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In-situ evaluation ...
In-situ evaluation of dye adsorption on TiO2 using QCM
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- Besharat, Zahra (författare)
- KTH,Materialfysik, MF,Yt- och korrosionsvetenskap,KTH Royal Inst Technol, Dept Chem, Div Surface & Corros Sci, S-10044 Stockholm, Sweden.;KTH Royal Inst Technol, Mat Phys, ICT, S-16440 Stockholm, Sweden.
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- Alvarez-Asencio, Ruben (författare)
- KTH,Yt- och korrosionsvetenskap,KTH Royal Inst Technol, Dept Chem, Div Surface & Corros Sci, S-10044 Stockholm, Sweden.;IMDEA Nanociencia, Inst Adv Studies, Faraday 9,Campus Cantoblanco, Madrid 28049, Spain.
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- Tian, Haining, 1983- (författare)
- Uppsala universitet,Fysikalisk kemi
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- Yu, S. (författare)
- KTH Royal Inst Technol, Dept Chem Fiber & Polymer Technol, S-10044 Stockholm, Sweden.
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- Johnson, C. Magnus (författare)
- KTH,Yt- och korrosionsvetenskap,KTH Royal Inst Technol, Dept Chem, Div Surface & Corros Sci, S-10044 Stockholm, Sweden.
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- Göthelid, Mats (författare)
- KTH,Materialfysik, MF,KTH Royal Inst Technol, Mat Phys, ICT, S-16440 Stockholm, Sweden.
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- Rutland, Mark W. (författare)
- KTH,Yt- och korrosionsvetenskap,KTH Royal Inst Technol, Dept Chem, Div Surface & Corros Sci, S-10044 Stockholm, Sweden.
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(creator_code:org_t)
- 2017-03-13
- 2017
- Engelska.
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Ingår i: EPJ Photovoltaics. - : EDP Sciences. - 2105-0716. ; 8
- Relaterad länk:
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https://doi.org/10.1...
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https://www.epj-pv.o...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We measured the adsorption characteristics of two organic dyes; triphenylamine-cyanoacrylic acid (TPA-C) and phenoxazine (MP13), on TiO2, directly in a solution based on quartz crystal microbalance (QCM). Monitoring the adsorbed amount as a function of dye concentration and during rinsing allows determination of the equilibrium constant and distinction between chemisorbed and physisorbed dye. The measured equilibrium constants are 0.8 mM(-1) for TPA-C and 2.4 mM(-1) for MP13. X-ray photoelectron spectroscopy was used to compare dried chemisorbed layers of TPA-C prepared in solution with TPA-C layers prepared via vacuum sublimation; the two preparation methods render similar spectra except a small contribution of water residues (OH) on the solution prepared samples. Quantitative Nanomechanical Mapping Atomic Force Microscopy (QNM-AFM) shows that physisorbed TPA-C layers are easily removed by scanning the tip across the surface. Although not obvious in height images, adhesion images clearly demonstrate removal of the dye.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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