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(1)汞共振辐射的2537.5线,能经激发汞原子而发生光敏作用,间接形成臭氧。至于1849.6线,则可同时发生光化和光敏作用产生臭氧。(2)2537.5线汞光敏作用形成臭氧的反应机构可能为:Hg(~1S_0)+2537.5→Hg(~3P_1~0)Hg(~3P_1~0)+O_2(~3Σ_g~-)→HgO_2HgO_2+O_2(~3Σ_g~-)→HgO+O_3量子总产率应近于1,实测的最大值为0.51。1849.6线汞光敏作用形成臭氧的反应机构可能为:Hg(~1S_0)+1849.6→Hg(~1P_1~0)Hg(~1P_1~0)+O_2(~3Σ_g~-)→Hg(~1S_0)+2O(~3P)O_2(~3Σ_g~-)+O(~3P)+M→O_3+M量子总产率应小于2,实测的最大值为1.15。(3)量子总产率随气体流速的增加而增加,每一汞原子所生臭氧的分子数随气体流速的增加而减少。(4)量子总产率和每一汞原子形成臭氧的分子数均随汞的蒸气压的减低而增加。每一汞原子在经过反应管吸收辐射形成臭氧的过程中,能发生极大次数的循环。
(1) 2537.5 line of mercury resonance radiation, which can generate photosensitization by exciting mercury atoms and indirectly form ozone. As for the 1849.6 line, you can produce photochemical and photochemical effects of ozone. (2) The reaction mechanism of 2537.5 line mercury photosensitivity to form ozone is that Hg (~ 1S_0) + 2537.5 → Hg (~ 3P_1 ~ 0) Hg (~ 3P_1 ~ 0) + O_2 (~ 3Σ_g ~ -) → HgO_2HgO_2 + The total quantum yield of O_2 (~ 3Σ_g ~ -) → HgO + O_3 should be close to 1, and the maximum value of the measurement is 0.51.1849.6 . The reaction mechanism may be: Hg (~ 1S_0) + 1849.6 → Hg (~ 1P_1 ~ 0) Hg (~ 1P_1 ~ 0) + O_2 ~ 3Σ_g ~ - → Hg ~ 1S_0 + 2O ~ 3P O_2 ~ 3Σ_g ~ - + O ~ 3P + M → O_3 + M Quantum total yield should be less than 2, the maximum measured value of 1.15. (3) The total quantum yield increases with gas flow rate, and the number of ozone-generating molecules per mercury atom decreases with increasing gas flow rate. (4) The total quantum yield and the number of molecules forming ozone per mercury atom increase with decreasing vapor pressure of mercury. Each mercury atom undergoes an extremely large number of cycles in the process of absorbing ozone to form ozone through the reaction tube.