Surfactant‐Free Sol–Gel Synthesis Method for the Preparation of Mesoporous High Surface Area NiO–Al 2 O 3 Nanopowder and Its Application in Catalytic CO 2 Methanation

2019 ◽  
Vol 8 (1) ◽  
pp. 1900778 ◽  
Author(s):  
Shima Valinejad Moghaddam ◽  
Mehran Rezaei ◽  
Fereshteh Meshkani
Keyword(s):  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Synthesis Method ◽  
Sol Gel Synthesis

Coupling Sol-Gel Synthesis and Microwave-Assisted Techniques: A New Route from Amorphous to Crystalline High-Surface-Area Aluminium Fluoride

2008 ◽  
Vol 14 (20) ◽  
pp. 6205-6212 ◽  
Author(s):  
Damien Dambournet ◽  
Gehan Eltanamy ◽  
Alexandre Vimont ◽  
Jean-Claude Lavalley ◽  
Jean-Michel Goupil ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Microwave Assisted ◽  
Aluminium Fluoride ◽  
Sol Gel Synthesis

Processing of Cr doped SrTiO3 nanoparticles into high surface area aerogels and thin films

2017 ◽  
Vol 1 (8) ◽  
pp. 1662-1667 ◽  
Author(s):  
Felix Rechberger ◽  
Gabriele Ilari ◽  
Christoph Willa ◽  
Elena Tervoort ◽  
Markus Niederberger
Keyword(s):  
Thin Films ◽  
Acetic Acid ◽  
Surface Area ◽  
Surface Functionalization ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Sol Gel Synthesis ◽  
Concentrated Dispersions

We present the nonaqueous sol–gel synthesis of crystalline SrTi1−xCrxO3 (x = 0, 0.3, 2, 5, 10%) nanoparticles and their processing into highly concentrated dispersions in ethanol by surface functionalization with 2-[2-(2-methoxyethoxy) ethoxy] acetic acid (MEEAA).

scholarly journals Low-Temperature Sol-Gel Synthesis of Nitrogen-Doped Anatase/Brookite Biphasic Nanoparticles with High Surface Area and Visible-Light Performance

Catalysts ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 376 ◽  
Author(s):  
Liang Jiang ◽  
Yizhou Li ◽  
Haiyan Yang ◽  
Yepeng Yang ◽  
Jun Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Nitrogen Doped ◽  
Sol Gel Synthesis

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.

Novel modified nonalkoxide sol–gel synthesis of multiphase high surface area TiO2 aerogels for photocatalysis

2020 ◽  
Vol 94 (2) ◽  
pp. 425-434 ◽  
Author(s):  
Joseane C. Bernardes ◽  
Geneviève K. Pinheiro ◽  
Daliana Muller ◽  
Eloah Latocheski ◽  
Josiel B. Domingos ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Sol Gel Synthesis
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