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Photocatalytic material photocatalytic activity characterization method and device

A photocatalytic material and photocatalytic activity technology, applied in the field of material performance characterization, can solve the problems of power consumption, complex equipment and high instrument price, and achieve the effects of low daily maintenance cost, simple reaction process and simple equipment.

Inactive Publication Date: 2008-03-26
NANJING UNIV
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AI Technical Summary

Problems solved by technology

[0007] 1. High instrument price: the main component of the system - the gas chromatograph is very expensive
[0008] 2. High maintenance cost: the use of gas chromatograph requires high-purity carrier gas, and the injection needles are all consumables, and the power of the instrument is large, which consumes electric energy
[0009] 3. Safety issues: Hydrogen gas is required to detect organic matter with a hydrogen flame detector, which poses serious safety hazards
[0010] 4. Low efficiency: the use of manual injection with four-way valve and injection needle at regular intervals will bring huge waste of labor costs and reduce the work efficiency of researchers
[0011] 5. Complex equipment: the equipment specifically includes gas chromatograph, four-way valve, high-purity carrier gas, high-pressure glass reactor, vacuum equipment and other equipment
Very complex structure

Method used

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  • Photocatalytic material photocatalytic activity characterization method and device

Examples

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Effect test

Embodiment example 1

[0035] Implementation case 1: Photocatalytic reaction of acetone and carbon dioxide from photodegradation of isopropanol.

[0036] First, the powder sample is spread in a circular glass tank with a diameter of 2 cm, and the circular glass tank containing the sample is placed in the reactor, and the film sample can be directly put into it. Cover the quartz plate and securely seal. Open the quick connector in the closed circuit system, connect the air filter to the air inlet valve, turn on the gas circulation pump, and use clean air to clean the reactor, pipeline, and the gas chamber in the infrared gas analyzer to remove adsorbed pollutants , This process can also choose to use carbon dioxide-free air distribution gas for purging. Connect the quick connector and inject 10ul isopropanol into the sample vaporization chamber with the injection needle. Start the circulation pump to circulate for 30 minutes to completely vaporize the injected isopropanol. Turn on the infrared gas analyz...

Embodiment example 2

[0037] Implementation case 2: The photocatalytic reaction of the photodegradation of acetaldehyde to carbon dioxide.

[0038]First, spread the powder sample in a pre-made circular glass tank with a diameter of 2 cm, and place the circular glass tank containing the sample in the reactor, and the film sample can be directly put in. Cover the quartz plate and securely seal. Open the quick connector in the closed circuit system, connect the air filter to the air inlet valve, turn on the gas circulation pump, and use clean air to clean the reactor, pipeline, and the gas chamber in the infrared gas analyzer to remove adsorbed pollutants , This process can also choose to use carbon dioxide-free air distribution gas for purging. Connect the quick connector and inject 10ul of 40% acetaldehyde solution into the sample vaporization chamber with a sample needle. Start the circulating pump to circulate for 60 minutes to completely vaporize the injected acetaldehyde. Turn on the infrared gas an...

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Abstract

Photochemical catalysis activity attributes method of the photochemical catalysis material, as the following steps: puts the photochemical catalysis material in the glass gas reactor and make it tight, using the clean air to wash the reactor system; sets the light source, makes its light go through the light-directing window and shine in the photochemical catalysis material; injects the organic liquid or liquor in the reactor system, uses isopropyl alcohol photochemical catalysis firstly to produce acetone and carbon dioxide attributes system; uses new photochemical catalysis activity test instrumentation to test the content of the isopropyl alcohol, acetone and carbon dioxide in the mixture gas; the photochemical catalysis activity of the material is character by the quantity of the acetone and carbon dioxide, it is the reaction speed; the photochemical catalysis reactor produce is test in real time by the test instrumentation.

Description

Technical field [0001] The invention relates to a method and device for characterizing material properties, in particular to a method and device for testing the activity of photocatalytic materials for gas phase degradation of organic matter. Background technique [0002] With the development of human society, people are facing more and more serious indoor and outdoor environmental pollution problems. It is a very economical, convenient and feasible method to rely on photocatalytic materials to use sunlight to degrade various gas-phase pollutants that harm the environment, and then to mineralize them into harmless water and carbon dioxide. At present, the scientific community has paid very high attention to the research of photocatalysis, and a large number of scientific researchers are engaged in research on the application of photocatalysis in environmental purification. However, the current price of scientific instruments used to characterize photocatalytic materials is relati...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCY02A50/20
Inventor 邹志刚范晓星刘礼飞陈新益
Owner NANJING UNIV
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