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Preparation method for titanium dioxide-graphene/screen-printed electrode for detecting parachlorophenol

A technology of screen printing electrodes and titanium dioxide, applied in the direction of electrochemical variables of materials, etc., to achieve the effect of improving sensitivity and detection limit, simple process and good reproducibility

Inactive Publication Date: 2014-08-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been many reports on the preparation technology and application of graphene-based nanocomposites.

Method used

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  • Preparation method for titanium dioxide-graphene/screen-printed electrode for detecting parachlorophenol
  • Preparation method for titanium dioxide-graphene/screen-printed electrode for detecting parachlorophenol
  • Preparation method for titanium dioxide-graphene/screen-printed electrode for detecting parachlorophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] TiO 2 - Preparation of GO / SPE:

[0035] Activation treatment of SPE: In the electrochemical workstation, the reference electrode of SPE is used as the reference electrode, the working electrode of SPE is used as the working electrode, and the counter electrode of SPE is used as the counter electrode. The 0.5 M sulfuric acid solution was scanned at a sweep speed for 10 cycles, and the activated electrode was left to dry at room temperature.

[0036] Weigh 5 mg of graphene oxide, add 30 mL of deionized water, and react in an ultrasonic reactor (setting frequency 125w) for 30 min until a tan solution is produced, add 40 mL of 0.04 mol / L TiF 4 solution, stirred, and the mixture was placed in a 150mL glass cup, sealed with parafilm and placed in an ultrasonic reactor in a water bath for 50 minutes to ensure better dispersion of the mixed solution. The obtained mixture was heated in an oven at 70°C for 6 hours, and then the mixture was Put it in a polytetrafluoroethylene au...

Embodiment 2

[0048] TiO 2 - Preparation of GO / SPE:

[0049] Activation treatment of SPE: In the electrochemical workstation, the reference electrode of SPE is used as the reference electrode, the working electrode of SPE is used as the working electrode, and the counter electrode of SPE is used as the counter electrode. Scan the 0.1 M nitric acid solution at a sweep speed for 1 cycle, and place the activated electrode at room temperature to dry.

[0050] Weigh 5 mg of graphene oxide, add 40 mL of deionized water, and react in an ultrasonic reactor (setting frequency 125w) for 30 min until a tan solution is produced, then add 55 mL of 0.02 mol / L TiF 4 Solution, stirred, and the mixture was placed in a 150mL glass cup, sealed with a parafilm and placed in an ultrasonic reactor in a water bath for 50min to ensure better dispersion of the mixed solution. The obtained mixture was heated in an oven at 80°C for 5h, and then the mixture Place in a polytetrafluoroethylene autoclave (30ml) with a ...

Embodiment 3

[0056] TiO 2 - Preparation of GO / SPE:

[0057] Activation treatment of SPE: In the electrochemical workstation, the reference electrode of SPE is used as the reference electrode, the working electrode of SPE is used as the working electrode, and the counter electrode of SPE is used as the counter electrode. The 1 M hydrochloric acid solution was scanned at a sweep speed for 20 cycles, and the activated electrode was left to dry at room temperature.

[0058] Weigh 5 mg of graphene oxide, add 50 mL of deionized water, and react in an ultrasonic reactor (setting frequency 125w) for 30 min until a tan solution is produced, then add 70 mL of 0.002 mol / L TiF 4 solution, stirred, and the mixture was placed in a 150mL glass cup, sealed with parafilm and placed in an ultrasonic reactor in a water bath for 50 minutes to ensure better dispersion of the mixed solution. The obtained mixture was heated in an oven at 90°C for 4 hours, and then the mixture was Put it in a polytetrafluoroeth...

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Abstract

A preparation method for titanium dioxide-graphene / screen-printed electrode for detecting parachlorophenol comprises the following steps: preparation of titanium dioxide-graphene composite, preparation of titanium dioxide-graphene dispersion, and preparation of titanium dioxide-graphene / screen-printed electrode. In the invention, the carbon material easy to obtain is used for preparing the electrode-sensitive substance; the prepared titanium dioxide-graphene loaded screen-printed electrode is stable in performance, higher in sensitivity and low in cost, and has a good application prospect; by virtue of a dripping and coating method, the titanium dioxide-graphene dispersion is directly applied to the surface of an electrode to prepare a sensitive film, so that the process is simple and the reproducibility is high. The preparation method adopts the titanium dioxide-graphene composite as a sensitive material to obtain the highly sensitive film, so that the sensitivity and detection limit of the sensor are greatly improved; the screen-printed electrode prepared in the invention can quickly and sensitively detect p-chlorophenol and can be applied to different environmental samples.

Description

technical field [0001] The invention belongs to the field of titanium dioxide-graphene / screen printing electrodes, in particular to a method for preparing a titanium dioxide-graphene / screen printing electrode for detecting p-chlorophenol. Background technique [0002] P-Chlorophenol is widely used as a preservative for wood, paint and leather, and also as a disinfectant, such as herbicide, fungicide, insecticide, etc. However, due to its toxicity and antibacterial properties, this chlorophenol is an important organic pollutant in the environment, especially in water sources. Therefore, it is of great significance to determine its content in the water environment. [0003] In recent years, many methods have been used to determine p-chlorophenol, including gas chromatography, high performance liquid chromatography, capillary electrophoresis and spectrophotometry. Although these methods have relatively high sensitivity and selectivity, most of them have some disadvantages, su...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 白雪黄欣华祖林张晓媛秦琴王超凡顾海鑫张琪
Owner HOHAI UNIV
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