ag@sio 2 Modification of core-shell structure modified g‑c 3 no 4 Preparation method of photocatalytic fiber

A technology of modification and core-shell structure, applied in chemical instruments and methods, physical/chemical process catalysts, water/sludge/sewage treatment, etc., can solve the problems that the research literature of continuous fibers has not yet been published, and achieve easy recycling Utilization, mild reaction conditions, high raw material utilization

Inactive Publication Date: 2017-10-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, with Ag as the core, SiO 2 Co-modify g-C for the shell 3 N 4 , Preparation of g-C 3 N 4 Research literature on continuous fibers has not yet been published

Method used

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  • ag@sio <sub>2</sub> Modification of core-shell structure modified g‑c <sub>3</sub> no <sub>4</sub> Preparation method of photocatalytic fiber
  • ag@sio <sub>2</sub> Modification of core-shell structure modified g‑c <sub>3</sub> no <sub>4</sub> Preparation method of photocatalytic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example is based on 0.3g of g-C 3 N 4 , AgNO with a mass ratio of 1:7 3 and PVP mixed solution, that is, weigh 0.3g of g-C 3 N 4 , 0.25g AgNO 3 and 1.75g ​​PVP. The specific steps are as follows:

[0023] (1) Add 0.3g of g-C 3 N 4 Add it to 80ml of APAM aqueous solution with a concentration of 0.4-1g / L, adjust the pH value of the dispersion to 1-3 with dilute hydrochloric acid, and disperse evenly by ultrasonication for 30 minutes. The homogeneous mixture was ultrasonically treated for 4 hours, separated by centrifugation, washed with deionized water, and then dispersed into 10ml of PVP aqueous solution with a concentration of 1.7-2g / L to obtain g-C with a concentration of 24.4mg / ml 3 N 4 nanosheet dispersion.

[0024] (2) Dissolve 1.75g ​​of PVP in 100ml of ethylene glycol, and add 0.25g of AgNO 3 , control the temperature so that the temperature of the oil bath reaches 130° C. within 20 to 30 minutes and keep it warm for 1 hour. After cooling down to ...

Embodiment 2

[0031] This example is based on 0.3g of g-C 3 N 4 , AgNO with a mass ratio of 1:6 3 Prepared with the mixed solution of PVP, the difference between its concrete steps and Example 1 is:

[0032] AgNO 3 :PVP was mixed at a mass ratio of 1:6. That is, 1.50g of PVP was dissolved in 100ml of ethylene glycol, and 0.25g of AgNO was added under the conditions of heating and stirring in an oil bath 3 Make it dissolve, control the temperature so that the temperature of the oil bath reaches 130° C. within 20 to 30 minutes, and keep it warm for 1 hour. After cooling down to room temperature, 360 ml of acetone was added to precipitate Ag nanoparticles, which were then centrifuged to obtain Ag nanoparticles.

[0033] According to the analysis method described in Example 1, the degradation rate of X-3B in water by the photocatalytic fiber obtained in this example was measured and calculated.

Embodiment 3

[0035] This example is based on 0.3g of g-C 3 N 4 , AgNO with a mass ratio of 1:5 3 Prepared with the mixed solution of PVP, the difference between its concrete steps and Example 1 is:

[0036] AgNO 3 :PVP was mixed at a mass ratio of 1:5. First, dissolve 1.25g of PVP in 100ml of ethylene glycol, and add 0.25g of AgNO 3 Make it dissolve, control the temperature so that the temperature of the oil bath reaches 130° C. within 20 to 30 minutes, and keep it warm for 1 hour. After cooling down to room temperature, 360 ml of acetone was added to precipitate Ag nanoparticles, which were then centrifuged to obtain Ag nanoparticles.

[0037] According to the analysis method described in Example 1, the degradation rate of X-3B in water by the photocatalytic fiber obtained in this example was measured and calculated.

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Abstract

Disclosed is a preparation method of an Ag@SiO2-core-shell-structure-modified g-C3N4 photocatalysis fiber. The preparation method comprises: (1) dispersing g-C3N4 in an APAM aqueous solution through ultrasonic wave to obtain a dispersion liquid containing g-C3N4 nanoplates; (2) dissolving PVP in glycol, adding AgNO3, adding excess acetone for precipitation of Ag particles, and performing separation to obtain Ag nanoparticles; (3) dispersing the Ag nanoparticles in absolute ethanol, adding deionized water, ammonia water, and a tetraethoxysilane-containing ethanol solution, and performing centrifugation to obtain SiO2-coated Ag nanoparticles; (4) dropwise adding the SiO2-coated Ag nanoparticles and an APAM aqueous solution into the dispersion liquid containing g-C3N4 nanoplates, and performing concentration to obtain a spinning solution; and (5) spinning the spinning solution to obtain a precursor fiber, and allowing the precursor fiber to be subjected to thermal treatment to obtain the Ag@SiO2-modified g-C3N4 fiber photocatalysis material. Through the preparation method, time for layer exfoliation of g-C3N4 is greatly shortened. The obtained photocatalysis fiber material with a water treatment function can be easily recycled and utilized.

Description

technical field [0001] The present invention relates to a kind of Ag@SiO 2 Modified g-C 3 N 4 The invention discloses a method for preparing a fiber semiconductor photocatalytic material, belonging to the technical field of photocatalytic material preparation. Background technique [0002] Under the irradiation of light with a certain energy, the semiconductor photocatalytic material is excited to generate photogenerated electrons and holes, and redox reactions occur with the adsorbed substances on its surface, which can be used to oxidize or even mineralize organic pollutants in water or decompose water The production of hydrogen is an effective way to realize the transformation and utilization of light energy and the purification of water. However, with TiO 2 The representative conventional photocatalyst has a narrow spectral response range due to its wide band gap energy and the photogenerated electron-hole pairs are easily recombined, which limits the wide spectral r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/06C02F1/30C02F101/38
CPCY02W10/37
Inventor 包南胡信德张成禄缪昕翰荚秀艳
Owner SHANDONG UNIV
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