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Hang, N.K.; Nurul Akmal Jaafar; Lorna Jeffery Minggu; Mohammad bin Kassim; Mohammad bin Kassim, E-mail: lorna_jm@ukm.edu.my2016
AbstractAbstract
[en] Different compositions of Fe-doped tungsten trioxide thin films were synthesized on fluorine-doped tin oxide (FTO) glass substrate by sol-gel method, with ferrocene and tungstic acid as starting materials. The synthesized thin films was characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), UV/Vis spectrophotometer and photoelectrochemical (PEC) analysis. The results show that the surface morphology of the thin films became rough and the grain size increased along with the concentration of Fe. Monoclinic structure of tungsten trioxide was obtained for all doped and undoped WO3 and red-shift can be observed from UV-vis spectrum. Band gap reduced from 2.74 eV of undoped WO3 thin films to 2.60 eV of 20 % Fe-doped WO3 thin films. Photoactivities of all Fe-doped WO3 are higher than undoped thin films. The highest photoactivities contributed by 5 % Fe-doped WO3 films with photocurrent densities measured was 0.148 mA/ cm2, which is 3 times higher compared to undoped WO3. (author)
Primary Subject
Source
Available in abstract and full-text from http://www.ukm.my/mjas/mjas2017/; Official journal of The Malaysian Analytical Sciences Society (ANALIS)
Record Type
Journal Article
Journal
Malaysian Journal of Analytical Sciences; ISSN 1394-2506;
; v. 20(4); p. 923-930

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Photoelectrochemical sensors were developed for the rapid detection of oxidative DNA damage induced by titanium dioxide and polystyrene nanoparticles. Each sensor is a multilayer film prepared on a tin oxide nanoparticle electrode using layer- by-layer self assembly and is composed of separate layer of a photoelectrochemical indicator, DNA. The organic compound and heavy metals represent genotoxic chemicals leading two major damaging mechanisms, DNA adduct formation and DNA oxidation. The DNA damage is detected by monitoring the change of photocurrent of the indicator. In one sensor configuration, a DNA intercalator, Ru(bpy)2 (dppz)2+ [bpy=2, 2' -bipyridine, dppz=dipyrido (3, 2-a: 2' 3'-c) phenazine], was employed as the photoelectrochemical indicator. The damaged DNA on the sensor bound lesser Ru(bpy)2 (dppz)2+ than the intact DNA, resulting in a drop in photocurrent. In another configuration, ruthenium tris(bipyridine) was used as the indicator and was immobilized on the electrode underneath the DNA layer. After oxidative damage, the DNA bases became more accessible to photoelectrochemical oxidation than the intact DNA, producing a rise in photocurrent. Both sensors displayed substantial photocurrent change after incubation in titanium dioxide / polystyrene solution in a time . dependent manner. According to the data, damage of the DNA film was completed in 1h in titanium dioxide / polystyrene solution. In addition, the titanium dioxide induced much more sever damage than polystyrene. The results were verified independently by gel electrophoresis and UV-Vis absorbance experiments. The photoelectrochemical reaction can be employed as a new and inexpensive screening tool for the rapid assessment of the genotoxicity of existing and new chemicals. (author)
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Secondary Subject
Record Type
Journal Article
Journal
Pakistan Journal of Analytical and Environmental Chemistry; ISSN 1996-918X;
; v. 11(1); p. 8-15

Country of publication
CHALCOGENIDES, CURRENTS, ELECTRIC CURRENTS, ELECTROCHEMICAL CELLS, MATERIALS, NUCLEIC ACIDS, ORGANIC COMPOUNDS, ORGANIC POLYMERS, OXIDES, OXYGEN COMPOUNDS, PETROCHEMICALS, PETROLEUM PRODUCTS, PLASTICS, POLYMERS, POLYOLEFINS, POLYVINYLS, SYNTHETIC MATERIALS, TITANIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The Gratzel photoelectrochemical cell is a relatively new device that has the advantage of being significantly cheaper to produce than a bulk silicon solar cell. This paper examines sputtered titanium dioxide Gratzel devices specifically to discuss the practical implementation of such a device. In addition to the sputtered titanium dioxide coating, an electrical model is presented to aid in the design of components for a complete photovoltaic power system. The Gratzel cell exhibits a significant capacitance that can cause misleading measurements when tested on conventional equipment. The capacitance and the reverse bias conditions are presented as an electrical model for use in circuit simulators such as SPICE or MCROCAP. Copyright (2001) The Australian Ceramic Society
Primary Subject
Source
13 refs., 2 tabs., 8 figs.
