A kind of preparation method and application of biomimetic enzyme based on bacterial cellulose
A technology of bacterial cellulose and biomimetic enzymes, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., to achieve strong catalytic performance, easy operation, simple and feasible preparation
Inactive Publication Date: 2020-10-27
SOUTHWEST UNIV
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Problems solved by technology
However, there are few studies on the use of bacterial cellulose to synthesize carbon fiber-based composite materials, and the related research on carbon fiber / manganese oxide composite nanomaterials has not been reported.
Method used
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Embodiment 1
[0033] The schematic diagram of the synthesis steps is as figure 1 As shown, specifically:
[0034] (1) Cut the bacterial cellulose raw material into small pieces of 3cm×3cm×0.5cm, soak in 10% ethanol aqueous solution for 1 hour, and then soak in deionized water for 3 days to remove organic solvents and other impurities.
[0035] (2) Soak bacterial cellulose in 20mM potassium permanganate solution for 1 day under magnetic stirring. Then take it out and wash it with deionized water for 3-5 times to remove excess potassium permanganate to obtain bacterial fiber / potassium permanganate hydrogel.
[0036] (3) Freeze the bacterial cellulose / potassium permanganate hydrogel in liquid nitrogen for 30 minutes, and then freeze-dry it in a freeze-drying oven (-80 °C, 0.021 Mpa) for 24 hours to obtain bacterial fiber / permanganese Potassium aerogel.
[0037] (4) The bacterial cellulose / potassium permanganate airgel was calcined at 800 ºC for 2 hours in a tube furnace (under nitrogen pro...
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Abstract
The invention discloses a preparation method and application of a mimic enzyme based on bacterial cellulose. The preparation method is characterized by comprising the following steps: performing high-temperature carbonization on bacterial cellulose so as to synthesize a carbon fiber, and loading a high-concentration potassium permanganate solution in the bacterial cellulose by virtue of the porousstructure and high water retention capability of the bacterial cellulose and the exchange function of water; further performing freeze-drying so as to obtain bacterial cellulose / potassium permanganate gel; performing high-temperature calcining to carbonize the bacterial cellulose into a carbon fiber, and meanwhile performing high-temperature decomposition on the potassium permanganate, thereby generating manganese oxide nanoparticles. The carbon fiber / manganese oxide composite nano material prepared according to the method is relatively good in mimic enzyme activity, is capable of catalyzingdisproportionated reactions of superoxide anions, can be applied to preparation of superoxide anion sensors and has relatively high application values in the fields of biologics and medicines; in addition, the preparation method is low in cost, simple to operate and convenient in large-scale production, popularization and application.
Description
technical field [0001] The invention relates to a preparation method of a bionic enzyme of bacterial cellulose, which uses natural bacterial cellulose loaded with potassium permanganate to form a carbon fiber / manganese oxide composite nanofiber material through high-temperature calcination, and belongs to the technology of polymer-based functional composite materials. Background technique [0002] Carbon fiber is a new type of carbon-based nanomaterial with excellent mechanical strength, large volume-to-mass ratio, and porous network structure. Carbon fibers have nanometer-sized diameters and have the general properties of nanomaterials. The boundary sites on the surface of carbon fibers can promote surface electron transfer for electrochemical devices or electrochemical analysis. There are many methods for preparing carbon fibers, among which the most commonly used method is electrospinning, which can synthesize nanofibers with a diameter of several nanometers to several mi...
Claims
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IPC IPC(8): B01J23/34B01J35/06B01J37/03B01J37/32B01J37/08G01N27/26
CPCB01J23/34B01J35/0013B01J35/006B01J35/06B01J37/036B01J37/084B01J37/088B01J37/32G01N27/26
Inventor 王斌翁博丁艾玲
Owner SOUTHWEST UNIV