Effect of graphite silica on TiO2 photocatalysis in hydrogen production from water–methanol solution

Ikeda, Miyuki; Kusumoto, Yoshihumi; Somekawa, Shouichi; Ngweniform, Pascaline; Ahmmad, Bashir

doi:10.1016/j.jphotochem.2006.04.031

Cited by 28 publications

(10 citation statements)

References 16 publications

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“…The physical mixing of the two solids improved the photocatalytic performance with respect to pure TiO 2 , though a comparison with a typical Pt/TiO 2 formulation revealed ca. one eight H 2 productivity, only [172]. Therefore, graphite silica was added to a Pt + TiO 2 mixture, obtaining an increase of H 2 productivity by 150%.…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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This paper focuses on the application of photocatalysis to hydrogen production from organic substrates. This process, usually called photoreforming, makes use of semiconductors to promote redox reactions, namely, the oxidation of organic molecules and the reduction of H + to H 2 . This may be an interesting and fully sustainable way to produce this interesting fuel, provided that materials efficiency becomes sufficient and solar light can be effectively harvested. After a first introduction to the key features of the photoreforming process, the attention will be directed to the needs for materials development correlated to the existing knowledge on reaction mechanisms. Examples are then given on the photoreforming of alcohols, the most studied topic, especially in the case of methanol and carbohydrates. Finally, some examples of more complex but more interesting substrates, such as waste solutions, are proposed.

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Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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“…Since Fujishima and Honda discovered photocatalytic splitting of water on semiconductor electrodes in 1972 [1], a clean and effective method to produce hydrogen comes into our sight. From then on, over 100 catalyzers, including TiO2, WO3, Bi2WO6, ZnO, Bi2O3 and CdS have been found to play an important role in hydrogen production [2][3][4][5][6]. However, the long distance that photo-generated electrons and holes have to migrate before reaching the solid & water interface leads to the high carrier recombination rate [7].…”

Section: Introductionmentioning

confidence: 99%

The novel two-dimensional photocatalyst SnN₃with enhanced visible-light absorption for overall water splitting

Shen

Gao

et al. 2019

Nanoscale

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We propose a novel excellent two-dimensional photocatalyst SnN3 monolayer using first-principles calculations. The stability of SnN3 monolayer have been examined via formation energy, phonon spectrum and ab initio molecular dynamics calculations. Large optical absorption capacity plays significant role in the enhancement of photocatalytic splitting of water. The SnN3 monolayer have ultra-high optical absorption capacity in visible region, which is as three and four times as that of SnP3 and MoS2 monolayer, respectively. Available potential and appropriate band positions indicating the ability of overall water splitting even in a wide strain range.Electronic properties of SnN3 monolayer can also be engineered effectively via the external strain, such as the conversion from in-direct band gap to direct band gap. The applied electric field splits the energy levels due to Stark effect, resulting in states accumulation and smaller gap width.

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“…The combination of TiO 2 -SiO 2 as a catalyst in the photocatalytic process showed an excellent activity to degrade organic compound, phenol, and linear alkyl benzenesulfonate [3]. Also, graphite silica was used by Ikeda et al to the photocatalytic process to produce hydrogen [24]. The GS successfully combined with TiO 2 , and as the results, the photocatalytic activity increases significantly.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Application of Titanium-Silica-Graphite Composite Material for Photocatalytic Process of Methylene Blue

Destiarti

Sasri

2020

Indones. J. Chem.

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The use of TiO2 in the slurry system for the photocatalytic process has disadvantages. It causes the resistance of UV transmission because it is cloudy and the difficulty for obtaining the catalyst at the end of the process. Therefore, an attempt to overcome this was conducted by compositing TiO2 on SiO2. Furthermore, carbon material can be used as a support material for TiO2-SiO2, so that the mixed materials can be used as a photocatalyst. The methods for synthesis the material was a sol-gel method by varying the composition of TiO2-SiO2/graphite, which was 1:1; 1:2; and 2:1. The material obtained was characterized by FTIR, DRUV, XRD, and SEM. Photocatalytic activity of the synthesized material was tested in methylene blue solution whereas the quantitative data derived from UV-Vis spectrometry measurement. Photocatalyst activity was carried out by varying the degradation time of 30–180 min. The FTIR spectrum showed that O-H (~3400 cm–1) and C-O (~1100 cm–1) are the major groups in the synthesized materials. The value of bandgap energy (Eg) were 4.15, 4.20, 5.22, and 5.19 eV for TiO2-SiO2, TiO2-SiO2/G (1:1; 1:2; and 2:1) composites, respectively. The XRD pattern of TiO2-SiO2 showed that the highest peaks of 2q were observed at 25.32, 37.71 and 47.91°. Graphite identity appeared at 2q = 59.87°. Micrograph of SEM showed a homogenous dispersion of spherical particles in the materials. Photocatalytic test results showed that TiO2-SiO2/G with a composition of 2:1 has the highest percentage of methylene blue degradation, which reached 94% at 180 min.

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Effect of graphite silica on TiO2 photocatalysis in hydrogen production from water–methanol solution

Cited by 28 publications

References 16 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

The novel two-dimensional photocatalyst SnN₃with enhanced visible-light absorption for overall water splitting

Application of Titanium-Silica-Graphite Composite Material for Photocatalytic Process of Methylene Blue

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Effect of graphite silica on TiO2 photocatalysis in hydrogen production from water–methanol solution

Cited by 28 publications

References 16 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

The novel two-dimensional photocatalyst SnN3with enhanced visible-light absorption for overall water splitting

Application of Titanium-Silica-Graphite Composite Material for Photocatalytic Process of Methylene Blue

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Product

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The novel two-dimensional photocatalyst SnN₃with enhanced visible-light absorption for overall water splitting