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Preparation method and photocatalytic application of monoclinic WO3 nanometer cuboid

A cuboid, monoclinic phase technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of environmental friendliness, stable photocatalytic degradation, and high process efficiency

Active Publication Date: 2018-12-18
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, as transition metal oxides, monoclinic WO 3 The traditional synthesis method of the material is hydrothermal decomposition of acidified tungstate and synthesis of organic system to commercialize monoclinic phase WO 3 Hydrothermal Synthesis of Monoclinic WO as Precursor 3 Nanomaterials have not been reported

Method used

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  • Preparation method and photocatalytic application of monoclinic WO3 nanometer cuboid
  • Preparation method and photocatalytic application of monoclinic WO3 nanometer cuboid

Examples

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Embodiment 1

[0017] Monoclinic WO 3 The specific preparation process of the nanocuboid is as follows: add 0.3g of commercial WO in a 50mL beaker 3 Particles and 11 mL (30%) H 2 o 2 , after stirring evenly, transfer the obtained liquid into a 50ml stainless steel reaction kettle lined with polytetrafluoroethylene, hydrothermally treat at 240°C for 12h, then cool naturally to room temperature, the product is washed by centrifugation, and vacuum-dried at 50°C to obtain a monoclinic phase WO 3 Nano cuboid, width is 74-490nm, length is 76-770nm, thickness is 24-58nm (such as figure 1 shown).

Embodiment 2-11

[0019] The material prepared in Example 1 was used for photocatalytic degradation of methylene blue wastewater solution.

[0020] Add 50 mg of the material in Example 1 into a 250 mL Erlenmeyer flask containing 100 mL of a methylene blue solution with a concentration of 1-10 mg / L, and treat in the dark for 30 min to achieve adsorption / desorption equilibrium. The reaction system was irradiated with a 300WXe lamp at room temperature for a certain period of time (30-240min) under stirring conditions. After the reaction product was centrifuged, the upper layer was taken as a clear night, and its composition was analyzed at the maximum absorption wavelength of 664nm by a spectrophotometer PerkinElmer Lambda 750. The reaction results are as follows.

[0021] Table 1 Monoclinic WO 3 Reaction results of photodegradation of methylene blue wastewater solution by nanocuboids

[0022]

[0023] It can be seen from Table 1 that the monoclinic phase WO 3 Nano cuboid photocatalytically ...

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Abstract

The invention relates to a preparation method and photocatalytic application of monoclinic WO3 nanometer cuboid. Specifically, the monoclinic WO3 nanometer cuboid is hydrothermally synthesized by using WO3 particles as a precursor. The monoclinic WO3 nanometer cuboid can realize efficient photocatalytic degradation of a methylene blue solution havingwith a concentration of 1 to 10mg / L at room temperature with a removal rate of 100 percent and no production of by-products.

Description

technical field [0001] The present invention relates to monoclinic WO 3 The preparation method of nano cuboid and its photocatalytic application belong to the field of preparation and application of photocatalyst. Background technique [0002] Monoclinic WO 3 is a stable and common WO 3 Phase, to [WO 6 ] is the basic structural unit, composed of shared angles, and its crystal structure is rhenium trioxide (ReO 3 )type. Monoclinic WO 3 The unique crystal structure makes it have optical, electrical and catalytic properties, and has important application prospects in the fields of photo / electrochromic devices, lithium-ion batteries, gas sensors, and photocatalysts. Recent studies have shown that WO 3 The chemical properties of materials are closely related to their morphology, so the morphology can be controlled to synthesize WO 3 Materials have become a hotspot of research. [0003] Liquid phase synthesis method, especially hydrothermal method or solvothermal method, ...

Claims

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Application Information

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IPC IPC(8): C01G41/02B82Y30/00B82Y40/00B01J23/30
CPCB82Y30/00B82Y40/00C01G41/02B01J23/30C01P2004/01C01P2002/72B01J35/39
Inventor 王文嫔李忠成
Owner QINGDAO UNIV OF SCI & TECH
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