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Anatase titanium dioxide nanoribbons exposing {010} crystal face and preparation method thereof

A technology of titanium dioxide and nanobelts, which is applied in the field of photocatalysis, can solve the problems of low proportion, large pollution in the preparation process, and small specific surface area, and achieve the effects of narrow width, improved photocatalytic activity, and small thickness

Inactive Publication Date: 2016-02-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of low ratio of exposed {010} crystal faces of anatase titanium dioxide, small specific surface area, and high pollution in the preparation process, the present invention provides anatase titanium dioxide nanoribbons with exposed {010} crystal faces and its preparation method

Method used

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  • Anatase titanium dioxide nanoribbons exposing {010} crystal face and preparation method thereof
  • Anatase titanium dioxide nanoribbons exposing {010} crystal face and preparation method thereof
  • Anatase titanium dioxide nanoribbons exposing {010} crystal face and preparation method thereof

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Effect test

Embodiment 1

[0030] 10mmolTiO 2 The powder was mixed evenly with 50ml of 12M NaOH solution, then transferred to a tetrafluoroethylene-lined hydrothermal reaction kettle, placed in an oven at 130°C for 48 hours, cooled to room temperature naturally, and the product in the kettle was poured out, and then the white product was mixed with 5 mmol phenol in 10 M H 2 NO 3 The aqueous solution was subjected to alcohol-assisted self-assembly reaction, then washed with deionized water to PH = 5.5, and dried at 100°C to obtain ultra-thin titanate nanobelts, which were then calcined at 700°C for 1 hour in an air atmosphere to obtain close to 100% exposed {010 } faceted anatase titania nanobelts.

Embodiment 2

[0032] 10mmolTiO 2 The powder was mixed evenly with 50ml of 20M NaOH solution, then transferred to a tetrafluoroethylene-lined hydrothermal reaction kettle, placed in a 120°C oven for hydrothermal reaction for 72 hours, cooled naturally to room temperature, poured out the product in the kettle, and then mixed the white product with The 10M HCl aqueous solution containing 10mmol benzyl alcohol was used for alcohol-assisted self-assembly reaction, then washed with deionized water until pH = 7, and dried at 120°C to obtain ultra-thin titanate nanoribbons, and then calcined at 400°C for 5h in an oxygen atmosphere. That is, the anatase titania nanoribbons with nearly 100% exposed {010} crystal planes were obtained.

Embodiment 3

[0034] 10mmolTiO 2 The powder was mixed evenly with 50ml of 10M NaOH solution, then transferred to a tetrafluoroethylene-lined hydrothermal reaction kettle, placed in a 150°C oven for hydrothermal reaction for 48 hours, cooled to room temperature naturally, and the product in the kettle was poured out, and then the white product was mixed with 0.1M HCl aqueous solution containing 1mmol benzyl alcohol was used for alcohol-assisted self-assembly reaction, then washed with deionized water to pH = 7, dried at 60°C to obtain ultra-thin titanate nanoribbons, and then calcined at 600°C in an oxygen atmosphere After 2h, the anatase titanium dioxide nanobelts with nearly 100% exposed {010} crystal faces were obtained.

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Abstract

The invention discloses titanium dioxide nanoribbons exposing a {010} crystal face and a preparation method thereof; an exposed crystal face, except two end faces, of the titanium dioxide nanoribbons is the {010} crystal face (the exposure rate of the {010} crystal face is close to 100%). The preparation method comprises titanate nanoribbons mainly exposing a {010} crystal face are used as raw material and are roasted at high temperature to prepare the product. The preparation processes of the titanate nanoribbons mainly exposing the {010} crystal face mainly includes four processes: hydrothermal reaction, alcohol assisting self-assembly reaction, water washing and drying. With adopting of the preparation method, not only is the exposure rate of the high-activity {010} crystal face improved, but also the specific surface area of titanium dioxide is increased. The preparation process has no need of use of fluorine-containing reagents and is an environmental-friendly green preparation method. With adopting of the preparation method, the preparation temperature of the titanium dioxide nanoribbons is reduced, and the production energy consumption and the production cost are effectively reduced. At the same time, because the titanium dioxide nanoribbons prepared by the method and exposing nearly 100% of the {010} crystal face have excellent photocatalytic activity, the titanium dioxide nanoribbons can be widely applied in the fields such as photolysis of water, environmental restoration, sensors and nano devices building.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to an anatase titanium dioxide nanobelt with exposed {010} crystal faces and a preparation method thereof. Background technique [0002] Nano-titanium dioxide is a multifunctional semiconductor material, which has a wide range of applications in photocatalysis, dye-sensitized solar cells, gas sensors and nano-devices. The photocatalytic properties and photovoltaic properties of titanium dioxide are related to its morphology, size, specific surface area, and exposed crystal planes. Theoretical calculations and experimental results confirm that: due to the superior surface atomic structure of the {010} crystal plane (100% Ti 5c ) and electronic structure, therefore, anatase titanium dioxide with exposed {010} facets has better photocatalytic activity than exposed {001} and {101} facets (Angew.Chem.Int.Ed.2011,50,2133 ; ACS Appl. Mater. Interfaces, 2013, 5, 1348). However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00
Inventor 罗和安陈烽赵才贤颜德健夏珺
Owner XIANGTAN UNIV
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