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Thermally driven catalyst and applications thereof

A catalyst, heat-driven technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of solar energy loss, low photocatalyst degradation efficiency, etc. Achieve the effect of wide application, repeated use of catalytic performance and high catalytic efficiency

Active Publication Date: 2018-01-26
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in terms of spectral response range, photocatalytic materials have been able to absorb and respond to the full solar spectrum, most of the solar energy absorbed by photocatalytic materials will be turned into heat and lost, and only a very small part of the energy is used for photocatalysis. reaction, so the degradation efficiency of the current photocatalyst is still low

Method used

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  • Thermally driven catalyst and applications thereof
  • Thermally driven catalyst and applications thereof
  • Thermally driven catalyst and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: W@W 18 o 49 Preparation of Thermally Driven Catalysts

[0038] In this embodiment, W@W 18 o 49 Taking thermally driven catalyst as an example to describe in detail, the W@W 18 o 49 The preparation method of thermally driven catalyst comprises the following steps:

[0039] (1) Connect the tungsten boat to the evaporation electrode of the vacuum thermal evaporation coating machine, and add 0.5g of tungsten powder (purity 99.95%) into the tungsten boat, and then place the carbon fiber cloth on the top of the tungsten boat to make the carbon fiber cloth and tungsten The distance between the boats is 2-100 mm.

[0040] (2) Turn on the mechanical pump to vacuumize the vacuum coating chamber for 20 minutes.

[0041] (3) Feed oxygen (purity 99.95%) and inert gas (purity 99.95%) into the vacuum coating cavity with a flow ratio of 1:100, and keep for 20 minutes.

[0042] (4) Continuously feed oxygen and inert gas into the vacuum coating chamber, turn on the ...

Embodiment 2

[0051] Example 2: Using infrared radiation heat to drive catalytic degradation of dye molecules and its repeated cycle under infrared irradiation test

[0052] Get the coated W@W prepared in Example 1 18 o 49 Carbon fiber cloth for thermally driven catalyst (area 1.0cm 2 ) as a catalyst sample, join in the methyl orange solution (concentration 0.12mmol / L) of 10ml, then place the methyl orange solution in the infrared oven that a 250W infrared light bulb is housed and irradiate for 1.5 hours, test formazan every 0.5 hours The ultraviolet-visible absorption spectrum of the base orange solution, and the measured data were used as the characteristic curve of the concentration of methyl orange over time. Under the irradiation of infrared light, the temperature of the methyl orange solution rose from room temperature 30°C to 70°C and then stabilized.

[0053] see image 3 , which is a characteristic curve diagram of the concentration of methyl orange solution changing with t...

Embodiment 3

[0057] Example 3: Experiments on catalytic degradation of dye molecules driven by ambient heat and their repeated cycles in a dark environment

[0058] Get 4 pieces of W@W plated that embodiment 1 makes 18 o 49 Carbon fiber cloth for thermally driven catalyst (area 1.0cm 2 ) as catalyst samples were added to 4 bottles of 10ml methyl orange solution (concentration 0.12mmol / L), and then the 4 bottles of methyl orange solution were placed in 5°C, 25°C, 50°C, 75°C matte After 20 hours in the environment, the ultraviolet-visible absorption spectra of 4 bottles of methyl orange solutions were tested respectively, and the measured data were used as the characteristic curve of the concentration of methyl orange with temperature.

[0059] see Figure 5 , which is a comparison chart of catalytic performance at different temperatures in the repeated cycle test of catalytic degradation of dye molecules in a light-free environment in this embodiment. It can be seen from the figure th...

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Abstract

The invention relates to a thermally driven catalyst. The thermally driven catalyst is formed by a metal oxide nanostructure and a compound structure adhered on the surface of the metal oxide nanostructure and comprising identical metal quantum dot. The metal oxide nanostructure can be a tungsten oxide nanowire with the size of 8*5000nm, the chemical formula of the tungsten oxide nanowire is W18O49, and the metal quantum dot can be tungsten quantum dot with the size of 1*10nm. The thermally driven catalyst can absorb infrared irradiation or absorb outside heat in a manner of heat transfer, andthe absorbed heat is used for driving to catalyze the degradation reaction of organic matters in an aqueous solution, and the thermally driven catalyst has the advantages of being mild in usage conditions, capable of continuously driving the degradation reaction without the need of achieving specific temperature, high in catalysis efficiency, capable of keeping stability of catalytic performanceafter being repeatedly used, and the like, and can be applied in the fields of sewage treatment, harmless treatment of various flammable and combustible harmful substances, and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst materials and sewage treatment, in particular to a heat-driven catalyst and its application. Background technique [0002] With the rapid development of modern industrial production technology, the problem of human damage and pollution to the environment is becoming more and more obvious, especially the pollution of all kinds of sewage, organic and highly toxic by-products produced in the process of producing various materials and commodities. How to carry out follow-up harmless treatment of such by-products has become a major problem in environmental protection. [0003] Based on the concept of green environmental protection, the scientific community has proposed various means and methods to deal with chemical by-products, which can be mainly divided into physical methods, chemical methods, microbial methods and photocatalytic methods. Among them, the photocatalytic method is recognized as one ...

Claims

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Application Information

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IPC IPC(8): B01J23/30C02F1/30C02F1/00C02F101/38C02F101/30
CPCB01J23/30C02F1/00C02F1/30
Inventor 罗坚义黄景诚梁宝文莫希伟廖慧珍唐秀凤曾庆光
Owner WUYI UNIV
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