A detection paper containing nitrogen-doped carbon quantum dots and its preparation method and application

A technology of carbon quantum dots and detection paper, which is applied to the detection paper containing nitrogen-doped carbon quantum dots and its preparation, and the application field of detection of metal cations in wastewater, which can solve the problems of cumbersome operation and little significance, and achieve color development Good performance, avoid coagulation and sedimentation, strong acid and alkali resistance

Active Publication Date: 2022-06-24
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the common method for detecting the content of metal cations in wastewater is to add wastewater to carbon quantum dot solution, and then measure the fluorescence spectrum of the solution. doesn't mean much

Method used

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  • A detection paper containing nitrogen-doped carbon quantum dots and its preparation method and application
  • A detection paper containing nitrogen-doped carbon quantum dots and its preparation method and application
  • A detection paper containing nitrogen-doped carbon quantum dots and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0040] A detection paper containing nitrogen-doped carbon quantum dots, the preparation method comprising the following steps:

[0041] Add 83.3g of L-histidine and 40g of deionized water to the beaker, stir until L-histidine is completely dissolved, then add 16.7g of hardwood cellulose, stir and disperse, and then place it in a KH3200E ultrasonic cleaner, Ultrasonic for 10min, then transfer to XH100B microwave catalytic synthesis / extraction instrument, adjust the reaction power to 800W, react for 6min, then transfer to TG16-WS desktop high-speed centrifuge, adjust the speed to 6000r / min, carry out differential centrifugation and remove the upper The clear liquid is then vacuum filtered with SHZ-D (III) circulating water vacuum pump, and the filtered product is washed with water, and then dried with a 101-type electric heating blast drying oven to obtain nitrogen-doped carbon quantum dots. test paper.

[0042] Performance Testing:

[0043] 1) A few drops of iron ion concentr...

Embodiment 2

[0055] A detection paper containing nitrogen-doped carbon quantum dots, the preparation method comprising the following steps:

[0056] Add 83.3g of L-histidine and 40g of deionized water to the beaker, stir until L-histidine is completely dissolved, then add 16.7g of softwood cellulose, stir and disperse, and then place it in a KH3200E ultrasonic cleaner, Ultrasonic for 10min, then transfer to XH100B microwave catalytic synthesis / extraction instrument, adjust the reaction power to 800W, react for 6min, then transfer to TG16-WS desktop high-speed centrifuge, adjust the speed to 6000r / min, carry out differential centrifugation and remove the upper The clear liquid is then vacuum filtered with SHZ-D (III) circulating water vacuum pump, and the filtered product is washed with water, and then dried with a 101-type electric heating blast drying oven to obtain nitrogen-doped carbon quantum dots. test paper.

[0057] After testing, the microstructure, color rendering effect and stor...

Embodiment 3

[0059] A detection paper containing nitrogen-doped carbon quantum dots, the preparation method comprising the following steps:

[0060] Add 83.3g of L-histidine and 40g of deionized water to the beaker, stir until L-histidine is completely dissolved, then add 16.7g of corn husk cellulose, stir and disperse, and then place it in a KH3200E ultrasonic cleaner , ultrasonic for 10min, then transferred to XH100B microwave catalytic synthesis / extraction instrument, adjusted reaction power to 800W, reacted for 6min, then transferred to TG16-WS desktop high-speed centrifuge, adjusted to 6000r / min, and removed after differential centrifugation The supernatant is then vacuum filtered with SHZ-D (III) circulating water vacuum pump, and the filtered product is washed with water, and then dried in a 101-type electric heating blast drying oven to obtain nitrogen-doped carbon quantum point detection paper.

[0061] After testing, the microstructure, color rendering effect and storage stabili...

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Abstract

The invention discloses a detection paper containing nitrogen-doped carbon quantum dots, a preparation method and an application thereof. The detection paper containing nitrogen-doped carbon quantum dots of the present invention is made of the following raw materials in mass percentage: cellulose: 9%-50%; amino acid: 50%-91%. The preparation method of the detection paper containing nitrogen-doped carbon quantum dots of the present invention comprises the following steps: first dispersing cellulose and amino acid in a solvent, then performing microwave reaction, suction filtration and drying, to obtain nitrogen-doped carbon quantum dots test paper. The detection paper containing nitrogen-doped carbon quantum dots of the present invention can be used to detect whether metal cations in wastewater exceed the standard, and has the advantages of high luminous intensity, good color rendering, fast detection speed and good stability, and its preparation method is simple , Green and environmental protection, suitable for large-scale promotion and application.

Description

technical field [0001] The invention relates to the technical field of metal ion detection, in particular to a detection paper containing nitrogen-doped carbon quantum dots, a preparation method thereof, and an application for detecting metal cations in wastewater. Background technique [0002] Quantum dots are an important low-dimensional semiconductor material, and their dimensions in three dimensions are not greater than twice the exciton Bohr radius of the corresponding semiconductor material. Quantum dots are generally spherical or quasi-spherical, and the diameter is usually between 2 nm and 20 nm. Quantum dots are nano-scale semiconductors. By applying a certain electric field or light pressure to this nano-semiconductor material, they will emit light of a specific frequency, and the frequency of light will change with the size of the semiconductor. Adjusting the size of this nanosemiconductor can control the color of the light it emits. [0003] Common quantum dots...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H23/04D21H21/30D21H17/18C09K11/65C09K11/02B82Y20/00B82Y40/00G01N21/64
CPCD21H27/00D21H23/04D21H21/30D21H17/18C09K11/65C09K11/0883C09K11/025B82Y20/00B82Y40/00G01N21/643G01N2021/6432G01N31/22G01N21/6489G01N21/77G01N2021/7759G01N2021/7786B82Y30/00G01N33/1813
Inventor 陈奇峰熊洁怡王茹陈广学韦丽婷王韵嘉
Owner SOUTH CHINA UNIV OF TECH
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