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Composite material for detecting organic pollutant, rhodamine B, as well as preparation and application of same

A technology for composite materials and pollutants, which is applied in the field of preparation of reduced graphene oxide-ferrocene-chitosan composite materials, and can solve problems such as harm to humans and animals

Inactive Publication Date: 2019-03-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, RhB is harmful to humans and animals and is reproductively and developmentally toxic, neurotoxic and carcinogenic

Method used

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  • Composite material for detecting organic pollutant, rhodamine B, as well as preparation and application of same
  • Composite material for detecting organic pollutant, rhodamine B, as well as preparation and application of same
  • Composite material for detecting organic pollutant, rhodamine B, as well as preparation and application of same

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Embodiment Construction

[0027] The preparation of the reduced graphene oxide-ferrocene-chitosan composite material of the present invention and the method for detecting rhodamine b will be further described below through specific examples.

[0028] 1. Preparation of reduced graphene oxide-ferrocene-chitosan composites

[0029] (1) Preparation of graphite oxide: the first step of pre-oxidation process: 1.25gK 2 S 2 O 8 and 1.25gP 2 O 5 Add to 12.5mL concentrated H at one time 2 SO 4 Then add 1g of graphite powder, heat the mixed solution to 80°C, and heat to reflux for 5h under magnetic stirring. After cooling, add 200mL water to the solution to dilute, then filter, wash neutral, and vacuum at 60°C Set aside to dry. The second step is further oxidation process: Weigh 1g of the above-mentioned dried graphite oxide, and disperse it in 120mL of mixed acid of concentrated sulfuric acid and phosphoric acid (the volume ratio of concentrated sulfuric acid and phosphoric acid is 3:1) under ice bath con...

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Abstract

The invention provides a composite material for detecting a pollutant, rhodamine B. A method includes: connecting graphene oxide and ferrocene through pi-pi effect, supporting chitosan onto the graphene oxide / ferrocene and then reducing the graphene oxide to synthesize reduced graphene oxide / ferrocene / chitosan; then placing an electrode, modified by the reduced graphene oxide / ferrocene / chitosan, being a working electrode in a [Fe(CN)6]<4-> / <3-> solution containing rhodamine B, and performing differential pulse voltammetry for recognition, scanning speed being 50 mV / s and scanning range being -0.2V to 0.6V. In the concentration range of 0.001 [mu]M to 70 [mu]M of the rhodamine B, the intensity of differential pulse stripping peak current and the concentration of the rhodamine B have a linear relationship: as the concentration of the rhodamine B increases, the peak current is reduced. The linear equation is: delta I = (7.619 + / - 0.585) + (0.539 + / - 0.016) CRhB.

Description

technical field [0001] The invention relates to a method for preparing a reduced graphene oxide-ferrocene-chitosan composite material with excellent electrical properties; the invention also relates to the specific application of the composite material in the detection of rhodamine b, which belongs to electrochemical sensing Identify technical areas. Background technique [0002] Rhodamine B (RhB) is an important organic dye in industry, widely used as a colorant in textiles and food, and as a fluorescent dye in biological and analytical chemistry. However, RhB is harmful to humans and animals, and is reproductively and developmentally toxic, neurotoxic and carcinogenic. As the main component of printing and dyeing wastewater, RhB also has a negative impact on the ecological environment. Today, rhodamine B is banned for use as a food coloring by the China Food and Drug Administration. Therefore, it is particularly important to research and develop a simple, rapid and sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K5/56C08K3/04G01N27/30G01N27/48
CPCC08K5/56C08K3/042G01N27/308G01N27/48C08L5/08
Inventor 莫尊理杨星牛小慧赵盼刘振宇郭瑞斌刘妮娟欧阳美璇
Owner NORTHWEST NORMAL UNIVERSITY