PMID- 31763808
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20191230
LR  - 20191230
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 11
IP  - 51
DP  - 2019 Dec 26
TI  - Hierarchical TiO(2):Cu(2)O Nanostructures for Gas/Vapor Sensing and CO(2) 
      Sequestration.
PG  - 48466-48475
LID - 10.1021/acsami.9b18824 [doi]
AB  - We investigate the effect of high-surface-area self-assembled TiO(2):Cu(2)O 
      nanostructures for CO(2) and relative humidity gravimetric detection using 
      polyethylenimine (PEI), 1-ethyl-3-methylimidazolium (EMIM), and polyacrylamide 
      (PAAm). Introduction of hierarchical TiO(2):Cu(2)O nanostructures on the surface 
      of quartz crystal microbalance sensors is found to significantly improve 
      sensitivity to CO(2) and to H(2)O vapor. The response of EMIM to CO(2) increases 
      fivefold for 100 nm-thick TiO(2):Cu(2)O as compared to gold. At ambient CO(2) 
      concentrations, the hierarchical assembly operates as a sensor with excellent 
      reversibility, while at higher pressures, the CO(2) desorption rate decreases, 
      suggesting possible application for CO(2) sequestration under these conditions. 
      The gravimetric response of PEI to CO(2) increases by a factor of 3 upon 
      introduction of a 50 nm TiO(2):Cu(2)O layer. The PAAm gravimetric response to 
      water vapor also increases by a factor of 3 and displays improved reversibility 
      with the addition of 50 nm TiO(2):Cu(2)O structures. We found that TiO(2):Cu(2)O 
      can be used to lower the detection limits for CO(2) sensing with EMIM and PEI and 
      lower the detection limits for H(2)O sensing with PAAm by over a factor of 2. 
      Coarse-grained and all-atom molecular dynamics simulations indicate the 
      dissociative character of ionic liquid assembly on TiO(2):Cu(2)O interfaces and 
      different distributions of CO(2) and H(2)O molecules on bare and ionic 
      liquid-coated surfaces, confirming experimental observations. Overall, our 
      results show high potential of hierarchical assemblies of TiO(2):Cu(2)O/room 
      temperature ionic liquid and polymer films for sensors and CO(2) sequestration.
FAU - Muckley, Eric S
AU  - Muckley ES
AUID- ORCID: 0000-0001-7114-5424
FAU - Aytug, Tolga
AU  - Aytug T
AUID- ORCID: 0000-0001-7971-5508
FAU - Mayes, Richard
AU  - Mayes R
AUID- ORCID: 0000-0002-7457-3261
FAU - Lupini, Andrew R
AU  - Lupini AR
FAU - Carrillo, Jan-Michael Y
AU  - Carrillo JY
AUID- ORCID: 0000-0001-8774-697X
FAU - Goswami, Monojoy
AU  - Goswami M
AUID- ORCID: 0000-0002-4473-4888
FAU - Sumpter, Bobby G
AU  - Sumpter BG
AUID- ORCID: 0000-0001-6341-0355
FAU - Ivanov, Ilia N
AU  - Ivanov IN
AUID- ORCID: 0000-0002-6726-2502
LA  - eng
PT  - Journal Article
DEP - 20191210
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
OTO - NOTNLM
OT  - CO2
OT  - CO2 sequestration
OT  - Cu2O
OT  - QCM
OT  - TiO2
OT  - humidity
OT  - ionic liquid
OT  - molecular dynamics simulations
OT  - polymer
OT  - sensing
EDAT- 2019/11/26 06:00
MHDA- 2019/11/26 06:01
CRDT- 2019/11/26 06:00
PHST- 2019/11/26 06:00 [pubmed]
PHST- 2019/11/26 06:01 [medline]
PHST- 2019/11/26 06:00 [entrez]
AID - 10.1021/acsami.9b18824 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2019 Dec 26;11(51):48466-48475. doi: 
      10.1021/acsami.9b18824. Epub 2019 Dec 10.