The visible light of argon plasma produced by the electron cyclone resonance ion source (ECRIS) with wavelength from 300 to 900 nm has been detected by Spec-pro 500i, a grating spectrometer. A great amount of the char...The visible light of argon plasma produced by the electron cyclone resonance ion source (ECRIS) with wavelength from 300 to 900 nm has been detected by Spec-pro 500i, a grating spectrometer. A great amount of the character lines were emitted when the arc starting. Most of these lines can be identified and were from argon atom and ions with lower charge states such as 1+, 2+ or 3+. A small fraction of unknown lines was possibly from argon ions with higher charge states which needs to be investigated later. Fig.1 shows part of the results, and the referring lines are compared with the up-to-date data from NIST (the National Institute of Standards and Technology) in Table 1.展开更多
The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a sili...The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a silicon cladding, which can emit light through side surface more uniformly and transmit light for longer distance to avoid attenuation of light by liquid medium. The filament lamp was chosen as visible light source. Different reaction conditions, such as the presence of optical fiber or not, the quantity of SOF, light irradiation intensity were tested by measuring the methylene blue degradation of methylene blue. The results show that suitable reaction conditions were 1.167 g·L-1 Ag + /TiO 2 with 7% (by mass) of Ag + doped in TiO 2 , and 500 roots of SOF (30 cm length in solution). The photocatalytic degradation efficiency under 300W lamp irradiation for 8h was about 97%. And the photocatalytic degradation efficiency of methylene blue degradation was proportional to SOF quantity, light irradiation intensity and catalytic dosage within a certain range. Compared with general UV and visible light SOFs could save a huge amount of energy and cost, in the potential applications in dealing with organic pollutants on a large scale.展开更多
文摘The visible light of argon plasma produced by the electron cyclone resonance ion source (ECRIS) with wavelength from 300 to 900 nm has been detected by Spec-pro 500i, a grating spectrometer. A great amount of the character lines were emitted when the arc starting. Most of these lines can be identified and were from argon atom and ions with lower charge states such as 1+, 2+ or 3+. A small fraction of unknown lines was possibly from argon ions with higher charge states which needs to be investigated later. Fig.1 shows part of the results, and the referring lines are compared with the up-to-date data from NIST (the National Institute of Standards and Technology) in Table 1.
文摘The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a silicon cladding, which can emit light through side surface more uniformly and transmit light for longer distance to avoid attenuation of light by liquid medium. The filament lamp was chosen as visible light source. Different reaction conditions, such as the presence of optical fiber or not, the quantity of SOF, light irradiation intensity were tested by measuring the methylene blue degradation of methylene blue. The results show that suitable reaction conditions were 1.167 g·L-1 Ag + /TiO 2 with 7% (by mass) of Ag + doped in TiO 2 , and 500 roots of SOF (30 cm length in solution). The photocatalytic degradation efficiency under 300W lamp irradiation for 8h was about 97%. And the photocatalytic degradation efficiency of methylene blue degradation was proportional to SOF quantity, light irradiation intensity and catalytic dosage within a certain range. Compared with general UV and visible light SOFs could save a huge amount of energy and cost, in the potential applications in dealing with organic pollutants on a large scale.
