Surface Modification of Polystyrene Beads by UV/Ozone Treatment

2011 ◽  
Vol 264-265 ◽  
pp. 1532-1537 ◽  
Author(s):  
A.N. Yusilawati ◽  
M. Maizirwan ◽  
Iis Sopyan ◽  
M.S. Hamzah ◽  
K.H. Ng ◽  
...  
Keyword(s):  
Treatment Time ◽  
Ozone Treatment ◽  
Polystyrene Bead ◽  
Hydroxyl Groups ◽  
Distilled Water ◽  
Polystyrene Beads ◽  
Chemically Modified ◽  
Set Up ◽  
Average Size ◽  
Uv Ozone

It is known that polystyrene must be chemically modified to make its surface amenable to covalent cross-linking with protein. The aim of this study was to set up a UV/Ozone system and investigate the effects of UV/Ozone treatment on polystyrene surface. Microsize polystyrene beads with an average size of 150 μm in diameter were treated with and without distilled water at the same treatment time, ozone flow-rate and UV intensity. The treated beads were analyzed by ATR-FTIR, SEM, EDX and hydrophilicity measurement. The results show that the hydrophilicity of the surface of polystyrene beads was increased after the UV/ozone treatment and the introduction of carbonyl, carboxyl and hydroxyl groups on the polystyrene beads surface was also confirmed. It was demonstrated that the UV/Ozone system was effective for treatment of polystyrene bead and the best result was obtained without distilled water.

scholarly journals UV-Ozone Treatment on Cs2CO3Interfacial Layer for the Improvement of Inverted Polymer Solar Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yusheng Xin ◽  
Zixuan Wang ◽  
Lu Xu ◽  
Xiaowei Xu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Indium Tin Oxide ◽  
Treatment Time ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Annealing Treatment ◽  
Open Circuit ◽  
Ozone Treatment ◽  
Shunt Resistance ◽  
Uv Ozone

Inverted configuration polymer solar cells (IPSCs) were prepared by using Cs2CO3modified indium tin oxide (ITO) substrates as cathode and MoO3/Al as anode, ITO/Cs2CO3/P3HT:PCBM/MoO3/Al. The interfacial Cs2CO3layers were conducted with annealing treatment and different time UV-Ozone treatment. The power conversion efficiency (PCE) of IPSCs was improved to 1% when the UV-Ozone treatment time is 15 minutes, with the open-circuit voltage of 0.48 V, short-circuit current density of 5.4 mA/cm2, and fill factor of 39%. The improvement of IPSCs should be attributed to the increased electron transporting and collection ability of Cs2CO3layer induced by UV-Ozone treatment. The underlying mechanism of PCE improvement was discussed in terms of series and shunt resistance of cells induced by UV-Ozone treatment on Cs2CO3layer, and the mole ratio of Cs to O of Cs2CO3layer with different UV-Ozone treatment was investigated by scanning electron microscopy operating in the mode for in situ energy dispersive X-ray (EDX) spectra.

Enhancing the power generation of Rhodopseudomonas palustris-based MFC

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1261-1268
Author(s):  
Shu Otani ◽  
Dang-Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
Activated Carbon ◽  
Rhodopseudomonas Palustris ◽  
Ozone Treatment ◽  
Maximum Power Density ◽  
On Demand ◽  
Long Time ◽  
Dry Conditions ◽  
Carbon Sheet ◽  
Uv Ozone

In this study, a portable and disposable paper-based microbial fuel cell (MFC) was fabricated. The MFC was powered by Rhodopseudomonas palustris bacteria (R. palustris). An activated carbon sheet-based anode pre-loaded organic matter (starch) and R. palustris was used. By using starch in the anode, R. palustris-loaded on the anode could be preserved for a long time in dry conditions. The MFC could generate electricity on-demand activated by adding water to the anode. The activated carbon sheet anode was treated by UV-ozone treatment to remove impurities and to improve its hydrophilicity before being loaded with R. palustris. The developed MFC could generate the maximum power density of 0.9 μW/cm2 and could be preserved for long-term usage with little performance degradation (10% after four weeks).

