HIROKI NAGASAWA

Last Updated :2022/08/02

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
Web Site
E-mail
nagasawahiroshima-u.ac.jp
Other Contact Details
1-4-1,Kagamiyama,Higashi-Hiroshima, Japan
TEL : (+81)82-424-7719 FAX : (+81)
Self-introduction
Development of functional thin films via plasma processing and their applications.

Basic Information

Major Professional Backgrounds

  • 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Assistant Professor
  • 2017/04/01, 2020/03/31, Hiroshima University, Graduate School of Engineering, Assistant Professor
  • 2012/04/01, 2017/03/31, Hiroshima University, Institute of Engineering, Assistant Professor (Special Appointment)
  • 2010/04, 2012/03, Japan Society for the Promotion of Science

Educational Backgrounds

  • The University of Tokyo, Graduate School of Frontier Sciences, Departoment of Environment Systems, Japan, 2012/03/31
  • The University of Tokyo, Japan, 2007/04, 2009/03
  • The University of Tokyo, Japan, 2003/04, 2007/03

Academic Degrees

  • Doctor of Philosophy, The University of Tokyo
  • Master of Engineering, The University of Tokyo

In Charge of Primary Major Programs

  • Chemical Engineering

Research Fields

  • Engineering;Process / Chemical engineering;Properties in chemical engineering process / Transfer operation / Unit operation

Research Keywords

  • Membrane separation
  • Atmospheric-pressure plasma
  • Plasma-enhanced chemical vapor deposition
  • Silica Membrane
  • Functional thin film
  • Molecular sieving

Affiliated Academic Societies

  • The Society of Chemical Engineers, Japan
  • The Membrane Society of Japan
  • American Institute of Chemical Engineering
  • The Japan Society of Applied Physics

Educational Activity

Course in Charge

  1. 2022, Undergraduate Education, 2Term, Introduction to Applied Chemistry, Chemical Engineering and Biotechnology
  2. 2022, Undergraduate Education, Second Semester, Experimental Chemical Engineering
  3. 2022, Undergraduate Education, Second Semester, Chemical Engineering Exercise I
  4. 2022, Graduate Education (Master's Program) , 3Term, Special Exercises on Chemical Engineering B
  5. 2022, Graduate Education (Master's Program) , 4Term, Special Exercises on Chemical Engineering B
  6. 2022, Graduate Education (Master's Program) , Academic Year, Special Study on Chemical Engineering

