then perform solid-liquid separation and washing. In this way, three-dimensional network-like indium-based organic framework nanosheets are prepared. Wherein, the amount of the deionized water is 0.001-0.1 times the mass of the indium nitrate.

[0027] Step B, dispersing the indium-based organic framework nanosheets with a three-dimensional network structure into acetone, and controlling its concentration to 0.05-2.5 mg / mL, stirring for 10-60 min, then adding palladium nitrate, and stirring for 1-24 h, Then sol...

Embodiment 1

[0039] A palladium nanoparticle-modified indium oxide nanosheet composite material, the preparation method of which comprises the following steps:

[0040] Step a1, according to the weight ratio of indium nitrate:resorcinol:N,N-dimethylformamide:acetone=1:0.1~0.8:50~150:50~100, indium nitrate, resorcinol, Mix N,N-dimethylformamide and acetone together, stir for 1 hour, add an appropriate amount of deionized water, then place it in a closed environment at 150°C for 4 hours, and then perform solid-liquid separation and washing to obtain a three-dimensional Indium-based organic framework nanosheets with network structure.

[0041] Step b1, disperse 50 mg of the indium-based organic framework nanosheets with a three-dimensional network structure into 30 mL of acetone, stir for 30 min, then add 15 mL of palladium nitrate with a concentration of 0.2 mg / mL, and stir for 10 h, then perform solid-liquid separation and Washing, thereby preparing palladium ion-modified three-dimensional...

Embodiment 2

[0049] A palladium nanoparticle-modified indium oxide nanosheet composite material, the preparation method of which comprises the following steps:

[0050] Step a2, according to the weight ratio of indium nitrate:resorcinol:N,N-dimethylformamide:acetone=1:0.1~0.8:50~150:50~100, indium nitrate, resorcinol, Mix N,N-dimethylformamide and acetone together, stir for 2 hours, add an appropriate amount of deionized water, and then place it in a closed environment at 150°C for 6 hours, and then perform solid-liquid separation and washing to obtain a three-dimensional Indium-based organic framework nanosheets with network structure.

[0051] Step b2, disperse 50 mg of the indium-based organic framework nanosheets with a three-dimensional network structure into 40 mL of acetone, stir for 30 min, then add 15 mL of palladium nitrate with a concentration of 0.15 mg / mL, and stir for 10 h, then perform solid-liquid separation and Washing, thereby preparing palladium ion-modified three-dimen...

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Abstract

The invention discloses a palladium nano particle-modifying indium oxide nanosheet composite material as well as a preparation method and application thereof. Indium nitrate, resorcinol, N,N-dimethylformamide and acetone are used as raw materials to prepare an indium-series organic framework nanosheet of a three-dimensional net structure by utilizing a high-temperature high-pressure method, thenthe palladium ion-modifying indium-series organic framework nanosheet of the three-dimensional net structure is prepared by virtue of an electrostatic absorption process, and finally the nano particle-modifying indium oxide nanosheet composite material is prepared by virtue of air calcining and reductive gas reduction. The palladium nano particle-modifying indium oxide nanosheet composite materialnot only has high specific surface area and good gas sensitive characteristic, but also can be used as a sensing layer of a resistance-type metal oxide gas sensor to realize the ultra-sensitive and high-selective detection for carbon disulfide gas, and moreover, no expensive detection equipment is needed, the detection cost is low, the operation is simple, the detection time is short, and rapidness and high efficiency can be realized.

Description

technical field [0001] The present invention relates to the field of indium oxide nanomaterials, in particular to an ultra-fine (the ultra-fine means that the particle size of the nanoparticles is 1-3nm) palladium nanoparticles modified three-dimensional network structure ultra-thin (the ultra-thin It refers to the indium oxide nanosheet composite material whose thickness is 3-10nm and the preparation method and application thereof. Background technique [0002] Malodorous gases are usually present in sewage treatment, sludge treatment and garbage treatment facilities, and these malodorous gases mainly include methyl sulfide, methyl mercaptan, carbon disulfide, dimethyl disulfide, trimethylamine, ammonia, hydrogen sulfide and styrene wait. Among them, carbon disulfide is a chronic harmful gas. After long-term exposure, it is easy to cause coronary arteriosclerosis or accelerate atherosclerosis, which poses a great threat to human and animal health. According to the "Odor P...

Claims

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Application Information

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IPC IPC(8): G01N27/407
CPCG01N27/4074
Inventor 段国韬刘波高磊李科王弘
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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