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1

A new direction in design and manufacture of co-sensitized dye solar cells : toward concurrent optimization of power conversion efficiency and durability

Hosseinnezhad M., Shadman A., Saeb M. R., Mohammadi Y.

Opto-Electronics Review

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2017

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Vol. 25, No. 3

229--237

EN

A novel methodology was implemented in the present study to concurrently control power conversion efficiency (η) and durability (D) of co-sensitized dye solar cells. Applying response surface methodology (RSM) and Desirability Function (DF), the main influential assembling (dye volume ratio and anti-aggregation agent concentration) and operational (performance temperature) parameters were systematically changed to probe their main and interactive effects on the η and D responses. Individual optimization based on RSM elucidated that D can be solely controlled by changing the ratio of vat-based organic photosensitizers, whereas η takes both effects of dye volume ratio and anti-aggregation concentration into account. Among the studied factors, the performance temperature played the most vital role in η and D regulation. In particular, however, multi-objective optimization by DF explored the degree to which one should be careful about manipulation of assembling and operational parameters in the way maximization of performance of a co-sensitized dye solar cell.

2

Identyfikacja naturalnych substancji barwiących obecnych w farbach malarskich pochodzenia historycznego

Otłowska O., Śliwka-Kaszyńska M., Kołodziejczyk A.

Analityka : nauka i praktyka

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2015

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nr 2

52--55

PL

Naturalne barwiniki organiczne są komponentami wielu obiektów dziedzictwa kulturowego. Identyfikacja substancji barwiących obecnych w farbach historycznych dostarcza istotnych informacji dla szerokiego grona specjalistów zajmujących się dziełami sztuki.

3

Precipitation of heavy metals from industrial wastewater by Desulfovibrio desulfuricans

Kosińska K., Miśkiewicz T.

Environment Protection Engineering

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2012

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Vol. 38, nr 2

51--60

EN

Wastewater from leather tanning, electroplating, organic dye production and non-ferrous metallurgy was treated in a batch anaerobic bioreactor of the total volume of 2.7 dm3 using Desulfovibrio desulfuricans for the removal of Crtotal, Cu(II), Fe(II), Ni(II) and Zn(II) as metal sulfides. Except the tannery effluent, the wastewater samples were supplemented with an appropriate quantity of swine manure in order to enrich them with simple organic compounds and biogenic elements (N and P), and thus upgrade the sulfate reducing activity of D. desulfuricans. The metal removal efficiencies obtained varied from 85.2% to 98.96%.

4

Photocatalytic degradation of an organic dye in some aqueous buffer solutions using nano titanium dioxide: A kinetic study

Montazerozohori M., Nasr-Esfahani M., Joohari S.

Environment Protection Engineering

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2012

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Vol. 38, nr 3

45--55

EN

Photocatalytic degradation of an organic dye, emerald green, on nano titanium dioxide (anatase 99.5%) at basic buffer pH of 7, 8 and 9 has been investigated. The effects of various operating parameters such as initial concentration of dye, catalyst dosage, bufferic pH and irradiation time on photocatalytic degradation have been studied in a photoreactor cell containing high pressure mercury lamp to obtain the optimum conditions. COD removal was found to be 65-71% confirming considerable mineralization. The photodegradation of the dye obeyed a pseudo-first order kinetics according to the Langmuir-Hinshelwood model at all used buffer pH. The observed rate constants (Kobs) of photocatalytic degradation were 3.3 ×10-2 min-1, 7.09 × 10-2 min-1 and 1.32 × 10-1 min-1 at buffer pH of 7-9 respectively. Furthermore, the Langmuir-Hinshelwood rate constants, kr and adsorption constants, KA are reported for current process at various buffer pH.

5

Effect of dye content in a treated solution on performance of the UF ceramic membrane

Kawiecka-Skowron J., Majewska-Nowak K.

Environment Protection Engineering

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2011

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Vol. 37, nr 2

5-12

EN

Low-pressure membrane processes have been studied in order to treat aqueous solutions of dyes. The influence of dye concentration (10, 20, 100 g/m3) on separation efficiencies of organic dyes (Methyl Orange, Titan Yellow and Direct Black) was analyzed. CeRAM INSIDE®(Tami Industries) membranes with various cut-off values (1, 15 kDa) were examined. The ultrafiltration process was carried out at the transmembrane pressures of: 0.03, 0.06, and 0.09 MPa. It was found that the process efficacy was affected not only by the kind of dye, but also by the dye concentration, applied pressure and membrane cut-off. With increasing dye content in the treated solution the rejection coefficient improved.

6

Skuteczność usuwania naturalnych i antropogenicznych barwnych substancji organicznych w procesie ultrafiltracji na membranach ceramicznych

Majewska-Nowak K., Kawiecka-Skowron J., Kabsch-Korbutowicz M., Urbanowska A.

Ochrona Środowiska

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2010

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Vol. 32, nr 4

11-14

PL

Porównano skuteczność usuwania anionowych barwników organicznych oraz naturalnych substancji organicznych z roztworów wodnych w procesie ultrafiltracji z wykorzystaniem membran ceramicznych. Zbadano wpływ granicznej rozdzielczości membrany, prędkości przepływu oczyszczanego roztworu przy powierzchni membrany oraz masy cząsteczkowej barwników i początkowej zawartości substancji organicznych w wodzie na skuteczność procesu. Badaniom poddano roztwory modelowe siedmiu anionowych barwników organicznych o masie cząsteczkowej od 327 Da do 1060 Da oraz sześciu roztworów zawierających naturalne substancje organiczne charakteryzujących się intensywnością barwy od 22 gPt/m3 do 125 gPt/m3. Stwierdzono, iż roztwory barwników, mimo ich mniejszego ciężaru cząsteczkowego, były oczyszczane z większą skutecznością.

EN

Seven aqueous solutions of anionic organic dyes (differing in molecular weight from 327 Da to 1060 Da) and six aqueous solutions of natural organic matter - NOM (varying in color between 22 gPt/m3 and 125 gPt/m3) were subjected to an ultrafiltration process, which involved ceramic membranes of different cut-off values. The efficiency of the ultrafiltration process was evaluated in terms of the membrane's cut-off value, the linear velocity of the solution near the membrane surface, the molecular weights of the dyes, and the initial NOM concentrations in the solutions tested. The comparison between the separation effects obtained for the two types of colored organic substances has demonstrated that the anionic organic dyes were removed from the solution with a higher efficiency in spite of their lower molecular weights.

7

Desalination of reactive yellow 85 by nanofiltration

Mikulášek P., Kopecký V.

Environment Protection Engineering

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2005

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Vol. 31, nr 3-4

187-198

EN

Three types (Desal 5 DK, Desal 5 DL, PES 10) of nanofiltration membranes were tested to evaluate optimal operating conditions for flux values and salt rejection in the separation of reactive dye/salt mixtures. Effects of pressure and feed composition on the separation were investigated. Experiments showed that feed composition had a significant effect on flux values. The Donnan effect was greatly responsible for salt rejection. Of the membranes tested one membrane was chosen and batch diafiltration at constant pressure and constant volume was performed through a chosen membrane. The main purpose of diafiltration experiments was to measure the dependence of the amount of the salt removed and the concentration of the salt in feed on time. This experiment was carried out in a dynamic cell.