Research Activities

Academic Papers

  1. Characterization and gas permeation properties of amorphous silica membranes prepared via plasma enhanced chemical vapor deposition, JOURNAL OF MEMBRANE SCIENCE, 441, 45-53, 20130815
  2. Pore size control of Al-doping into bis (triethoxysilyl) methane (BTESM)-derived membranes for improved gas permeation properties, RSC ADVANCES, 3(30), 12080-12083, 2013
  3. Graphene nanosheets supporting Ru nanoparticles with controlled nanoarchitectures form a high-performance catalyst for COx-free hydrogen production from ammonia, JOURNAL OF MATERIALS CHEMISTRY A, 2(24), 9185-9192, 2014
  4. Molecular dynamics simulation study on characterization of bis(triethoxysilyl)-ethane and bis(triethoxysilyl)ethylene derived silica-based membranes, DESALINATION AND WATER TREATMENT, 51(25-27), 5248-5253, 20130701
  5. Multilayered polyamide membranes by spray-assisted 2-step interfacial polymerization for increased performance of trimesoyl chloride (TMC)/m-phenylenediamine (MPD)-derived polyamide membranes, JOURNAL OF MEMBRANE SCIENCE, 446, 504-512, 20131101
  6. Sol-gel spin coating process to fabricate a new type of uniform and thin organosilica coating on polysulfone film, MATERIALS LETTERS, 109, 130-133, 20131015
  7. Micropore Filling Phase Permeation of a Condensable Vapor in Silica Membranes: A Molecular Dynamics Study, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 46(10), 659-671, 2013
  8. Preparation of BTESE-derived organosilica membranes for catalytic membrane reactors of methylcyclohexane dehydrogenation, JOURNAL OF MEMBRANE SCIENCE, 455, 375-383, 20140401
  9. High-temperature stability of PECVD-derived organosilica membranes deposited on TiO2 and SiO2-ZrO2 intermediate layers using HMDSO/Ar plasma, SEPARATION AND PURIFICATION TECHNOLOGY, 121, 13-19, 20140114
  10. A closer look at the development and performance of organic-inorganic membranes using 2,4,6-tris-[3(triethoxysilyl)-1-propoxyl]-1,3,5-triazine (TTESPT), RSC ADVANCES, 4(24), 12404-12407, 2014
  11. Development and gas permeation properties of microporous amorphous TiO2-ZrO2-organic composite membranes using chelating ligands, JOURNAL OF MEMBRANE SCIENCE, 461, 96-105, 20140701
  12. CO2 Permeation through Hybrid Organosilica Membranes in the Presence of Water Vapor, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 53(14), 6113-6120, 20140409
  13. A CO2 fixation process with waste cement powder via regeneration of alkali and acid by electrodialysis, RSC ADVANCES, 4(38), 19778-19788, 2014
  14. Fabrication of a layered hybrid membrane using an organosilica separation layer on a porous polysulfone support, and the application to vapor permeation, JOURNAL OF MEMBRANE SCIENCE, 464, 140-148, 20140815
  15. Insight into the pore tuning of triazine-based nitrogen-rich organoalkoxysilane membranes for use in water desalination, RSC ADVANCES, 4(45), 23759-23769, 2014
  16. Gas permeation properties through Al-doped organosilica membranes with controlled network size, JOURNAL OF MEMBRANE SCIENCE, 466, 246-252, 20140915
  17. Experimental and Theoretical Study on Small Gas Permeation Properties through Amorphous Silica Membranes Fabricated at Different Temperatures, JOURNAL OF PHYSICAL CHEMISTRY C, 118(35), 20323-20331, 20140904
  18. Synthesis and characterization of a layered-hybrid membrane consisting of an organosilica separation layer on a polymeric nanofiltration membrane, JOURNAL OF MEMBRANE SCIENCE, 472, 19-28, 20141215
  19. ★, Modified Gas-Translation Model for Prediction of Gas Permeation Through Microporous Organosilica Membranes, AICHE JOURNAL, 60(12), 4199-4210, 201412
  20. Preparation and gas permeation properties of thermally stable organosilica membranes derived by hydrosilylation, JOURNAL OF MATERIALS CHEMISTRY A, 2(3), 672-680, 2014
  21. Tuning the pore sizes of novel silica membranes for improved gas permeation properties via an in situ reaction between NH3 and Si-H groups, CHEMICAL COMMUNICATIONS, 51(13), 2551-2554, 2015
