AlCl3-Grafted Si–MCM-41: Influence of Thermal Treatment Conditions on Surface Properties and Incorporation of Al in the Structure of MCM-41

2002 ◽  
Vol 205 (1) ◽  
pp. 221-225 ◽  
Author(s):  
Vasant R. Choudhary ◽  
Kshudiram Mantri
2016 ◽  
Vol 58 ◽  
pp. 119-126 ◽  
Author(s):  
Dohiko Terada ◽  
Yoshiyuki Yokoyama ◽  
Shinya Hattori ◽  
Hisatoshi Kobayashi ◽  
Yasushi Tamada

2018 ◽  
Vol 202 ◽  
pp. 67-75 ◽  
Author(s):  
Lutfi Agartan ◽  
Bilen Akuzum ◽  
Tyler Mathis ◽  
Kurtay Ergenekon ◽  
Ertan Agar ◽  
...  

2016 ◽  
Vol 65 (2) ◽  
pp. 432-439 ◽  
Author(s):  
A. A. Shesterkina ◽  
L. M. Kozlova ◽  
O. A. Kirichenko ◽  
G. I. Kapustin ◽  
I. V. Mishin ◽  
...  

2014 ◽  
Vol 604 ◽  
pp. 249-253 ◽  
Author(s):  
Agnese Pura ◽  
Janis Locs ◽  
Liga Berzina-Cimdina

TiO2samples were obtained by extrusion process, sintered in air at 1000 °C, 1100 °C, 1200°C and 1300 °C and, afterwards, thermally treated under vacuum conditions at 1250 °C for 1 hour applying two different heating/cooling rates (2 °C/min and 5 °C/min). It was found that thermal treatment conditions substantially affected thermoelectric properties of the samples. Increasing sintering temperature, during the sample thermal treatment in air, the electrical conductivity of the specimens increased, while Seebeck coefficient decreased. With an increase in the heating rate during the vacuum heat treatment of the samples, the electrical conductivity of the samples decreased, while Seebeck coefficient increased.


2005 ◽  
Vol 129 ◽  
pp. 207-211 ◽  
Author(s):  
W. M. Buda ◽  
S. Pasieczna ◽  
J. Ryczkowski ◽  
J. Goworek

2018 ◽  
Vol 5 (2) ◽  
pp. 268-274 ◽  
Author(s):  
Li-Sheng Wang ◽  
Sanjana Gopalakrishnan ◽  
Yi-Wei Lee ◽  
Jiaxin Zhu ◽  
Stephen S. Nonnenmann ◽  
...  

Heat treatment in fluorous solvents generates stable films on 3D substrates, enabling translation of protein molecular properties into film characteristics.


Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 163 ◽  
Author(s):  
Reza Katal ◽  
Saeideh Kholghi Eshkalak ◽  
Saeid Masudy-panah ◽  
Mohammadreza Kosari ◽  
Mohsen Saeedikhani ◽  
...  

In this report, the photocatalytic activity of P25 has been explored and the influence of thermal treatment under various atmospheres (air, vacuum and hydrogen) were discussed. The samples’ characteristics were disclosed by means of various instruments including X-ray diffraction (XRD), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS) and UV–vis. This study also accentuates various states of the oxygen vacancy density formed inside the samples as well as the colour turning observed in treated P25 under various atmospheres. Produced coloured TiO2 samples were then exploited for their photocatalytic capability concerning photodegradation of methylene blue (MB) using air mass (AM) 1.5 G solar light irradiation. Our findings revealed that exceptional photocatalytic activity of P25 is related to the thermal treatment. Neither oxygen vacancy formation nor photocatalytic activity enhancement was observed in the air-treated sample. H2-treated samples have shown better photoactivity which even could be further improved by optimizing treatment conditions to achieve the advantages of the positive role of oxygen vacancy (O-vacancy at higher concentration than optimum acts as electron trapping sites). The chemical structure and stability of the samples were also studied. There was no sign of deteriorating of O2-vacancies inside the samples after 6 months. High stability of thermal treated samples in terms of both long and short-term time intervals is another significant feature of the produced photocatalyst.


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