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Functional bismuth oxyiodide nanoflake array photoelectric organophosphorus pesticide biosensor and preparation method thereof

A technology of organophosphorus pesticides and biosensors, which is applied in the direction of instruments, scientific instruments, and electrochemical variables of materials, so as to avoid the preparation process, save time and cost, and have good reproducibility

Inactive Publication Date: 2014-07-09
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these research results satisfy fast and efficient detection, it is still a great challenge for this detection technology to develop photoactive materials with higher performance and change the critical value of photoresponse to the visible light region for photoelectrochemical sensor detection.

Method used

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  • Functional bismuth oxyiodide nanoflake array photoelectric organophosphorus pesticide biosensor and preparation method thereof
  • Functional bismuth oxyiodide nanoflake array photoelectric organophosphorus pesticide biosensor and preparation method thereof
  • Functional bismuth oxyiodide nanoflake array photoelectric organophosphorus pesticide biosensor and preparation method thereof

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Embodiment 1

[0023] The preparation of functionalized bismuth oxyiodide nanosheet array photoelectric organophosphorus pesticide biosensor, the steps comprising:

[0024] 1) For substrate treatment, put the ITO glass sheet into alcohol and double distilled water for 5 minutes, ultrasonic cleaning each, completely cleaned, and blow dry under nitrogen for later use;

[0025] 2) Weigh 0.254 g Bi(NO 3 ) 3 ·5H 2 O and 0.083 g KI solid were made into 100 mL solution with twice distilled water. Pour equal volumes of BiOI and KI solutions into two 25 mL beakers respectively. Immerse the ITO glass piece prepared in step 1) into the BiOI solution for about 10 s, and then soak and wash in the beakers filled with distilled water. Then immerse in the KI solution for about 10 s, and then transfer to a beaker filled with distilled water for soaking and washing. BiOI NFs / ITO electrodes can be obtained through such a cycle operation, and the double distilled water should be replaced every 5 cycles. ...

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Abstract

The invention discloses a functionalized bismuth oxyiodide nanosheet array photoelectric organophosphorus pesticide biosensor and its preparation. Described biosensor is AChE-BiOINFs / ITO electrode, and its preparation is based on ITO, with Bi(NO3) 5H2O, KI, acetylcholinesterase is raw material, has prepared AChE-BiOINFs / ITO electrode, uses the present invention The photoelectric sensor platform of biologically functionalized AChE-BiOI nanosheets constructed by the method effectively avoids the complex preparation process of titanium dioxide nanotubes and the tedious integration of other units, which greatly saves time and cost. At the same time, the destructive effects of photogenerated holes excited by ultraviolet light and illuminated TiO2 on biomolecules are greatly reduced. The invention has the advantages of simple process, low cost, environmental friendliness and high yield, and meets actual production needs.

Description

technical field [0001] The invention relates to a photoelectrochemical organophosphorus pesticide biosensor and its preparation under the excitation of visible light by biologically functionalized bismuth oxyiodide nanosheet arrays. Background technique [0002] Organophosphorus pesticides are widely used as agricultural pest control agents, and nerve paralyzing agents in military affairs and terrorist attacks. Due to the persistence, bioaccumulation and high toxicity of organophosphorus pesticides in organisms and human bodies. For human health, environment, and food safety, organophosphorus pesticides have received great attention. With the pursuit of human health protection and the desire to control the environment, the detection of trace organic phosphorus has become increasingly important. [0003] In the past ten years, people have established gas phase, liquid phase or mass spectrometry methods for the detection of organophosphorus pesticides. These methods often r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327G01N27/26
Inventor 龚静鸣李雪王小庆
Owner HUAZHONG NORMAL UNIV
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