Optical sensor for fast detecting polycyclic aromatic hydrocarbon type contaminants and preparation and application thereof

An optical sensor and polycyclic aromatic hydrocarbon technology, which is applied in the field of optical sensors to achieve the effects of stable physical and chemical properties, increased electrical conductivity and simple production steps

Inactive Publication Date: 2010-09-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, there is no TiO modified with CdTe quantum dots at home and abroad. 2 Related reports on the application of nanotube arrays in optical sensing and detection of polycyclic aromatic hydrocarbon pollutants

Method used

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  • Optical sensor for fast detecting polycyclic aromatic hydrocarbon type contaminants and preparation and application thereof
  • Optical sensor for fast detecting polycyclic aromatic hydrocarbon type contaminants and preparation and application thereof
  • Optical sensor for fast detecting polycyclic aromatic hydrocarbon type contaminants and preparation and application thereof

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Embodiment 1

[0037] (1) Preparation of TiO by anodic oxidation 2 nanotube arrays;

[0038] (a) polishing the surface of the base material (titanium sheet), cleaning it for subsequent use;

[0039] (b) Preparation of inorganic electrolyte: the electrolyte is composed of 0.1M NaF and 0.5M NaHSO 4 The composition of the aqueous solution;

[0040] (c) under 20V direct current voltage, with pure titanium or titanium alloy as anode, platinum sheet as cathode, prepare nanotube by electrolysis in electrolyte;

[0041] (2) Preparation of CdTe quantum dot-doped TiO by pulse plating method 2 nanotube arrays;

[0042] (a) Preparation containing 0.05MCdSO 4 and 0.02M NaTeO 3 The plating solution, with H 2 SO 4 Adjust the pH to 2;

[0043] (b) TiO prepared above 2 The nanotube array was used as the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode. The control pulse voltage was -2V, the on-off ratio ...

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Abstract

The invention relates to an optical sensor for fast detecting polycyclic aromatic hydrocarbon type contaminants. A TiO2 nanometer tube array with CdTe quantum dots decorated on the surface and inside the TiO2 nanometer tube array is used as the optical sensor for detecting the polycyclic aromatic hydrocarbon type contaminants, and the dimension of the CdTe quantum dots is between 5 and 25 nm. When the composite material is used as a sensing element, the detection on the polycyclic aromatic hydrocarbon type persistent organic contaminants can be realized. Through the method of the invention, the inventor successfully expands the application of the fluorescence performance of the CdTe quantum dots to a range lower than 450 nm for the first time. The sensing element has the advantages of simple manufacture step, low cost, stable physical and chemical property and portability, so the sensing element can be used as the optical sensor for fast, efficiently and quantitatively detecting the polycyclic aromatic hydrocarbon type contaminants in the environment.

Description

technical field [0001] The invention relates to an optical sensor for rapidly detecting polycyclic aromatic hydrocarbon persistent organic pollutants in the environment, as well as its preparation and application. Background technique [0002] A sensor is a special device that can acquire and process information. It can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the needs of information transmission. , processing, storage, display, recording and control requirements. There are many kinds of sensors, which can be divided into physical, chemical and biological sensors according to different sensitive elements. In the research of basic disciplines, sensors have a prominent position. The obstacles encountered in many basic scientific researches are first of all the difficulties in obtaining object information, and the emergence of some new mechanisms a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 蔡青云陈贝贝杨丽霞
Owner HUNAN UNIV
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