Structurally Composite Membranes of Titanium Oxide and Titanium Phosphorus Oxide for Proton Conduction at Intermediate Temperatures

2002 ◽  
Vol 752 ◽  
Author(s):  
Toshinori Tsuru ◽  
Yasuhito Yagi ◽  
Yosuke Kinoshita ◽  
Tomohisa Yoshioka ◽  
Masashi Asada
Keyword(s):  
Titanium Oxide ◽  
Sol Gel ◽  
Composite Membranes ◽  
Titanium Isopropoxide ◽  
Porous Titanium ◽  
Phosphorus Oxide ◽  
Conductive Membranes ◽  
Electrical Conductivities ◽  
Hydrolysis Of ◽  
Porous Titanium Oxide

ABSTRACTComposite membranes of titanium oxide and phosphorus oxide (TiP) were prepared by the sol-gel method and evaluated for use as proton conductive materials at intermediate temperatures. Titanium phosphorus oxide sol solutions were prepared by the hydrolysis of titanium isopropoxide (TTIP) using hydrochloric acid as a catalyst in isopropanol solutions, and the addition of an appropriate amount of phosphoric acid (H3PO4). A new concept for structurally composite membranes is proposed for proton conductive membranes. A composite membrane, Ti/TiP, where the pores of a porous titanium oxide layer are filled with titanium phosphorus oxide, was found to be effective for high electrical conductivity as well as mechanical strength. Electrical conductivities as high as 0.1 and 0.06 S cm−1 at 100 and 300 °C, respectively, under a partial pressure of water of 50 kPa, was achieved for the Ti/ TiP membranes.

Effects of Thermal Annealing on Formation of Micro Porous Titanium Oxide by the Sol?Gel Method

2006 ◽  
Vol 89 (11) ◽  
pp. 3536-3540 ◽  
Author(s):  
Hiroshi Koyama ◽  
Masayuki Fujimoto ◽  
Tomoya Ohno ◽  
Hisao Suzuki ◽  
Junzo Tanaka
Keyword(s):  
Titanium Oxide ◽  
Thermal Annealing ◽  
Sol Gel ◽  
Porous Titanium ◽  
Gel Method ◽  
Sol Gel Method ◽  
Porous Titanium Oxide

47,49Ti NMR in Metals, Inorganics, and Gels

2000 ◽  
Vol 55 (1-2) ◽  
pp. 291-297 ◽  
Author(s):  
T. J. Bastow
Keyword(s):  
Solid State ◽  
Titanium Oxide ◽  
Recent Progress ◽  
Titanium Isopropoxide ◽  
Metallic State ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrolysis Of ◽  
C Nmr

Some recent progress in solid state 47,49Ti NMR is described and reviewed. The metallic-state work described covers metals such as hep titanium, TiB2 , a number of intermetallics such as TiAl2 and TiAl3· The inorganic work covers the various titanium oxide based materials including the TiO2 polymorphs, anatase, rutile and brookite. The gel work covers the evolution of crystalline titania from gels formed by hydrolysis of titanium isopropoxide. Some complementary data from 17O and 13C NMR and powder X-ray diffraction is also included.

scholarly journals 1D TiO2 Nanostructures Prepared from Seeds Presenting Tailored TiO2 Crystalline Phases and Their Photocatalytic Activity for Escherichia coli in Water

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Julieta Cabrera ◽  
Dwight Acosta ◽  
Alcides López ◽  
Roberto J. Candal ◽  
Claudia Marchi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Photocatalytic Activity ◽  
Bactericidal Activity ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
E Coli ◽  
1D Nanostructures ◽  
Sol Gel Synthesis ◽  
Hydrolysis Of ◽  
Tio2 Nanostructures

TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3–100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.

