Nanotechnology: Pom tau -Lub teeb-Triven Purification
Cov ntaub pua plag lub hauv paus purification zog yog nyob rau hauv nws txoj kev ua tiav daim ntawv thov ntawm "pom- teeb- teb TiO₂ txheej." Siv cov txheej txheem sol-gel, pawg kws tshaj lij tsim 50nm-thick anatase titanium dioxide (TiO₂) txheej ntawm pebble nto, doped nrog nitrogen (N-TiO₂) kom ntev nws lub teeb teb rau qhov pom spectrum (400-}760nm). Qhov no txhais tau tias tsis muaj UV teeb yuav tsum tau - ib qho teeb pom kev zoo sab hauv tsev lossis lub teeb ntuj tuaj yeem qhib nws txoj haujlwm catalytic.
Thaum huab cua muaj kuab paug (formaldehyde, TVOC, kab mob, thiab lwm yam) hu rau pebble nto, daim duab-tsim hluav taws xob thiab qhov ua rau cov dej thiab cov pa oxygen hauv huab cua los tsim hydroxyl radicals (·OH) uas muaj zog oxidizing zog, decomposing cov pa phem rau CO₂ thiab dej. Cov ntaub ntawv kuaj pom: hauv 30㎡ qhov chaw kaw nrog 10㎡ ntawm cov ntaub pua plag no, formaldehyde degradation nce mus txog 92% hauv 6 teev (los ntawm 0.3mg / m³ txog 0.024mg / m³, zoo hauv qab lub teb chaws tus qauv ntawm 0.08mg / m³); Cov kab mob tua kab mob tiv thaiv E. coli thiab Staphylococcus aureus ntaus 99.9% tsis muaj kuab paug thib ob.
Qhov tseem ceeb, nws qhov kev ua kom huv si ruaj khov: cov txheej txheej quantum efficiency nce mus txog 4.2%, nrog tsuas yog 3% kev ua haujlwm lwj tom qab 1000 teev ntawm lub teeb pom kev zoo -zoo dua li cov tshuaj photocatalysts (15% lwj hauv 100 teev)-ua kom "ib qho kev teeb tsa, xyoo ua haujlwm."
Kev Tshawb Fawb Txog Kev Tshawb Fawb: Purification los ntawm Lab mus rau qhov tseeb Scenes
Lub photocatalyticpebble ntaub pua plagtau dhau qhov kev sim tag nrho raws li GB / T 18801-2022Cua Purifiers, ua tau zoo hauv cov ntsiab lus tseem ceeb xws li "cov huab cua huv huv (CADR)" thiab "cov khoom huv huv (CCM)": nws cov formaldehyde CADR yog 86m³ / h, sib npaug rau qhov nruab nrab -qhov loj ntawm huab cua purifier, tab sis nrog xoom lub zog noj (tag nrho cia siab rau lub teeb ntuj).
Daim ntawv thov kev tsav tsheb hauv Shanghai kindergarten lees paub nws qhov txiaj ntsig. Tom qab txhim kho cov ntaub pua plag hauv chav ua haujlwm 200㎡, 3- lub hlis saib xyuas qhia tau hais tias sab hauv tsev formaldehyde stabilized ntawm 0.03-0.05mg/m³-tshaj 70% qis dua qhov chaw tsis muaj ntaub pua plag (0.12-0.15mg/m³); Kev tsis tuaj kawm ntawv vim kev ua pa tsis xis nyob poob los ntawm 8% mus rau 2% txhua hli. Tus thawj coj tau sau tseg tias cov menyuam yaus nyiam lub pob zeb zoo nkauj thiab feem ntau ua si taw ntawm nws, tsis muaj kev pheej hmoo ntawm cov tshuaj lom neeg-cov txheej txheem dhau los ntawm kev kuaj tawv nqaij khaus (OECD 404) tsis muaj kev nkag siab, ua tau raws li cov qauv kev nyab xeeb rau menyuam yaus.
Tus kheej-Kev Ua Haujlwm Huv: Kev Ua Haujlwm Rov Ua Haujlwm los ntawm nag
Tsoos photocatalysts poob kev ua haujlwm thaum muaj cov pa phem, tab sis cov ntaub pua plag no ua tiav tus kheej- ntxuav los ntawm "cov qauv tsim + txheej txheej." Lub ntuj nkhaus ntawm pebbles txo cov plua plav tsub zuj zuj, thiab TiO₂ txheej yog superhydrophilic (dej sib cuag lub kaum ntse ntse<5°)-when rinsed by rain or water, a water film forms on the surface, washing away reaction residues and attached dust without manual wiping.
Kev ntsuam xyuas kev laus nrawm qhia tau tias: tom qab 50 simulated hnyav nag ntxhua (10L dej ib square meter), qhov kev ua haujlwm photocatalytic rov qab mus txog 100%; Tom qab 30 hnub ntawm kev siv tas li nyob rau hauv ib puag ncig muaj kuab paug nrog PM2.5 ntawm 150ug / m³, ib qho dej yaug tag nrho rov ua kom huv huv. Qhov no ua rau nws tsim nyog tsis yog rau sab hauv tsev nkaus xwb tab sis kuj tseem balconies thiab patios, tswj kev ua haujlwm ntev - lub sijhawm ua haujlwm los ntawm ntuj nag- tiag tiag "kev tu- dawb huv."