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Fluorescent wood sponge, preparation method thereof and application of fluorescent wood sponge in hexavalent chromium ion detection and adsorption

A technology of wood sponge and sponge, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of single function, complicated preparation, high cost, etc. Effects on cost and energy consumption

Active Publication Date: 2021-09-07
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of single functionalization, complex preparation and high cost of existing hexavalent chromium ion detection and adsorption materials, the present invention provides a fluorescent wood sponge, its preparation method and its application in hexavalent chromium ion detection and adsorption

Method used

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  • Fluorescent wood sponge, preparation method thereof and application of fluorescent wood sponge in hexavalent chromium ion detection and adsorption
  • Fluorescent wood sponge, preparation method thereof and application of fluorescent wood sponge in hexavalent chromium ion detection and adsorption
  • Fluorescent wood sponge, preparation method thereof and application of fluorescent wood sponge in hexavalent chromium ion detection and adsorption

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Embodiment 1

[0066] This embodiment provides a fluorescent wood sponge and a preparation method thereof.

[0067] The fluorescent wood sponge provided in this embodiment includes a modified wood sponge and carbon quantum dots loaded on the modified wood sponge, wherein the mass ratio of the carbon quantum dots to the modified wood sponge is 1:10.

[0068] The preparation method of the fluorescent wood sponge provided by the present embodiment comprises the steps:

[0069] Step 1. Prepare wood sponge:

[0070] Cut the balsa wood into 25mm long, 25mm wide, 5mm thick and 2g wooden blocks perpendicular to the growth direction of the tree, soak 2g of the wooden blocks in 65mL of 1wt% sodium chlorite solution, add 0.5mL equal volume and mix Adjust the pH of the reaction system to 4.5 with a mixture of glacial acetic acid and formic acid, seal the reaction system and place it at 75°C for 1 hour. After the reaction, replace it with a new acidic sodium chlorite solution to continue the treatment. ...

Embodiment 2

[0082] This embodiment provides a fluorescent wood sponge and a preparation method thereof.

[0083] The fluorescent wood sponge provided in this embodiment includes a modified wood sponge and carbon quantum dots loaded on the modified wood sponge, wherein the mass ratio of the carbon quantum dots to the modified wood sponge is 3:10.

[0084] The preparation method of the fluorescent wood sponge provided by the present embodiment comprises the steps:

[0085] Step 1. Prepare wood sponge:

[0086] Cut the balsa wood into 25mm long, 25mm wide, 5mm thick and 2g wooden blocks perpendicular to the growth direction of the tree, soak 2g of the wooden blocks in 65mL of 1wt% sodium chlorite solution, add 0.5mL equal volume of Adjust the pH of the reaction system to 5.0 with a 2:1 mixture of glacial acetic acid and formic acid. Seal the reaction system and place it at 75°C for 1 hour. After the reaction, replace with a new acidic sodium chlorite solution and continue the process. Repea...

Embodiment 3

[0094] This embodiment provides a fluorescent wood sponge and a preparation method thereof.

[0095] The fluorescent wood sponge provided in this embodiment includes a modified wood sponge and carbon quantum dots loaded on the modified wood sponge, wherein the mass ratio of the carbon quantum dots to the modified wood sponge is 5:10.

[0096] The preparation method of the fluorescent wood sponge provided by the present embodiment comprises the steps:

[0097] Step 1. Prepare wood sponge:

[0098] Cut the balsa wood into 25mm long, 25mm wide, 5mm thick and 2g wooden blocks perpendicular to the tree growth direction, soak 2g wooden blocks in 65mL 0.5wt% sodium chlorite solution, add 0.5mL equal volume Adjust the pH of the reaction system to 5.5 for a 3:1 mixture of glacial acetic acid and formic acid. Seal the reaction system and place it at 70°C for 3 hours. After the reaction, replace with a new acidic sodium chlorite solution and continue the process. Repeat the process. Fo...

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Abstract

The invention relates to a fluorescent wood sponge, a preparation method thereof and an application of the fluorescent wood sponge in hexavalent chromium ion detection and adsorption, and belongs to the technical field of heavy metal pollution prevention and control materials. In order to solve the problems that an existing hexavalent chromium ion detection and adsorption material is single in function, complex in preparation and high in cost, the fluorescent wood sponge is provided and comprises a modified wood sponge and carbon quantum dots loaded on the modified wood sponge, and the mass ratio of the carbon quantum dots to the modified wood sponge is 1:10-9:10. According to the fluorescent wood sponge and the preparation method thereof, the carbon quantum dots and the wood sponge are combined, the constructed fluorescent wood sponge simultaneously realizes double functions of detection and adsorption removal of hexavalent chromium ions, an obvious ultraviolet light quenching phenomenon can be observed in a low-concentration hexavalent chromium ion aqueous solution, and the maximum adsorption quantity of the hexavalent chromium ions reaches 450.5 mg / g. The fluorescent wood sponge simplifies the treatment process of sewage containing hexavalent chromium ions, reduces the treatment cost and energy consumption, and has a huge application prospect.

Description

technical field [0001] The invention belongs to the technical field of heavy metal pollution prevention and control materials, and in particular relates to a fluorescent wood sponge, its preparation method and its application in the detection and adsorption of hexavalent chromium ions. Background technique [0002] Sewage containing heavy metal ions poses a major threat to environmental sustainability and human health, among which hexavalent chromium ion has become one of the most harmful heavy metal pollution due to its highly toxic, carcinogenic and mutagenic properties. Accurate detection of hexavalent chromium ion content in water and efficient removal of hexavalent chromium ion pollution in water have become the key to the treatment of heavy metal pollution in water. [0003] The commonly used detection methods for hexavalent chromium ions include fluorescence detection method, electrochemical method and colorimetric method. The fluorescence detection method can easily...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/02G01N21/64
CPCC09K11/65C09K11/02G01N21/64
Inventor 郑丁源张彦华肖泽芳王永贵姚文瑞孙策谭海彦薛磊
Owner NORTHEAST FORESTRY UNIVERSITY
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