Water-Catalyzed Low-Temperature Transformation from Amorphous to Semi-Crystalline Phase of Ordered Mesoporous Titania Framework

2013 ◽  
Vol 2 (2) ◽  
pp. 120-125 ◽  
Author(s):  
Karine Assaker ◽  
Cédric Carteret ◽  
Bénédicte Lebeau ◽  
Claire Marichal ◽  
Loïc Vidal ◽  
...  
Keyword(s):  
Low Temperature ◽  
Crystalline Phase ◽  
Mesoporous Titania ◽  
Ordered Mesoporous ◽  
Temperature Transformation

scholarly journals Spray Deposition Synthesis of Locally Ordered Mesoporous Polycrystalline Titania Films at Low Temperature

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 303
Author(s):  
Gunnar Símonarson ◽  
Antiope Lotsari ◽  
Anders E. C. Palmqvist
Keyword(s):  
Low Temperature ◽  
Aging Time ◽  
Self Assembly ◽  
Spray Deposition ◽  
Spray Coating ◽  
Mesoporous Titania ◽  
Structure Directing Agent ◽  
Synthesis Time ◽  
Ordered Mesoporous ◽  
Titania Films

A low-temperature spray deposition synthesis was developed to prepare locally hexagonally ordered mesoporous titania films with polycrystalline anatase pore walls in an evaporation-induced self-assembly process. The titania film preparation procedure is conducted completely at temperatures below 50 °C. The effects of spray time, film thickness, synthesis time prior to spray deposition, and aging time at high relative humidity after deposition on the atomic arrangement and the mesoorder of the mesoporous titania were studied. We find the crystallite size to depend on both the synthesis time and aging time of the films, where longer times result in larger crystallites. Using the photocatalytic activity of titania, the structure-directing agent is removed with UV radiation at 43–46 °C. The capability of the prepared films to remove the polymer template increased with longer synthesis and aging times due to the increased crystallinity, which increases the photocatalytic efficiency of the titania films. However, with increasingly longer times, the crystallites grow too large for the mesoorder of the pores to be maintained. This work shows that a scalable spray coating method can be used to prepare locally ordered mesoporous polycrystalline titania films by judiciously tuning the synthesis parameters.

scholarly journals Nitrogen-doped carbon materials with cubic ordered mesostructure: low-temperature autoclaving synthesis for electrochemical supercapacitor and CO2 capture

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12524-12533 ◽  
Author(s):  
Lei Liu ◽  
Shi-Da Xu ◽  
Feng-Yun Wang ◽  
Yue-Jun Song ◽  
Jie Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Capture ◽  
Carbon Materials ◽  
Mesoporous Carbons ◽  
Body Centered Cubic ◽  
Ordered Mesoporous Carbons ◽  
Nitrogen Doped ◽  
Electrochemical Supercapacitor ◽  
Ordered Mesoporous ◽  
Nitrogen Doped Carbon

Nitrogen doped ordered mesoporous carbons with a 3-D body-centered cubic pore structure have been synthesized by means of a low-temperature autoclaving route under basic conditions, showing excellent performances for supercapacitors and CO2 capture.

CO2 methanation over Co Ni bimetal-doped ordered mesoporous Al2O3 catalysts with enhanced low-temperature activities

2018 ◽  
Vol 43 (36) ◽  
pp. 17172-17184 ◽  
Author(s):  
Leilei Xu ◽  
Xinbo Lian ◽  
Mindong Chen ◽  
Yan Cui ◽  
Fagen Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Methanation ◽  
Ordered Mesoporous

Effect of metal ion addition on structural characteristics and photocatalytic activity of ordered mesoporous titania

2019 ◽  
Vol 91 (3) ◽  
pp. 539-551 ◽  
Author(s):  
Ahmed Mudhafar Mohammed ◽  
Michael Sebek ◽  
Carsten Kreyenschulte ◽  
Henrik Lund ◽  
Jabor Rabeah ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Metal Ion ◽  
Structural Characteristics ◽  
Mesoporous Titania ◽  
Ordered Mesoporous
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