Luminol selective detect sensor and manufacture method thereof

A detection sensor and selective technology, which is applied in the direction of chemical reaction of materials for analysis, chemiluminescence/bioluminescence, etc., can solve the problems of complex doping methods, short life, and harsh conditions for hot electron generation

Inactive Publication Date: 2011-05-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of a luminol selective detection sensor, which solves the problems of complex doping methods and harsh conditions for thermal electron generation in the past, as a kind of electrode with good reproducibility, easy surface renewal and long service life. Chemiluminescence sensor, which solves the disadvantages of complex preparation process, short life and instability in the past

Method used

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  • Luminol selective detect sensor and manufacture method thereof
  • Luminol selective detect sensor and manufacture method thereof

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preparation example Construction

[0012] The invention provides a preparation method of a luminol selective detection sensor, which is characterized by comprising the following steps:

[0013] (1), after the surface of the high-purity titanium wire is pretreated to remove the surface oxide film, vacuum drying is carried out at room temperature;

[0014] (2), utilize the N that removes water completely, N'-dimethylformamide is used as electrolyte to carry out anodic oxidation to the titanium wire after drying for 3~10 minutes;

[0015] (3), take out the titanium wire after oxidation, and carry out vacuum drying.

[0016] The electrolysis voltage in the described step (2) should be rapidly increased to between 30 and 35V.

[0017] like figure 1 As shown, the present invention further provides a luminol selective detection sensor, which is characterized in that it comprises a high-purity titanium substrate 1 and a layer of carbon-doped titanium oxide film 2, and is characterized in that: the carbon-doped oxide ...

Embodiment 2

[0021] A titanium wire with a diameter of 0.1 cm and a purity of 99% was cut into a length of 6 cm, a section was polished on a water-grinding gauze, and ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to remove the surface oil, and then mixed with acid (V HF : V HNO3 : V H2O =1:4:5) cleaning to remove the oxide film on the surface of the titanium wire. Finally, in DMF, platinum wire is used as auxiliary cathode, titanium wire is used as anode, and oxidized at 32V constant voltage for 5 minutes, that is, a yellow carbon-doped oxide film is obtained on the surface of titanium wire. It is characterized by XPS that the doped carbon atoms exist to replace the position of oxygen in titanium oxide. This preparation method is simpler and faster than reported in the literature, and the stability is more than half a year; when in use, the prepared sensor is used as a working electrode. Cyclic voltammetry scans are used in the BR buffer of =9, and hot electrons...

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Abstract

The invention relates to a Luminol selective detect sensor and a manufacture method thereof, and the manufacture method is characterized by comprising the following steps: (1) carrying out pretreatment to the surface of a titanium wire with high purity to remove the surface oxide film, and then carrying out vacuum drying at room temperature; (2) carrying out anodic oxidation for 3-10 minutes to the dried titanium wire by using fully-dewatered N,N'-Dimethylformamide as the electrolyte; and (3) taking the oxidized titanium wire out and carrying out vacuum drying. The invention solves the problems that the prior doping method is complex and the generation conditions of the thermion are rigorous, and the electrochemiluminescence sensor with good reproducibility, easily-updated surface and long service life solves the defects that the traditional sensor has complex preparation process, short service life and unsteadiness.

Description

technical field [0001] The invention relates to a luminol selective detection sensor and a preparation method thereof. Background technique [0002] The hot electron injection electrochemiluminescence first used the working electrode of aluminum oxide modified aluminum electrode, and then oxide modified electrodes such as tantalum oxide and silicon oxide have also been used in this type of electrochemiluminescence field. The research on titanium oxide has not been reported yet, and the reported hot electron generation requires harsh conditions. It needs to be excited by a strong pulse voltage before the hot electron can pass through the oxide film barrier layer and enter the solution to form hot electrons. Reducing the energy required to generate hot electrons by doping nonmetallic particles has not been investigated. There are many methods of carbon-doped titanium dioxide, which can be prepared by grinding titanium dioxide powder and graphite together. Wenjie Ren's researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76
Inventor 王建江舟赵荣荣
Owner FUZHOU UNIV
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