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Your search keyword '"Dai, Xiujuan J."' showing total 161 results
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161 results on '"Dai, Xiujuan J."'

14. Generation of underwater discharges inside gas bubbles using a 30-needles-to-plate electrode.

Author

Zhiqiang Chen, Krasik, Yakov E., Cousens, Samuel, Ambujakshan, Arun T., Corr, Cormac, and Dai, Xiujuan J.

Subjects
HELIUM, ELECTRODES, ELECTRICAL conductors, ELECTRIC resistors, RADICALS (Chemistry)
Abstract

Underwater discharges inside helium (He) gas bubbles were generated using a 30- needles-to-plate electrode system with the gas flowing through the needles. The set-up allows continuous treatment of flowing water. The plasma electron temperature and density determined from spectral line intensities and profiles of the Hα and Hβ hydrogen lines were found to be 1.1±0.6 eV and ~5x1016 cm-3, respectively. These parameters are comparable with those of plasmas generated by other underwater gas bubble discharges for the production of OH radicals. The two main longlived species, hydrogen peroxide (H2O2) and nitrate ions (NO3- ), produced in plasma treated water were measured. It was found that without a continuous water flow, the energy yield of H2O2 was comparable with other underwater discharges, while with a continuous flow, the production of H2O2 appeared to be somewhat reduced by nitrites from dissolved air. [ABSTRACT FROM AUTHOR]

Published
2017
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15. Fabrication of POSS nano-composite membranes using plasma technology for solvent separation

Author

Dumee, Ludovic, Chen, Zhiqiang, Magniez, Kevin, Dai, Xiujuan J., Chen, Xiao, Dumee, Ludovic, Chen, Zhiqiang, Magniez, Kevin, Dai, Xiujuan J., and Chen, Xiao

Abstract

This thesis developed an environmentally friendly plasma process to generate advanced separation membrane materials. The membranes of tunable properties exhibited high flux and found applications in solvent separation exhibiting promising performance for cost-effective dewatering of alcohol solutions.

Published
2019

16. Cover Picture: Plasma Process. Polym. 1∕2018

Author

Ambujakshan, Arun T., primary, Pringle, Jennifer M., additional, Chen, Zhiqiang, additional, Corr, Cormac S., additional, du Plessis, Johan, additional, Hodgson, Peter D., additional, and Dai, Xiujuan J., additional

Published
2018
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20. Cover Picture: Plasma Process. Polym. 9∕2017

Author

Ambujakshan, Arun T., primary, Sadek, Abu, additional, Magniez, Kevin, additional, Mateti, Srikanth, additional, Mayes, Edwin, additional, Devi, Gayathri, additional, Pringle, Jennifer M., additional, Plessis, Johan du, additional, Chen, Zhiqiang, additional, Corr, Cormac S., additional, Hodgson, Peter D., additional, and Dai, Xiujuan J., additional

Published
2017
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25. Plasma treated water - A promising electrolyte to produce nanoporous titanium dioxide nanotubes

Author

Ambujakshan, Arun T., primary, Sadek, Abu, additional, Magniez, Kevin, additional, Mateti, Srikanth, additional, Mayes, Edwin, additional, Devi, Gayathri, additional, Pringle, Jennifer M., additional, Plessis, Johan du, additional, Chen, Zhiqiang, additional, Corr, Cormac S., additional, Hodgson, Peter D., additional, and Dai, Xiujuan J., additional

Published
2017
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28. Cover Picture: Plasma Process. Polym. 3∕2016

Author

Dai, Xiujuan J., primary, Corr, Cormac S., additional, Ponraj, Sri B., additional, Maniruzzaman, Mohammad, additional, Ambujakshan, Arun T., additional, Chen, Zhiqiang, additional, Kviz, Ladge, additional, Lovett, Robert, additional, Rajmohan, Gayathri D., additional, de Celis, David R., additional, Wright, Marion L., additional, Lamb, Peter R., additional, Krasik, Yakov E., additional, Graves, David B., additional, Graham, William G., additional, d'Agostino, Riccardo, additional, and Wang, Xungai, additional

Published
2016
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29. Investigation of the potential of plasma technology to improve the performance of solar cells

Author

Dai, Xiujuan J., Rajmohan, Gayathri Devi, Dai, Xiujuan J., and Rajmohan, Gayathri Devi

Abstract

This study explored plasma techniques to improve the efficiency of dye sensitised solar cells and perovskite solar cells. It was found that plasma functionalization of TiO2 improved dye absorption, thereby improving efficiency. Controllable nitrogen doping of TiO2 was achieved by a unique system that combines plasma with heat treatment. The doping reduced the band-gap of TiO2. A crystalline TiO2 thin film on plastic substrates was successfully achieved by a low temperature plasma method, which could potentially allow such soft and flexible substrates to be used for solar cells.

