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Method for preparing carbon quantum dots

A technology of carbon quantum dots and deionized water, applied in the field of preparing carbon quantum dots, can solve problems such as element doping, and achieve the effect of enriching resources and broadening the source of raw materials

Inactive Publication Date: 2019-05-21
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports on the preparation of carbon quantum dots using pulp raw materials and the development of their applications, especially the use of a one-pot preparation process to achieve element doping, and the preparation of carbon quantum dots with different functions and different molecular weights.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing carbon quantum dots, said method comprising the pretreatment of raw materials and the preparation of carbon quantum dots, the specific steps are as follows:

[0022] (1) Deflagging of pulp fiber raw materials: Shred 50 g of purchased pulp boards, soak them in water for 30 minutes, decompose in a deflaking machine for 10,000 rpm, wash with distilled water three times, and put them in sealed bags for later use.

[0023] (2) High temperature hydrothermal treatment: take the deionized pulp fiber as raw material, add deionized water to mix, control the absolute dry weight of the deionized pulp fiber: the mass ratio of deionized water is 1:7; suspend the liquid in the pulp fiber raw material Add diammonium hydrogen phosphate to the system, and the mass ratio of the dry weight of the pulp fiber after thawing: diammonium hydrogen phosphate is 1:2. Stir fully for 30 minutes to disperse evenly, and then transfer it to a high-temperature and high-pressure rea...

Embodiment 2

[0028] A method for preparing carbon quantum dots, said method comprising the pretreatment of raw materials and the preparation of carbon quantum dots, the specific steps are as follows:

[0029] (1) Deflagging of pulp fiber raw materials: Take 50g of the purchased pulp board and tear it up, and soak it in water for 30 minutes. After thawing in a deflaking machine for 10,000 revolutions, wash it with distilled water three times, and put it in a sealed bag for later use.

[0030] (2) High temperature hydrothermal treatment: take the deionized pulp fiber as raw material, add deionized water to mix, control the dry weight of the deionized pulp fiber: the mass ratio of deionized water is 1:10; suspend the liquid in the pulp fiber raw material Add diammonium hydrogen phosphate to the system, and the mass ratio of dry weight of the pulp fiber after thawing: diammonium hydrogen phosphate is 1:5. Stir fully for 30 minutes to disperse evenly, and then transfer it to a high-temperature a...

Embodiment 3

[0035] A method for preparing carbon quantum dots, said method comprising the pretreatment of raw materials and the preparation of carbon quantum dots, the specific steps are as follows:

[0036] (1) Deflagging of pulp fiber raw materials: Take 50g of the purchased pulp board and tear it up, and soak it in water for 30 minutes. After thawing in a deflaking machine for 10,000 revolutions, wash it with distilled water three times, and put it in a sealed bag for later use.

[0037] (2) High-temperature hydrothermal treatment: take the deionized pulp fiber as raw material, add deionized water to mix, control the dry weight of the deionized pulp fiber: the mass ratio of deionized water is 1:7; suspend in the pulp fiber raw material Diammonium hydrogen phosphate is added to the liquid system, and the mass ratio of dry weight of pulp fiber after thawing: diammonium hydrogen phosphate is 1:2, fully stirred for 30 minutes to disperse evenly, and then transferred to a high-temperature an...

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PUM

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Abstract

The invention relates to a method for preparing carbon quantum dots. The method comprises pretreatment of a raw material and preparation of the carbon quantum dots, and concretely comprises the following steps: (1) disintegration of a paper pulp fiber raw material; (2) high-temperature hydrothermal treatment; (3) grading dialysis; (4) freeze drying treatment: freeze-drying treatment of a collectedfiltrate, collection, and preservation for obtaining carbon quantum dot solids having different molecular weight cut-offs. The method for preparing the carbon quantum dots with different functions and different molecular weights from the paper pulp fiber raw material broadens the raw material sources of the carbon quantum dots to a certain extent, explores the characteristics and functions of thecarbon quantum dots having different molecular weights, and is in favor of accelerating the research and development of the carbon quantum dots..

Description

technical field [0001] The invention belongs to the technical field of combining biomass resource utilization and environmental protection, in particular to a method for preparing carbon quantum dots. Background technique [0002] The high-value utilization of biomass is of great significance, and it can meet the long-term demand of the market for bio-based materials, in line with the value concept of sustainable development, and has important practical value and application prospects. [0003] In the past decade, carbon quantum dots have become a new generation of carbon-based fluorescent nanomaterials due to their excellent optical properties, non-toxicity, high water solubility, and biocompatibility. At present, there are two ways to synthesize carbon quantum dots, one is the top-down route, including electrochemical oxidation, acid oxidation, arc discharge, and laser ablation; the other is the bottom-up route, such as hydrothermal method , microwave method. In addition...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
Inventor 刘苇张励国侯庆喜王玉
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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