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Vormspecifieke Synthese van ZnO Nanodeeltjes en hun gebruik ter vorming van Biodegradeerbare Nanocomposieten Universiteit Hasselt
De functionalisatie van biodegradeerbare polymere materialen is recent uitgegroeid tot een belangrijk onderzoeksdomein. Zo beperken enkele nadelige eigenschappen, zoals een lage warmtevervormingstemperatuur en hoge gaspermeabiliteit, momenteel nog hun algemeen gebruik. Een veelgebruikte strategie om bijvoorbeeld de gaspermeabiliteit van polymere verpakkingsmaterialen te verlagen, is het toevoegen van anorganische vullers, ter vorming van ...
Gebruik van de magnetohydrodynamische kracht in de dispersie van nanodeeltjes en katalysatorsynthese KU Leuven
Dit doctoraatswerk was een verkenning van de invloed van de combinatie van magnetische en hydrodynamische krachten op de eigenschappen van suspensies van nanopartikels.In de experimentele opstelling stroomde een suspensie van nanopartikels door een orthogonaal permanent magneetveld. Verschillende modelsuspensies werden onderzocht waaronder die van alumina en silica aggregaten, hard water, antimoonoxide en Mo-V-Sb mengoxides. Reproduceerbare ...
Suspensions and Gels Composed of Non-Spherical Nanoparticles: Rheology and Scattering (Suspensies en gels opgebouwd uit niet-sferische nanodeeltjes: Reologie en lichtverstrooiing) KU Leuven
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Singlet oxygen-based photoelectrocatalysis Universiteit Antwerpen
Singlet molecular oxygen (1O2) has continuously attracted researchers' interest because of its involvement in various processes, such as in photodynamic reactions in biological and chemical systems. 1O2 is an effective electrophile and potent oxidizing agent and can be easily generated by photosensitization via the illumination of organic dyes with visible light. As described in Chapter 1, 1O2 has gained prominence in various applications such ...
Optimized colloidal growth of hexagonal close-packed Ag microparticles and their stability under catalytic conditions KU Leuven
Crystal phase engineering of metal nano and microparticles is a new and promising route to tune their properties, complementary to their often exploited optimization via size and shape control. Ag microparticles have attracted much attention over the last decades due to their unique properties and their scalability. The colloidal synthesis of allotropic Ag microparticles has already been reported, but detailed knowledge of the synthesis and ...
Photoelectrochemical behavior of phthalocyanine-sensitized TiO₂ in the presence of electron-shuttling mediators Universiteit Antwerpen
Dye-sensitized TiO(2 )has found many applications for dye sensitized solar cells (DSSC), solar-to-chemical energy conversion, water/air purification systems, and (electro)chemical sensors. We report an electrochemical system for testing dye-sensitized materials that can be utilized in photoelectrochemical (PEC) sensors and energy conversion. Unlike related systems, the reported system does not require a direct electron transfer from ...
Atomic-level understanding for the enhanced generation of hydrogen peroxide by the introduction of an aryl amino group in polymeric carbon nitrides Universiteit Antwerpen
Heterogeneous catalysts are often & ldquo;black boxes & rdquo; due to the insufficient understanding of the detailed mechanisms at the catalytic sites. An atomic-level elucidation of the processes taking place in those regions is, thus, mandatory to produce robust and selective heterogeneous catalysts. We have improved the description of the whole reactive scenario for polymeric carbon nitrides (PCN) by combining atomic-level ...
Electrochemical and spectroelectrochemical studies of tert-butyl-substituted aluminum phthalocyanine Universiteit Antwerpen
Tetra-tert-butylphthalocyanine aluminum (III) chloride was studied by voltammetric and potential-resolved spectroelectrochemical methods in a non-coordinating solvent o-dichlorobenzene. Five redox transitions were found including two oxidation waves at 0.18 and 0.90 V and three reduction waves at −1.28, −1.65, and −2.63 V vs. Fc+/Fc. Electrochemical reversibility of the first oxidation and reduction processes was assessed by using the diagnostic ...
Surface plasmon resonance-induced visible light photocatalytic TiO₂ modified with AuNPs for the quantification of hydroquinone Universiteit Antwerpen
The impregnation of size-controlled gold nanoparticles (AuNPs) on an anatase TiO2 structure (AuNPs@TiO2) was studied for the photoelectrochemical detection of hydroquinone (HQ) under visible light illumination integrated into a flow injection analysis (FIA) setup. The crystalline form of TiO2 was preserved during synthesis and the homogeneous distribution of AuNPs over the TiO2 structure was confirmed. Its photoelectrocatalytic activity was ...