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A fluorescent sensor for detecting aluminum ions and its preparation method
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A fluorescent sensor, aluminum ion technology, applied in the field of sensing, to achieve the effect of low detection limit, high yield and strong anti-interference ability
Active Publication Date: 2019-02-19
KUNMING UNIV OF SCI & TECH
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[0004] No modified nanosilica-based fluorescent chemical sensors for aluminum ions
Method used
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Embodiment 1
[0035] Embodiment 1: A kind of preparation method of the fluorescent sensor that is used to detect aluminum ion, concrete steps are as follows:
[0036] (1) Put nano-silica (the particle size of nano-silica is 10nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silica is 5:1; then add aminopropyltrimethoxy Silane, in which the liquid-solid ratio of aminopropyltrimethoxysilane to silicon dioxide mL:mg is 1:1, and the product A obtained by reflux reaction at a temperature of 60°C for 18 hours is marked as APTMS-SiO 2 ;
[0037] (2) The product A (APTMS-SiO 2 ) into distilled water, where distilled water and product A (APTMS-SiO 2 ) The liquid-solid ratio mL:mg is 5:1; add 4-hydroxycoumarin, wherein 4-hydroxycoumarin and APTMS-SiO 2 The mass ratio is 1:2; the product B obtained by reflux reaction at a temperature of 60°C for 8 hours is labeled as HC-SiO 2 ;
[0038] (3) The product B (HC-SiO 2 ) into acetic acid, where acetic acid and product B (HC-SiO 2 )...
Embodiment 2
[0044] Embodiment 2: A kind of preparation method of the fluorescent sensor that is used to detect aluminum ion, concrete steps are as follows:
[0045] (1) Put nano-silica (the particle size of nano-silica is 15nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silicon dioxide is 10:1; then add aminopropyltrimethoxy Silane, in which the liquid-solid ratio of aminopropyltrimethoxysilane to silicon dioxide mL:mg is 2:1, and the product A obtained by reflux reaction at a temperature of 70°C for 20h is marked as APTMS-SiO 2 ;
[0046] (2) The product A (APTMS-SiO 2 ) into distilled water, where distilled water and product A (APTMS-SiO 2 ) The liquid-solid ratio mL:mg is 10:1; add 4-hydroxycoumarin, wherein 4-hydroxycoumarin and APTMS-SiO 2 The mass ratio is 3:2; the product B obtained by reflux reaction at a temperature of 75°C for 10 hours is labeled as HC-SiO 2 ;
[0047] (3) The product B (HC-SiO 2 ) into acetic acid, where acetic acid and product B (HC-S...
Embodiment 3
[0052] Embodiment 3: A kind of preparation method of the fluorescent sensor that is used to detect aluminum ion, concrete steps are as follows:
[0053] (1) Put nano-silica (the particle size of nano-silica is 20nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silica is 18:1; then add aminopropyltrimethoxy Silane, in which the liquid-solid ratio of aminopropyltrimethoxysilane to silicon dioxide mL:mg is 3:2, and the product A obtained by reflux reaction at a temperature of 80°C for 22 hours is marked as APTMS-SiO 2 ;
[0054] (2) The product A (APTMS-SiO 2 ) into distilled water, where distilled water and product A (APTMS-SiO 2 ) The liquid-solid ratio mL:mg is 18:1; add 4-hydroxycoumarin, wherein 4-hydroxycoumarin and product A (APTMS-SiO 2 ) with a mass ratio of 1:1; the product B obtained by reflux reaction at a temperature of 90°C for 11 h, marked as HC-SiO 2 ;
[0055] (3) The product B (HC-SiO 2 ) into acetic acid, where acetic acid and product B ...
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Abstract
The invention relates to a fluorescence sensor used for detecting an aluminum ion and a preparation method thereof, belonging to the technical field of nano-structural fluorescence chemical sensors. The preparation method provided by the invention comprises the following steps: placing nanometer silicon dioxide in ethanol, then adding aminopropyltrimethoxysilane, and carrying out a reflux reaction so as to obtain a product A; placing the product A in distilled water, then adding 4-hydroxycoumarin, and carrying out a reflux reaction so as to obtain a product B; placing the product B in acetic acid, then adding concentrated nitric acid, and carrying out a reflux reaction so as to obtain a product C; subjecting a product C in methanol, then adding a carbon loaded palladium catalyst and concentrated hydrochloric acid, carrying out a reaction, and carrying out separation so as to obtain a solid product D; and placing the product D in distilled water, then adding 2-hydroxybenzaldehyde, carrying out a reflux reaction, and carrying out centrifugal separation and drying so as to obtain the fluorescence sensor. The fluorescence chemical sensor provided by the invention has the advantages of fast response speed, low detection limit, simple and convenient operation, strong anti-interference ability, wide pH application range, extensive applicability to detection of the aluminum ion in various water bodies, and facilitation to popularization and application.
Description
technical field [0001] The invention relates to a fluorescent sensor for detecting aluminum ions and a preparation method thereof, belonging to the field of sensor technology. Background technique [0002] Aluminum is an extremely abundant element in the earth's crust and exists in large quantities in the natural environment. Aluminum can enter the human body through water and food, and has serious toxic effects on aquatic organisms, plants, animals and humans. Therefore, it is very important to establish a rapid and highly sensitive analysis method for trace aluminum in water environment. The determination methods of aluminum in environmental samples mainly include spectrophotometry, fluorescence photometry, electrochemical method, atomic absorption spectrometry, plasma atomic emission spectrometry and plasma mass spectrometry. Fluorescence analysis has received great attention because of its unique advantages such as high sensitivity and simple operation. The disadvanta...
Claims
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Application Information
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