个人简介

B.S., Brigham Young University (1986) M.S., Brigham Young University (1988) Ph.D., University of California at Berkeley (1995) NRC Postdoctoral Fellow, Naval Research Laboratory (1995-1996) Associate Professor of Science, Southern Virginia College (1996-1997)

研究领域

Physical Chemistry

Research Interests The study of superconducting, magnetic, nanocrystalline, or other technologically important materials using specific-heat measurements from as low as 0.5 K to 400 K. Current research projects are funded by the Department of Energy, National Science Foundation, and various private companies. The current research focus also includes the synthesis and characterization of a wide variety of alumina and titania catalyst supports and Fischer-Tropsch catalysts. Founder of Cosmas, Inc., a new startup company focused on the production of a wide variety of metal oxide and mixed metal oxide nanoparticles. Teaching Interests The use of computer simulations of instructional laboratory experiences in introductory chemistry curricula. Creator and Project Director for Y Science Laboratories: A set of realistic and sophisticated simulations covering General Chemistry, Organic Chemistry, Physics, Physical Science, and now Biology. Funded in part by the Department of Education. These laboratory simulations are licensed to and distributed by Pearson Education for worldwide distribution. Current usage is approximately 1,000,000 students per year. Visit http://yscience.byu.edu for details. Chemical Thermodynamics While commercial specific heat apparatuses using relaxation methods exist, our custom designed and built instruments are capable of accuracies and precisions approaching, and even exceeding, 0.1%. This type of accuracy and precision allows us to study a wide range of interesting and relevant topics in solid-state physics and chemical thermodynamics. Some of the topics we have studied in the past include (1) the thermodynamic stability of nuclear waste materials, (2) zeolites, (3) negative thermal expansion materials and low energy vibrational modes, (4) frustrated magnets, (5) iron oxides and oxyhydroxides, (6) uranium metal, and (7) neutron detector materials. Shown below is an example of our measurements on a bulk sample of MnO and a sample of the collosal magnetoresister La1-xSrxMnO3. Currently, our primary research interest is in the Energetics of Nanomaterials, which is funded by the Department of Energy. Our focus in this research project is to understand the fundamental driving forces governing the stability of materials as their particle sizes reach the nanoscale. We have done extensive work on high quality samples of the TiO2 polymorphs of anatase and rutile with sizes of 7 nm and on the magnetic material CoO. More information can be found in our papers given in the publication list. Synthesis of Nanoparticles As part of our nanoscale project, we have recently developed an elegantly simple process that allows us to make a nearly unlimited array of well-defined inorganic nanoparticles that have controlled sizes from 1 nm to bulk. The particles are highly crystalline with well defined shapes (usually spherical but also rods), we can synthesize them with chemical and phase purities as high as 99.9999%, we can control the particle size distribution to approximately ±10%, we project with confidence that we can make industrial size quantities with manufacturing costs significantly less than any other current technique. The types of particles we can make are, in general, metal oxides, but the process allows us to control the oxidation state so we can make high, medium, and low oxidation state oxides and metals. We can make oxides of all of the transition metals, lanthanides, and actinides, AND any stoichiometric combination of any number of these metals. We can include group I and group II metals in combination with the transition metals. Consequently, we have the ability to make an almost innumerable array of nanomaterials (single metal and multi-metal) with well-controlled physical properties, purity, oxidation state, size and size distribution using a process that is fast, reliable, and inexpensive. Table 1 gives examples of some of the materials we have synthesized, and below are some representative TEM images for NiO, Y2O3, and CoO powders. TEM image of 8 nm Co0. Magnetic properties are equivalent to bulk materials. Bar 50 nm. High resolution TEM image of 13 nm Y2O3. Notice the rods are crystalline to the edge. Bar 10 nm TEM image of 3 nm NiO powders. Bar 5 nm. Fisher-Tropsch Catalysis Beginning several years ago, we have also created a Fisher Tropsch research focus in collaboration with the Catalysis Group in Chemical Engineering. We have applied our proprietary solvent deficient precipitation method to synthesize a series of industrial viable and state of the art alumina catalyst supports and Fe and Co Fisher Tropsch catalysts. These supports and catalysts have tunable properties and perform better than any catalysts currently reported in the literature. We continue to focus our work on innovating in the catalysis area using our proprietary solent deficient method.

