Ultraviolet rays yog ib qho tseem ceeb ntawm lub hnub ci, thiab lawv cov wavelengths tuaj yeem muab faib ua peb pawg. Ntawm lawv, UVC yog nthwv dej luv luv, uas yog absorbed thiab thaiv los ntawm ozone txheej, tsis tuaj yeem ncav cuag hauv av, thiab tsis muaj kev phom sij rau tib neeg lub cev. Yog li ntawd, UVA thiab UVB nyob rau hauv ultraviolet rays yog lub ntsiab wavelength bands uas ua rau kev puas tsuaj rau tib neeg daim tawv nqaij.

 

Hongwu Nano Covtitanium dioxide (TiO2) nanopowdermuaj me me particle loj, siab ua haujlwm, siab refractive zog thiab siab photoactivity. Nws tuaj yeem tsis tsuas yog cuam tshuam thiab tawg cov kab hluav taws xob ultraviolet, tab sis kuj nqus tau lawv, yog li muaj peev xwm thaiv kev tiv thaiv UV rays. Nws yog ib qho kev cog lus ntawm lub cev UV-shielding tiv thaiv nrog kev ua tau zoo dua.

 

Lub peev xwm tiv thaiv UV ntawm nano TiO2 muaj feem xyuam rau nws qhov loj me. Thaum cov particle loj ntawm titanium dioxide nanoparticle yog ≤300nm, lub ultraviolet rays nrog wavelengths ntawm 190 thiab 400nm yog feem ntau yog reflected thiab tawg; Thaum cov particle loj ntawm titania nanopowder yog <200nm, UV tsis kam yog feem ntau cuam tshuam thiab tawg. Lub hnub tiv thaiv mechanism ntawm ultraviolet rays nyob rau hauv nruab nrab-yoj cheeb tsam thiab ntev-yoj cheeb tsam yog yooj yim npog, thiab lub hnub tiv thaiv muaj peev xwm tsis muaj zog; Thaum cov particle loj ntawm TiO2 nano hmoov yog nyob nruab nrab ntawm 30 thiab 100nm, nqus ntawm ultraviolet rays nyob rau hauv nruab nrab-yoj cheeb tsam yog ho txhim khu kev qha, thiab shielding nyhuv ntawm ultraviolet rays yog qhov zoo tshaj plaws. Zoo, nws lub hnub tiv thaiv mechanism yog nqus ultraviolet rays.

 

Los xaus,titanium dioxide nano particlemuaj ntau lub hnub tiv thaiv mechanisms rau txawv wavelengths ntawm ultraviolet rays. Thaum lub wavelength ntawm ultraviolet rays yog ntev, lub shielding kev ua tau zoo ntawm nano titanium dioxide TiO2 nyob ntawm nws muaj peev xwm tawg; Thaum lub wavelength ntawm ultraviolet rays luv luv, nws cov shielding kev ua tau zoo nyob ntawm nws lub peev xwm nqus. Qhov ntawd yog hais tias, nano titanium oxide lub peev xwm los tiv thaiv ultraviolet rays yog txiav txim siab los ntawm ob qho tib si nws lub peev xwm nqus thiab tawg muaj peev xwm. Qhov me me ntawm qhov loj me me, qhov muaj zog ntawm UV nqus tau ntawm nano titanium dioxide hmoov.

 

Kev sim qhia tias Hongwu Nano lub nano rutile titanium dioxide TiO2 muaj UV tiv thaiv zoo dua li nano anatase TiO2. Nano TiO2 muaj daim ntawv thov kev cia siab zoo hauv kev tiv thaiv UV tiav ntawm paj rwb ntaub thiab hauv cov txheej txheem tiv thaiv ultraviolet ntawm cov iav insulating.

 

 


Post lub sij hawm: Jan-10-2024

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