Polymer anion-selective membrane for electrolytic water splitting: The impact of a liquid electrolyte composition on the process parameters and long-term stability

2014 ◽  
Vol 39 (10) ◽  
pp. 4779-4787 ◽  
Author(s):  
Jaromír Hnát ◽  
Martin Paidar ◽  
Jan Schauer ◽  
Karel Bouzek
Keyword(s):  
Water Splitting ◽  
Process Parameters ◽  
Liquid Electrolyte ◽  
Electrolyte Composition ◽  
Term Stability ◽  
Long Term Stability ◽  
Selective Membrane ◽  
The Impact

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

Separating the impact of oxygen and water on the long-term stability of n-channel perylene diimide thin-film transistors

2015 ◽  
Vol 26 ◽  
pp. 340-344 ◽  
Author(s):  
Ute Zschieschang ◽  
Konstantin Amsharov ◽  
Martin Jansen ◽  
Klaus Kern ◽  
Hagen Klauk ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Perylene Diimide ◽  
Term Stability ◽  
Long Term Stability ◽  
The Impact

Long-term stability of dye-sensitized solar cells using a facile gel polymer electrolyte

2018 ◽  
Vol 42 (16) ◽  
pp. 13256-13262 ◽  
Author(s):  
A. Ma’alinia ◽  
H. Asgari Moghaddam ◽  
E. Nouri ◽  
M. R. Mohammadi
Keyword(s):  
Solar Cells ◽  
Gel Polymer Electrolyte ◽  
Dye Sensitized Solar Cells ◽  
Liquid Electrolyte ◽  
Term Stability ◽  
Long Term Stability ◽  
Dye Sensitized ◽  
Efficient Performance ◽  
Sensitized Solar Cells

Hydroxypropyl cellulose as a polymeric gelator agent was incorporated in the liquid electrolyte of dye-sensitized solar cells, showing long-term stability and efficient performance.

scholarly journals Amorphous outperforms crystalline nanomaterials: surface modifications of molecularly derived CoP electro(pre)catalysts for efficient water-splitting

2019 ◽  
Vol 7 (26) ◽  
pp. 15749-15756 ◽  
Author(s):  
Rodrigo Beltrán-Suito ◽  
Prashanth W. Menezes ◽  
Matthias Driess
Keyword(s):  
Water Splitting ◽  
Crystalline Phase ◽  
Surface Modifications ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Low Overpotential

Amorphous CoP outperforms the crystalline phase in the OER, HER and overall water splitting with low overpotential and remarkable long-term stability.

Atomic-Scale Origin of Long-Term Stability and High Performance ofp-GaN Nanowire Arrays for Photocatalytic Overall Pure Water Splitting

2016 ◽  
Vol 28 (38) ◽  
pp. 8388-8397 ◽  
Author(s):  
Md Golam Kibria ◽  
Ruimin Qiao ◽  
Wanli Yang ◽  
Idris Boukahil ◽  
Xianghua Kong ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Pure Water ◽  
Nanowire Arrays ◽  
Atomic Scale ◽  
Term Stability ◽  
Long Term Stability ◽  
Gan Nanowire

The impact of chronic untreated hyperglycaemia on the long-term stability of paraoxonase 1 (PON1) and antioxidant status in human sera

2013 ◽  
Vol 67 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Muiruri Macharia ◽  
Andre P Kengne ◽  
Diane M Blackhurst ◽  
Rajiv T Erasmus ◽  
Tandi E Matsha
Keyword(s):  
Antioxidant Status ◽  
Paraoxonase 1 ◽  
Term Stability ◽  
Long Term Stability ◽  
Human Sera ◽  
The Impact

scholarly journals Sensing with Chirality Pure near Infrared Fluorescent Carbon Nanotubes

2020 ◽  
Author(s):  
Robert Nißler ◽  
Larissa Kurth, ◽  
Han Li ◽  
Alexander Spreinat ◽  
Ilyas Kuhlemann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dna Sequences ◽  
Near Infrared ◽  
Single Wall Carbon Nanotubes ◽  
Term Stability ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Main Challenge ◽  
The Impact

Semiconducting single wall carbon nanotubes (SWCNTs) fluoresce in the near infrared (NIR) and the emission wavelength depends on their chirality (n,m). Interactions with the environment affect the fluorescence and can be tailored by functionalizing SWCNTs with biopolymers such as DNA, which is the basis for fluorescent biosensors. So far, such biosensors were mainly assembled from mixtures of SWCNT chiralities with large spectral overlap, which affects sensitivity as well as selectivity and prevents multiplexed sensing. The main challenge to gain chirality pure sensors has been to combine approaches to isolate specific SWCNTs and generic (bio)functionalization approaches. Here, we created chirality pure SWCNT-based NIR biosensors for important analytes such as neurotransmitters and investigated the impact of SWCNT chirality/handedness as well as long-term stability and sensitivity. For this purpose, we used aqueous two-phase extraction (ATPE) to gain chirality pure (6,5)-, (7,5)-, (9,4)- and (7,6)- SWCNTs (emission at ~ 990, 1040, 1115 and 1130 nm). Exchange of the surfactant sodium deoxycholate (DOC) to specific singlestranded (ss)DNA sequences yielded monochiral sensors for small analytes (dopamine, riboflavin, ascorbic acid, pH). DOC used in the separation process was completely removed because residues impaired sensing. The assembled monochiral sensors were up to 10 times brighter than their non-purified counterparts and the ssDNA sequence affected absolute fluorescence intensity as well as colloidal (long-term) stability and selectivity for the analytes. (GT)40-(6,5)-SWCNTs displayed the maximum fluorescence response to the neurotransmitter dopamine (+140 %, Kd = 1.9 x10-7 M) and a long-term stability > 14 days. Furthermore, the specific ssDNA sequences imparted selectivity to the analytes independent of SWCNT chirality and handedness of (+/-) (6,5)-SWCNTs. These monochiral/single-color SWCNTs enabled ratiometric/multiplexed sensing of dopamine, riboflavin, H2O2 and pH. In summary, we demonstrated the assembly, characteristics and potential of monochiral (single-color) SWCNTs for multiple NIR fluorescent sensing applications.