Effect of UV/ozone treatment on hysteresis of pentacene thin-film transistor with polymer gate dielectric

2009 ◽  
Vol 53 (6) ◽  
pp. 621-625 ◽  
Author(s):  
Jae Bon Koo ◽  
Seong Yeol Kang ◽  
In Kyu You ◽  
Kyung Soo Suh
Keyword(s):  
Thin Film ◽  
Gate Dielectric ◽  
Thin Film Transistor ◽  
Ozone Treatment ◽  
Uv Ozone

Effect of UV–ozone treatment on electrical properties of PEDOT:PSS film

2011 ◽  
Vol 12 (2) ◽  
pp. 279-284 ◽  
Author(s):  
Takahiro Nagata ◽  
Seungjun Oh ◽  
Toyohiro Chikyow ◽  
Yutaka Wakayama
Keyword(s):  
Electrical Properties ◽  
Ozone Treatment ◽  
Uv Ozone

Surface modification of polycarbonate and polyethylene naphtalate foils by UV-ozone treatment and μPlasma printing

2014 ◽  
Vol 290 ◽  
pp. 381-387 ◽  
Author(s):  
R.O.F. Verkuijlen ◽  
M.H.A. van Dongen ◽  
A.A.E. Stevens ◽  
J. van Geldrop ◽  
J.P.C. Bernards
Keyword(s):  
Surface Modification ◽  
Ozone Treatment ◽  
Uv Ozone

Enhanced Performance of PDPP3T/${\rm PC}_{60}{\rm BM}$ Solar Cells Using High Boiling Solvent and UV - Ozone Treatment

2013 ◽  
Vol 60 (5) ◽  
pp. 1763-1768 ◽  
Author(s):  
Prajwal Adhikary ◽  
Swaminathan Venkatesan ◽  
Purna P. Maharjan ◽  
David Galipeau ◽  
Qiquan Qiao
Keyword(s):  
Solar Cells ◽  
Ozone Treatment ◽  
High Boiling Solvent ◽  
Uv Ozone

scholarly journals Effects of Current on Arc Fabrication of Cu Nanoparticles

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
M. Z. Kassaee ◽  
F. Buazar ◽  
E. Motamedi
Keyword(s):  
Thermal Stability ◽  
Distilled Water ◽  
Face Centered Cubic ◽  
Cu Nanoparticles ◽  
Dta Analysis ◽  
Face Centered ◽  
Average Size ◽  
20 Nm ◽  
Thermal Stability Of ◽  
Sem Analyses

Arc-fabricated copper nanoparticles (Cu Nps) size, morphology and the crystalline structure, as well as the yields of Nps appear sensitive to the applied currents (50–160 A) in distilled water. The results indicate that the sizes of Cu Nps are directly proportional to the currents employed. At 50 A, TEM, XRD, and SEM analyses show fabrication of relatively purest, the most dispersed, face-centered cubic (fcc) brown Cu Nps with rather smallest average size of 20 nm. At the same current, the TGA-DTA analysis reveals neither weight loss nor gain, indicating thermal stability of the fabricated Cu Nps.

scholarly journals The Effect of Steam and Glycerol Pretreatment on Chemical Contents of Oil Palm Empty Fruit Bunch (EFB)

2018 ◽  
pp. 61-67
Author(s):  
Ornjira Choopakar ◽  
Chongchin Polprasert ◽  
Panagiotis Elefsiniotis ◽  
Supawadee Polprasert
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Steam Pretreatment ◽  
Chemical Components ◽  
Distilled Water ◽  
Waste Glycerol ◽  
Empty Fruit Bunches ◽  
Pretreatment Conditions ◽  
Set Up ◽  
Water Waste

