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A pH-regulated method for preparing silver nanoclusters with strong fluorescence emission

A technology of silver nanoclusters and fluorescence emission, which is applied in the direction of nanotechnology, can solve the problems of stability and strength to be further improved, and achieve the effect of low cost, fast synthesis speed and good stability

Active Publication Date: 2019-05-17
HUNAN UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, there are many methods for synthesizing silver nanomaterials, such as chemical reduction method, photoreduction method, template method, radiation method, ultrasonic method, inverse microemulsion method, etc. Further improve

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  • A pH-regulated method for preparing silver nanoclusters with strong fluorescence emission
  • A pH-regulated method for preparing silver nanoclusters with strong fluorescence emission
  • A pH-regulated method for preparing silver nanoclusters with strong fluorescence emission

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Embodiment Construction

[0015] The following examples are intended to further illustrate the present invention, but not to further limit the present invention.

[0016] (1) Preparation of the solution used:

[0017] Weigh 0.0849 g of silver nitrate solid to prepare 50 mL of 0.01 M silver nitrate solution, and mix 1.0´10 - 2 M diluted to 50mL 1.0´10 -3 M of silver nitrate solution, and then 1.0´10 -3 M diluted to 50 mL 1.0´10 - 4 M of silver nitrate solution, and finally 1.0´10 - 4 M diluted to 250 mL 5.0´10 - 5 M silver nitrate stock solution; weigh 0.0879 g of chromotropic acid 2R to prepare 250 mL 7.5´10 -4 M's chromotropic acid 2R stock solution; weigh 0.0189 g of sodium borohydride solid to make 50 mL of 0.1 M sodium borohydride stock solution; weigh 2.0 g of sodium hydroxide solid to make 250 mL of 0.2M sodium hydroxide stock solution ; Measure 50 mL 4.0´10 - 2 M mixed solution of triacids (phosphoric acid, boric acid, acetic acid) and 37.5 mL of 0.2 M sodium hydroxide solution wer...

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Abstract

Disclosed is a pH-regulated method for preparing a silver nano-cluster with a strong fluorescence emission function. According to the method, chromotropic acid 2R dye serves as a stabilizing agent, sodium borohydride serves as a reducing agent, the pH of the synthesized silver nano-cluster is adjusted twice, and the silver nano-cluster with the strong fluorescence emission function and good stability can be obtained. The maximum excitation wavelength of the synthesized silver nano-cluster is 335.0 nm, the maximum fluorescence emission wavelength is 410.0 nm, the grain diameter of the silver nano-cluster mainly ranges from 0.68 nm to 2.99 nm, and the average grain diameter is 1.74 nm. The synthesizing method has the beneficial effects that the synthesized raw material is easy to obtain, the system is simple, the synthesizing is rapid, and the fluorescence property is stable, and large-scale synthesizing can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing silver nano-clusters with strong fluorescence emission through pH control. Background technique [0002] Noble metal nanoclusters have become one of the hotspots in the field of nanomaterials research in recent years due to their small size effect, unique surface effect, electrical and chemical properties. Due to its small size, non-toxicity, and photostability, silver nanoclusters have broad application prospects as a new type of fluorescent probe in the fields of chemical detection, biomarkers, molecular diagnosis, and gene therapy. At present, there are many methods for synthesizing silver nanomaterials, such as chemical reduction method, photoreduction method, template method, radiation method, ultrasonic method, inverse microemulsion method, etc. Further improve. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 龙云飞郭永艳刘豪敏申少华
Owner HUNAN UNIV OF SCI & TECH
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