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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

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

[0022] (1) Decomposition of pulp fiber raw materials: Shred 50 g of the purchased pulp board, soak in water for 30 minutes, decompose for 10,000 rpm in a deburring machine, wash three times with distilled water, and put it into a sealed bag for 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; in the pulp fiber raw material suspension liquid Diammonium hydrogen phosphate is added to the system, and the absolute dry weight of the pulp fiber after dissolving: the mass ratio of diammonium hydrogen phosphate is 1:2, fully stirred for 30 minutes to make it evenly dispersed, and then transferr...

Example Embodiment

[0027] Example 2

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

[0029] (1) Decomposition of pulp fiber raw materials: take 50g of the purchased pulp board and shred it, soak it in water for 30 minutes, decompose it in a deburring machine for 10,000 revolutions, wash it three times with distilled water, and put it in a sealed bag for use.

[0030] (2) High-temperature hydrothermal treatment: take the deionized pulp fiber as the raw material, add deionized water to mix, and control the absolute dry weight of the deionized pulp fiber: the mass ratio of deionized water is 1:10; in the pulp fiber raw material suspension liquid Diammonium hydrogen phosphate was added to the system, and the absolute dry weight of the pulp fiber after dissolving: the mass ratio of diammonium hydrogen phosphate was 1:5, fully stirred for 30 minutes to make it...

Example Embodiment

[0034] Example 3

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

[0036] (1) Decomposition of pulp fiber raw materials: take 50g of the purchased pulp board and shred it, soak it in water for 30 minutes, decompose it in a deburring machine for 10,000 revolutions, wash it three times with distilled water, and put it in a sealed bag for use.

[0037] (2) High temperature hydrothermal treatment: take the deionized pulp fiber as raw material, add deionized water to mix, control and control the absolute dry weight of the deionized pulp fiber: the mass ratio of deionized water is 1:7; Diammonium hydrogen phosphate is added to the liquid system, and the absolute dry weight of the pulp fiber after dissolving: the mass ratio of diammonium hydrogen phosphate is 1:2, fully stirred for 30 minutes to make it evenly dispersed, and then transferred t...

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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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