  22. Methylcyclohexane dehydrogenation for hydrogen production via a bimodal catalytic membrane reactor, AICHE JOURNAL, 61(5), 1628-1638, 201512
  23. Microporous organosilica membranes for gas separation prepared via PECVD using different O/Si ratio precursors, JOURNAL OF MEMBRANE SCIENCE, 489, 11-19, 20150901
  24. Photo-induced sol-gel processing for low-temperature fabrication of high-performance silsesquioxane membranes for use in molecular separation, CHEMICAL COMMUNICATIONS, 51(49), 9932-9935, 2015
  25. Plasma treatment of hydrophobic sub-layers to prepare uniform multi-layered films and high-performance gas separation membranes, APPLIED SURFACE SCIENCE, 349, 415-419, 20150915
  26. Pore-size evaluation and gas transport behaviors of microporous membranes: An experimental and theoretical study, AICHE JOURNAL, 61(7), 2268-2279, 201507
  27. CO2 Fixation Process with Waste Cement Powder via Regeneration of Alkali and Acid by Electrodialysis: Effect of Operation Conditions, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 54(25), 6569-6577, 20150701
  28. Plasma-assisted multi-layered coating towards improved gas permeation properties for organosilica membranes, RSC ADVANCES, 5(74), 59837-59844, 2015
  29. Robust organosilica membranes for high temperature reverse osmosis (RO) application: Membrane preparation, separation characteristics of solutes and membrane regeneration, JOURNAL OF MEMBRANE SCIENCE, 493, 515-523, 20151101
  30. Evaluating the gas permeation properties and hydrothermal stability of organosilica membranes under different hydrosilylation conditions, JOURNAL OF MEMBRANE SCIENCE, 493, 664-672, 20151101
  31. Reverse osmosis performance of layered-hybrid membranes consisting of an organosilica separation layer on polymer supports, JOURNAL OF MEMBRANE SCIENCE, 494, 104-112, 20151115
  32. Preparation of organosilica membranes on hydrophobic intermediate layers and evaluation of gas permeation in the presence of water vapor, JOURNAL OF MEMBRANE SCIENCE, 496, 156-164, 20151215
  33. Effect of firing temperature on the water permeability of SiO2-ZrO2 membranes for nanofiltration, JOURNAL OF MEMBRANE SCIENCE, 497, 348-356, 20160101
  34. Pervaporation and vapor permeation characteristics of BTESE-derived organosilica membranes and their long-term stability in a high-water-content IPA/water mixture, JOURNAL OF MEMBRANE SCIENCE, 498, 336-344, 20160115
  35. Network engineering of a BTESE membrane for improved gas performance via a novel pH-swing method, JOURNAL OF MEMBRANE SCIENCE, 511, 219-227, 20160801
  36. Tailoring the Separation Behavior of Polymer-Supported Organosilica Layered-Hybrid Membranes via Facile Post-Treatment Using HCl and HN3 Vapors, ACS APPLIED MATERIALS & INTERFACES, 8(17), 11060-11069, 20161204
  37. Nanofiltration performance of SiO2-ZrO2 membranes in aqueous solutions at high temperatures, SEPARATION AND PURIFICATION TECHNOLOGY, 168, 238-247, 20160810
  38. Plasma-enhanced chemical vapor deposition of amorphous carbon molecular sieve membranes for gas separation, RSC ADVANCES, 6(64), 59045-59049, 2016
  39. Propylene/propane Permeation Properties of Metal-doped Organosilica Membranes with Controlled Network Sizes and Adsorptive Properties, JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, 59(4), 140-148, 201607
  40. Tailoring the Subnano Silica Structure via Fluorine Doping for Development of Highly Permeable CO2 Separation Membranes, CHEMNANOMAT, 2(4), 264-267, 201604
  41. Evaluation of non-commercial ceramic SiO2-ZrO2 and organosilica BTESE membranes in a highly oxidative medium: Performance in hydrogen peroxide, JOURNAL OF MEMBRANE SCIENCE, 520, 740-748, 20161215
  42. ★, Atmospheric-pressure plasma-enhanced chemical vapor deposition of microporous silica membranes for gas separation, JOURNAL OF MEMBRANE SCIENCE, 524, 644-651, 20170215
