Fundamentals of Solid State Engineering

Synergistic photocatalysis is reported, using the optimal amounts of oxygen vacancies of high‐k materials and nanoarchitecture maneuvering by employing a combinatorial sputtering approach. The highlights include (i) the successful fabrication of samples using combinatorial sputtering; (ii) a systematic investigation of the coupling effect between Y2O3−x and TiO2−x; (iii) elucidating charge carrier transport through current‐voltage (I‐V) and capacitance‐voltage (C‐V) characterizations; and (iv) providing an alternative application for high‐dielectric constant (high‐k) materials in photocatalysis. The simple yet effective composition spread technique rapidly determined that Sample 6 (4 at% Y2O3−x‐96 at% TiO2−x, TiO2−x‐rich on the Y2O3−x–TiO2−x nanorod composite composition spread) exhibited the highest photocatalytic efficiency (i.e., approximately 3.4 times and 1.4 times higher than that of P25 and pure TiO2−x nanorods, respectively). The predominant factor was determined to be electron migration along defective Y2O3−x nanorods to the sample surface. The extracted mobility was discovered to be an order of magnitude greater than that of pure TiO2−x. The photoelectrochemical stability and reusability were also demonstrated.

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“…49,60,61 The e of the sample was also deduced from the C-V curve. 49,60,61 The e of the sample was also deduced from the C-V curve.…”

Section: Resultsmentioning

confidence: 99%

Defective Y₂O_3−x–driven anomalous photocatalytic enhancement using Y₂O_3−x–TiO_2−x nanorod composite composition spreads

2017

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“…Como o movimento do elétron no plano yz é similar ao de uma partícula livre, Ψ(y,z) pode ser considerada uma onda plana e tanto k y quanto k z podem assumir valores contínuos. Os níveis de energia ficam, então [27]:…”

Section: Poços Quânticosunclassified

“…Nessas estruturas, o elétron é confinado nas três direções [27]. Em uma primeira aproximação, podemos retornar ao problema da "partícula na caixa", porém agora em três dimensões: considera-se o ponto quântico como um paralelepípedo de barreiras infinitas, cujos lados são dados por L x , L y e L z .…”

Section: Pontos Quânticosunclassified

“…Estas densidades correspondem ao número de estados permitidos por intervalo de energia em torno de uma energia E: integrando a função densidades de estados D(E) entre E 1 e E 2 , por exemplo, obtém-se o número de estados permitidos neste intervalo [27,35]. É possível observar, de acordo com a Figura 2.10, que a densidade de estados das estruturas reflete o nível de confinamento do elétron.…”

Section: Pontos Quânticosunclassified

“…Finalmente, no ponto quântico, o elétron está confinado nas três direções e não possui componentes de ondas planas nas suas funções de onda. Os níveis de energia são discretos como em um átomo e a densidade de estados é composta por deltas de Dirac nos níveis de energia E(n x n y n z ) [27].…”

Section: Pontos Quânticosunclassified

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certain wavelength to produce excited electrons. [1,15,16] In addition, the crystal structure, composition, shape, and size of the nano-sized PTMs have been investigated to activate SPR electrons. [17][18][19] To date, SPRbased Au nanoparticles (NPs) have shown the highest PT conversion efficiency (η PT ) of 100%, [20] while hybrid semiconducting polymer ferro-therapeutic agents showed a slightly lower η PT (98.9%). [21] Furthermore, carbon-based nanomaterials and hybrid nanocomposites have been reported with an improved η PT over the years. Although carbonaceous nanomaterials and metallic nanomaterials have been examined by numerous researchers, these materials normally comprise NP-shaped powders and are not readily fabricated into various shapes or thin films with large areas. Additional issues related to inorganic PTMs include biocompatibility and environmental safety.Thus, many organic molecular PTMs (m-PTMs), including molecular dyes such as cyanines (Cys) and croconaines (Crocs), have been investigated, particularly for PTT and photoacoustic therapy (PAT). [22,23] However, to apply m-PTMs in PT devices that require film types, polymeric media are required, and thus the content of m-PTMs in the film is rather limited, to lower η PT from these films. Due to easy processability and low toxicity, polymeric PTMs (p-PTMs) are explored for thin film applications. [24][25][26][27][28][29][30] Furthermore, polymers are intrinsically thermal insulators and flexible. [31] Therefore, recent efforts have been devoted to developing p-PTMs. In particular, conjugated polymers (CPs) with long π-conjugated backbones of contiguous sp 2 -hybridized carbon atoms display high absorption in the visible to NIR region and are easily photoexcited. [4,32] Thus, a variety of CPs, including poly(3,4-ethylenedioxythiophene)s (PEDOTs), [29,30,33,34] polyanilines (PANIs), [35,36] and polypyrroles (PPys) [37][38][39] are potential candidate as p-PTMs. However, NIR energy utilization is impeded by the narrow absorption bandwidth in the visible region and the low charge-carrier mobility of polymers. Therefore, several strategies have been proposed to broaden the absorption spectra: 1) protonic acid doping and oxidative doping of CPs, 2) copolymerization of electronic donoracceptors (D-As), and 3) hybridization with carbonaceous materials, metals, and metal oxides, as reported for PANIs, PPys, PEDOTs, polydopamines (PDAs), and other CPs. [4] While many reviews of PTMs based on inorganic PTMs are available, [1][2][3][4][5][6]15,17,18,40,41] synthesis and PT mechanisms for thin film applications for organic PTMs remain rare. [31,42] Nonetheless, the PT applications using organic PTMs have dramatically With the growth of photoenergy harvesting and thermal engineering, photo thermal materials (PTMs) have attracted substantial interest due to their unique functions such as localized heat generation, spatiotemporal thermal control lability, invisibility, and light harvesting capabilities. In particular, πconjugated organic PTMs show advantages over...

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Fundamentals of Solid State Engineering

Cited by 30 publications

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Defective Y₂O_3−x–driven anomalous photocatalytic enhancement using Y₂O_3−x–TiO_2−x nanorod composite composition spreads

Defective Y₂O_3−x–driven anomalous photocatalytic enhancement using Y₂O_3−x–TiO_2−x nanorod composite composition spreads

Método Para Quantificação Dos Componentes Do Leite Utilizando Fotodetectores De Infravermelho Baseados Em Nanoestruturas

Conjugated Organic Photothermal Films for Spatiotemporal Thermal Engineering

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Fundamentals of Solid State Engineering

Cited by 30 publications

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Defective Y2O3−x–driven anomalous photocatalytic enhancement using Y2O3−x–TiO2−x nanorod composite composition spreads

Defective Y2O3−x–driven anomalous photocatalytic enhancement using Y2O3−x–TiO2−x nanorod composite composition spreads

Método Para Quantificação Dos Componentes Do Leite Utilizando Fotodetectores De Infravermelho Baseados Em Nanoestruturas

Conjugated Organic Photothermal Films for Spatiotemporal Thermal Engineering

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Product

Resources

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Defective Y₂O_3−x–driven anomalous photocatalytic enhancement using Y₂O_3−x–TiO_2−x nanorod composite composition spreads

Defective Y₂O_3−x–driven anomalous photocatalytic enhancement using Y₂O_3−x–TiO_2−x nanorod composite composition spreads