Graphene load tungsten trioxide (WO3) nanowire composite material and preparation method thereof

A technology of composite materials and nanowires, applied in the field of graphene-loaded WO3 nanowire composite materials and its preparation, to achieve the effects of cheap reagents, simple formation process, and large-scale preparation

Inactive Publication Date: 2012-07-04
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of graphene-supported tungsten oxide nanowire composites by photocatalytic reduction has not been reported.

Method used

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  • Graphene load tungsten trioxide (WO3) nanowire composite material and preparation method thereof
  • Graphene load tungsten trioxide (WO3) nanowire composite material and preparation method thereof
  • Graphene load tungsten trioxide (WO3) nanowire composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of graphite oxide. Add 2g of graphite powder to potassium persulfate (1g) and concentrated sulfuric acid solution (15mL) of phosphorus pentoxide (1g) at 80°C, pre-oxidize for 6 hours, then cool to room temperature, filter with suction, and wash until neutral. Add pre-oxidized graphite powder (2g) to 50mL of concentrated sulfuric acid solution at 0°C, then slowly add 6g of potassium permanganate, then react at 35°C for 2 hours, and finally slowly add 100mL of deionized water and 20mL of 30% hydrogen peroxide terminated the reaction, suction filtered, washed, and dialyzed to obtain graphite oxide, whose XRD pattern is shown in figure 2 ;

[0036] (2) WO 3 Preparation of nanowires. Add 3.32g of sodium tungstate to 60mL of distilled water, stir at room temperature for 10 minutes, then slowly add 6mol / L hydrochloric acid dropwise to adjust the pH of the solution to 1.5, then transfer to a 100mL hydrothermal reactor, and react at 180°C for 24 hours , suct...

Embodiment 2

[0040] (1) with the step (1) in the implementation example 1;

[0041] (2) with the step (2) in the implementation example 1;

[0042] (3) Preparation of graphite oxide dispersion. Ultrasonic disperse 100mg of graphite oxide in 70mL of absolute ethanol for 1.5 hours;

[0043] (4) Combine the WO obtained in step (2) and step (3) 3 The nanowires were mixed with the graphite oxide dispersion, then transferred to a photocatalytic reactor, subjected to photocatalytic reduction under simulated sunlight for 1.5 hours, filtered, washed, and dried in vacuum at 80°C for 12 hours to obtain graphene-loaded WO 3 nanowire nanocomposites.

Embodiment 3

[0045] (1) with the step (1) in the implementation example 1;

[0046] (2) with the step (2) in the implementation example 1;

[0047] (3) Preparation of graphite oxide dispersion. Ultrasonic disperse 200mg of graphite oxide in 70mL of absolute ethanol for 1.5 hours;

[0048] (4) Combine the WO obtained in step (2) and step (3) 3 The nanowires were mixed with the graphite oxide dispersion, then transferred to a photocatalytic reactor, subjected to photocatalytic reduction under simulated sunlight for 1.5 hours, filtered, washed, and dried in vacuum at 80°C for 12 hours to obtain graphene-loaded WO 3 nanowire nanocomposites.

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Abstract

The invention discloses a graphene load tungsten trioxide (WO3) nanowire composite material and a preparation method thereof, which belong to the field of new materials. The nano composite material has a one-dimensional composite structure and a two-dimensional nano composite structure, the diameter of a WO3 nanowire is 10-30 nanometers, the length of the WO3 nanowire is 50-600 nanometers, and the WO3 nanowire penetrates through or is distributed on the inner layer or the surface of a layer-shaped grapheme main material. The preparation method comprises utilizing a two-dimensional grapheme as an auxiliary material and sodium tungstate as a tungsten source, generating the WO3 nanowire through a hydrothermal synthesis method, then mixing the WO3 nanowire with graphite oxide dispersing solution, and then obtaining the graphene load WO3 nanowire composite material by means of photocatalytic reduction. The preparation process is simple, reagents are cheap, large-scale preparation is facilitated, and simultaneously an environment-friendly preparation method is provided for reduction of graphite oxide and formation of the nano composite material.

Description

technical field [0001] The invention belongs to the technical field of new materials and their preparation, and relates to a graphene-loaded WO 3 Nanowire composite materials and methods for their preparation. technical background [0002] Nanocomposites are widely used in the fields of chemistry, optics and electricity because of their excellent comprehensive properties, especially the designability of their properties. In recent years, nanocomposites have received more and more attention. [0003] As an n-type semiconductor, tungsten oxide is a typical transition metal oxide. In addition to being used as a catalyst, electrochromic, electrode material and solar absorbing material, tungsten oxide also has the properties of semiconductor materials such as gas sensitivity, heat sensitivity and pressure sensitivity. Tungsten oxide can be used in the fields of gas sensing, photocatalysis, photoconductivity and supercapacitors. Compared with traditional tungsten-based materia...

Claims

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Application Information

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IPC IPC(8): C01G41/02C01B31/04C01B32/184
Inventor 阎建辉周民杰张丽张娜
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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