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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 problems such as short life, complicated doping methods, and harsh conditions for hot electron generation

Inactive Publication Date: 2010-03-10
FUZHOU UNIV
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  • 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

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preparation example Construction

[0012] The invention provides a kind of preparation method of luminol selective detection sensor, it is characterized in that 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), using N,N'-dimethylformamide that completely removes water as the electrolyte to anodize the dried titanium wire for 3 to 10 minutes;

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

[0016] The electrolysis voltage in the step (2) will be quickly added to between 30~35V.

[0017] Such as figure 1 As shown, the present invention further provides a luminol selective detection sensor, which is characterized in that it includes 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 The titanium film 2 is grown directly on the high-pur...

Embodiment 2

[0021] A titanium wire with a diameter of 0.1 cm and a purity of 99% was cut into 6 cm long, and a section was polished on a water-milled gauze, and was ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to remove 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, the platinum wire is used as the auxiliary cathode, the titanium wire is used as the anode, and oxidized at a constant voltage of 32V for 5 minutes, that is, a layer of yellow carbon-doped oxide film is obtained on the surface of the titanium wire. XPS is used to characterize the existence of doped carbon atoms to replace the oxygen in titanium oxide. This preparation method is simpler and faster than that reported in the literature, and its stability is more than half a year; The BR buffer of =9 was scanned by cyclic voltammetry, and thermionic electrons were generated at about -1V, and the ...

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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 longservice 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 first working electrode used in hot electron injection electrochemiluminescence is an aluminum electrode modified by alumina, and then electrodes modified by oxides such as tantalum oxide and silicon oxide have also been used in this type of electrochemiluminescence. The research on titanium oxide has not been reported yet, and the reported generation of hot electrons requires harsh conditions, and strong pulse voltage excitation is required for hot electrons to pass through the barrier layer of the oxide film and enter the solution to form hot electrons. Reducing the energy required to generate hot electrons by doping with non-metallic particles has not been investigated. There are many methods of carbon-doped titanium dioxide, which can be obtained by grinding titanium dioxide powder and graphite together. Wenjie Ren’s re...

Claims

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Application Information

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