Preparation method and application of carbon dots for visually detecting iron ions
A technology of iron ions and ferrous ions, which is applied in chemical instruments and methods, nanocarbons, measuring devices, etc., can solve the problems of real-time data, cumbersome process and high cost of environmental samples that limit the detection range of environmental samples.
Pending Publication Date: 2022-06-24
XIANGTAN UNIV
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Problems solved by technology
Although these testing techniques can accurately and effectively detect pollutants in environmental samples, there are disadvantages such as cumbersome process, long time-consuming, high cost, etc., which greatly limit the scope of environmental sample detection and the real-time performance of environmental sample data acquisition.
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[0025] specific implementation
[0026] The applicant will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings and specific embodiments below, and the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] All chemical reagents and solvents used in the examples are of analytical grade.
[0028] specific implementation 1
[0029] 1) Preparation of carbon dots: put 2 g of citric acid, 2 g of thiourea and 0.5 g of borax into a conical flask, add 20 mL of ultrapure water, sonicate until completely dissolved, put the obtained solution in a microwave oven, The reaction was carried out at 100 W for 5 min. After the reaction wa...
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The invention discloses a preparation method and application of carbon dots for visual detection of iron ions, and the preparation method comprises the following steps: 1) respectively adding ultrapure water into citric acid, thiourea and borax, and carrying out ultrasonic dissolution; respectively preparing solid carbon dots from the obtained solutions by a microwave method; 2) adding ultrapure water into the obtained solid, performing ultrasonic dissolution, and performing centrifugation; taking supernate, filtering a membrane, and freeze-drying to obtain solid pure carbon dots. The preparation method of the carbon dots has the advantages of simplicity in operation, low cost, high preparation efficiency and the like, the carbon dots have obvious visual response to the iron ions, and the prepared carbon dots can be used for qualitative, quantitative and semi-quantitative detection of the iron ions.
Description
technical field [0001] The invention specifically relates to a preparation method and application of carbon dots for visual detection of iron ions, and belongs to the technical field of heavy metal ion detection reagents. Background technique [0002] With the rapid development of industrialization, the discharge of a large amount of industrial wastewater leads to excessive heavy metal ions in water and eutrophication of water bodies. Heavy metal ions in solid waste formed by dumping industrial waste also pose a great threat to the environment. Therefore, effective treatment of heavy metal ion pollutants in the environment is an urgent problem to be solved. However, the premise of effective prevention and control of pollutants in the environment is to conduct real-time and effective monitoring of these pollutants, so as to be targeted. Take iron ion as an example. It is a widely distributed ion in the environment. As a trace element required by the human body, iron is an in...
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Login to View More IPC IPC(8): C09K11/65B82Y20/00B82Y40/00C01B32/15G01N21/25G01N21/33G01N21/64G01N21/84
CPCC09K11/65B82Y20/00B82Y40/00C01B32/15G01N21/6428G01N21/643G01N21/33G01N21/251G01N21/25G01N21/84G01N2021/6432
Inventor 吴学文李维熊艳曹旭媛周程宇曾小成
Owner XIANGTAN UNIV