  43. SiO2-ZrO2 nanofiltration membranes of different Si/Zr molar ratios: Stability in hot water and acid/alkaline solutions, JOURNAL OF MEMBRANE SCIENCE, 524, 700-711, 20170215
  44. Pore size tuning of sol-gel-derived triethoxysilane (TRIES) membranes for gas separation, JOURNAL OF MEMBRANE SCIENCE, 524, 64-72, 20170215
  45. Photo-induced sol-gel synthesis of polymer-supported silsesquioxane membranes, RSC ADVANCES, 7(12), 7150-7157, 2017
  46. Organosilica bis(triethoxysilyl)ethane (BTESE) membranes for gas permeation (GS) and reverse osmosis (RO): The effect of preparation conditions on structure, and the correlation between gas and liquid permeation properties, JOURNAL OF MEMBRANE SCIENCE, 526, 242-251, 20170315
  47. Fabrication and Microstructure Tuning of a Pyrimidine-Bridged Organoalkoxysilane Membrane for CO2 Separation, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 56(5), 1316-1326, 20170208
  48. Pyrimidine-bridged organoalkoxysilane membrane for high-efficiency CO2 transport via mild affinity, SEPARATION AND PURIFICATION TECHNOLOGY, 178, 232-241, 20171207
  49. Development and permeation properties of SiO2-ZrO2 nanofiltration membranes with a MWCO of < 200, JOURNAL OF MEMBRANE SCIENCE, 535, 331-341, 20170801
  50. Preparation of cyclic peptide nanotube structures and molecular simulation of water adsorption and diffusion, JOURNAL OF MEMBRANE SCIENCE, 537, 101-110, 20170901
  51. Preparation and Gas Permeation Properties of Fluorine-Silica Membranes with Controlled Amorphous Silica Structures: Effect of Fluorine Source and Calcination Temperature on Network Size, ACS APPLIED MATERIALS & INTERFACES, 9(29), 24625-24633, 20170726
  52. Fabrication and CO2 permeation properties of amine-silica membranes using a variety of amine types, JOURNAL OF MEMBRANE SCIENCE, 541, 447-456, 20171101
  53. Gas permeation properties for organosilica membranes with different Si/C ratios and evaluation of microporous structures, AICHE JOURNAL, 63(10), 4491-4498, 201710
  54. Preliminary techno-economic analysis of non-commercial ceramic and organosilica membranes for hydrogen peroxide ultrapurification, CHEMICAL ENGINEERING RESEARCH & DESIGN, 125, 385-397, 201709
  55. Fluorine-induced microporous silica membranes: Dramatic improvement in hydrothermal stability and pore size controllability for highly permeable propylene/propane separation, JOURNAL OF MEMBRANE SCIENCE, 549, 111-119, 20180301
  56. Bis(triethoxysilyl)ethane (BTESE)-derived silica membranes: pore formation mechanism and gas permeation properties, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 86(1), 63-72, 201804
  57. Enhanced CO2 Separation Performance for Tertiary Amine-Silica Membranes via Thermally Induced Local Liberation of CH3Cl, AICHE JOURNAL, 64(5), 1528-1539, 201812
  58. Facile and Scalable Flow-Induced Deposition of Organosilica on Porous Polymer Supports for Reverse Osmosis Desalination, ACS APPLIED MATERIALS & INTERFACES, 10(16), 14070-14078, 20180425
  59. Acid post-treatment of sol-gel-derived ethylene-bridged organosilica membranes and their filtration performances, JOURNAL OF MEMBRANE SCIENCE, 556, 196-202, 20180615
  60. Tailoring a Thermally Stable Amorphous SiOC Structure for the Separation of Large Molecules: The Effect of Calcination Temperature on SiOC Structures and Gas Permeation Properties, ACS OMEGA, 3(6), 6369-6377, 201806
  61. Atmospheric-pressure plasma-enhanced chemical vapor deposition of UV-shielding TiO2 coatings on transparent plastics, MATERIALS LETTERS, 228, 479-481, 20181001
  62. Fluorine Doping of Microporous Organosilica Membranes for Pore Size Control and Enhanced Hydrophobic Properties, ACS OMEGA, 3(8), 8612-8620, 201808
  63. Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures, JOURNAL OF MEMBRANE SCIENCE, 564, 691-699, 20181015
  64. Role of Amine Type in CO2 Separation Performance within Amine Functionalized Silica/Organosilica Membranes: A Review, APPLIED SCIENCES-BASEL, 8(7), 201807
