| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mohammadi, Mohammadreza
University of Dundee
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (48/48 displayed)
- 2020A calibrated oat lodging model compared with agronomic measurementscitations
- 2019Performance of CoTiO3 as an oxide perovskite material for the light scattering layer of dye-sensitized solar cellscitations
- 2018Novel microwave-assisted synthesis of porous g-C3N4/SnO2 nanocomposite for solar water-splittingcitations
- 2017TiO2–BaTiO3 nanocomposite for electron capture in dye-sensitized solar cellscitations
- 2017In-situ solvothermal processing of polycaprolactone/hydroxyapatite nanocomposites with enhanced mechanical and biological performance for bone tissue engineeringcitations
- 2017On the assessment of photocatalytic activity and charge carrier mechanism of TiO2@SnO2 core-shell nanoparticles for water decontaminationcitations
- 2016Plasmonic Effects of Infiltrated Silver Nanoparticles Inside TiO2 Filmcitations
- 2016Soluble tetratriphenylamine Zn phthalocyanine as Hole Transporting Material for Perovskite Solar Cellscitations
- 2016Impact of preparation method of TiO2-RGO nanocomposite photoanodes on the performance of dye-sensitized solar cellscitations
- 2016Effects of alumina nanoparticles concentration on microstructure and corrosion behavior of coatings formed on titanium substrate via PEO processcitations
- 2014Sensor Performance of Nanostructured TiO2-SnO2 Films Prepared by an Aqueous Sol-Gel Processcitations
- 2014Semiconductor TiO2-Al2O3 thin film gas sensors derived from aqueous particulate sol-gel processcitations
- 2014Development of sol-gel-derived multi-wall carbon nanotube/hydroxyapatite nanocomposite powders for bone substitutioncitations
- 2014Study plasma electrolytic oxidation process and characterization of coatings formed in an alumina nanoparticle suspensioncitations
- 2014Sensor performance of nanostructured TiO2-Cr2O3 thin films derived by a particulate Sol-Gel route with various Cr:Ti molar ratioscitations
- 2013Experiments design for hardness optimization of the ni-cr alloy electrodeposited by pulse platingcitations
- 2013Preparation and characterization of multi-walled carbon nanotube/hydroxyapatite nanocomposite film dip coated on Ti-6Al-4V by sol-gel method for biomedical applications:An in vitro studycitations
- 2013Synthesis of highly pure nanocrystalline and mesoporous CaTiO3 by a particulate sol-gel route at the low temperaturecitations
- 2013Preparation and characterization of multi-walled carbon nanotube/hydroxyapatite nanocomposite film dip coated on Ti-6Al-4V by sol-gel method for biomedical applicationscitations
- 2013Development of nanostructured porous TiO2 thick film with uniform spherical particles by a new polymeric gel process for dye-sensitized solar cell applicationscitations
- 2013Improved electron transportation of dye-sensitized solar cells using uniform mixed CNTs-TiO2 photoanode prepared by a new polymeric gel processcitations
- 2013In vitro study of hydroxyapatite/polycaprolactone (HA/PCL) nanocomposite synthesized by an in situ sol-gel processcitations
- 2012Low temperature nanocrystalline TiO 2-Fe 2O 3 mixed oxide by a particulate sol-gel routecitations
- 2012Tailoring of morphology and crystal structure of nanomaterials in MgO-TiO 2 system by controlling Mg:Ti molar ratiocitations
- 2012Development of hydroxyapatite nanorods-polycaprolactone composites and scaffolds derived from a novel in-situ sol-gel processcitations
- 2011Template-based growth of titanium dioxide nanorods by a particulate sol-electrophoretic deposition processcitations
- 2011Synthesis and characterisation of nanosized TiO2-ZrO2 binary system prepared by an aqueous sol-gel processcitations
- 2011Preparation and characterization of nanocrystalline and mesoporous strontium titanate thin films at room temperaturecitations
- 2011One-dimensional cadmium sulfide (CdS) nanostructures by the solvothermal processcitations
- 2011Wear and corrosion properties of electroless nickel composite coatings with PTFE and/or MoS2 particlescitations
- 2011Synthesis of nanostructured and nanoporous TiO2-AgO mixed oxide derived from a particulate sol-gel routecitations
- 2011Sol-gel derived nanocrystalline and mesoporous barium strontium titanate prepared at room temperaturecitations
