Kev tsis txaus dej tshiab yog ib qho teeb meem loj zuj zus rau kev txhim kho zej zog. Muaj kev tshaj tawm tias 29% ntawm cov pej xeem thoob ntiaj teb tsis muaj dej haus huv, thiab qhov kev thov dej huv tseem nce ntxiv vim yog kev loj hlob ntawm cov pej xeem thiab cov teeb meem ib puag ncig. Dej huv uas cuam tshuam nrog kev tu cev yog qhov tseem ceeb tshwj xeeb hauv qhov xwm txheej tam sim no ntawm tus kab mob coronavirus (Neocoronavirus pneumonia). Kev ua kom dej noo los ntawm lub hnub ci yog suav tias yog ib qho ntawm cov thev naus laus zis zoo tshaj plaws rau kev tsim dej huv los ntawm dej hiav txwv thiab cov dej khib nyiab siv lub hnub ci ua lub zog tsuas yog. Cov thev naus laus zis no vam khom rau cov khoom nqus dej hnub ci, uas ua haujlwm ua cov evaporators los hloov lub zog hnub ci mus rau hauv cua sov los tsim cov pa dej. Txhawm rau kom ua tiav cov dej noo siab thiab kev hloov pauv cua sov hnub ci zoo, cov khoom siv zoo tagnrho yuav tsum muaj ntau yam kev nqus dej kom siv tau zoo ntawm lub hnub ci spectrum, kev ua kom sov qis los tiv thaiv kev poob cua sov, thiab cov kav dej peb-seem (3D) porous rau kev thauj dej zoo. Txog tam sim no, cov kws tshawb fawb tau tsim ntau yam khoom siv photothermal raws li carbon (piv txwv li, graphene lossis carbon nanotubes), polymers, hlau thiab hlau oxides thiab lawv cov hybrids, thiab lwm yam.
Cov kws tshawb fawb tau ua haujlwm hnyav los tshawb nrhiav thiab ua ntau yam kev tshawb pom tshiab hauv xyoo tas los no, yog li cia peb kawm los ntawm ntau cov ntawv tshaj tawm txog kev nce qib ntawm kev tshawb fawb hauv kev tsim dej huv photothermal hauv xyoo tas los no.
- Kev Sib Txuas Lus Ntawm Xwm: Cov nplooj ntawm cov nroj tsuag txhawb nqa lub tshuab lim dej siv lub hnub ci thiab ua haujlwm tau zoo
Cov nplooj ntawm cov nroj tsuag uas muaj cov hlab ntsha ntuj tsim tau vam khom qhov sib txawv ntawm qhov siab osmotic, transpiration thiab excretion los tsim ntau tons dej huv, uas siv lub hnub ci. Tau txais kev tshoov siab los ntawm qhov no, cov kws tshawb fawb hauv Chun Li pawg ntawm Qinghua University tau tshaj tawm txog lub tshuab lim dej uas siv lub hnub ci rau kev lim dej thiab tsim dej kom zoo. Lub tshuab lim dej uas siv lub hnub ci no muaj lub poly(N-isopropylacrylamide) hydrogel (PN) uas tsis kub thiab ruaj khov uas tau teeb tsa rau ntawm lub pob txha superhydrophilic melamine ua npuas ncauj thiab coated nrog PNIPAm-modified graphene (PG) lim membrane sab nraud. Kev sim ua qauv molecular dynamics thiab cov txiaj ntsig ntawm kev sim tau qhia tias qhov xwm txheej superhydrophilic ntawm lub pob txha melamine uas tawv heev ua rau lub tshuab lim dej PNPG-F sai dua. Nyob rau hauv tib lub hnub ci irradiation, lub qauv tsim no tau muab 4.2 kg/m2/h sau thiab > 99% ion tshem tawm rau ib qho PNPG-F los ntawm cov dej ntsev pub los ntawm cov teebmeem synergistic ntawm evaporation thiab drip ntxiv. Tus sau xav txog cov ntawv thov zoo rau lub tshuab ua haujlwm zoo no hauv ntau yam kev kho dej. Txoj kev tshawb fawb no tau luam tawm ua ib daim ntawv hu ua "Cov nroj tsuag nplooj inspired sunlight-driven purifier for high-efficiency clean water production" hauv Nature subjournal Nature communications.
