Supercritical antisolvent precipitation of TiO2 with tailored anatase/rutile composition for applications in redox catalysis and photocatalysis
نویسندگان
چکیده
منابع مشابه
Supercritical Antisolvent Precipitation of TiO2 with Tailored Anatase/Rutile Composition for Applications in Redox Catalysis and Photocatalysis
TiO2 with tailored anatase/rutile composition has been prepared from the supercritical antisolvent (SAS) precipitation of a range of titanium alkoxides. The calcination of the SAS TiO2 was monitored by in situ powder X-ray diffraction to determine the optimal calcination conditions for the formation of a mixed anatse/rutile phase TiO2. The SAS precipitated material calcined at 450 °C produced a...
متن کاملSupercritical antisolvent precipitation of PHBV microparticles.
The micronization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from organic solutions using supercritical antisolvent (SAS) technique has been successfully achieved. SAS experiments were carried out at different operational conditions and microspheres with mean diameters ranging from 3 to 9 microm were obtained. The effect of CO(2) and liquid flow, temperature and pressure on particle...
متن کاملPurification and Simultaneous Micronization of Polymers by Supercritical Antisolvent Precipitation
One of the most important environmental concerns for the polymer industry is to produce new products with near-zero residual monomer content. A new process based on supercritical CO2 has been successfully tested for the extraction of the residual monomer and the simultaneous micronization of the polymer. The process has been tested on a pilot-scale plant. The reduction of methyl methacrylate (M...
متن کاملSupercritical Antisolvent (sas) Co-precipitation of Ethyl Cellulose and Natural Extracts in Sc-co2
The objective of this work has been the co-precipitation of the coating material Ethyl Cellulose (EC) and two natural extracts (IDOKI SCF Technologies), R1 and P1, using the Supercritical Antisolvent (SAS) precipitation technique with supercritical carbon dioxide (SC-CO2), in order to obtain active microparticles. EC is a hydrophobic material widely used for controlled delivery systems, sustain...
متن کاملAmorphous Vanadium Phosphate Catalysts Prepared using Precipitation with Supercritical CO2 as an Antisolvent
A new preparative route for vanadium phosphate catalysts is described using supercritical CO2 as an antisolvent. The amorphous microspheroidal VPO produced is shown to be more active than comparable crystalline VPO catalysts for the selective oxidation of n-butane to maleic anhydride and, furthermore, does not require an extensive pre-treatment or activation period to establish full catalytic a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Catalysis A: General
سال: 2015
ISSN: 0926-860X
DOI: 10.1016/j.apcata.2015.02.023