A preparation method of c/n co-doped porous cuprous oxide nanospheres based on sericin

A technology of sericin and cuprous oxide, which is applied in the fields of nanotechnology, copper oxide/copper hydroxide, and nanotechnology for materials and surface science, can solve the problem of low catalytic efficiency of cuprous oxide nanomaterials, and achieve Improve photocatalytic efficiency, process stability, and good reproducibility

Active Publication Date: 2016-08-24
ZHEJIANG SCI-TECH UNIV
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  • Description
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Problems solved by technology

[0005] In view of the problems that the catalytic efficiency of cuprous oxide nanomaterials prepared in the prior art is not high, the preparation process mostly adopts high-temperature hydrothermal method and needs to use various surfactants, etc., the purpose of the present invention is to provide a monodisperse C / N co-doped Preparation method of heteroporous cuprous oxide nanospheres

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  • A preparation method of c/n co-doped porous cuprous oxide nanospheres based on sericin
  • A preparation method of c/n co-doped porous cuprous oxide nanospheres based on sericin
  • A preparation method of c/n co-doped porous cuprous oxide nanospheres based on sericin

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Embodiment 1

[0024] (1) Preparation of cuprous oxide-sericin composite nanospheres: dissolving sericin with a molecular weight of 1 000 in water to prepare a sericin solution with a concentration of 5 wt %; Add the solution into 100mL of copper sulfate solution with a concentration of 0.1mol / L, and after mixing evenly under magnetic stirring, adjust the pH value of the above-mentioned sericin-copper sulfate mixed solution to 8 with 1M NaOH solution; The ratio is 3:2, adding glucose reducing agent to react for 0.5h, centrifuging at 12000rpm for 10min to collect the precipitate, washing by centrifugation and then drying to obtain cuprous oxide-sericin composite nanospheres;

[0025] (2) Preparation of C / N co-doped porous cuprous oxide nanospheres: the cuprous oxide-sericin composite nanospheres obtained in step (1) were placed in a tube furnace, and under the protection of argon, the The temperature was raised to 400°C at a rate of °C / min, kept at a constant temperature for 2 hours, and cool...

Embodiment 2

[0027] (1) Preparation of cuprous oxide-sericin composite nanospheres: dissolving sericin with a molecular weight of 8000 in water to prepare a sericin solution with a concentration of 2wt%; Add the solution into 100mL of copper nitrate solution with a concentration of 0.3mol / L, and after mixing evenly under magnetic stirring, adjust the pH value of the above-mentioned sericin-copper nitrate mixed solution to 10 with 1M NaOH solution; The ratio is 2:2, adding glucose reducing agent to react for 1 hour, centrifuging at 12 000 rpm for 10 minutes to collect the precipitate, washing by centrifugation and drying to obtain cuprous oxide-sericin composite nanospheres;

[0028] (2) Preparation of C / N co-doped porous cuprous oxide nanospheres: the cuprous oxide-sericin composite nanospheres obtained in step (1) were placed in a tube furnace, and under the protection of argon, the The temperature was raised to 400°C at a rate of °C / min, kept at a constant temperature for 2 hours, and co...

Embodiment 3

[0030] (1) Preparation of cuprous oxide-sericin composite nanospheres: dissolve sericin with a molecular weight of 20,000 in water to prepare a sericin solution with a concentration of 0.5 wt %; Add the protein solution into 100 mL of copper acetate solution with a concentration of 0.1 mol / L, mix evenly under magnetic stirring, and adjust the pH value of the above-mentioned sericin-copper acetate mixed solution to 11 with 1M NaOH solution; The molar ratio is 1:2, adding glucose reducing agent to react for 3 hours, centrifuging at 12 000 rpm for 10 minutes to collect the precipitate, washing by centrifugation and drying to obtain cuprous oxide-sericin composite nanospheres;

[0031] (2) Preparation of C / N co-doped porous cuprous oxide nanospheres: the cuprous oxide-sericin composite nanospheres obtained in step (1) were placed in a tube furnace, and under the protection of argon, the The temperature was raised to 500°C at a rate of °C / min, kept at a constant temperature for 2 h...

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Abstract

The invention discloses a preparation method for C / N co-doped porous cuprous oxide nanospheres based on sericin protein. In a processing procedure of a cocoon filament industry, waste sericin protein is taken as a template and a C / N source, and glucose is taken as a reducing agent, and cuprous-oxide-sericin-protein composite nanospheres are prepared by adopting the chemical precipitation method; the prepared nanospheres are calcined at a high temperature, so that mono-dispersed C / N co-doped porous cuprous oxide nanospheres are obtained. The preparation method does not depend on a surface active agent, and the operation conditions are mild, simple and feasible; furthermore, the technology is stable, and the reproducibility is good; the forbidden band width of the obtained cuprous oxide can be effectively regulated through the doping of C / N elements; a porous nanoscale spherical structure can not only accelerate electron transportation, but also provide the cuprous oxide with large specific surface area which facilitates the enrichment of target objects; the preparation method is expected to be applied to performing photo-catalytic degradation on organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a porous cuprous oxide nanomaterial, in particular to a method for preparing C / N co-doped porous cuprous oxide nanospheres using sericin as a template and a C / N source . Background technique [0002] Cuprous oxide (Cu 2 O) is a typical p-type semiconductor material with a forbidden band width of 2.0-2.2eV, can be excited by 620nm visible light, and the energy conversion rate can theoretically reach 18%. Under the irradiation of sunlight, cuprous oxide can decompose water to produce hydrogen and oxygen, and has good catalytic activity. In addition, cuprous oxide is non-toxic and has low preparation cost, so it has a wide range of applications in solar cells, gas sensors, photocatalysts, lithium ion battery electrode materials and other fields. However, currently Cu 2 O still has limitations in practical applications: Cu 2 The recombination probability of photog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02B82Y30/00B82Y40/00
Inventor 刘琳姚菊明陈杏
Owner ZHEJIANG SCI-TECH UNIV
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