  65. Pervaporation dehydration of aqueous solutions of various types of molecules via organosilica membranes: Effect of membrane pore sizes and molecular sizes, SEPARATION AND PURIFICATION TECHNOLOGY, 207, 108-115, 20181222
  66. Improved thermal and oxidation stability of bis( triethoxysilyl) ethane ( BTESE)- derived membranes, and their gas- permeation properties, JOURNAL OF MATERIALS CHEMISTRY A, 6(46), 23378-23387, 20181214
  67. ★, Atmospheric-Pressure Plasma-Enhanced Chemical Vapor Deposition of Hybrid Silica Membranes, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 51(9), 732-739, 201809
  68. UV-Protective TiO2 Thin Films with High Transparency in Visible Light Region Fabricated via Atmospheric-Pressure Plasma-Enhanced Chemical Vapor Deposition, ACS APPLIED MATERIALS & INTERFACES, 10(49), 42657-42665, 20181212
  69. Hydrothermal stability and permeation properties of TiO2-ZrO2 (5/5) nanofiltration membranes at high temperatures, SEPARATION AND PURIFICATION TECHNOLOGY, 212, 1001-1012, 20190401
  70. Tailoring Ultramicroporosity To Maximize CO2 Transport within Pyrimidine-Bridged Organosilica Membranes, ACS APPLIED MATERIALS & INTERFACES, 11(7), 7164-7173, 20190220
  71. Effects of Calcination Condition on the Network Structure of Triethoxysilane (TRIES) and How Si-H Groups Influence Hydrophobicity Under Hydrothermal Conditions, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 58(9), 3867-3875, 20190306
  72. Molecular dynamics simulation study on the mechanisms of liquid-phase permeation in nanopores, SEPARATION AND PURIFICATION TECHNOLOGY, 220, 259-267, 20190801
  73. Tailoring the molecular sieving properties and thermal stability of carbonized membranes containing polyhedral oligomeric silsesquioxane (POSS)-polyimide via the introduction of norbornene, JOURNAL OF MEMBRANE SCIENCE, 582, 59-69, 20190715
  74. Tailoring the microstructure and permeation properties of bridged organosilica membranes via control of the bond angles, JOURNAL OF MEMBRANE SCIENCE, 584, 56-65, 20190815
  75. Free glycerol removal from monoglyceride using TiO2-ZrO2 nanofiltration membranes, SEPARATION AND PURIFICATION TECHNOLOGY, 224, 366-372, 20191001
  76. Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures, JOURNAL OF MEMBRANE SCIENCE, 589, 20191101
  77. Infrared-spectroscopic porosimetry: Development and application for characterization of hundred-nanometer-thick porous thin films, THIN SOLID FILMS, 685, 299-305, 20190901
  78. Vapor-permeation dehydration of isopropanol using a flexible and thin organosilica membrane with high permeance, JOURNAL OF MEMBRANE SCIENCE, 588, 20191015
  79. TiO2-ZrO2 membranes of controlled pore sizes with different Ti/Zr ratios for nanofiltration, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 92(1), 12-24, 201910
  80. Evaluating the chemical stability of metal oxides in SO3 and applications of SiO2-based membranes to O-2/SO3 separation, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 102(11), 6946-6956, 201911
  81. Ceramic-Supported Polyhedral Oligomeric Silsesquioxane-Organosilica Nanocomposite Membrane for Efficient Gas Separation, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 58(47), 21708-21716, 20191127
  82. Phase inversion/sintering-induced porous ceramic microsheet membranes for high-quality separation of oily wastewater, JOURNAL OF MEMBRANE SCIENCE, 595, 20200201
  83. Effect of Sintering Temperature on Sol-Gel Synthesis of Porous Polymeric Membrane Supported Layered Hybrid Organosilica Membranes and Their Vapor Permeation Property, KAGAKU KOGAKU RONBUNSHU, 45(5), 177-183, 2019
  84. Energy-efficient separation of organic liquids using organosilica membranes via a reverse osmosis route, JOURNAL OF MEMBRANE SCIENCE, 597, 20200301
  85. Development of high-performance sub-nanoporous SiC-based membranes derived from polytitanocarbosilane, JOURNAL OF MEMBRANE SCIENCE, 598, 20200315
