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A graphene-sensitized fiber-optic lactate sensor and its preparation method

A graphene and sensor technology, applied in the field of sensors, can solve problems such as inability to complete high-precision lactic acid concentration measurement, insignificant changes in discrimination, insensitive lactic acid detection, etc., and achieve good linear fitting, repeatability, and sensitivity High and stable effect

Active Publication Date: 2021-05-11
DEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The inventors found that among the current sensors for detecting the concentration of lactic acid, only the optical fiber sensor with electroless nickel oxide plating does not have obvious changes in the discrimination of the concentration of lactic acid in different intervals, and is not sensitive to low-concentration lactic acid detection, and has low stability. Complete high-precision lactic acid concentration measurement

Method used

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  • A graphene-sensitized fiber-optic lactate sensor and its preparation method
  • A graphene-sensitized fiber-optic lactate sensor and its preparation method
  • A graphene-sensitized fiber-optic lactate sensor and its preparation method

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Embodiment 1

[0029] This embodiment provides a graphene-sensitized optical fiber lactate sensor, comprising: an optical fiber and a nickel coating; a graphene layer is grown in the polished region of the optical fiber after melting and tapering, and the graphene layer is coated everywhere. Nickel plating.

[0030] In this embodiment, an optical fiber is an abbreviation for optical fiber, which is a fiber made of glass or plastic and can be used as a light transmission tool. Generally, the core is surrounded by a glass envelope with a lower refractive index than the core.

[0031] In this embodiment, the polishing of the optical fiber includes cross-section polishing and side polishing. The cross-section polished optical fiber is made by polishing various optical fiber slopes, tapers, etc. made of bare optical fibers; the side polished optical fiber is on a common communication optical fiber. Using optical micromachining technology, the optical fiber made by polishing the cylindrical optica...

Embodiment 2

[0073] This embodiment provides a method for preparing a graphene-sensitized optical fiber lactate sensor, comprising:

[0074] After the optical fiber is fused and tapered, graphene is grown in the polished area, and the graphene oxide layer is obtained through oxidation treatment;

[0075] A nickel plating solution is prepared from a nickel sulfate solution and a reducing agent solution, and the graphene oxide layer of the optical fiber is soaked in the nickel plating solution.

[0076] In this embodiment, after the single-mode optical fiber is tapered, graphene is directly grown in the polished region of the optical fiber by a chemical deposition (CVD) method, and graphene oxide is produced by a Hummers oxidation method.

[0077] In this embodiment, sodium acetate, sodium citrate and sodium hypophosphite were added to the nickel sulfate solution, and an appropriate amount of ammonia was added to adjust the pH value of the solution to about 10 to obtain an electroless platin...

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Abstract

The invention discloses a graphene-sensitized optical fiber lactic acid sensor and a preparation method thereof, comprising: an optical fiber and a nickel coating; a graphene layer is grown at the polishing region of the optical fiber after melting and tapering, and a graphene layer is grown at the graphene layer Apply the nickel plating. Taper the single-mode optical fiber, and use the chemical deposition method to directly grow graphene in the polished area of ​​the optical fiber to form a complete and uniform graphene layer, so that the nickel-sensitive material can be stably combined with the optical fiber, thereby making a new graphene-based optical fiber lactate sensor , It has good linear fit and repeatability for the measurement of low concentration of lactic acid.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a graphene-sensitized optical fiber lactate sensor and a preparation method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Lactic acid is a body compound naturally produced in every human body. It is not only a by-product of exercise for the human body, but also a fuel for the human body to exercise. In many sports laboratories, blood lactic acid response has become a key indicator like heart rate. Routine variables, blood lactic acid level and lactic acid clearance rate can be used to judge the condition of patients with infection and septic shock after malignant tumor surgery and biochemical indicators for the prognosis of neonatal sepsis, and to evaluate the clinical significance and value of the prognosis of sepsis patients. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N21/41C03B37/15C03C25/52C03C25/1065C23C18/36C23C16/26C23C28/00
CPCG01N21/25G01N21/41C03B37/15C03C25/52C03C25/1068C23C16/26C23C18/36C23C28/322C23C28/34C23C28/30G01N21/7703G01N2021/7709C03B23/207C03C25/1062C03C25/1063C03C25/223C23C18/1666C23C18/165C23C18/1692
Inventor 张俊叶袁光良李振华王吉华周耀旗王静
Owner DEZHOU UNIV
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