The welding fume has significant effects on the weld workers＇ health. In order to overwhelm the shortcomings of the control measures of the welding fume, the research of the purifying of welding fume on the spot was ...The welding fume has significant effects on the weld workers＇ health. In order to overwhelm the shortcomings of the control measures of the welding fume, the research of the purifying of welding fume on the spot was carried out. The purifying device was designed. The relationship between the corona discharge voltage and the purifying efficiency was investigated through experiments with different needle electrode numbers, different ring electrode numbers and different needle-plate distances. The results show that 5-needle double-ring electrode has the best efficiency; the purifying efficiency is increase with the lessening of the needle-plate distance and the increase of the discharge voltage. Using 5-needle double-ring electrode, the purifying efficiency reaches its maximum value 97.9% while the needle-plate distance is 6 cm, the discharge voltage is -35 kV. The purifying device has an excellent purifying effect on the welding fume.展开更多
The noble metal nanoparticles, such as gold, silver and copper, has been widely incorporated into the photoelectronic devices acting as a light-harvesting an- tenna and enhancing photocurrents through their light scat...The noble metal nanoparticles, such as gold, silver and copper, has been widely incorporated into the photoelectronic devices acting as a light-harvesting an- tenna and enhancing photocurrents through their light scattering or localized surface plasmon resonance effects. Here, this article presented the investigations into the use of gold nanocrystals to realize the plasmon-enhanced photocurrent generation in TiO2 nanorod-based quantum dots-sensitized solar cells （QDSSCs）. By introducing the gold nanocrystals, the short-circuit current density （Jsc） of QDSSCs was enhanced more than 10 % from 7.788 to 8.574 mA/cm^2 due to the direct injection of hot electrons from the gold nanocrystals to the photoanode. In order to confirm such conclusion, composite Au/TiO2 nanostructure was also fabricated. Indeed, the hot electrons injection resulted photocurrent density of ～5 mA/cm^2 was clearly observed under the visible light irradiation.展开更多
文摘The welding fume has significant effects on the weld workers＇ health. In order to overwhelm the shortcomings of the control measures of the welding fume, the research of the purifying of welding fume on the spot was carried out. The purifying device was designed. The relationship between the corona discharge voltage and the purifying efficiency was investigated through experiments with different needle electrode numbers, different ring electrode numbers and different needle-plate distances. The results show that 5-needle double-ring electrode has the best efficiency; the purifying efficiency is increase with the lessening of the needle-plate distance and the increase of the discharge voltage. Using 5-needle double-ring electrode, the purifying efficiency reaches its maximum value 97.9% while the needle-plate distance is 6 cm, the discharge voltage is -35 kV. The purifying device has an excellent purifying effect on the welding fume.
基金supported by the Program for Changjiang Scholars and Innovative Research Team in University(PCS IRT1126)the National Natural Science Foundation of China(11274093,61376061 and 61240053)
文摘The noble metal nanoparticles, such as gold, silver and copper, has been widely incorporated into the photoelectronic devices acting as a light-harvesting an- tenna and enhancing photocurrents through their light scattering or localized surface plasmon resonance effects. Here, this article presented the investigations into the use of gold nanocrystals to realize the plasmon-enhanced photocurrent generation in TiO2 nanorod-based quantum dots-sensitized solar cells （QDSSCs）. By introducing the gold nanocrystals, the short-circuit current density （Jsc） of QDSSCs was enhanced more than 10 % from 7.788 to 8.574 mA/cm^2 due to the direct injection of hot electrons from the gold nanocrystals to the photoanode. In order to confirm such conclusion, composite Au/TiO2 nanostructure was also fabricated. Indeed, the hot electrons injection resulted photocurrent density of ～5 mA/cm^2 was clearly observed under the visible light irradiation.
