Microwave-assisted synthesis of TiO2 and Ga-doped TiO2 nanoparticles for their application in dye-sensitized solar cells

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dc.audiencegeneralPublic
dc.contributorPal, Umapada
dc.contributorVillanueva Cab, Julio
dc.contributor.advisorPal, Umapada ; 0000-0002-5665-106X
dc.contributor.advisorVillanueva Cab, Julio; 0000-0002-6261-9197
dc.contributor.authorArriola Oliva, José Francisco Emmerson
dc.creatorArriola Oliva, José Francisco Emmerson; 0009-0001-8414-927X
dc.date.accessioned2026-03-10T20:03:08Z
dc.date.available2026-03-10T20:03:08Z
dc.date.issued2025-09
dc.description.abstract"Titanium dioxide (TiO2) is a versatile semiconductor with significant potential for applications in photocatalysis, pigments and paints, electronics, and solar cells. This study explores the synthesis and characterization of TiO2 nanoparticles (NPs) and gallium (Ga)- doped TiO2 NPs with varying Ga concentrations (0, 4, 8, and 16 mol%). The synthesis was carried out using microwave irradiation. The primary titanium precursor was titanium (IV) tetraisopropoxide (Ti [OCH(CH3)2]4; TTIP), while the Ga dopant source employed was hydrated gallium nitrate (GaNO3)3∙XH2O. Nitric acid (HNO3) was added to prevent the premature hydrolysis of TTIP. The synthesized powders were washed and dried, and subsequently used to fabricate mesoporous thin films via the doctor-blade technique. The synthesized undoped and Ga-doped TiO2 materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, Scanning Electron Microscopy (SEM), Diffuse Reflectance Spectroscopy (DRS), Brunauer-Emmett-Teller (BET) theory, and Zeta potential, respectively. Analysis by XRD and Raman spectroscopy confirmed the formation of TiO2 anatase. As the Ga content increased, a clear trend was observed in the SEM images, where the average particle size decreased significantly, and the specific surface area increased in the same trend, indicating a direct correlation between these two analyses. Additionally, Zeta potential measurements revealed that Ga doping resulted in a more negative surface charge. Furthermore, current density -voltage (J-V) curves of the fabricated dye-sensitized solar cells (DSSCs) based on the synthesized powders were recorded under standard illumination conditions to assess their photovoltaic performance".
dc.folio20251006093547-2182-T
dc.formatpdf
dc.identificator7
dc.identifier.urihttps://hdl.handle.net/20.500.12371/31730
dc.language.isospa
dc.matricula.creator223470235
dc.publisherBenemérita Universidad Autónoma de Puebla
dc.rights.accesopenAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subject.classificationINGENIERÍA Y TECNOLOGÍA
dc.subject.lccIngeniería (General)--Materiales de ingeniería y construcción--Materiales de composición o estructura especial--Materiales nanoestructurados
dc.subject.lccNanopartículas metálicas--Síntesis
dc.subject.lccPelículas delgadas--Materiales
dc.subject.lccPeliculas delgadas--Propiedades opticas--Evaluación
dc.thesis.careerMaestría en Ciencias en Energías Renovables
dc.thesis.degreedisciplineÁrea de Ingeniería y Ciencias Exactas
dc.thesis.degreegrantorInstituto de Ciencias
dc.thesis.degreetoobtainMaestro (a) en Ciencias en Energías Renovables
dc.titleMicrowave-assisted synthesis of TiO2 and Ga-doped TiO2 nanoparticles for their application in dye-sensitized solar cells
dc.typeTesis de maestría
dc.type.conacytmasterThesis
dc.type.degreeMaestría
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