Published
2015

30. Efficient and Selectable Production of Reactive Species Using a Nanosecond Pulsed Discharge in Gas Bubbles in Liquid

Author

Dai, Xiujuan J., primary, Corr, Cormac S., additional, Ponraj, Sri B., additional, Maniruzzaman, Mohammad, additional, Ambujakshan, Arun T., additional, Chen, Zhiqiang, additional, Kviz, Ladge, additional, Lovett, Robert, additional, Rajmohan, Gayathri D., additional, de Celis, David R., additional, Wright, Marion L., additional, Lamb, Peter R., additional, Krasik, Yakov E., additional, Graves, David B., additional, Graham, William G., additional, d'Agostino, Riccardo, additional, and Wang, Xungai, additional

Published
2015
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31. An environmentally friendly in situ plasma and anodization method to produce titanium dioxide nanotubes.

Author

Ambujakshan, Arun T., Pringle, Jennifer M., Chen, Zhiqiang, Corr, Cormac S., du Plessis, Johan, Hodgson, Peter D., and Dai, Xiujuan J.

Subjects
TITANIUM dioxide, ANODIC oxidation of metals, NANOTUBES, HYDROGEN peroxide, AMORPHOUS substances, NITRATES
Abstract

An environmental friendly route to synthesize titanium dioxide nanotube powder is developed using a semi‐batch reactor set‐up that combines both anodization and the plasma treatment of water. A constant supply of the reactive plasma species, such as nitrate and hydrogen peroxide, in the semi‐batch reactor facilitates the formation of titanium dioxide nanotubes during the anodization of titanium. The results are compared against a conventional batch reactor set‐up that uses the same plasma‐treated water constantly during the anodization, which impacts the quality of the nanotubes produced. The semi‐batch reactor set‐up resulted in the formation of powders of titanium dioxide nanotubes with better physical and chemical qualities than those produced in the batch set‐up. [ABSTRACT FROM AUTHOR]

Published
2018
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32. Rapid Formation of Diamond-Like Nano-Carbons in a Gas Bubble Discharge in Liquid Ethanol.

Author

Chen, Zhiqiang, Magniez, Kevin, Duchemin, Marin, Stanford, Nikki, Ambujakshan, Arun T., Taylor, Adam, Wong, Cynthia S., Zhao, Yan, and Dai, Xiujuan J.

Subjects
ETHANOL, ATMOSPHERIC pressure, PLASMA-enhanced chemical vapor deposition
Abstract

This work demonstrates that diamond-like nano-carbons can be rapidly grown at atmospheric pressure and near ambient temperature in Ar gas bubble discharge in liquid ethanol. The method uses a discharge between point-to-plate electrodes immersed in ethanol, with plasma being generated inside Ar gas bubbles introduced through the needle electrode. The ethanol was dissociated at the liquid/gas interface into reactive species such as C and CH, which are the primary species responsible for diamond formation. A mixture of lonsdaleite nano-diamonds, amorphous carbon nano-spheres, and a graphitic carbon network, was formed. The rapid bubble movement distributes the reaction products almost immediately into the liquid phase, ensuring that nucleation of new material continues throughout the process. This simple, inexpensive and fast process avoids the elevated temperatures and extreme pressures of current methods. [ABSTRACT FROM AUTHOR]

Published
2018
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35. Back Cover: Plasma Process. Polym. 9∕2014

Author

Rubín de Celis, David, primary, Chen, Zhiqiang, additional, Rahman, Md Mohklesur, additional, Tao, Tao, additional, McCulloch, Dougal G., additional, Field, Matthew R., additional, Lamb, Peter R., additional, Chen, Ying, additional, and Dai, Xiujuan J., additional

Published
2014
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39. Study of radio frequency plasma treatment of PVDF film using Ar, O2 and Ar + O2 gases for improved polypyrrole adhesion

Author

Kaynak, Akif, Mehmood, Tariq, Dai, Xiujuan J., Magniez, Kevin, Kouzani, Abbas, Kaynak, Akif, Mehmood, Tariq, Dai, Xiujuan J., Magniez, Kevin, and Kouzani, Abbas

Abstract

Improvement of the binding of polypyrrole with PVDF (polyvinylidene fluoride) thin film using low pressure plasma was studied. The effects of various plasma gases i.e., Ar, O2 and Ar + O2 gases on surface roughness, surface chemistry and hydrophilicity were noted. The topographical change of the PVDF film was observed by means of scanning electron microscopy and chemical changes by X-ray photoelectron spectroscopy, with adhesion of polypyrrole (PPy) by abrasion tests and sheet resistance measurements. Results showed that the increase in roughness and surface functionalization by oxygen functional groups contributed to improved adhesion and Ar + O2 plasma gave better adhesion.

