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| Porous carbon | |
|---|---|
| Name | Porous carbon |
| Density | 0.2–1.6 g·cm−3 |
| Applications | Energy storage; catalysis; adsorption; filtration |
Porous carbon Porous carbon is a class of carbonaceous materials characterized by interconnected voids and extended surface area, used across Bell Labs, MIT, Max Planck Society, Imperial College London, and Lawrence Berkeley National Laboratory research programs. Early studies at DuPont and BASF informed industrial activation processes later commercialized by Carbonyx and Cabot Corporation, while contemporary advances link to projects at Stanford University, Harvard University, ETH Zurich, Tsinghua University, and Oak Ridge National Laboratory.
Porous carbon encompasses activated carbons, carbon aerogels, carbon nanotube networks, graphene-based foams, and ordered carbons developed by entities such as Dow Chemical Company, Nippon Steel, Nissan, Toyota, and Siemens. Historically, milestones include contributions from Michael Faraday on carbon materials, foundational adsorbent work at Imperial Chemical Industries, and Nobel-associated developments connected to Andre Geim and Kostya Novoselov for graphene that influenced porous carbon research directions.
Families include activated carbon, ultramicroporous carbons, mesoporous carbons (e.g., CMK-3 from routes pioneered at University of California, Berkeley), carbon aerogels developed at Lawrence Livermore National Laboratory, carbon nanotubes linked to Rice University discoveries, and graphene foams informed by University of Manchester work. Structural motifs reference micropores (<2 nm), mesopores (2–50 nm), and macropores (>50 nm) studied in projects at Argonne National Laboratory, Brookhaven National Laboratory, and Los Alamos National Laboratory.
Precursor selection ranges from coal and coconut shell feedstocks processed by Shell Oil Company-era methods to polymer-derived carbons (phenolic resins used historically at 3M). Chemical activation agents include potassium hydroxide popularized in studies at University of Tokyo and zinc chloride used in protocols advanced at University of Cambridge. Physical activation via steam or CO2 traces roots to pilot facilities at Royal Dutch Shell and process intensification work at General Electric. Templating routes employ silica templates synthesized in collaborations among ETH Zurich, CNRS, and Max Planck Institute for Polymer Research; hard-template removal has been optimized in labs at University of California, Los Angeles and Columbia University.
Key metrics—specific surface area, pore volume, electrical conductivity, and surface chemistry—are quantified in studies from National Institute of Standards and Technology and Forschungszentrum Jülich. Surface functional groups (oxygen, nitrogen, sulfur) introduced via ammonia or the treatment regimes explored at Massachusetts Institute of Technology and University of Illinois Urbana-Champaign influence basicity/acidity relevant to catalysts used by BASF and Procter & Gamble. Thermal stability and graphitization behavior link to graphitization research originating from Carnegie Institution for Science and high-temperature work at Sandia National Laboratories.
Porous carbon is characterized using nitrogen adsorption isotherms (BET) standardized by International Organization for Standardization protocols and advanced at National Institute for Materials Science. Pore-size distributions derive from BJH and NLDFT methods developed by researchers at University of Oxford and ETH Zurich. Microscopy methods—transmission electron microscopy (TEM) and scanning electron microscopy (SEM)—are routine in facilities at European Synchrotron Radiation Facility and Diamond Light Source. X-ray diffraction and Raman spectroscopy trace lineage to instrumentation advances at Brookhaven National Laboratory and Paul Scherrer Institute, while X-ray photoelectron spectroscopy workflows are common across Argonne National Laboratory and Lawrence Livermore National Laboratory.
Energy storage uses porous carbon in supercapacitors and battery electrodes deployed by Tesla, Inc. research teams and in projects at Panasonic Corporation and LG Chem. Gas adsorption and separation for CO2 capture have been piloted with partnerships involving ExxonMobil, Shell, and TotalEnergies, while water purification systems integrating activated carbon have been commercialized by P&G and implemented in humanitarian programs by UNICEF and World Health Organization initiatives. Heterogeneous catalysis platforms pair porous carbon supports with metals studied at Johnson Matthey and BASF, and environmental remediation trials have engaged EPA projects and USDA-funded work on soil amendment. Emerging roles include electrode substrates in fuel cells developed by Toyota Motor Corporation and Ballard Power Systems and sorbents in gas masks informed by military research at DARPA and U.S. Army Research Laboratory.
Feedstock sourcing debates reference mining operations near Appalachia and agricultural residues used in projects supported by United Nations Environment Programme. Lifecycle analyses conducted at OECD-affiliated centers and sustainability assessments at European Commission labs address carbon footprint, regeneration energy, and end-of-life disposal. Occupational exposure limits and handling guidance draw on standards from Occupational Safety and Health Administration and National Institute for Occupational Safety and Health, while toxicity studies have been published through collaborations among World Health Organization, European Chemicals Agency, and medical centers such as Mayo Clinic and Johns Hopkins University.
Category:Carbon materials