- Kev Txhim Kho ntawm Kev Tshawb Fawb: Cov tes hauj lwm polymer uas muaj zog heev ntawm cov hydrogels uas nqus tau lub teeb rau kev ntxuav dej los ntawm lub hnub
Kev siv dej hnub ci los ua kom dej huv yog ib txoj kev siv tshuab zoo rau kev tsim dej tshiab. Txawm li cas los xij, kev tsim cov pa dej hnub ci siv zog ntau, ua rau muaj dej tsawg hauv qab lub hnub ci ntuj. Yog li ntawd, muaj qhov xav tau ntau los tsim cov khoom siv tshiab uas tuaj yeem txo qhov kev xav tau hluav taws xob rau kev ua kom dej huv thiab ua kom dej hnub ci huv sai dua. Pawg neeg ntawm Xibfwb Guihua Yu hauv Austin, Texas, Tebchaws Meskas, tau tshaj tawm txog cov hydrogel uas nqus tau lub teeb (h-LAH) uas muaj polyvinyl cawv thiab chitosan ua lub hauv paus rau kev nqus dej thiab polypyrrole ua lub zog nqus lub teeb, uas tuaj yeem siv zog tsawg dua (< 50% ntawm qhov ntim dej) los ua kom dej huv. Nws tau pom tias kev ua kom lub peev xwm ua kom dej huv ntawm h-LAH tuaj yeem hloov pauv qhov xwm txheej ntawm dej thiab ua kom dej ua haujlwm ib nrab, yog li ua rau dej huv. h-LAH ua rau cov pa dej hnub ci tsim tau ntau dua ~ 3.6 kg / m2 / h hauv 1 lub hnub. Kev ua kom dej hnub ci raws li h-LAH kuj tau ua kom pom kev ua haujlwm ntev thiab cov khoom tiv thaiv kev ua qias tuaj yeem tiv thaiv cov pa phem ionic. Cov kev tshawb fawb tau luam tawm hauv daim ntawv hu ua "Cov nplooj cog uas tau tshoov siab los ntawm lub hnub ci uas tsav los ntawm lub tshuab lim dej rau kev tsim dej huv zoo" hauv Science subjournal Science Advances ".
- Angew: Cov ntaub ntawv COF nrog superhydrophilicity thiab dav wavelength lub teeb absorption rau photothermal dej evaporation
Qhov hydrophobicity thiab kev nqus lub teeb tsawg ntawm cov porous organic polymers, tshwj xeeb tshaj yog nyob rau hauv thaj chaw ze-infrared (NIR), yog ob qho kev txwv uas cuam tshuam lawv daim ntawv thov hauv lub hnub ci tsim hluav taws xob (SSG). Cov kws tshawb fawb hauv Xiaoli Yan pawg ntawm Jilin University tau tsim ib lub covalent organic framework (COF) raws li 1,4,5,8 tetrakis (phenylamino) anthracene-9,10-dione (TPAD) (TPAD-COF), uas yog tus cwj pwm los ntawm superhydrophilicity thiab kev nqus lub teeb dav dav uas npog SSG los ntawm tag nrho UV / pom NIR cheeb tsam. TPAD-COF, ua cov khoom siv hloov pauv photothermal zoo yam tsis muaj cov khoom ntxiv, qhia txog kev ua dej zoo heev ntawm 1.42 kg / m2 / h thiab ua tiav kev hloov pauv hluav taws xob siab ntawm 94% nyob rau hauv ib qho kev siv hluav taws xob hnub ci. Kev nthuav dav ntxiv ntawm TPAD-raws li COF lub teeb nqus tau ua tiav los ntawm kev hloov kho tom qab-synthetic ntawm chelated BF2 molecules. Kev sim thiab kev tshuaj xyuas kev tswj hwm tsis tu ncua lees paub tias qhov hydrophilicity ntawm cov khoom siv hloov pauv photothermal ua lub luag haujlwm tseem ceeb hauv TPAD-based COFs tam sim no siv rau kev ua kom dej photothermal evaporation. Cov haujlwm tshawb fawb, hu ua "Superhydrophilic2D Covalent Organic Frameworks as Broadband Absorbers for Efficient Solar Steam Generation," tau luam tawm hauv phau ntawv xov xwm thoob ntiaj teb zoo tshaj plaws Angewise. Cov haujlwm tau luam tawm hauv phau ntawv xov xwm thoob ntiaj teb zoo tshaj plaws Angew. Chem. Int. Ed.
- JACS: Hydrophilic-hydrophobic dual-region COF/graphene hydrogel rau photothermal dej evaporation
Kev ua kom dej noo los ntawm lub hnub ci yog ib txoj kev kho dej uas siv tau ntev thiab pab txo qhov tsis muaj dej txaus thoob ntiaj teb. Txawm li cas los xij, txoj kev no ntsib teeb meem loj heev vim yog kev siv hluav taws xob ntau thiab kev ua kom dej noo tsawg. Pawg neeg ntawm Prof. Arne Thomas ntawm Technical University of Berlin, Lub Tebchaws Yelemees, tau tshaj tawm txog cov organic framework (COF)/graphene dual-region hydrogel uas muaj ob qho tib si hydrophilic thiab hydrophobic thaj chaw hauv ib qho khoom siv los ntawm kev yooj yim hauv kev loj hlob. Lub hydrophilic COF npog ib feem ntawm thaj chaw graphene hydrophobic. Los ntawm kev tswj hwm meej ntawm ob thaj chaw ntub dej, cov hydrogel hybrid qhia txog kev sau lub teeb zoo, kev ntub dej tau zoo, cov dej zoo, thiab txo qhov xav tau zog rau kev ua kom dej noo. Ua lub zog nqus dej hnub ci, lub hydrogel dual-region ua tiav tus nqi tsim dej txog li 3.69 kg / m2 / h rau 1 lub hnub ci irradiation (1kw / m2), uas sib piv rau lwm cov ntaub ntawv siab heev. Tsis tas li ntawd, cov hydrogel evaporator no tuaj yeem siv los tsim dej haus los ntawm dej hiav txwv thiab dej phwj tuaj, qhia txog lub peev xwm ntawm kev kho dej. Cov haujlwm tshawb fawb tau luam tawm hauv phau ntawv xov xwm JACS ua "A Covalent Organic Framework/Graphene Dual-Region Hydrogel for Enhanced Solar-Driven Water Generation", JACS, ib phau ntawv xov xwm thoob ntiaj teb sab saum toj.