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Journal of the Australasian Ceramic Society; ISSN 1018-6689;
; v. 37(1); p. 27-34

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Iwu, Kingsley O.; Galeckas, Augustinas; Kuznetsov, Andrej Yu.; Norby, Truls, E-mail: k.o.iwu@smn.uio.no, E-mail: augustinas.galeckas@fys.uio.no, E-mail: andrej.kuznetsov@fys.uio.no, E-mail: truls.norby@kjemi.uio.no2013
AbstractAbstract
[en] Photocurrent and H2 production were demonstrated in an all solid-state photoelectrochemical cell employing gaseous methanol and water vapour at the photoanode. Open circuit photovoltage of around −0.4 V and short circuit photocurrent of up to 250 μA/cm2 were obtained. At positive bias, photocurrent generation was limited by the irradiance, i.e., the amount of photogenerated charge carriers at the anode. Time constants and impedance spectra showed an electrochemical capacitance of the cell of about 15 μF/cm2 in the dark, which increased with increasing irradiance. With only water vapour at the anode, the short circuit photocurrent was about 6% of the value with gaseous methanol and water vapour. The photoanode and electrocatalyst on carbon paper support were affixed to the proton conducting membrane using Nafion® as adhesive, an approach that yielded photocurrents up to 15 times better than that of a cell assembled by hot-pressing, in spite of the overall cell resistance of the latter being up to five times less than that of the former. This is attributed, at least partially, to reactants being more readily available at the photoanode of the better performing cell
Primary Subject
Source
S0013-4686(13)00410-6; Available from http://dx.doi.org/10.1016/j.electacta.2013.03.013; Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The claim is often made that efficiency is a key factor in determining the marketability of photovoltaic products. If this is the case, a strong correlation between the price of modules and their efficiency might be expected. This relationship is investigated using module pricing data that have recently become available. Conclusions are that there is little correlation between module price and efficiency in this data set and that some thin-film modules currently appear to attract a pricing premium. (Author)
Primary Subject
Record Type
Journal Article
Journal
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Sakai, Osamu; Ueda, Yoshihiko; Akiyama, Tomohide; Nakata, Josuke, E-mail: sakai.osamu.3x@kyoto-u.ac.jp2013
AbstractAbstract
[en] Underwater spherical photoelectrochemical cells aligned in three-dimensional electrolyte space convert injected sunlight into driving force for water splitting, which is analysed by a model calculation and verified in experiments. Sunlight is well absorbed via a number of bounces on Si, and trajectories of its rays are in a fractal-like scale-free system. Similar systems are applicable to general photoelectrochemical cells. (fast track communication)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0022-3727/46/18/182001; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Khuzaimah Arifin; Hasmida Abdul Kadir; Hasmida Abdul Kadir; Lorna Jeffery Minggu; Wan Ramli Wan Daud; Mohammad B Kassim; Wan Ramli Wan Daud, E-mail: khuzaim@ukm.edu.my2016
AbstractAbstract
[en] Various modifications of the titanium dioxide thin films have been done in fulfilling the photoelectrode requirements for photoelectrochemical water splitting reaction. In this study, surface passivation of TiO2 by hematite-Fe2O3 was reported. Electrodeposition technique was used to deposit the Fe2O3 onto the TiO2/ FTO film with variation of time. X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and UV-Vis spectroscopic analyses were used to characterize the electrode. Plane-wave-based pseudopotential density functional theory (DFT) calculations were used to analyze the electronic structure and charge potential at the surface of the electrode. The photocurrent measurement showed that current density of TiO2/ Fe2O3 electrode was higher than the TiO2/ FTO under the same illumination intensity of 100 mWcm-2. The highest current density was produced by 5 minutes electrodeposition of Fe2O3, which also shifted the absorption to visible region at the threshold wavelength of 518 nm. (author)
Primary Subject
Source
Available in abstract and full-text from http://www.ukm.my/mjas/mjas2017/; Official journal of The Malaysian Analytical Sciences Society (ANALIS)
Record Type
Journal Article
Journal
Malaysian Journal of Analytical Sciences; ISSN 1394-2506;
; v. 20(4); p. 892-900

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Tiuleanu, I.; Simaschevici, A.; Cojocaru, A.