近期论文

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J. Webb, R. Swan, and B.F. Woodfield, "Computer-based Laboratory Simulations for the New. Digital Learning Environments", in Science Online and at a Distance, edited by D. Kennepohl. (Stylus Publishing, Sterling, VA, 2015).. Y. Zhang, Q. Shi, J.M. Schliesser, B.F. Woodfield, and Z. Nan, "Synthesis of nanosized Zn. ferrite with normal spinal structure by a facile method", Inorg. Chem. 53, 10463-10470 (2014).. J.L. Smith, B. Huang, S. Liu, Q. Liu, R.E. Olsen, J. Boerio-Goates, and B.F. Woodfield,. “Synthesis of metal oxide nanoparticles via a robust “solvent-deficient” method”, Accepted in . Nanoscale (2014).. Q. Shi, T.J. Park, J. Schliesser, A. Navrotsky, and B.F. Woodfield, "Low Temperature Heat. Capacity Study of Ba TiSi O and Sr TiSi O ", Journal of Chemical Thermodynamics 72, 77-84. 2 2 8 2 2 8. (2014).. J.M. Schliesser and B.F. Woodfield, "Quantification of oxygen vacancies in metal oxide. insulators using the linear term from the low-temperature specific heat ", Submitted to Physical. Review B (2014).. J.M. Schliesser, S.J. Smith, G. Li, L. Li, T.F. Walker, T. Perry, J. Boerio-Goates, and B.F.. Woodfield, "Heat Capacity and Thermodynamic Functions of nano-TiO2 Rutile in Relation to. bulk-TiO2 Rutile", Journal of Chemical Thermodynamics 81, 311-322 (2015).. J.M. Schliesser, S.J. Smith, G. Li, L. Li, T.F. Walker, T. Perry, J. Boerio-Goates, and B.F.. Woodfield, "Heat Capacity and Thermodynamic Functions of nano-TiO2 Anatase in Relation to. bulk-TiO2 Anatase", Journal of Chemical Thermodynamics 81, 298-310 (2015).. R.E. Olsen, C.H. Barthalemew, B. Huang, C.L. Simmons, and B.F. Woodfield, "Synthesis and. characterization of pure and stabilized mesoporous anatase titanias", Microporous Mesoporous. Mater. 184, 7-14 (2014).. R.E. Olsen, C.H. Barthalemew, D.B. Enfield, and B.F. Woodfield, "One-pot synthesis of Pt. catalysts supported on Al-modified TiO ", Bull. Chem. React. Eng. Catal. 9, 156-167 (2014).. 2. R.E. Olsen, C.H. Barthalemew, D.B. Enfield, J.S. Lawson, N. Rohbock, B.S. Scott, and B.F.. Woodfield, "Optimizing the synthesis and properties of Al-modified anatase catalyst supports by. statistical experimental design", Journal of Porous Materials 21, 827-837 (2014).. R.E. Olsen, T.M. Alam, C.H. Barthalemew, D.B. Enfield, J. Schliesser, and B.F.. Woodfield, "Structure analysis of Al-modified TiO2 nano catalyst supports", Journal of. Physical Chemistry C 118, 9176–9186 (2014).. M.K. Mardkhe, B.F. Woodfield, C.H. Bartholomew, and B. Huang, “Novel, thermally stable Si . doped alumina catalyst supports”, U.S. Patent Application (2014).. M.K. Mardkhe, K. Keyvanloo, C.H. Bartholomew, W.C. Hecker, T.M. Alam, and B.F.. Woodfield, "Acid Site Properties of Thermally Stable, Silica-Doped Alumina as a Function of. Silica/Alumina Ratio and Calcination Temperature", Appl. Catal. A 482, 16-23 (2014).. J. Majzlan, A.H. Zittlau, K.-D. Grevel, J.M. Schliesser, B.F. Woodfield, E. Dachs, M. Stevko, J.. Plasil, M. Chovan, J. Sejkora, and S. Milovska, "Thermodynamic properties and phase. equilibria of the secondary copper minerals libethenite, olivenite, pseudomalachite, kröhnkite,. cyanochroite, and devilline", Submitted to Canada Miner. (2014).. M. Khosravi, J.S. Lawson, B. Huang, E.D. Handly, and B.F. Woodfield, "A Statistical Approach. to Control Porosity and Surface Area in Silica-Doped Alumina Supports", Submitted to. Microporous Mesoporous Mater. (2014).. M. Khosravi, B. Huang, C.H. Bartholomew, T.M. Alam, and B.F. Woodfield, "The Origin of. Increased Thermal Stability for Si Doped Alumina", Submitted to Microporous Mesoporous. Mater. (2014).. K. Keyvanloo, M.K. Mardkhe, T.M. Alam, C.H. Bartholomew, B.F. Woodfield, and W.C.. Hecker, "Supported Iron Fischer-Tropsch Catalyst: Superior Activity and Stability Using a. Thermally Stable Silica-Doped Alumina Support", ACS Catalysis 4, 1071-1077 (2014).. K. Keyvanloo, W.C. Hecker, B.F. Woodfield, and C.H. Bartholomew, "Highly Active and. Stable Supported-Iron Fischer-Tropsch Catalysts: Effects of Support Properties and SiO2. stabilizer on Catalyst Performance", J. Catalysis 319, 220-231 (2014).. B. Huang, J. Schliesser, R.E. Olsen, S.J. Smith, and B.F. Woodfield, "Synthesis and. Thermodynamics of Porous Metal Oxide Nanomaterials", Curr. Inorg. Chem. 4, 40-53 (2014).. B. Huang, C. Barthalemew, and B.F. Woodfield, "Facile synthesis of mesoporous γ-alumina. with tunable pore size: the effects of water to aluminum molar ratio in hydrolysis of aluminum. alkoxides", Microporous Mesoporous Mater. 183, 37-47 (2014).