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Hectorite-rhodamine hybrid fluorescent material and its preparation method and application

A fluorescent material and hectorite technology, applied in the field of heavy metal detection, can solve the problems of poor water solubility, decreased sensitivity of fluorescent probes, easy precipitation, etc., and achieve the effects of obvious color change, improved water solubility, and large fluorescence change.

Active Publication Date: 2020-08-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The detection of heavy metal ions is mostly carried out in the aqueous phase system, and rhodamine dyes have almost no solubility in the aqueous phase, so the sensitivity of rhodamine fluorescent probes decreases, and it is applied to Cu 2+ detection is limited
In addition, most fluorescent probes based on rhodamine-based fluorescent dyes still have many defects, such as poor stability, easy precipitation, poor water solubility, non-recyclability, and secondary pollution caused by detection in the organic phase.

Method used

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  • Hectorite-rhodamine hybrid fluorescent material and its preparation method and application
  • Hectorite-rhodamine hybrid fluorescent material and its preparation method and application
  • Hectorite-rhodamine hybrid fluorescent material and its preparation method and application

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Effect test

Embodiment 1

[0038] One, according to the following route synthetic rhodamine dye

[0039] 1. Synthesis of rhodamine hydrazide

[0040]

[0041] After adding 18.00 g (37.6 mmol) of Rhodamine B into a 250 mL round bottom flask, about 120 mL of ethanol was added to dissolve it. With vigorous stirring at room temperature, 48.0 mL of excess hydrazine hydrate (80%) was added dropwise. After the dropwise addition, stir and heat to reflux for 2 h, the solution turns from dark purple to bright and clear orange. After the mixture was cooled to room temperature, the solvent was removed under reduced pressure. About 10 M HCl solution was added to the above flask until there was no solid and the solution turned into a clear red solution, at which point the pH of the solution was about 1. Afterwards, the above solution was transferred to a 250 mL beaker, and about 10 M NaOH solution was slowly added with stirring until the pH of the solution was about 10. Finally, the precipitate in the solution...

Embodiment 2

[0049] Preparation of hectorite-rhodamine hybrid fluorescent material

[0050]Grinding: Take 0.24 g of synthetic laponite and 0.08 g of rhodamine dye and mix them evenly in an agate mortar, and grind the sample for 8 min until the color is light red.

[0051] Baking: take the ground mixed sample, place it in a vacuum drying oven at 100° C. and bake for 15 hours to obtain the hectorite-rhodamine hybrid fluorescent material.

Embodiment 3

[0053] Preparation of hectorite-rhodamine hybrid fluorescent material

[0054] Grinding: Take 0.64 g of synthetic laponite and 0.08 g of rhodamine dye and mix them evenly in an agate mortar, and grind the sample for 15 min until the color is light red.

[0055] Baking: Take the ground mixed sample, put it in a vacuum drying oven at 140° C. and bake for 10 hours to obtain the laponite-rhodamine hybrid fluorescent material.

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Abstract

The invention discloses a laponite-rhodamine hybrid fluorescent material. Synthesized laponite and a rhodamine dye are mixed, and the mixture is ground and then heated, so that rhodamine dye moleculesenter a laponite slice layer structure to form a molecular match-up effect, and the laponite-rhodamine hybrid fluorescent material is obtained. The invention further discloses a method for detectingapplication of the laponite-rhodamine hybrid fluorescent material to Cu<2+>. The laponite-rhodamine hybrid fluorescent material has good water solubility and specific selectivity, only reacts with copper ions, has large fluorescence change and obvious color change, and thus can be used for detecting the copper ions in pure water, thereby achieving the purpose of detection of copper pollution.

Description

technical field [0001] The invention belongs to the technical field of heavy metal detection, and relates to a fluorescent material used for detecting copper ions in water or soil, in particular to a laponite-rhodamine hybrid fluorescent material and a preparation method and application thereof. Background technique [0002] In the booming fields of life science, chemical industry, medicine, environmental science and battery electroplating, heavy metal ions play an indispensable role, especially in chemical and pharmaceutical production, a large number of heavy metals are used, resulting in many kinds of heavy metal ions Pollution is unavoidable, causing irreparable damage to the environment and accompanying huge economic losses. [0003] Copper is circulated in nature through the atmosphere, water, soil, rocks and organisms. Copper pollution is one of the important factors of environmental pollution. The main sources are copper fume, waste water and waste residue. The aver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06G01N21/64
CPCC09K11/025C09K11/06C09K2211/1007C09K2211/1029C09K2211/1088G01N21/6428G01N2021/6417G01N2021/6432
Inventor 蔡鹏陈强张济李万庆杨波陈静丁师杰王志辉
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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