Nanocomposite support materials

Catalyst – solid sorbent – or support therefor: product or process – Miscellaneous

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C502S232000, C502S349000, C502S355000, C423S335000, C423S608000, C423S625000, C423S593100

Reexamination Certificate

active

08003567

ABSTRACT:
The present teachings are directed toward hexagonally patterned porous titania synthesized from a titanium isopropoxide precursor using a viscous template of surface-active agents separating nanoscopic bicontinuous channels of water and isooctane. Subsequent catalyst metal salt reduction in the aqueous nanochannels deposits well-separated catalyst metal nanoparticles on the pore surfaces. These nanocomposites exhibit significantly higher carbon monoxide oxidation efficiency than that obtained with known supports with higher specific surface area; efficiency is believed to be due to decreased mass transfer resistance provided the presently disclosed support material.

REFERENCES:
patent: 4956329 (1990-09-01), Chao et al.
patent: 6221805 (2001-04-01), Yamashita et al.
patent: 6228340 (2001-05-01), Imhof et al.
patent: 6391989 (2002-05-01), Bohnen et al.
patent: 6413489 (2002-07-01), Ying et al.
patent: 6482766 (2002-11-01), Chaumette et al.
patent: 6869584 (2005-03-01), Ying et al.
patent: 7297654 (2007-11-01), Kimura et al.
patent: 7605108 (2009-10-01), Wakamatsu et al.
patent: 2002/0110519 (2002-08-01), Ying et al.
patent: 2004/0087438 (2004-05-01), Blechert et al.
patent: 2004/0171483 (2004-09-01), Takeshima
patent: 2005/0152832 (2005-07-01), Ying et al.
patent: 2006/0120941 (2006-06-01), Chen et al.
patent: 2007/0009417 (2007-01-01), Wong et al.
patent: 2007/0066479 (2007-03-01), Takeshima et al.
Sarkar et al. “Surfactant-Templated Synthesis and Catalytic Properties of Patterned Nanoporous Titania Supports Loaded with Platinum Nanoparticles”, Chem. Mater. 2008, 20, 5301-5306, Published Online: Jul. 30, 2008.
Giraud, Sophie, Guillaume Loupias, Hicham Maskrot, Nathalie Herlin-Boime, Sabine Valange, Erwan Guélou, Joël Barrault, and Zelimir Gabelica. 2007. “Dip-Coating on TiO2 Foams Using a Suspension of Pt-TiO2 Nanopowder Synthesized by Laser Pyrolysis—Preliminary Evaluation of the Catalytic Performances of the Resulting Composites in deVOC Reactions.” Journal of the European Ceramic Society. vol. 27, pp. 931-936.
Francioso, L., D.S. Presicce, R Siciliano, and A Ficarella. 2007. “Combustion Conditions Discrimination Properties of Pt-Doped TiO2 Thin Film Oxygen Sensor.” Sensors and Actuators B. vol. 123, pp. 516-521.
Kotsifa, Areti, Dimitris I. Kondarides, and Xenophon E. Verykios. 2007. “Comparative Study of the Chemisorptive and Catalytic Properties of Supported Pt Catalysts Related to the Selective Catalytic Reduction of NO by Propylene.” Applied Catalysis B: Environmental. vol. 72, pp. 136-148.
Mizukoshi, Yoshiteru, Yoji Makise, Tatsuya Shuto, Jinwei Hu, Aki Tominaga, Sayoko Shironita, and Shuji Tanabe. 2007. “Immobilization of Noble Metal Nanoparticles on the Surface of TiO2 by the Sonochemical Method: Photocatalytic Production of Hydrogen from an Aqueous Solution of Ethanol.” Ultrasonics Sonochemistry. vol. 14, pp. 387-392.
Han, You, Chang-jun Liu, and Qingfeng Ge. 2006. “Interaction of Pt Clusters with the Anatase TiO2(101) Surface: A First Principles Study.” J. Phys. Chem. B. vol. 110, No. 14, pp. 7463-7472.
Iida, Hajime, and Akira Igarashi. 2006. “Characterization of a Pt/TiO2 (Rutile) Catalyst for Water Gas Shift Reaction at Low-Temperature.” Applied Catalysis A: General. vol. 298, pp. 152-160.