- Kev Txhim Kho ntawm Kev Tshawb Fawb: Cov qauv ntawm cov hniav paj dej uas tau tshoov siab los ntawm cov qauv ntawm cov dej kub uas ua haujlwm tau zoo heev
Nyob rau xyoo tas los no, kev tsim cov pa dej los ntawm lub hnub ci tau pom tias muaj peev xwm ua tau zoo heev rau kev hloov pauv hluav taws xob rau kev tshem dej ntsev thiab kev kho dej khib nyiab. Txawm li cas los xij, cov nqi evaporation siab tsis tuaj yeem tswj tau vim muaj kev sib sau ua ke ntawm cov av qias neeg lossis ntsev ntawm lub hnub ci absorber. Kev puas tsuaj sai dua thaum cov solute concentration nce ntxiv. Txhawm rau daws qhov teeb meem no, Prof. Jia Zhu pawg ntawm Nanjing University, tau tshoov siab los ntawm cov qauv ntawm nplooj paj dej, tau tsim cov qauv ntau theem (Water-lily-inspired Hierarchical Structure (WHS) photothermal-vapor conversion device, uas tuaj yeem ua tiav 80% photothermal conversion efficiency thaum kho 10 wt% ntawm cov dej ntsev uas muaj zog heev thiab 30 wt% ntawm cov dej khib nyiab. Nws tsim nyog hais tias qhov kev hloov pauv photothermal tsis txo qis ntau thaum kho cov dej ntsev thiab cov dej khib nyiab uas muaj zog heev kom txog thaum cov dej khib nyiab ua tiav (piv txwv li, "zero discharge"), thiab qhov chaw tseem huv. Cov haujlwm tau luam tawm hauv Science Advance hauv qab lub npe "A Water-lily-inspired Hierarchical Design for Stable and Efficient Solar Evaporation of High Salinity Brine".
- Lub zog nano: Molybdenum disulfide rau kev ua kom dej sov photothermal
Cov kws tshawb fawb hauv Lifeng Wan pawg ntawm Deakin University's Institute for Frontier Materials tau tsim cov qauv hloov pauv hlau disulfide thiab nitrogen-rich nitride heterostructures rau lub hnub ci dej evaporation los ntawm kev hloov pauv crystal ib nrab. Tshwj xeeb, cov qauv 2D heterostructures no qhia txog kev nqus spectral zoo dua hauv infrared ntau yam thiab kev ruaj khov tshuaj zoo heev hauv ntau yam kev daws teeb meem, suav nrog dej, acids thiab bases. Qhov tseem ceeb tshaj, vim yog qhov kev nqus spectral zoo dua thiab txo qhov cua sov poob, MoS2-Mo5N6/ melamine foam (MF) lub hnub ci thermal device qhia txog kev nqus dej siab (2.31 kg m-2h-1) thiab kev hloov pauv zoo (106.6%), uas yog 1.4 thiab 4.7 npaug siab dua li MoS2/MF thiab MF/water lub hnub ci, raws li. Cov haujlwm no muab cov qauv 2D-2D TMDs-nitrogen-rich nitride heterostructures nrog kev ua tau zoo photothermal rau lub hnub ci dej tsim. Cov haujlwm no tau luam tawm hauv Nano zog, ib phau ntawv xov xwm thoob ntiaj teb sab saum toj, raws li "Advanced 2D-2D heterostructures ntawm kev hloov pauv hlau dichalcogenides thiab nitrogen-nplua nuj nitrides rau hnub ci dej tiam".
Kev siv tshuab ua kom dej noo los ntawm lub hnub ci photothermal yuav daws tau qhov teeb meem tsis txaus dej huv thoob ntiaj teb, qhov yuav tsum tau daws tam sim no yog kev npaj cov khoom siv photothermal pheej yig, kev ua haujlwm zoo, nrog rau kev ruaj khov thiab kev yooj yim siv rau hauv cov chaw siv tau, tos ntsoov yuav muaj ntau yam tshwm sim yav tom ntej rau kev pab thaum ntxov ntawm tib neeg!
Yog xav paub ntxiv txog Melamine Foam, thov hu rau peb ntawm [email protected] lossis hu rau peb ntawm: +86-28-8411-1861.
Qee cov duab thiab cov ntawv luam tawm los ntawm Is Taws Nem, thiab cov ntawv pov thawj yog los ntawm tus sau thawj. Yog tias muaj kev ua txhaum cai, thov hu rau peb kom tshem tawm.