Preparation method of silicon doping carbon quantum dots by adoption of solvothermal method and applications thereof

A technology of carbon quantum dots and solvothermal method, which is applied in the direction of biochemical equipment and methods, chemical instruments and methods, nano-carbon, etc., can solve problems such as limiting biological science applications, not being environmentally friendly, and emitting wavelength shifts, etc., to achieve easy Popularization, simple preparation process and equipment, good light fastness effect

Inactive Publication Date: 2014-06-04
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although great progress has been made in the preparation of carbon quantum dots, there are still many problems that limit their application in biological sciences
Open issues include: low quantum yield; shift of emission wavelength with excitation wavelength
However, such modification methods are often not environmentally friendly, and in order to obtain relatively pure carbon quantum dots must go through a large amount of desalination process

Method used

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  • Preparation method of silicon doping carbon quantum dots by adoption of solvothermal method and applications thereof
  • Preparation method of silicon doping carbon quantum dots by adoption of solvothermal method and applications thereof
  • Preparation method of silicon doping carbon quantum dots by adoption of solvothermal method and applications thereof

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Embodiment 1

[0024] Embodiment 1: The method for preparing silicon-doped carbon quantum dots by one-step solvothermal method

[0025] Weigh 0.97g of hydroquinone, place it in a 25mL stainless steel high-pressure reactor lined with polytetrafluoroethylene, add 5mL of acetone to dissolve, transfer 1.00mL of silicon tetrachloride into the above-mentioned reactor slowly, and The sealed reaction kettle was placed in a blast drying oven and heated at 200° C. for 2 hours. When the autoclave is cooled to room temperature, the mixed liquid in the autoclave is concentrated and evaporated to dryness by means of rotary evaporation to obtain silicon-doped carbon quantum dots.

[0026] Such as figure 1 TEM imaging shows that silicon-doped carbon quantum dots are monodisperse and uniform spherical, and the particle size is mainly distributed in the range of 5-15nm. Such as figure 2 The high-resolution transmission electron microscope photos in the paper show that silicon-doped carbon quantum dots hav...

Embodiment 2

[0034] Embodiment 2: the method for preparing silicon-doped carbon quantum dots by one-step solvothermal method

[0035] Weigh 0.97g of hydroquinone, place it in a 25mL stainless steel high-pressure reactor lined with polytetrafluoroethylene, add 5mL of acetone to dissolve, pipette 2.00mL of silicon tetrachloride and slowly drop it into the above-mentioned reactor. The sealed reaction kettle was placed in a blast drying oven and heated at 150° C. for 1 hour. When the autoclave is cooled to room temperature, the mixed liquid in the autoclave is concentrated and evaporated to dryness by means of rotary evaporation to obtain boron-doped carbon quantum dots.

[0036] Use the reference method to measure the fluorescence quantum yield, the calculation formula is: Ф=Ф S [(I·A s n 2 ) / (I s ·A·n s 2 )] (Ф represents the quantum yield, I represents the integrated area of ​​the fluorescence emission spectrum under the excitation of the optimal excitation wavelength, A represents th...

Embodiment 3

[0044] Embodiment 3: the method for preparing silicon-doped carbon quantum dots by one-step solvothermal method

[0045] Weigh 0.97g of hydroquinone, place it in a 25mL stainless steel autoclave lined with polytetrafluoroethylene, add 5mL of acetone to dissolve, pipette 3.00mL of silicon tetrachloride and slowly drop it into the above-mentioned reaction kettle. The sealed reaction kettle was placed in a blast oven and heated at 220° C. for 5 hours. When the autoclave is cooled to room temperature, the mixed liquid in the autoclave is concentrated and evaporated to dryness by means of rotary evaporation to obtain silicon-doped carbon quantum dots.

[0046] Use the reference method to measure the fluorescence quantum yield, the calculation formula is: Ф=Ф S [(I·A s n 2 ) / (I s ·A·n s 2 )] (Ф represents the quantum yield, I represents the integrated area of ​​the fluorescence emission spectrum under the excitation of the optimal excitation wavelength, A represents the absorb...

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Abstract

The invention relates to the field of carbon quantum dot preparation, and particularly relates to a preparation method of silicon doping carbon quantum dots by adoption of a solvothermal method and applications thereof. The preparation method includes: adding hydroquinone into a stainless steel high-pressure reactor the liner of which is polytetrafluoroethylene; adding acetone according to a ratio that 5 mL of the acetone is added for per 0.97 g of the hydroquinone; adding dropwise silicon tetrachloride into the reactor, putting the sealed reactor in an air dry oven, heating at 150-220 DEG C for 1-5 h, cooling to room temperature, and concentrating and evaporating the liquid mixture in the reactor to dryness by adoption of a rotary evaporation manner to obtain the silicon doping carbon quantum dots. The preparation method is simple, efficient and mild, and is low in operation cost and simple in preparation process equipment. The prepared silicon doping carbon quantum dots can be applied in cell biological imaging.

Description

technical field [0001] The invention relates to the field of carbon quantum dot preparation, in particular to a method for preparing silicon-doped carbon quantum dots by a one-step solvothermal method and an application thereof. Background technique [0002] Carbon quantum dots are a new type of carbon nanomaterials discovered in recent years, which are dispersed spherical nanoparticles with a size less than 10nm. Due to its unique properties, carbon quantum dots are considered to be a very promising material in optoelectronic devices, sensors, biological imaging and photocatalysts. From the perspective of fluorescent materials, carbon quantum dots have more advantages than traditional organic dyes and semiconductor quantum dots, such as chemical inertness, no light flicker, low toxicity and excellent biocompatibility. Many methods for the synthesis of carbon quantum dots have been developed, such as discharge method, laser ablation method, chemical oxidation method, electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B31/36C12Q1/02C01B32/15
Inventor 丰慧钱兆生单晓月柴鲁静马娟娟
Owner ZHEJIANG NORMAL UNIVERSITY
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