This research aimed to evaluate the effect of the type of solvent, pH, substrate loading, and reaction time on the chemical components of palm empty fruit bunches (EFB). Steam pretreatment was set up at a temperature of 121 °C and pressure of 1.18 bar, using an autoclave with substrate loading of 5, 10, 15 and 20 % w/v at reaction times of 15 and 60 min. Distilled water, waste glycerol, alkaline glycerol and acidic glycerol were compared as solvents during steam pretreatment. The results showed that with distilled water, better pretreatment was achieved at 5 % and 10 % loading for 60 min. During the pretreatment with waste glycerol at 5 % loading an increase on the reaction time from 15 to 60 min reaction resulted in a remarkable increase in reducing sugar in the liquid phase. Overall, the best steam pretreatment conditions were observed using alkaline glycerol at 5 % w/v and 15 min reaction time, resulting in holocellulose (cellulose plus hemicellulose) increase to 87.98 % and a lignin decrease to 9.17 %. However, pretreatment with glycerol for 15 min was better than those for 60 min using either glycerol or distilled water. The results suggest that waste glycerol during steam pretreatment of EFB can be utilized effectively at short reaction times and at an increased pH to achieve a high output of cellulose and hemicellulose for sugar conversion in the bioethanol fermentation process.

scholarly journals Performance improvement of the heat recovery unit with sequential type heat pipes using TiO2 nanofluid

2019 ◽  
Vol 23 (3 Part B) ◽  
pp. 1755-1764 ◽  
Author(s):  
Ahmet Ozturk ◽  
Mehmet Ozalp ◽  
Adnan Sozen ◽  
Metin Guru
Keyword(s):  
Thermal Performance ◽  
Heat Recovery ◽  
Experimental Studies ◽  
Heat Pipes ◽  
Outer Diameter ◽  
Distilled Water ◽  
Condenser Section ◽  
Recovery System ◽  
Heat Recovery System ◽  
Set Up

This paper deals with the improvement of thermal performance of the heat recovery system in air-to-air unit by using a nanofluid of TiO particles and distilled water. The 2 experimental set-up equipped with 15 copper pipes of a 1000 mm length, 10.5 mm inner diameter, and 12 mm outer diameter was used. The evaporator section consists of 450 mm of heat pipes, the condenser section is 400 mm, and the adiabatic section is 150 mm. In experimental studies, 33% of the evaporator volumes of heat pipes were filled with working fluids. Experiments were carried out at temperatures between 25?C and 90?C by using five different cooling air-flows (40, 42, 45, 61, and 84 g/s), and two different heating powers (3 kW and 6 kW) for the evaporation section, to determine heat removed from the condensation section. Trials were performed for distilled water and nanofluid respectively, and the results were compared with each other. Results revealed that a 50% recovery in the thermal performance of the heat pipe heat recovery system was achieved in the design using TiO nanofluid as the working liquid, at a heating power of 3 kW, air 2 velocity of 2.03 m/s and air-flow of 84 g/s.

Preparation and Properties of PZT Bimorph on Metal Substrate by Hydrothermal Method

2007 ◽  
Vol 329 ◽  
pp. 619-624
Author(s):  
L.Q. Du ◽  
Y. Lv ◽  
Wei Jie Dong ◽  
X.G. Gao
Keyword(s):  
Hydrothermal Method ◽  
Ferroelectric Property ◽  
Piezoelectric Coefficient ◽  
Low Cost ◽  
Metal Substrate ◽  
Driving Ability ◽  
Piezoelectric Bimorph ◽  
Pzt Film ◽  
Set Up ◽  
Average Size

Piezoelectric bimorph fabricated by hydrothermal method is presented in the paper. This method is low cost, simple and easy. In order to describe the characteristics of piezoelectric bimorph, properties of PZT film are studied by XRD and SEM. The ratio of PbTiO3/PbZrO3 in PZT is 53/47, which is around morphotropic phase boundary (MPB). PZT film is composed of cubic particles with the average size of 5μm. Density is figured out through the datum measured in experiments. The model used to analyze the driving ability of bimorph is set up; piezoelectric coefficient d31 of PZT film is worked out using this model. Finally, the ferroelectric property of the bimorph is investigated and coercive voltage of the bimorph Vc =1.67V is obtained.

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