Electrodes microwave discharging light with 190nm and 207nm quasi-molecule and use thereof

Abstract

The invention consists of microwave generating source, cable, resonant cavity and electrodeless quartz lamp tube. Kr-I2 or Kr-Br2 mixed gases are separately filled into quartz tube. By using microwave electrode discharge method, the mixed gases are activated to generate excited state KrI or KrBr quasi molecule. Through spontaneous radiative transition to ground state, it generates 190nm or 270 nm extreme ultraviolet.

Description

technical field [0001] The invention belongs to the technical field of photochemistry, and in particular relates to a high-power novel microwave excimer light source generating system. Background technique [0002] The use of ultraviolet light to degrade harmful pollutants has long been applied to the field of environmental protection, and it is also a research hotspot in recent years. Common technologies such as: 185nm ultraviolet light directly degrades odorous gases [1], 253.7nm ultraviolet light sterilization, O 3 / UV and H 2 o 2 / UV combined water purification, TiO 2 / UV photocatalytic degradation of organic pollutants, etc. [0003] Compared with traditional chemical, physical and biological methods, UV photodegradation of pollutants has the following outstanding advantages: ① high removal efficiency; ② small size; ③ low operating costs; ④ simple operation, easy installation and maintenance; ⑤ low manufacturing cost, However, existing UV light applications have the...

AI Technical Summary

Problems solved by technology

Both the microwave electrodeless discharge and the excimer light source have been proposed and implemented in different fields. The former is mainly to solve the problems of short life and single spectral line of the existing electrode discharge ultraviolet lamp [2], while the latter is based on its infinite The advantage of self-absorption of radiation and was first used in the laser generation system

In recent years, there have also been some attempts to directly or photocatalytically degrade dye wastewater by using microwave electrodeless discharge to excite mercury atoms to generate ultraviolet light with a wavelength of 185nm or longer (such as 253.7nm and 365nm) [3, 4, 5], but they have not fundamentally Above all, it solves the limitations of the wavelength of ultraviolet light existing in the above-mentioned mercury lamp light source, and at the same time, the defect of low energy utilization rate is unavoidable.

We organically combined microwave electrodeless discharge and excimer light source to develop a new type of microwave excimer ultraviolet light source, and applied it to the direct photodegradation of pollutants, which has not been reported at home and abroad

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