  86. Development of an acetylacetonate-modified silica-zirconia composite membrane applicable to gas separation, JOURNAL OF MEMBRANE SCIENCE, 599, 20200401
  87. Chemical-free cleaning of fouled reverse osmosis (RO) membranes derived from bis(triethoxysilyl)ethane (BTESE), JOURNAL OF MEMBRANE SCIENCE, 601, 20200301
  88. Pore size tuning of bis(triethoxysilyl)propane (BTESP)-derived membrane for gas separation: Effects of the acid molar ratio in the sol and of the calcination temperature, SEPARATION AND PURIFICATION TECHNOLOGY, 242, 20200701
  89. Pore subnano-environment engineering of organosilica membranes for highly selective propylene/propane separation, JOURNAL OF MEMBRANE SCIENCE, 603, 20200515
  90. Fine-tuned, molecular-composite, organosilica membranes for highly efficient propylene/propane separation via suitable pore size, AICHE JOURNAL, 66(4), 202004
  91. Tuning the microstructure of polycarbosilane-derived SiC(O) separation membranes via thermal-oxidative cross-linking, SEPARATION AND PURIFICATION TECHNOLOGY, 248, 20201001
  92. High-performance molecular-separation ceramic membranes derived from oxidative cross-linked polytitanocarbosilane, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 103(8), 4473-4488, 202008
  93. Evaluation of experimentally obtained permeance based on module simulation: How should permeance be evaluated?, AICHE JOURNAL, 66(7), 202007
  94. Pervaporation removal of methanol from methanol/organic azeotropes using organosilica membranes: Experimental and modeling, JOURNAL OF MEMBRANE SCIENCE, 610, 20200901
  95. Filtration of surfactant-stabilized oil-in-water emulsions with porous ceramic membranes: Effects of membrane pore size and surface charge on fouling behavior, JOURNAL OF MEMBRANE SCIENCE, 610, 20200901
  96. Experimental study and modeling of organic solvent reverse osmosis separations through organosilica membranes, AICHE JOURNAL, 66(9), 202009
  97. Amino-decorated organosilica membranes for highly permeable CO2 capture, JOURNAL OF MEMBRANE SCIENCE, 611, 20201001
  98. Al2O3 nanofiltration membranes fabricated from nanofiber sols: Preparation, characterization, and performance, JOURNAL OF MEMBRANE SCIENCE, 611, 20201001
  99. A carbon-silica-zirconia ceramic membrane with CO2 flow-switching behaviour promising versatile high-temperature H-2/CO2 separation, JOURNAL OF MATERIALS CHEMISTRY A, 8(44), 23563-23573, 20201128
  100. SiC mesoporous membranes for sulfuric acid decomposition at high temperatures in the iodine-sulfur process, RSC ADVANCES, 10(68), 41883-41890, 20201117
  101. Hydrocarbon permeation properties through microporous fluorine-doped organosilica membranes with controlled pore sizes, JOURNAL OF MEMBRANE SCIENCE, 619, 20210201
  102. Improved performance of organosilica membranes for steam recovery at moderate-to-high temperatures via the use of a hydrothermally stable intermediate layer, JOURNAL OF MEMBRANE SCIENCE, 620, 20210215
  103. Correlation Between Ammonia Selectivity and Temperature Dependent Functional Group Tuning of GO, IEEE TRANSACTIONS ON NANOTECHNOLOGY, 20, 129-136, 2021
  104. ★, Ultrafast Synthesis of Silica-Based Molecular Sieve Membranes in Dielectric Barrier Discharge at Low Temperature and Atmospheric Pressure, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 143(1), 35-40, 20210113
  105. TiO2 Coatings Via Atmospheric-Pressure Plasma-Enhanced Chemical Vapor Deposition for Enhancing the UV-Resistant Properties of Transparent Plastics, ACS OMEGA, 6(2), 1370-1377, 20210119
  106. Design of a SiOC network structure with oxidation stability and application to hydrogen separation membranes at high temperatures, JOURNAL OF MEMBRANE SCIENCE, 625, 20210501
  107. Metal-induced microporous aminosilica creates a highly permeable gas-separation membrane, MATERIALS CHEMISTRY FRONTIERS, 5(7), 20210407

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2013, 2014
  2. KAKENHI, 2015, 2017
  3. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2018, 2020