Li, Yuexiang, Yanzhao Xie, Shaoqin Peng, Gongxuan Lu, and Shuben Li. 2006. “Photocatalytic Hydrogen Generation in the Presence of Chloroacetic Acids over Pt/TiO2.” Chemosphere. vol. 63, pp. 1312-1318.
Panagiotopoulou, Paraskevi, and Dimitris I. Kondarides. 2006. “Effect of the Nature of the Support on the Catalytic Performance of Noble Metal Catalysts for the Water-Gas Shift Reaction.” Catalysis Today. vol. 112, pp. 49-52.
Park, Hyunwoong, Jaesang Lee, and Wonyong Choi. 2006. “Study of Special Cases Where the Enhanced Photocatalytic Activities of Pt/TiO2 Vanish Under Low Light Intensity.” Catalysis Today. vol. 111, pp. 259-265.
Sato, Yasushi, Makiko Koizumi, Toshihiro Miyao, and Shuichi Naito. 2006. “The CO-H2 and CO-H2O Reactions over TiO2 Nanotubes Filled with Pt Metal Nanoparticles.” Catalysis Today. vol. 111, pp. 164-170.
Sreethawong, Thammanoon, and Susumu Yoshikawa. 2006. “Enhanced Photocatalytic Hydrogen Evolution over Pt Supported on Mesoporous TiO2 Prepared by Single-Step Sol-Gel Process with Surfactant Template.” International Journal of Hydrogen Energy. vol. 31, pp. 786-796.
Alexeev, Oleg S., Soo Yin Chin, Mark H. Engelhard, Lorna Ortiz-Soto, and Michael D. Amiridis. 2005. “Effects of Reduction Temperature and Metal-Support Interactions on the Catalytic Activity of Pt/γ-Al2O3 and Pt/TiO2 for the Oxidation of CO in the Presence and Absence of H2.” J. Phys. Chem. B. vol. 109, No. 49, pp. 23430-23443.
Lee, Jaesang, and Wonyong Choi. 2005. “Photocatalytic Reactivity of Surface Platinized TiO2: Substrate Specificity and the Effect of Pt Oxidation State.” J. Phys. Chem. B. vol. 109, No. 15, pp. 7399-7406.
Liu, Zhaolin, Bing Guo, Liang Hong, and Huixin Jiang. 2005. “Physicochemical and Photocatalytic Characterizations of TiO2/Pt Nanocomposites.” Journal of Photochemistry and Photobiology A: Chemistry. vol. 172, pp. 81-88.
Teoh, Wey Yang, Lutz Mädler, Donia Beydoun, Sotiris E. Pratsinis, and Rose Amal. 2005. “Direct (One-Step) Synthesis of TiO2 and Pt/TiO2 Nanoparticles for Photocatalytic Mineralisation of Sucrose.” Chemical Engineering Science. vol. 60, pp. 5852-5861.
Wang, Xinchen, Jimmy C. Yu, Ho Yin Yip, Ling Wu, Po Keung Wong, and Suk Yin Lai. 2005. “A Mesoporous Pt/TiO2 Nanoarchitecture with Catalytic and Photocatalytic Functions.” Chem. Eur. J. vol. 11, pp. 2997-3004.
Koinuma, Hideomi, and Ichiro Takeuchi. Jul. 2004. “Combinatorial Solid-State Chemistry of Inorganic Materials.” Nature Materials. vol. 3, pp. 429-438.
Simmons, Blake A., Glen C. Irvin, Vivek Agarwal, Arijit Bose, Vijay T. John, Gary L. McPherson, and Nitash P. Balsara. 2002. “Small Angle Neutron Scattering Study of Microstructural Transitions in a Surfactant-Based Gel Mesophase.” Langmuir. vol. 18, No. 3, pp. 624-632.
Subramanian, G., Vinothan N. Manoharan, James D. Thorne, and David J. Pine. 1999. “Ordered Macroporous Materials by Colloidal Assembly: A Possible Route to Photonic Bandgap Materials.” Advanced Materials. vol. 11, No. 15, pp. 1261-1265.
Tauster, S. J., S. C. Fung, and R. L. Garten. Jan. 4, 1978. “Strong Metal-Support Interactions. Group 8 Noble Metals Supported on TiO2.” Journal of the American Chemical Society. vol. 100, No. 1, pp. 170-175.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Nanocomposite support materials does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nanocomposite support materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nanocomposite support materials will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2729251

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.