Mr. Abdulaziz Alharbi Profile

Abdulaziz Alharbi

at 6007 E Ironhorse Cir

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Publications (5)

Proceedings Article | 12 April 2016 Paper

Effects of edge grinding and sealing on mechanical properties of machine damaged laminate composites

Ramazan Asmatulu, Jason Yeoh, Ibrahim Alarifi, Abdulaziz Alharbi

Proceedings Volume 9804, 98042G (2016) https://doi.org/10.1117/12.2235477

KEYWORDS: Wind turbine technology, Composites, Diamond machining, Diamond, Carbon, Wind energy, Manufacturing, Abrasives, Adhesives, Epoxies, Polymers, Aerospace engineering

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Proceedings Article | 1 April 2016 Presentation + Paper

Comparative studies on different nanofiber photocatalysts for water splitting

Abdulaziz Alharbi, Ibrahim Alarifi, Waseem Khan, Ramazan Asmatulu

Proceedings Volume 9806, 980611 (2016) https://doi.org/10.1117/12.2235540

KEYWORDS: Water splitting, Nanofibers, Strontium, Nanoparticles, Nickel, Titanium, Crystals, Oxides, Ultraviolet radiation, Scanning electron microscopy, Polymers, Graphene

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Water splitting using photocatalyst has become a topic of recent investigation since it has the potential of producing hydrogen for clean energy from sunlight. An extensive number of solid photocatalysts have been studied for overall water splitting in recent years. In this study, two methods were employed to synthesize two different photocatalysts for water splitting. The first method describes the synthesis of nickel oxide-loaded strontium titanate (NiO-SrTiO₃) particles on electrospun polyacrylonitrile (PAN) nanofibers incorporated with graphene nanoplatelets for water splitting. The electrospun PAN fibers were first oxidized at 270°C for two hours and subsequently immersed in a solution containing ethanol, titanium (IV)-isopropoxide [C₁₂H₂₈O₄Ti] and strontium nitrate [Sr(NO₃)₂]. This solution was then treated with NiO nanoparticles dispersed in toluene. The surface treated PAN fibers were annealed at 600°C in air for 1 hour to transform fibers into a crystalline form for improved photocatalyst performance. In the second method, coaxial electrospinning process was used to produce core/shell strontium titanate/nickel oxide (SrTiO₃-NiO) nanofibers. In coaxial method, poly (vinyl pyrrolidone) (PVP) was dissolved in deionized (DI) water, and then titanium (IV) isopropoxide [C₁₂H₂₈O₄Ti] and strontium nitrate [Sr(NO₃)₂] were added into the solution to form the inner (core) layer. For outer (shell) solution, polyacrylonitrile (PAN) polymer was dissolved in dimethylformamide (DMF) at a weight ratio of 10:90 and then nickel oxide was mixed with the solution. Ultraviolet (UV) spectrophotometry and static contact angle measurement techniques were employed to characterize the structural properties of photocatalysts produced by both methods and a comparison was made between the two photocatalysts. The morphology and diameter of the nanofibers were observed by scanning electron microscopy (SEM). The structure and crystallinity of the calcined nanofibers were also observed by means of X-ray diffraction (XRD).

Proceedings Article | 1 April 2015 Paper

Electrospun carbon nanofibers for improved electrical conductivity of fiber reinforced composites

Ibrahim Alarifi, Abdulaziz Alharbi, Waseem Khan, Ramazan Asmatulu

Proceedings Volume 9430, 943032 (2015) https://doi.org/10.1117/12.2179706

KEYWORDS: Composites, Nanofibers, Carbon, Structural health monitoring, Resistance, Scanning electron microscopy, Polymers, Argon, Structured optical fibers, Wind turbine technology

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Proceedings Article | 27 March 2015 Paper

Electrospun TiO2 nanofibers incorporated with graphene nanoflakes for energy conversion

Manish Shinde, Ibrahim Alarifi, Abdulaziz Alharbi, Ramazan Asmatulu

Proceedings Volume 9439, 94390Z (2015) https://doi.org/10.1117/12.2087206

KEYWORDS: Nanofibers, Graphene, Heat treatments, Dye sensitized solar cells, Solar energy, Scanning electron microscopy, Solar cells, Transmission electron microscopy, Visible radiation, Titanium dioxide

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Proceedings Article | 27 March 2015 Paper

Electrospun strontium titanata nanofibers incorporated with nickel oxide nanoparticles for improved photocatalytic activities

Abdulaziz Alharbi, Ibrahim Alarifi, Waseem Khan, Ramazan Asmatulu

Proceedings Volume 9439, 94390F (2015) https://doi.org/10.1117/12.2180357

KEYWORDS: Nanofibers, Polymers, Oxides, Strontium, Nickel, Scanning electron microscopy, Water splitting, Nanoparticles, Semiconductors, Wind energy

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