Structure identification of Ti(iv) clusters in low-temperature TiO2 crystallization: creating high-surface area brush-shaped rutile TiO2

CrystEngComm ◽  
2017 ◽  
Vol 19 (39) ◽  
pp. 5844-5848 ◽  
Author(s):  
Kazuhiro Manseki ◽  
Kazuki Saka ◽  
Masaki Matsui ◽  
Saeid Vafaei ◽  
Takashi Sugiura
Keyword(s):  
Low Temperature ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Large Surface Area ◽  
Structure Identification ◽  
Rutile Tio2 ◽  
First Time

We demonstrate for the first time a controlled reaction of Cl-coordinating Ti(iv) clusters in low-temperature hydrolysis (27 °C) to create large-surface area rutile TiO2 crystals.

Catalyst-free, low-temperature growth of high-surface area carbon nanoflakes on carbon cloth

2009 ◽  
Vol 255 (6) ◽  
pp. 3676-3681 ◽  
Author(s):  
Tsung-Chi Hung ◽  
Chia-Fu Chen ◽  
Chien-Chung Chen ◽  
Wha-Tzong Whang
Keyword(s):  
Low Temperature ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Cloth ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Catalyst Free ◽  
Carbon Nanoflakes

scholarly journals Melt Infiltration Processing of Foams Using Glass-Forming Alloys

2002 ◽  
Vol 754 ◽  
Author(s):  
C. San Marchi ◽  
A. Brothers ◽  
D. C. Dunand
Keyword(s):  
Thermal Conductivity ◽  
Metallic Glass ◽  
Relative Density ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Glass Forming ◽  
Melt Infiltration ◽  
First Time ◽  
Infiltration Techniques

ABSTRACTProcessing of foams from bulk metallic glass (BMG) alloys, using melt infiltration techniques, is reported for the first time. Foaming methods based on infiltration of two types of pattern materials are described: investment of a continuous refractory yielding very low relative density structures (5% dense relative to the BMG), and investment of a discontinuous refractory pellet bed yielding higher relative density (50–60% dense relative to the BMG). Both methods are capable of producing foam structures; however high surface area and diminished thermal conductivity, especially in lower density structures, make vitrification of the alloy difficult.

Supercritical flow synthesis of PtPdFe alloyed nanoparticles with enhanced low-temperature activity and thermal stability for propene oxidation under lean exhaust gas conditions

2019 ◽  
Vol 9 (23) ◽  
pp. 6691-6699
Author(s):  
Hugo Silva ◽  
Patricia Hernandez-Fernandez ◽  
Ane K. Baden ◽  
Henrik L. Hellstern ◽  
Anton Kovyakh ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Low Temperature ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Exhaust Gas ◽  
Propene Oxidation ◽  
Supercritical Flow ◽  
One Step ◽  
The One

Supercritical flow technology was used for the one step production of PtPd and PtPdFe nanoparticles supported on high surface area γ-Al2O3.

THERMAL PROCESSING OF BUNDLED TUNGSTEN OXIDE NANOWIRES

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1541-1547 ◽  
Author(s):  
SHIBIN SUN ◽  
YIMIN ZHAO ◽  
YONGDE XIA ◽  
ZENGDA ZOU ◽  
GUANGHUI MIN ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Wide Band ◽  
Temperature Limit ◽  
Wide Band Gap ◽  
Significant Drop ◽  
Oxide Nanowires ◽  
First Time

Taking the wide band gap one-dimensional (1-D) tungsten oxide nanowires as an example, we here demonstrate systematically the physical characteristics of thermally processed nanowires at temperatures ranging from 400°C to 1000°C, for the first time. Accompanied by a significant drop of specific surface area from 151 m2/g for the as-prepared nanowires to 109 m2/g and 66 m2/g subject to annealing at 400°C and 450°C, dramatically morphology evolution and phase transformation have also been observed. The nanostructured bundles became straighter, larger in diameters and shorter in length, and eventually became irregular particles with size up to 5 µm. The Brunauer-Emmett-Tettler (BET) result suggests that 400°C can be considered as a top temperature limit in nanodevice design where high surface area is important, e.g. in gas sensors. A protocol for thermally processing of these bundled tungsten nanowires has been established.

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