Institut of Applied Physics of Academy od Sciences of Moldova (Moldova, Republic of)2002
Institut of Applied Physics of Academy od Sciences of Moldova (Moldova, Republic of)2002
AbstractAbstract
[en] The invention refers to the field of solar-to electric energy conservation and may be used for the creation of photoelectrochemical regenerating converters. Summary of the invention consists in that the photoelectrochemical solar battery includes a semiconducting photo-electrodes and a counter-electrode , placed into the electrolyte solution. The photo-electrode is made of the compounds A3B5, and in the capacity of electrolyte solution is used an aqueoua solution Na2SiO3. The result of the invention consists in the absorbtion from the electrtolyte solution of the ions SiO3 and HSiO3 on the photo-electrode working surface, that leads to a decrease in the corrosion of the latter
Original Title
Celula solara fotoelectrochimica
Primary Subject
Source
The Official Bulletin of Industrial Property (INFOINVENT); (no.3/2002); 30 Mar 2002; 5 Sep 2001; [p. 24]; MD PATENT DOCUMENT 1888/13/F2; MD PATENT APPLICATION A2001/0286; Available from The State Agency for Industrial Property, Chisinau (MD); Application date: 5 Sep 2001
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Shen, Ze Xiang; Xia, Juau; Yan, Jiaxu, E-mail: zexiang@ntu.edu.sg
Proceedings of the first international conference on advances in nanomaterials and devices for energy and environment: abstract proceeding2019
Proceedings of the first international conference on advances in nanomaterials and devices for energy and environment: abstract proceeding2019
AbstractAbstract
[en] It is well known that the optical and electronic structures of two-dimensional (2D) materials often show very strong layer-dependent properties. The properties can also be tuned by stacking configuration, which allows us to build electro and optical devices with the same material and the same thickness. Detailed understanding of the inter-layer interaction will help greatly in tailoring the properties of 2D materials for applications, e.g. in pn junction, transistors, solar cells and LEDs. Raman/Photoluminescence (PL) spectroscopy and imaging have been extensively used in the study of nano-materials and nano-devices. They provide critical information for the characterization of the materials such as electronic structure, optical property, phonon structure, defects, doping and stacking sequence. In this talk, we use Raman and PL techniques and electric measurements, as well as simulation to study 2- and 3-layer 2D samples. The Raman and PL spectra also show clear correlation with layer-thickness and stacking sequence. Electrical experiments and ab-initio calculations reveal that difference in the electronic structures mainly arises from competition between spin-orbit coupling and interlayer coupling in different structural configurations
Primary Subject
Source
Srivastava, Anurag (ed.) (Advanced Materials Research Group, Indian Institute of Information Technology and Management, Gwalior (India)); Advanced Materials Research Group, Indian Institute of Information Technology and Management, Gwalior (India); [179 p.]; 2019; [1 p.]; ICAN-2019: international conference on advances in nanomaterials and devices for energy and environment; Gwalior (India); 27-29 Jan 2019; Article ID PT-07
Record Type
Book
Literature Type
Conference
Country of publication
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Yoo, Seung Hwa; Kum, Jong Min; Heo, Sung Hwan; Cho, Sung Oh
Proceedings of the KNS spring meeting2009
Proceedings of the KNS spring meeting2009
AbstractAbstract
[en] Photoelectrochemical(PEC) cell is a devise to convert photon energy to electrical or chemical energy using a semiconductor material as a photo-anode. Titania has been widely used for this application as a semiconductor material, even though it has a wide band-gap which is inappropriate for conversion of photo energy to electrical energy due to the poor absorption of visible light. Recently, dye sensitization became a good solution to increase the absorption of visible light. However, this approach includes several processes in fabrication which can be time consuming and inappropriate for commercialization. In this study, electron beam was irradiated to a silica and titania based hybrid polymer to form a semiconductor material which has a good visible light absorption property. This approach may be a very simple method to fabricate a photo-anode
Primary Subject
Source
Korean Nuclear Society, Daejeon (Korea, Republic of); [1 CD-ROM]; May 2009; [2 p.]; 2009 spring meeting of the KNS; Jeju (Korea, Republic of); 18-23 May 2009; Available from KNS, Daejeon (KR); 4 refs, 3 figs
Record Type
Miscellaneous
Literature Type
Conference
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