scholarly journals Sensing with Chirality Pure near Infrared Fluorescent Carbon Nanotubes

2020 ◽  
Author(s):  
Robert Nißler ◽  
Larissa Kurth, ◽  
Han Li ◽  
Alexander Spreinat ◽  
Ilyas Kuhlemann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dna Sequences ◽  
Near Infrared ◽  
Single Wall Carbon Nanotubes ◽  
Term Stability ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Main Challenge ◽  
The Impact

Semiconducting single wall carbon nanotubes (SWCNTs) fluoresce in the near infrared (NIR) and the emission wavelength depends on their chirality (n,m). Interactions with the environment affect the fluorescence and can be tailored by functionalizing SWCNTs with biopolymers such as DNA, which is the basis for fluorescent biosensors. So far, such biosensors were mainly assembled from mixtures of SWCNT chiralities with large spectral overlap, which affects sensitivity as well as selectivity and prevents multiplexed sensing. The main challenge to gain chirality pure sensors has been to combine approaches to isolate specific SWCNTs and generic (bio)functionalization approaches. Here, we created chirality pure SWCNT-based NIR biosensors for important analytes such as neurotransmitters and investigated the impact of SWCNT chirality/handedness as well as long-term stability and sensitivity. For this purpose, we used aqueous two-phase extraction (ATPE) to gain chirality pure (6,5)-, (7,5)-, (9,4)- and (7,6)- SWCNTs (emission at ~ 990, 1040, 1115 and 1130 nm). Exchange of the surfactant sodium deoxycholate (DOC) to specific singlestranded (ss)DNA sequences yielded monochiral sensors for small analytes (dopamine, riboflavin, ascorbic acid, pH). DOC used in the separation process was completely removed because residues impaired sensing. The assembled monochiral sensors were up to 10 times brighter than their non-purified counterparts and the ssDNA sequence affected absolute fluorescence intensity as well as colloidal (long-term) stability and selectivity for the analytes. (GT)40-(6,5)-SWCNTs displayed the maximum fluorescence response to the neurotransmitter dopamine (+140 %, Kd = 1.9 x10-7 M) and a long-term stability > 14 days. Furthermore, the specific ssDNA sequences imparted selectivity to the analytes independent of SWCNT chirality and handedness of (+/-) (6,5)-SWCNTs. These monochiral/single-color SWCNTs enabled ratiometric/multiplexed sensing of dopamine, riboflavin, H2O2 and pH. In summary, we demonstrated the assembly, characteristics and potential of monochiral (single-color) SWCNTs for multiple NIR fluorescent sensing applications.

scholarly journals Lip-to-incisor Relationship and Postorthodontic Long-term Stability of Cover-bite Treatment

2006 ◽  
Vol 76 (6) ◽  
pp. 942-949 ◽  
Author(s):  
Bernd G. Lapatki ◽  
Dirk Baustert ◽  
Jürgen Schulte-Mönting ◽  
Sibylle Frucht ◽  
Irmtrud E. Jonas
Keyword(s):  
Central Incisor ◽  
Lower Lip ◽  
Maxillary Central Incisor ◽  
Term Stability ◽  
Long Term Stability ◽  
Lateral Cephalograms ◽  
Inducing Factors ◽  
Line Level ◽  
The Impact

Abstract Objective: To investigate the impact of a persisting high lip line and other potential relapse-inducing factors on long-term stability of orthodontic correction of retroinclined maxillary central incisors. Materials and Methods: Thirty-one cover-bite (“Deckbiss”) patients with retroinclined maxillary central incisors and a deep frontal overbite were evaluated. The maxillary central incisor inclination was determined odontometrically with study models made pretreatment, posttreatment, and at a follow-up examination (mean posttherapeutic interval: 9.0 years). The lip-to-incisor relationship, the interincisal angle, and the anteroposterior maxillary central incisor position were measured on lateral cephalograms taken after active treatment. Results: The relapse tendency of the orthodontic correction of the retroinclined maxillary central incisors displayed great interindividual variability with a range of posttherapeutic inclination change of −6.75° to +8.00°. Multiple regression analysis revealed an increased tendency for relapse in patients with (1) a high posttherapeutic (dorsal) lip line level combined with the maxillary central incisor and lower lip contact only in the incisal crown area (P < .01) and (2) a marked therapeutically induced inclination change of the maxillary central incisors (P < .05). Interrelations between the relapse of the corrected maxillary central incisors and other evaluated parameters were not statistically significant. Conclusions: For maximum treatment stability, the elimination of an excessive overlap of the upper incisors by the lower lip should be regarded as one of the most important therapeutic objectives when treating this malocclusion.

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