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Method for determining p-nitrophenol in water system by taking graphene-loaded nano-nickel as electrode

A technology of p-nitrophenol and graphene, applied in the direction of material electrochemical variables, etc., can solve the problems of complex operation and inability to be widely used, and achieve the effect of high detection accuracy and good cycle stability

Inactive Publication Date: 2014-07-16
HEILONGJIANG UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that existing methods for detecting p-nitrophenol in water systems are complex in operation and cannot be widely used, and provide a method for measuring p-nitrophenol in water systems using graphene-loaded nano-nickel as an electrode

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  • Method for determining p-nitrophenol in water system by taking graphene-loaded nano-nickel as electrode
  • Method for determining p-nitrophenol in water system by taking graphene-loaded nano-nickel as electrode
  • Method for determining p-nitrophenol in water system by taking graphene-loaded nano-nickel as electrode

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specific Embodiment approach 1

[0029] Specific embodiment one: present embodiment is a kind of method that uses graphene-supported nano-nickel as electrode to measure p-nitrophenol in water system, specifically completes according to the following steps:

[0030] 1. Purification of pure carbon electrodes:

[0031] First, soak the pure carbon electrode in concentrated nitric acid for 18h-30h, then polish it with metallographic sandpaper, and then polish it with alumina slurry, and then use acetone and absolute ethanol to clean it alternately ultrasonically until it is completely clean after washing. Until the water and ethanol are colorless, dry at a temperature of 40-60°C for 18h-30h to obtain a purified carbon electrode;

[0032] 2. Preparation of graphene / nano-nickel composite material:

[0033] NiCl 2 ·6H 2 O was added to the ethylene glycol solution and ultrasonically dissolved at room temperature to completely dissolve it, then graphene oxide was added, and ultrasonically oscillated for 1 hour at ro...

specific Embodiment approach 2

[0044] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the particle size of the alumina particles in the alumina slurry described in Step 1 is 0.05 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0045]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the pure carbon electrode is first soaked in concentrated nitric acid for 24 hours, then polished with metallographic sandpaper, and then alumina slurry is used Perform polishing treatment, and then use acetone and absolute ethanol to alternately ultrasonically clean until the washed absolute ethanol is colorless, and finally dry at a temperature of 50°C for 24 hours to obtain a purified carbon electrode. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for determining p-nitrophenol in a water system by taking graphene-loaded nano-nickel as an electrode, relates to the method for determining the p-nitrophenol in the water system, and aims to solve the problems that the conventional method for detecting the p-nitrophenol in the water system is complex in operation and cannot be widely applied. The method comprises the following steps: firstly, purifying a pure carbon electrode to obtain a purified pure carbon electrode; secondly, preparing a graphene / nano-nickel composite material; thirdly, preparing a composite material-modified carbon electrode; fourthly, preparing a liquid to be measured to obtain the liquid to be measured; and fifthly, performing detection of an electrochemical experiment, namely determining the electrochemical properties by adopting a three-electrode system by taking the composite material-modified carbon electrode as a working electrode, a platinum electrode as a counter electrode, and a Hg / HgO electrode as a reference electrode, and performing test by taking a certain scanning voltage and a certain scanning speed as experiment parameters to complete the determination of the p-nitrophenol in the water system. The method is mainly used for determining the p-nitrophenol in the water system.

Description

technical field [0001] The invention relates to a method for measuring p-nitrophenol in water system. Background technique [0002] Nano-nickel powder is an important magnetic metal material, which has broad application prospects in many fields such as magnetic storage, medical diagnosis, conductive coating, sensor, catalysis and rechargeable battery. Graphene is a carbon material with a two-dimensional honeycomb lattice structure. Compared with other carbon materials, it has a stable structural composition, a larger specific surface area and better electron conductivity. These excellent physical The chemical properties make it more suitable as a catalyst carrier. Nano-nickel-modified graphene composites not only have the properties of both, but also have a synergistic effect with each other. They are excellent materials for making chemically modified electrodes and have broad application prospects in the field of electrocatalysis. Carbon-based electrodes are widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
Inventor 赵东宇王琳付玥张锡文
Owner HEILONGJIANG UNIV
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