Nanostructured thin films based on TiO2 and/or SiC for use in photoelectrochemical cells: A review of the material characteristics, synthesis and recent applications

Pessoa, Rodrigo Sávio; Fraga, Mariana Amorim; Santos, L.V.; Massi, M.; Maciel, Homero Santiago

doi:10.1016/j.mssp.2014.05.053

Cited by 85 publications

(39 citation statements)

References 136 publications

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“…Silicon carbide (SiC) possesses various attractive properties such as high thermostability, mechanical strength, and electrical conductivity; low density; anti-oxidation stability; large surface area and corrosion resistance; and high temperature endurance, all of which translates into them being applicable in harsh environments that require high durability (Pessoa et al 2015). Also, SiC is malleable and can be made into a filter for catalyst support.…”

Section: Tio 2 /Sic Hybrid Photocatalytic Systemmentioning

confidence: 99%

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

Amir

Julkapli

Yousefi³

2015

Reviews in Inorganic Chemistry

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AbstractFor the past 40 years, titanium dioxide (TiO2) nanomaterials have attracted immense attention because of their potential applications in the photodegradation of organic pollutants, photocatalytic water splitting for H2 generation, and dye-sensitized solar cells. Despite the fact that the potential applications of TiO2 nanoparticles are ubiquitous, they are not problem free, examples include a large interfacial area that causes slow charge carrier transport, a wide optical band gap that leads to limited applications using solar light, and single-phase and nanoscales features that induce fast recombination of photo-reduced carriers. Therefore, this review highlights the development associated with the adsorption photocatalysis hybrid system for treating wastewater. The immobilization of TiO2 photocatalysts in metal oxide, carbon, and ceramic materials to form TiO2 hybrid systems could prevent the problem of particle recovery, adsorption capacity, and the separation process. Such hybrid systems require significant effort of optimizing the specific surface area-to-volume ratio of the supported photocatalysts with its photocatalytic activities.

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Section: Tio 2 /Sic Hybrid Photocatalytic Systemmentioning

confidence: 99%

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

Amir

Julkapli

Yousefi³

2015

Reviews in Inorganic Chemistry

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“…Silicon carbide (SiC) has been proved as promising material for microelectronic applications due to its excellent physical and electronic properties, such as high surface hardness, wide bandgap and high thermal conductivity at low and high temperatures [1][2][3][4][5][6]. These outstanding properties make it an attractive material for the development of harsh-environment devices such as Micro-Electro-Mechanical Systems (MEMS) and power electronics [5,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The Influence of AlN Buffer Layer on the Structural and Chemical Properties of SiC Thin Films Produced by High-Power Impulse Magnetron Sputtering

Galvão¹,

Guerino²,

Campos³

et al. 2019

Preprint

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Many strategies have been developed for the synthesis of silicon carbide (SiC) thin films on silicon (Si) substrates by plasma-based deposition techniques, especially plasma enhanced chemical vapor deposition (PECVD) and magnetron sputtering, due to importance of these materials for microelectronics and related fields. A drawback is the large lattice mismatch between SiC and Si. The insertion of a thin aluminum nitride (AlN) buffer layer between them has been shown useful to overcome this problem. Herein, the high-power impulse magnetron sputtering (HiPIMS) technique was used to grow SiC thin films on AlN/Si substrates. Furthermore, the SiC films were also grown on Si substrates. Comparisons of the structural and chemical properties of SiC thin films grown on the two types of substrates allowed us to evaluate the influence of AlN buffer layer on such properties. The chemical composition and stoichiometry of the samples were investigated by Rutherford backscattering spectrometry (RBS) and Raman spectroscopy, while the crystallinity was characterized by grazing incidence X-ray diffraction (GIXRD). Our set of results evidenced the versatility of HiPIMS technique to produce polycrystalline SiC thin films at near room temperature only varying the discharge power. In addition, this study opens up a feasible route for the deposition of crystalline SiC films with a good structural quality using AlN buffer layer.

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“…It has a cubic structure and exhibits excellent physical and chemical properties essential in heterogeneous catalytic reactions. Most important of them are as follows: high thermal conductivity, low specific weight, insolubility in water and chemical inertness and the lowest band gap energy (2.36 eV) among other commonly used hexagonal SiC structures: 4H-SiC (3.20 eV) and 6H-SIC (3.00 eV) (8). Recent paper of Digdaya et al (16) describes in detail the coupling of the a-SiC photocathodes with an amorphous TiO 2 coatings in a form of the hetero p-i-n junction, to enhance the photoactivity in the water splitting process.…”

Section: Introductionmentioning

confidence: 99%

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Pstrowska

Szyja

Czapor-Irzabek

et al. 2017

Photochem & Photobiology

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The TiO /beta-SiC nanocomposites containing 0-25 wt. % of beta-SiC were synthesized by the sol-gel method and tested in the photodegradation of methylene blue and methyl orange water solutions. With the increase in SiC content, only a slight decrease in energy band gap was observed (3.19-3.12 eV), together with significant increase in the surface area of the catalysts (42.7-80.4 m g ). In the synthesized material, the anatase phase of TiO was present in the form of small agglomerates resulting from the mechanical mixing process. In the process conditions (catalyst concentration 0.5 g L , initial dye concentration 100 ppm, light source 100 W UV-Vis lamp), we have observed no signs of catalyst deactivation. The significantly higher photodegradation activity of methylene blue than methyl orange can be attributed to the preferable pH of the solution compared to pH and the cationic character of the first dye. In case of methyl orange, pH process conditions substantially limit the contact of the catalyst with the dye, as negatively charged surface of the catalysts repels the dissociated anionic dye molecules.

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Nanostructured thin films based on TiO2 and/or SiC for use in photoelectrochemical cells: A review of the material characteristics, synthesis and recent applications

Cited by 85 publications

References 136 publications

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

The Influence of AlN Buffer Layer on the Structural and Chemical Properties of SiC Thin Films Produced by High-Power Impulse Magnetron Sputtering

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

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Nanostructured thin films based on TiO2 and/or SiC for use in photoelectrochemical cells: A review of the material characteristics, synthesis and recent applications

Cited by 85 publications

References 136 publications

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

TiO2 hybrid photocatalytic systems: impact of adsorption and photocatalytic performance

The Influence of AlN Buffer Layer on the Structural and Chemical Properties of SiC Thin Films Produced by High-Power Impulse Magnetron Sputtering

The Properties and Activity of TiO2/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

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The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation