scholarly journals High surface area, amorphous titania with reactive Ti3+ through a photo-assisted synthesis method for photocatalytic H2 generation

2017 ◽  
Vol 5 (22) ◽  
pp. 10957-10967 ◽  
Author(s):  
Dennis Zywitzki ◽  
Hangkun Jing ◽  
Harun Tüysüz ◽  
Candace K. Chan
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method ◽  
Good Activity ◽  
H2 Generation ◽  
Amorphous Titania ◽  
Photocatalytic H2 Generation

A facile approach for the preparation of high surface area, Ti3+ containing titania with good activity for photocatalytic H2 production is reported.

scholarly journals Correction: High surface area, amorphous titania with reactive Ti3+ through a photo-assisted synthesis method for photocatalytic H2 generation

2017 ◽  
Vol 5 (27) ◽  
pp. 14444-14444
Author(s):  
Dennis Zywitzki ◽  
Hangkun Jing ◽  
Harun Tüysüz ◽  
Candace K. Chan
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method ◽  
H2 Generation ◽  
Amorphous Titania ◽  
Photocatalytic H2 Generation

Correction for ‘High surface area, amorphous titania with reactive Ti3+ through a photo-assisted synthesis method for photocatalytic H2 generation’ by Dennis Zywitzki et al., J. Mater. Chem. A, 2017, 5, 10957–10967.

Photocatalytic H2 generation on macro-mesoporous oxide-supported Pt nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (22) ◽  
pp. 18198-18203 ◽  
Author(s):  
Song Yi Moon ◽  
Brundabana Naik ◽  
Kwangjin An ◽  
Sun Mi Kim ◽  
Jeong Young Park
Keyword(s):  
Surface Area ◽  
Water Splitting ◽  
High Surface ◽  
High Surface Area ◽  
Pt Nanoparticles ◽  
H2 Generation ◽  
Mesoporous Oxide ◽  
Photocatalytic H2 Generation ◽  
Mesoporous Oxides

Photocatalysts with high surface area and crystalline walls are synthesized through a dual-templating strategy. The role of ordered macro-mesoporous oxides with crystalline walls was studied for photocatalytic water splitting to generate H2.

High surface area submicrometer-sized β-SiC particles grown by shape memory synthesis method

2005 ◽  
Vol 14 (8) ◽  
pp. 1353-1360 ◽  
Author(s):  
Nicolas Keller ◽  
Olivier Reiff ◽  
Valérie Keller ◽  
Marc J. Ledoux
Keyword(s):  
Shape Memory ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method ◽  
Sic Particles ◽  
Memory Synthesis

scholarly journals A facile, green and efficient surfactant-free method for synthesis of aluminum nanooxides with an extraordinary high surface area

2016 ◽  
Vol 45 (15) ◽  
pp. 6329-6333 ◽  
Author(s):  
Gholamhossein Mohammadnezhad ◽  
Oluseun Akintola ◽  
Winfried Plass ◽  
Frank Steiniger ◽  
Martin Westermann
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method

Nano boehmite with unprecedented high surface area and pore volume (802 m2 g−1, 2.35 cm3 g−1) was prepared using a facile, green and efficient surfactant-free synthesis method.

Photocatalytic Degradation of Acetaldehyde by Sol-Gel TiO2 Nanoparticles: Effect of the Physicochemical Properties on the Photocatalytic Activity

2011 ◽  
Vol 691 ◽  
pp. 92-98 ◽  
Author(s):  
R. Carrera ◽  
A.L. Vázquez ◽  
S. Castillo ◽  
E.M. Arce Estrada
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
Photocatalytic Oxidation ◽  
Crystal Size ◽  
Uv Light ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Synthesis Method

Nowadays, nanostructured semiconductor materials offer promising opportunities for a new generation of materials such as TiO2nanoparticles with improved properties for their application in the environmental catalysis field. It is well known that the phocatalytic activity of the TiO2nanoparticles is strongly dependent on the surface area, crystal size, phase composition and synthesis method. Thus, the preparation conditions clearly affect the photocatalytic activity of the TiO2nanoparticles. This work deals with the study of the structure of TiO2nanoparticles that were synthesized by the sol-gel method (using isopropanol as solvent), and calcined at 200 and 500°C. The obtained samples were characterized by the XRD-Rietveld refinement, BET and TEM techniques; and tested in the photodecomposition of acetaldehyde. The evaluations were carried out at room temperature by using CH3CHO (300 ppmv), O2(2.0 %) in helium balance in a quartz glass photoreactor (gas phase) with a 365-UV light lamp. According to the results, the sample that presented the highest activity in the photocatalytic oxidation of acetaldehyde (96.4%) was the one annealed at 200 °C. This sample showed the following proportion of phases: anatase (62.88%) with a tetragonal structure (a=0.3790926, b=0.3790926, c=0.9495732) nm; and b) brookite (37.12%) with an orthorhombic structure (a=0.9167624, b=0.5416461, c=0.5210546) nm. The surface area was 189 m2/g and the average crystal size was 7.03 nm. From the results, it can be seen that this material showed high activity in the photocatalytic degradation of acetaldehyde because of: the presence of a mixture of the anatase (higher proportion) and brookite phases, nanometric crystal size and high surface area obtained in this TiO2material. According to the aforementioned, this material can be considered as a good option for the decomposition of acetaldehyde and other volatile organic compounds (VOCs) in confined spaces.

The dissociative adsorption of hydrogen sulfide over nanophase titanium dioxide

1992 ◽  
Vol 7 (10) ◽  
pp. 2840-2845 ◽  
Author(s):  
Donald D. Beck ◽  
Richard W. Siegel
Keyword(s):  
Surface Area ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method ◽  
Dissociative Adsorption ◽  
Initial Activity ◽  
Adsorption Activity ◽  
Rutile Structure ◽  
Temperature Programmed

A variety of TiO2 materials, including a nanophase TiO2 powder, were evaluated for their ability to dissociatively adsorb H2S in a H2 environment. A temperature programmed desorption technique was used to determine the rate of sulfide accumulation on the surface of the samples as a measurement of initial activity. The initial activity for the gas condensation-produced nanophase TiO2 with its rutile structure was found to be greater than that for other samples of TiO2 tested. When normalized for surface area, the initial specific activities of the rutile samples studied for the dissociative adsorption of H2S were similar in magnitude, but significantly higher than those of the anatase TiO2 samples investigated. Thus, the improvement in the activity is attributed mainly to the ability of the nanophase synthesis method to produce high surface area rutile TiO2. When evaluated using x-ray photoelectron spectroscopy, the nanophase TiO2 was found to be significantly deficient in oxygen. Annealing this material in oxygen decreased the number of anion vacancies and lowered the activity. Thus, we conclude that oxygen vacancies also contribute to the H2S dissociative adsorption activity.

scholarly journals An in situ XAS study of high surface-area IrO2 produced by the polymeric precursor synthesis

2020 ◽  
Vol 22 (34) ◽  
pp. 18868-18881
Author(s):  
Anita Hamar Reksten ◽  
Andrea E. Russell ◽  
Peter W. Richardson ◽  
Stephen J. Thompson ◽  
Karina Mathisen ◽  
...  
Keyword(s):  
Thin Layer ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis Method ◽  
Polymeric Precursor ◽  
Potential Cycling ◽  
Precursor Synthesis ◽  
Elemental Component

In situ XAS measurements show that iridium oxide electrocatalysts manufactured by the polymeric precursor synthesis method contain a significant fraction of elemental iridium metal and that potential cycling only oxidises a thin layer of the elemental component of the composite.

Preparation of high-surface-area Ni/α-Al2O3 catalysts for improved CO methanation

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7539-7546 ◽  
Author(s):  
Youjun Liu ◽  
Jiajian Gao ◽  
Qing Liu ◽  
Fangna Gu ◽  
Xiaopeng Lu ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Good Activity ◽  
Co Methanation ◽  
Α Al2o3

High-surface-area Ni/α-Al2O3 catalysts exhibit good activity, stability and coking-resistance because the high-surface-area support is favorable to the dispersion of Ni.

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