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Method for inducing and synthesizing TiO2-ZnO by adsorbing enzyme on functionalized graphene oxide

A graphene oxide, oxide technology, applied in the field of nanomaterials, biomimetic mineralization

Inactive Publication Date: 2013-07-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among these materials, titanium dioxide and zinc oxide have potential applications in photocatalysts, photovoltaic cells, solar cells and sensors, but a single material is difficult to meet the almost demanding application requirements, so the preparation of composite materials of titanium dioxide and zinc oxide has become our research important objects of

Method used

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  • Method for inducing and synthesizing TiO2-ZnO by adsorbing enzyme on functionalized graphene oxide
  • Method for inducing and synthesizing TiO2-ZnO by adsorbing enzyme on functionalized graphene oxide
  • Method for inducing and synthesizing TiO2-ZnO by adsorbing enzyme on functionalized graphene oxide

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Experimental program
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Effect test

Embodiment 1

[0018] 1. Adsorb 5mL solvent green (8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt, SG, 0.5g / L) on 20mL graphene oxide ( GO, 0.5g / L), after magnetic stirring for 12h, the residual solvent green in the solution was washed by centrifugation with deionized water, and this was repeated three times to obtain functionalized graphene oxide.

[0019] 2. Adsorb 20mL lysozyme (Loy, 1g / L) on the 20mL functionalized graphene oxide (SG‐GO, 0.5g / L) in step 1. under the above mild environment by electrostatic attraction, and stir magnetically After 0.5 h, the remaining Loy in the solution was washed by centrifugation with deionized water, and the process was repeated three times to obtain a composite soft template of functionalized graphene oxide and lysozyme.

[0020] 3. Disperse the composite template of functionalized graphene oxide and lysozyme in step 2. in a certain amount of deionized water under the above-mentioned mild environmental conditions. After the ultrasonic wave is un...

Embodiment 2

[0023] 1. Adsorb 10mL solvent green (8-hydroxy-1,3,6-pyrene trisulfonic acid trisodium salt, SG, 0.5g / L) on 20mL graphene oxide ( GO, 0.5g / L), after magnetic stirring for 12h, the residual solvent green in the solution was washed by centrifugation with deionized water, and this was repeated three times to obtain functionalized graphene oxide.

[0024] 2. Adsorb 20mL lysozyme (Loy, 1g / L) on the 20mL functionalized graphene oxide (SG‐GO, 0.5g / L) in step 1. under the above mild environment by electrostatic attraction, and stir magnetically After 0.5 h, the remaining Loy in the solution was washed by centrifugation with deionized water, and this was repeated three times to obtain a composite soft template (GO-SG-Loy) of functionalized graphene oxide and lysozyme.

[0025] 3. Disperse the composite template of functionalized graphene oxide and lysozyme in step 2. in a certain amount of deionized water under the above-mentioned mild environmental conditions. After the ultrasonic wav...

Embodiment 3

[0028]1. Adsorb 20mL solvent green (8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt, SG, 0.5g / L) on 20mL graphene oxide ( GO, 0.5g / L), after magnetic stirring for 12h, the residual solvent green in the solution was washed by centrifugation with deionized water, and this was repeated three times to obtain functionalized graphene oxide.

[0029] 2. Adsorb 20mL lysozyme (Loy, 1g / L) on the 20mL functionalized graphene oxide (SG‐GO, 0.5g / L) in step 1. under the above mild environment by electrostatic attraction, and stir magnetically After 0.5 h, the remaining Loy in the solution was washed by centrifugation with deionized water, and this was repeated three times to obtain a composite soft template (GO-SG-Loy) of functionalized graphene oxide and lysozyme.

[0030] 3. Disperse the composite template of functionalized graphene oxide and lysozyme in step 2. in a certain amount of deionized water under the above-mentioned mild environmental conditions. After the ultrasonic wave ...

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Abstract

The invention relates to a method for inducing and synthesizing TiO2-ZnO by adsorbing enzyme on functionalized graphene oxide, belonging to the technical fields of organism biomimetic mineralization and nanometer materials. The method comprises the steps of: firstly adsorbing biomacromolecules (lysozyme and Loy) on the functionalized graphene oxide (SG-GO) as a composite template, secondly, inducing an organic titanium {dihydroxybis[2-hydroxypropanoato-o1,o2]-titanate diammonium} precursor water solution for hydrolyzing and producing TiO2 to embed urease therein, and thirdly adding urea at room temperature so as to be decomposed under the action of the Urease, thereby providing a local high-alkaline environment to mineralize the zinc source [Zn(NO3)2] precursor near the urease to obtain a target product TiO2-ZnO binary metal oxide. The urease is embedded in the titanium dioxide, thereby providing favorable conditions for the local high-alkaline environment in the next step of catalyzing urea.

Description

technical field [0001] The invention relates to a method of obtaining binary metal oxide (TiO 2 -ZnO), which belongs to the technical field of biomimetic mineralization and the technical field of nanomaterials. Background technique [0002] With the rapid development of society, the increasingly serious energy supply and demand and environmental pollution have become the bottleneck restricting social development. Therefore, it is urgent to develop new energy sources and invent new materials. However, the traditional method of preparing inorganic materials will cause certain pollution to the environment. Therefore, compared with the traditional method of preparing inorganic materials, biomolecules derived from the concept of biomineralization induce the synthesis of various inorganic materials in vitro under mild conditions. We provide a novel synthetic route that is green and energy-saving. Therefore, researchers hope to use biomolecules (such as proteins (including enzyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00
Inventor 郝波王啸波陈戈
Owner BEIJING UNIV OF TECH
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