Interwoven scaffolded porous titanium oxide nanocubes/carbon nanotubes framework for high-performance sodium-ion battery

2021 ◽  
Vol 59 ◽  
pp. 38-46
Author(s):  
Wen-Bei Yu ◽  
Wen-Da Dong ◽  
Chao-Fan Li ◽  
Nasiruddin Macadam ◽  
Jiu-Xiang Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Titanium Oxide ◽  
High Performance ◽  
Porous Titanium ◽  
Sodium Ion ◽  
Sodium Ion Battery ◽  
Porous Titanium Oxide

A novel characteristic of porous titanium oxide implants

2007 ◽  
Vol 18 (6) ◽  
pp. 680-685 ◽  
Author(s):  
Takashi Sawase ◽  
Ryo Jimbo ◽  
Ann Wennerberg ◽  
Naoki Suketa ◽  
Yasuhiro Tanaka ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Porous Titanium ◽  
Porous Titanium Oxide

Porous Titanium Oxide Microspheres as Promising Catalyst for Lithium–Oxygen Batteries

2020 ◽  
Vol 8 (3) ◽  
pp. 1901257 ◽  
Author(s):  
Juanjuan Ge ◽  
Gaohui Du ◽  
Miao Zhang ◽  
Abul Kalam ◽  
Shukai Ding ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Porous Titanium ◽  
Lithium Oxygen Batteries ◽  
Porous Titanium Oxide

Anodization: A Promising Nano-Modification Technique of Titanium Implants for Orthopedic Applications

2006 ◽  
Vol 6 (9) ◽  
pp. 2682-2692 ◽  
Author(s):  
Chang Yao ◽  
Thomas J. Webster
Keyword(s):  
Titanium Oxide ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Protective Oxide ◽  
Surface Features ◽  
Modification Technique ◽  
Titanium Surfaces ◽  
Anodized Titanium ◽  
Orthopedic Applications ◽  
Porous Titanium Oxide

Anodization is a well-established surface modification technique that produces protective oxide layers on valve metals such as titanium. Many studies have used anodization to produce micro-porous titanium oxide films on implant surfaces for orthopedic applications. An additional hydrothermal treatment has also been used in conjunction with anodization to deposit hydroxyapatite on titanium surfaces; this is in contrast to using traditional plasma spray deposition techniques. Recently, the ability to create nanometer surface structures (e.g., nano-tubular) via anodization of titanium implants in fluorine solutions have intrigued investigators to fabricate nano-scale surface features that mimic the natural bone environment. This paper will present an overview of anodization techniques used to produce micro-porous titanium oxide structures and nano-tubular oxide structures, subsequent properties of these anodized titanium surfaces, and ultimately their in vitro as well as in vivo biological responses pertinent for orthopedic applications. Lastly, this review will emphasize why anodized titanium structures that have nanometer surface features enhance bone forming cell functions.

scholarly journals Titanium Dioxide Nanofibers and Microparticles Containing Nickel Nanoparticles

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Faheem A. Sheikh ◽  
Javier Macossay ◽  
Muzafar A. Kanjwal ◽  
Abdalla Abdal-hay ◽  
Mudasir A. Tantry ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Production Systems ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Electrospinning Process ◽  
Internal Morphology ◽  
Hydrolysis Of ◽  
Potential Use ◽  
Sem Analyses

The present study reports on the introduction of various nanocatalysts containing nickel (Ni) nanoparticles (NPs) embedded within TiO2 nanofibers and TiO2 microparticles. Typically, a sol-gel consisting of titanium isopropoxide and Ni NPs was prepared to produce TiO2 nanofibers by the electrospinning process. Similarly, TiO2 microparticles containing Ni were prepared using a sol-gel syntheses process. The resultant structures were studied by SEM analyses, which confirmed well-obtained nanofibers and microparticles. Further, the XRD results demonstrated the crystalline feature of both TiO2 and Ni in the obtained composites. Internal morphology of prepared nanofibers and microparticles containing Ni NPs was characterized by TEM, which demonstrated characteristic structures with good dispersion of Ni NPs. In addition, the prepared structures were studied as a model for hydrogen production applications. The catalytic activity of the prepared materials was studied by in situ hydrolysis of NaBH4, which indicated that the nanofibers containing Ni NPs can lead to produce higher amounts of hydrogen when compared to other microparticles, also reported in this paper. Overall, these results confirm the potential use of these materials in hydrogen production systems.

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