BaTiO3 nanocubes-Gelatin composites for piezoelectric harvesting: Modeling and experimental study

Ciomaga, Cristina Elena; Horchidan, Nadejda; Padurariu, Leontin; Stirbu, Radu Stefan; Tiron, Vasile; Tufescu, Florin Mihai; Topală, Ionuț; Condurache, Oana; Botea, Mihaela; Pintilie, I.; Pintilie, L.; Rotaru, Aurelian; Caruntu, Gabriel; Mitoşeriu, Liliana

doi:10.1016/j.ceramint.2022.05.264

Cited by 11 publications

(5 citation statements)

References 74 publications

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“…The typical SEM image of the as-synthesized AFC exhibits a three-dimensional framework structure (figure 1 111), (11-2), (20-2), (112), (020), ( 202), , (022), (31-1) and (220) planes, respectively, consistent with the previous report [32]. The peaks of BTO located at 21.9°, 31.4°, 38.6°, 44.9°, 50.6°, 55.9°and 65.8°are respectively indexed to (100), (110), (111), ( 200), ( 210), ( 211) and (220) facets, respectively, following the prior work [33]. The diffraction peaks of both CuO and BTO appear in the XRD pattern of CuO-BTO/AFC composite and the peak at 21.9°indexed to the (100) plane of BTO overlaps with the diffraction peak of the AFC substrate.…”

Section: Resultssupporting

confidence: 89%

Efficient degradation of organics by ultrasonic piezoelectric effect on CuO-BTO/AFC composite

Feng,

Zhang,

Deng

et al. 2024

Nanotechnology

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The recombination of photoexcited electron-hole pairs greatly limits the degradation performance of photocatalysts. Ultrasonic cavitation and internal electric field induced by the piezoelectric effect are helpful for the separation of electron-hole pairs and degradation efficiency. The activated foam carbon (AFC) owing to its high surface area is often used as the substrate to grow catalysts to provide more reactive active sites. In this work, CuO@BaTiO3 (CuO@BTO) heterostructure is prepared by hydrothermal method on the surface of AFC to investigate the ultrasonic piezoelectric catalysis effect. X-ray diffraction (XRD), Raman spectroscopy, energy dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) were used to analyze the structure and morphology of CuO-BTO/AFC composite. It is found that the CuO-BTO/AFC composite exhibits excellent piezo-catalytic performance for the degradation of organics promoted by ultrasonic vibration. The CuO-BTO/AFC composite can decompose methyl orange and methylene blue with degradation efficiency as high as 93.9% and 97.6% within 25 minutes, respectively. The mechanism of piezoelectricity enhanced ultrasound supported catalysis effect of system CuO-BTO/AFC is discussed. The formed heterojunction structure between BTO and CuO promotes the separation of positive and negative charges caused by the piezoelectric effect.

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Section: Resultssupporting

confidence: 89%

Efficient degradation of organics by ultrasonic piezoelectric effect on CuO-BTO/AFC composite

Feng,

Zhang,

Deng

et al. 2024

Nanotechnology

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“…BaTiO 3 -gelatin nanocomposite thick films investigated within this work have been prepared by a solution method as described in detail in Ref. [ 13 ]. Briefly, the BaTiO 3 cubic nanoparticles, weighted in different amounts, were mixed in acetone by using a sonification bath.…”

Section: Methodsmentioning

confidence: 99%

GHz—THz Dielectric Properties of Flexible Matrix-Embedded BTO Nanoparticles

et al. 2023

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BaTiO3 (BTO) nanoparticles produced by wet chemistry methods were embedded in several types of flexible materials in order to fabricate flexible electronic devices. Starting from the produced nanoparticle dielectric properties, flexible material dielectric properties were tested for high electromagnetic frequencies (30 GHz–2 THz) using time domain spectroscopy. Dielectric performances of the different materials obtained with variable nanoparticle concentrations up to 40% wt, embedded in, gelatin, epoxy, and styrene-butadiene were compared at several working temperatures between 0 °C and 120 °C. Beside the general trend of ε’ decrease with temperature and loses increase with the operating frequency, we were able to identify few matrix dependent optimal nanoparticle concentrations. The best composite performances were achieved by the BTO-SBS matrix, with filler concentration of 2% wt., where the losses have been of 1.5%, followed by BTO-gelatin matrix, with filler concentration of 40% wt, with higher losses percent of almost 10% for THz frequencies.

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“…Cristina Ciomaga from Al.I. Cuza University in Romania described a method for making porous Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 by burning poly(methyl methacrylate) (PMMA) particles as the pore-forming agent and then provided theoretical calculations concluding that highly specific and anisotropic porosity distribution may define equally specific strain-stress distributions, leading to superior piezoelectric and pyroelectric figures of merit [122]. Vlad Lukacs from the same institution observed that most studies on BaTiO 3 ceramics were performed for critical grain sizes of around 1 µm, where superior properties have been found, and went on to run a study trying to determine how electrochemical properties vary depending on the grain size [123].…”

Section: Poster Presentationsmentioning

confidence: 99%