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Preparation method of filament-like W18O49 material

A W18O49, filamentous technology, applied in the field of preparation of filamentous W18O49 materials, can solve the problems of complex methods, low chemical purity, and uneven morphology.

Active Publication Date: 2016-01-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing one-dimensional nanofilament structure W 18 o 49 The material method is complex, and the W 18 o 49 The chemical purity is low and the morphology is not uniform

Method used

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  • Preparation method of filament-like W18O49 material
  • Preparation method of filament-like W18O49 material
  • Preparation method of filament-like W18O49 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Add 0.7931gWCl 6 Add it to 40mL of absolute ethanol to prepare a 0.05mol / L solution A;

[0025] 2) Add 0.5390g analytically pure octadecylamine (CH 3 (CH 2 ) 16 CH 2 NH 2 ), to obtain solution B;

[0026] 3) Seal solution B with a plastic wrap to avoid contact with the air, first use magnetic stirring for 20 minutes, and then ultrasonic (60 Hz) treatment for 30 minutes to obtain solution C;

[0027] 4) Add solution C to a 100mL polytetrafluoroethylene-lined autoclave with a volume filling ratio of 40%, then seal the autoclave, and react in a homogeneous reactor at 160°C for 24h Cool to room temperature with the furnace, centrifuge with absolute ethanol, wash 3 times, and dry in a vacuum oven at 60°C for 3 hours to obtain filamentous W 18 o 49 Material.

[0028] Depend on figure 1 It can be seen that: the W of the pure phase of the product prepared by the present invention 18 o 49 Material. Depend on figure 2 It can be seen that the W obtained by the pr...

Embodiment 2

[0031] 1) Add 0.9914gWCl 6 Add it into 50mL of absolute ethanol to prepare 0.06mol / L solution A;

[0032] 2) Add 0.6468g analytically pure octadecylamine (CH 3 (CH 2 ) 16 CH 2 NH 2), to obtain solution B;

[0033] 3) Seal solution B with plastic wrap to avoid contact with air, first use magnetic stirring for 40 minutes, and then ultrasonic (60 Hz) treatment for 20 minutes to obtain solution C;

[0034] 4) Add solution C to a 100mL polytetrafluoroethylene-lined autoclave with a volume filling ratio of 40%, then seal the autoclave and react in a homogeneous reactor at 150°C for 18 hours Cool to room temperature with the furnace, centrifuge with absolute ethanol, wash 3 times, and dry in a vacuum oven at 60°C for 3 hours to obtain filamentous W 18 o 49 Material.

[0035] The filamentous W obtained in this example 18 o 49 A single length of about 1 ~ 1.5μm.

Embodiment 3

[0037] 1) 1.0259gWCl 6 Add it to 60mL of absolute ethanol to prepare a 0.08mol / L solution A;

[0038] 2) Add 2.5870g analytically pure octadecylamine (CH 3 (CH 2 ) 16 CH 2 NH 2 ), to obtain solution B;

[0039] 3) Seal solution B with a plastic wrap to avoid contact with the air, first use magnetic stirring for 20 minutes, and then ultrasonic (60 Hz) treatment for 30 minutes to obtain solution C;

[0040] 4) Add solution C to a 100mL polytetrafluoroethylene-lined autoclave with a volume filling ratio of 60%, then seal the autoclave, and react in a homogeneous reactor at 170°C for 18 hours Cool to room temperature with the furnace, centrifuge with absolute ethanol, wash 3 times, and dry in a vacuum oven at 60°C for 3 hours to obtain filamentous W 18 o 49 Material.

[0041] The filamentous W obtained in this example 18 o 49 A single length of about 1.3 ~ 1.8μm.

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Abstract

A preparation method of a filament-like W18O49 material includes the following steps: 1) adding WC16 into anhydrous ethanol to prepare a solution A being 0.03-0.08 mol / L in concentration; 2) adding octadecylamine to the solution A to obtain a solution B; 3) uniformly stirring the solution B under a sealed condition to obtain a solution C; and 4) adding the solution C into a high-pressure reaction kettle, performing a reaction in a homogeneous phase reactor at 140-180 DEG C and cooling a reaction product to obtain the filament-like W18O49 material. The preparation method is mild in reaction conditions and is low in required temperature and is simple in steps and high in repeatability. The filament-like W18O49 material has a strong adsorbility to methylene blue and an excellent photo-catalytic performance to methyl orange, and in particular, has certain adsorbility to the methyl orange in a dark reaction process. Before 40 min of a photo-reaction stage, the material reaches 80% in degradation of the methyl orange. It is predicted that the material has a high exploration value in performances.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a filamentous W 18 o 49 The method of preparation of the material. Background technique [0002] WO 3 Composed of perovskite-type structural units, its crystal structure is composed of regular octahedral units composed of 1 tungsten atom and 6 oxygen atoms, which share vertices. WO 3 Has a variety of crystal forms, such as monoclinic (m-WO 3 ), triclinic (tr-WO 3 ), Orthogonal (o-WO 3 ), Quartet (te-WO 3 ), Hexagon (h-WO 3 )Wait. Among them, monoclinic, triclinic, orthorhombic and hexagonal crystals can exist stably at room temperature. The crystal structure of WO 3 For example, the hexagonal tungsten oxide crystal structure has a larger pore structure, which can accommodate cations and transform into tungsten blue, and is considered to be a good electrochromic material. WO 3 Easy to form non-stoichiometric WO x . There is WO in the crystal structu...

Claims

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Application Information

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IPC IPC(8): C01G41/02
CPCC01G41/02C01P2002/72C01P2004/03C01P2004/61C01P2004/62
Inventor 黄剑锋海国娟介燕妮曹丽云李嘉胤吴建鹏孔新刚卢靖张博
Owner SHAANXI UNIV OF SCI & TECH
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