- 2010Synthesis and characterisation of nanostructured neodymium titanium oxides by sol-gel processcitations
- 2010Low temperature nanostructured zinc titanate by an aqueous particulate sol-gel routecitations
- 2010Mesoporous and nanocrystalline sol-gel derived NiTiO3 at the low temperaturecitations
- 2010Low temperature nanostructured lithium titanatescitations
- 2010Nanostructured TiO2-CeO2 mixed oxides by an aqueous sol-gel processcitations
- 2009Low-temperature perovskite-type cadmium titanate thin films derived from a simple particulate sol-gel processcitations
- 2009Development of nanocrystalline TiO2-Er2O3 and TiO2-Ta2O5 thin film gas sensorscitations
- 2009Water-based sol-gel nanocrystalline barium titanatecitations
- 2008Sol-gel nanostructured titanium dioxidecitations
- 2008Influence of secondary oxide phases on microstructural and gas sensitive properties of nanostructured titanium dioxide thin films
- 2008Comparison of single and binary oxide sol-gel gas sensors based on titaniacitations
- 2007Preparation and characterisation of nanostructural TiO2-Ga 2O3 binary oxides with high surface area derived form particulate sol-gel routecitations
- 2007A simple particulate sol-gel route to synthesize nanostructural TiO2-Ta2O5 binary oxides and their characteristicscitations
- 2007Semiconductor TiO2-Ga2O3 thin film gas sensors derived from particulate sol-gel routecitations
- 2006Preparation of high surface area titania (TiO2) films and powders using particulate sol-gel route aided by polymeric fugitive agentscitations
- 2006Preparation and characterisation of nanostructural TiO2-Er 2O3 binary oxides with high surface area derived from particulate sol-gel routecitations
Places of action
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article
Semiconductor TiO2-Ga2O3 thin film gas sensors derived from particulate sol-gel route
Abstract
<p>Nanostructured and mesoporous TiO<sub>2</sub>-Ga<sub>2</sub>O<sub>3</sub> thin films with various Ti:Ga atomic ratios were prepared by a new straightforward particulate sol-gel route. Titanium isopropoxide and gallium (III) nitrate hydrate were used as precursors, and hydroxypropyl cellulose (HPC) was used as a polymeric fugitive agent (PFA) in order to increase the specific surface area (SSA). XRD and TEM analysis of the powders revealed that the Ga<sub>2</sub>O<sub>3</sub> formed from the nitrate precursor retarded anatase-to-rutile transformation, crystallization and crystal growth. The average crystallite size of pure TiO<sub>2</sub> powder annealed at 600-1000 °C were in the range 4-10 nm; the values that could be decreased to 2-6 nm for TiO<sub>2</sub>-Ga<sub>2</sub>O<sub>3</sub> powders. Furthermore, one of the highest SSA was obtained by introducing Ga<sub>2</sub>O<sub>3</sub> into TiO<sub>2</sub>, being 305 m<sup>2</sup> g<sup>-1</sup> for TG11 (Ti:Ga = 50:50 atomic ratio) binary oxide annealed at 600 °C. Thin films produced under optimized conditions showed excellent microstructural properties for gas sensing applications. They exhibited a remarkable response towards low concentrations of CO and NO<sub>2</sub> gases at low operating temperature of 200 °C, resulting in increased thermal stability of sensing films as well as a decrease in their power consumption. TG11 sensor showed the highest response towards all CO and NO<sub>2</sub> concentrations operated at 200 °C. The response magnitude of 13.7 and 4.3 with response times of 30 s and 108 s were achieved for TG11 sensor towards 400 ppm CO and 10 ppm NO<sub>2</sub>, respectively. Furthermore, calibration curves revealed that TiO<sub>2</sub>-Ga<sub>2</sub>O<sub>3</sub> sensors follow the power law (S = A[gas]<sup>B</sup>) (where S is sensor response, coefficients A and B are constants and [gas] is gas concentration) for the two types of gases, and they have excellent capability for the detection of low gas concentrations (25 ppm CO and 0.5 ppm NO<sub>2</sub>). The maximum response of TiO<sub>2</sub>-Ga<sub>2</sub>O<sub>3</sub> sensors towards CO and NO<sub>2</sub> was measured at 450 and 400 °C, respectively. The sensor response decreased with increasing film annealing temperature owing to sintering of the particles. The response magnitude and response time of the sensors obtained in this work is superior to TiO<sub>2</sub>-based sensors reported in previous studies.</p>