Published
2013

40. Improvement of polypyrrole coating adhesion by radio frequency plasma

Author

Kaynak Akif, Dai, Xiujuan J., Kouzani,Abbas, Mehmood, Tariq, Kaynak Akif, Dai, Xiujuan J., Kouzani,Abbas, and Mehmood, Tariq

Abstract

Tariq worked in the area of electronic textiles. He coated polyester fabric and PVDF films with polypyrrole. Plasma treatment was used to improve binding of coatings over the surface. He investigated in detail, the factors responsible for adhesion improvement using XPS, AFM, SEM, contact angle, abrasion tests and conductivity measurements. Different plasma gases, plasma power and plasma modes were investigated to get optimum bonding data. His investigations pointed towards improved surface oxygen functionalization and suitable surface morphology for improved bonding.

Published
2013

42. Recyclable Textiles Functionalized with Reduced Graphene Oxide@ZnO for Removal of Oil Spills and Dye Pollutants

Author

Wang, Jinfeng, Tsuzuki, Takuya, Tang, Bin, Sun, Lu, Dai, Xiujuan J., Rajmohan, Gayathri D., Li, Jingliang, Wang, Xungai, Wang, Jinfeng, Tsuzuki, Takuya, Tang, Bin, Sun, Lu, Dai, Xiujuan J., Rajmohan, Gayathri D., Li, Jingliang, and Wang, Xungai

Abstract

A novel recyclable and flexible membrane was prepared for the removal of oil spills and organic dye pollutants, by functionalizing polyester textiles with reduced graphene oxide@ZnO nanocomposites using a layer-by-layer technique. The membrane showed efficient water/oil separation, and the amount of oil adsorbed by the membrane could be up to 23 times its own weight. The adsorption capacity was largely retained during many adsorption recycling cycles. The membrane also displayed highly efficient removal of a dye pollutant from water under simulated sunlight. The membrane maintained a near-original removal efficiency after five cycles of dye removal. This new type of membrane may find practical applications in the large-scale separation of organic pollutants from water, particularly in the field of oil spills clean-up and dye removal from industrial effluent.

Published
2013

44. Ilmenite FeTiO 3 Nanoflowers and Their Pseudocapacitance

Author

Tao, Tao, Glushenkov, Alexey M, Liu, Hong-Wei, Liu, Zongwen, Dai, Xiujuan J., Chen, Hua, Ringer, Simon Peter, Chen, Ying, Tao, Tao, Glushenkov, Alexey M, Liu, Hong-Wei, Liu, Zongwen, Dai, Xiujuan J., Chen, Hua, Ringer, Simon Peter, and Chen, Ying

Abstract

Pronounced and stable pseudocapacitance has been found in flowerlike FeTiO3 nanostructures that were synthesized from ball-milled ilmenite (natural mineral) under mild hydrothermal conditions. Each nanoflower is composed of many thin petals with a thickness of 5-20 nm and a width of 100-200 nm. The formation of these flowerlike nanostructures is attributed to a dissolution-precipitation mechanism involving an intermediate sodium-containing phase. Electrochemical properties of the obtained FeTiO3 nanostructures are evaluated in aqueous electrolytes. The capacitance of 122 ± 14.5 F/g is measured in 1 M KOH aqueous electrolyte at the current rate of 500 mA/g, and 50 ± 6 F/g is retained at 5 A/g. The material has good long-term cycling stability. According to our data, FeTiO3 nanostructures show functionality as an electrode material for supercapacitors.

Published
2011

45. 3-D modeling of a carbon nanotube cantilever biosensor

Author

[Unknown], Islam, Md. Saiful, Kouzani, Abbas Z., Dai, Xiujuan J., Michalski, Wojtek P., [Unknown], Islam, Md. Saiful, Kouzani, Abbas Z., Dai, Xiujuan J., and Michalski, Wojtek P.

Abstract

In this paper, 3-D finite element modeling and simulations are carried out to investigate the bending deformation of a single-walled carbon nanotube cantilever biosensor due to mass attached, and addition of a nano-scale particles to the beam tip resulting from the bioparticle detection. In addition, an algorithm for an electrostaticmechanical coupled system is developed. The computed results are in excellent agreement with the well known electrostatic equations that govern the deformation.

Published
2010

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