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Zinc selenide ultrathin nanoribbon and anion exchange method for preparing same

A nanobelt and zinc selenide technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of reducing application potential, low sunlight utilization rate, utilization, etc., achieving huge application potential and application value, The effect of excellent photohydrogen production performance

Active Publication Date: 2018-01-12
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in the field of photohydrogen production, the too wide band gap (~3.7eV) of ZnS cannot be utilized by visible light, which leads to its low solar light utilization efficiency and reduces its application potential in photocatalytic hydrogen production.
In order to reduce the band gap of zinc sulfide and improve its catalytic hydrogen production efficiency under visible light, methods such as metal ion doping, cation exchange, and heterostructure growth have been introduced to effectively improve the photocatalytic hydrogen production performance of the material. However, methods to directly convert ZnS into porous ZnSe nanomaterials to lower the bandgap have been rarely reported.

Method used

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  • Zinc selenide ultrathin nanoribbon and anion exchange method for preparing same
  • Zinc selenide ultrathin nanoribbon and anion exchange method for preparing same
  • Zinc selenide ultrathin nanoribbon and anion exchange method for preparing same

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preparation example Construction

[0073] In another embodiment of the preparation of zinc selenide ultrathin nanobelts of the present invention, the molar content of the ultrathin zinc sulfide / diethylenetriamine hybrid nanobelts used in the first step is 0.1-0.3mmol, water The volume is 10-15ml.

[0074] In another embodiment of preparing zinc selenide ultrathin nanobelts of the present invention, the molar content of sodium selenite in the second step is 1.75-3 times that of ultrathin zinc selenide / diethylenetriamine hybrid nanobelts , 85% hydrazine hydrate is added in a volume of 3-10ml.

[0075] 2) The second aspect of the present invention is to provide a zinc selenide / molybdenum disulfide heterogeneous nanobelt and a preparation method thereof.

[0076] The zinc selenide / molybdenum disulfide heterogeneous nanoribbon of the present invention presents a nanoribbon structure with a length of 5-10 μm and a width of 17-19 nm, and the surface of the ultrathin nanoribbon has an obvious pore structure, and in M...

Embodiment 1

[0091] Preparation of ZnS / Diethylenetriamine Hybrid Nanobelts

[0092] Add 1mmol of Zn(NO 3 ) 2 ·6H 2 O, and add 75ml of fresh, dry diethylenetriamine, vigorously stir and sonicate to dissolve the zinc salt; then add 1mmol of thiourea to the mixed solution and sonicate and stir to dissolve it; transfer the resulting dispersion to 125ml A single-necked flask connected to a 35cm air condenser, heated in an oil bath at 220°C for 3h, then cooled to room temperature naturally; further filtered and washed with filter paper and freeze-dried at about -70°C to obtain zinc sulfide / diethylenetriamine Hybrid ultrathin nanoribbons.

[0093] Preparation of Porous ZnSe Ultrathin Nanobelts

[0094] Weigh 19.5mg of ultra-thin zinc sulfide / diethylenetriamine hybrid nanoribbon, add it to a 50ml centrifuge tube, add 15ml of deionized water, ultrasonically shake until completely dissolved, then add 69.2mg of sodium selenite to the mixture and 5ml of hydrazine hydrate, sonicate and vibrate unt...

Embodiment 2

[0096] The difference between this embodiment and the specific example 1 is that the mass of the ultra-thin zinc sulfide / diethylenetriamine hybrid nanobelt is changed to 26mg, then the volume of deionized water is added to 10ml, hydrazine hydrate is 8ml, and the reaction temperature is changed to 185 ℃.

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Abstract

The invention provides a zinc selenide ultrathin nanoribbon and an anion exchange method for preparing the same. The zinc selenide ultrathin nanoribbon is of an ultrathin ribbon structure with the length being 5-10mu m, the width being 17-19nm and the thickness being less than 5nm, and a conspicuous porous structure is formed on the surface of the zinc selenide ultrathin nanoribbon. In addition, the invention further provides a zinc selenide / molybdenum disulfide heterogeneous nanoribbon which is prepared from the zinc selenide ultrathin nanoribbon as a raw material, and a preparation method ofthe zinc selenide / molybdenum disulfide heterogeneous nanoribbon. The zinc selenide nanoribbon provided by the invention is good in water solubility, dispersibility and photonic hydrogen production catalysis activity; and due to the heterogeneous structure molybdenum disulfide, the photocatalytic performance is further remarkably improved.

Description

technical field [0001] The invention belongs to the field of preparation of nanomaterials, in particular to a zinc selenide ultrathin nanobelt and an anion exchange method for preparing the zinc selenide ultrathin nanobelt, and uses the zinc selenide ultrathin nanobelt as a precursor The corresponding ZnSe / MoS2 heterogeneous nanobelts were prepared. Background technique [0002] As a very important II-VI semiconductor material, zinc sulfide has aroused extensive research interests of scientists due to its broad development prospects and application potential in the fields of electrocatalysis, photocatalysis, and electroluminescence. However, in the field of photohydrogen production, the too wide band gap (~3.7eV) of ZnS cannot be utilized by visible light, resulting in its low solar light utilization efficiency and reducing its application potential in photocatalytic hydrogen production. In order to reduce the band gap of zinc sulfide and improve its catalytic hydrogen prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00B82Y40/00B01J23/06B01J27/051B01J27/057C01B3/02
Inventor 俞书宏姚宏斌马涛苏廷玉张天文周飞
Owner UNIV OF SCI & TECH OF CHINA
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