Nano cellulose-reinforced composite photocatalyst as well as preparation method and application thereof

A nanocellulose and photocatalyst technology, applied in the field of material chemistry, can solve the problems of complex catalyst preparation process, difficult to achieve synergistic promotion, and limited modification effect, so as to promote catalytic degradation efficiency, excellent degradation performance, and increase activity site effect

Active Publication Date: 2018-10-30
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

But commonly used Ag-doped modified g-C 3 N 4 The preparation process of the composite catalyst is complicated, and Ag is easy to lose during the high-temperature calcination process, which greatly limits its modification effect, and it is difficult to achieve a synergistic promotion effect by doping with a single non-metal element or metal element

Method used

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  • Nano cellulose-reinforced composite photocatalyst as well as preparation method and application thereof
  • Nano cellulose-reinforced composite photocatalyst as well as preparation method and application thereof
  • Nano cellulose-reinforced composite photocatalyst as well as preparation method and application thereof

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Embodiment 1

[0043] A preparation method of nanocellulose reinforced composite photocatalyst of the present invention, comprising the following steps:

[0044] (1) Get 20g TEMPO oxidized nanocellulose suspension (CNFs, the solid content of cellulose nanofibrils is 0.01wt%, the aspect ratio of nanofibers is about 300-600) and 0.04g silver nitrate, stir and fully dissolve;

[0045] (2) Get 20g of urea and dissolve it in the above-mentioned mixed solution, fully stir and dissolve;

[0046] (3) Place the mixed solution obtained in step (2) in a blast drying oven, and dry at 70° C. for 12 hours to obtain a precursor substance;

[0047] (4) Cover the crucible containing the precursor material with a lid, wrap a layer of tinfoil and place it in a muffle furnace. Calcinate at 550°C for 4 hours in an air atmosphere with a heating rate of 15°C / min. After natural cooling, Nanocellulose-reinforced composite photocatalyst Ag / CNFs / g-C can be obtained 3 N 4 , its XRD pattern and SEM photo are as follo...

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Abstract

The invention discloses a preparation method of a nano cellulose-reinforced composite photocatalyst. The preparation method comprises the following steps: (1) dissolving silver nitrate and urea in a suspension liquid of nano cellulose, and then drying to obtain a precursor substance; (2) calcining the precursor substance at 450 to 600 DEG C under an oxygen or air atmosphere to obtain a nano cellulose-reinforced composite photocatalytic material. The invention further discloses the nano cellulose-reinforced composite photocatalyst prepared with the method and application thereof. According to the invention, the strong chemisorption and physical entanglement effect of abundant carboxyl groups, hydroxyl groups and network structures intertwined with the carboxyl groups and hydroxyl groups onnano cellulose chains on Ag+ are innovatively utilized, and the Ag+ is fixed on the surface of carbonized nitrogen, so that the loss of the Ag+ is reduced; at the same time, carbon doping is achieved;and C and Ag synergistically promote the catalytic degradation efficiency of the carbonized nitrogen significantly.

Description

technical field [0001] The invention belongs to the field of material chemistry, in particular to a nanocellulose-reinforced composite photocatalyst Ag / CNFs / g-C 3 N 4 And its preparation method and application. Background technique [0002] Increasingly serious environmental pollution and energy shortage have become two major problems restricting the development of human society. Finding clean energy and effectively improving environmental pollution are important issues to be solved urgently. Solar energy is considered to be the first choice to replace fossil energy due to its non-polluting, cheap, and huge reserves. Semiconductor catalysts can efficiently convert solar energy into chemical energy, and can be used for catalytic degradation of pollutants in water and photocatalytic hydrogen production. [0003] Carbonized nitrogen (g-C 3 N 4 ) is responsive to visible light, and is used for catalytic production of clean energy and photocatalytic degradation of organic po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/08C02F1/30C02F101/30
CPCB01J27/24B01J35/004B01J37/08B01J37/084C02F1/30C02F2101/30C02F2305/10
Inventor 吴义强卿彦田翠花罗莎李新功赵星李贤军
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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