Reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and preparation method thereof

A graphene-wrapped, gas-sensitive sensor technology, which is applied in the direction of material analysis, instruments, and scientific instruments using wave/particle radiation, can solve the problems of low sensor sensitivity, complex preparation process, and high production cost, and achieve repeatable preparation process , simple process operation and high controllability

Active Publication Date: 2018-07-24
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the problems of low sensitivity, high working temperature, high production cost and complicated preparation process in sensors in the prior art, the present invention aims to provide a reduced graphene oxide-wrapped platinum / tin dioxide (Pt / SnO 2 ) nanoparticle cluster gas sensor and its preparation method, the methanol sensor prepared by the present invention can realize high-sensitivity detection at a temperature of 110°C, can respond quickly, and has high stability; in addition, the preparation method of the present invention is simple, Controllable, low production cost, easy to achieve large-scale production, and has great application prospects

Method used

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  • Reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and preparation method thereof
  • Reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and preparation method thereof
  • Reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and preparation method thereof

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Effect test

Embodiment 1

[0069] 1. A reduced graphene oxide-wrapped Pt / SnO 2 A method for preparing nanoparticle clusters; comprising the following steps:

[0070] 1) Take 100mL of SnCl 4 ·5H 2 O was dissolved in methanol solution and stirred for 60 min to obtain a uniform transparent solution, and then 5 mL of dimethylformamide was mixed with the above transparent solution to obtain a mixed solution.

[0071] 2) Add 5 g of graphene oxide powder into 120 mL of deionized water, and after ultrasonic dispersion, perform reduction treatment with a hydroiodic acid solution with a concentration of 5 mg / mL to obtain a reduced graphene oxide solution.

[0072] 3) Prepare the precursor solution: add the chloroplatinic acid solution to the mixed solution in step 1), so that the Pt:Sn atomic ratio is controlled at 3:100; then add NaOH to adjust the pH value of the solution to 8 to obtain a milky white precursor solution.

[0073] 4) After mixing the reduced graphene oxide solution in step 2) with the precurs...

Embodiment 2

[0083] 1. A reduced graphene oxide-wrapped Pt / SnO 2 A method for preparing nanoparticle clusters; comprising the following steps:

[0084] 1) Take 100mL of SnCl 2 2H 2 O was dissolved in methanol solution and stirred for 30 min to obtain a uniform transparent solution, and then 10 mL of dimethylformamide was mixed with the above transparent solution to obtain a mixed solution.

[0085] 2) Add 5 g of graphene oxide powder into 120 mL of deionized water, and after ultrasonic dispersion, perform reduction treatment with a hydroiodic acid solution with a concentration of 1 mg / mL to obtain a reduced graphene oxide solution.

[0086] 3) Prepare the precursor solution: add the chloroplatinic acid solution to the mixed solution in step 1), so that the Pt:Sn atomic ratio is controlled at 3:100; then add KOH to adjust the pH value of the solution to 8.5 to obtain a milky white precursor solution.

[0087] 4) After mixing the reduced graphene oxide solution in step 2) with the precur...

Embodiment 3

[0095] 1. A reduced graphene oxide-wrapped Pt / SnO 2 A method for preparing nanoparticle clusters; comprising the following steps:

[0096] 1) Take 120mL of SnCl 4 Dissolve in methanol solution and stir for 120min to obtain a uniform transparent solution, then mix 4mL of dimethylformamide with the above transparent solution to obtain a mixed solution.

[0097] 2) Add 5 g of graphene oxide powder into 120 mL of deionized water, and after ultrasonic dispersion, perform reduction treatment with a hydroiodic acid solution with a concentration of 3 mg / mL to obtain a reduced graphene oxide solution.

[0098] 3) Prepare the precursor solution: add the chloroplatinic acid solution to the mixed solution in step 1), so that the Pt:Sn atomic ratio is controlled at 3:100; then add ammonia water, adjust the pH value of the solution to 9, and obtain a milky white precursor solution.

[0099] 4) After mixing the reduced graphene oxide solution in step 2) with the precursor solution in step...

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Abstract

The invention relates to a reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and a preparation method thereof. The structure of a composite is like a core-shell composited structure, wherein the platinum atoms are evenly distributed on the surface of stannic oxide to form a core of a nano-particle cluster, and the surface of the whole core is coated with reducedgraphene oxide as a shell. Aiming at the problems of low sensitivity, high working temperature, high production cost and complicated preparation process in the prior art, the invention provides the reduced graphene oxide coated platinum/stannic oxide nano-particle cluster gas sensor and the preparation method thereof. The prepared methyl alcohol sensor can detect at high sensitivity and at the temperature of 110 DEG C, can respond fast, and is high in stability at the same time; in addition, the preparation method is simple and controllable, the production cost is low, the preparation methodis easy to product on the large scale, and the application prospect is quite excellent.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to a platinum / tin dioxide nanoparticle cluster gas sensor wrapped in reduced graphene oxide and a preparation method thereof. Background technique [0002] The daily life and production of human beings are closely related to the surrounding environment. The existence of harmful gas in the surrounding environment will have a great impact. If there is toxic gas in the gas, it will cause serious harm or even death. Methanol is a simple chemical synthesized on a large scale by coal gasification and natural gas by steam reforming. It is an important chemical basic product and organic chemical raw material. In addition, among the basic organic chemical raw materials in the world, the consumption of methanol is second only to ethylene, propylene, and benzene, ranking fourth. It is an energy source and vehicle fuel with excellent performance. Adding methanol to gasoline in a certain pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20G01N23/20091G01N23/22
CPCG01N23/20G01N23/20091G01N23/22
Inventor 慈立杰彭瑞芹陈靖桦李德平侯广梅
Owner SHANDONG UNIV
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