@misc{KlepelScholzScholzetal., author = {Klepel, Olaf and Scholz, Kerstin and Scholz, Jan and McQuillan, A. James and Wagner, Gerald}, title = {Partially embedded highly dispersed Pt nanoparticles in mesoporous carbon with enhanced leaching stability}, series = {Carbon}, volume = {48}, journal = {Carbon}, number = {6}, issn = {0008-6223}, pages = {1788 -- 1798}, language = {en} } @misc{GuentherKlepel, author = {G{\"u}nther, David and Klepel, Olaf}, title = {Synthese von por{\"o}sen Kohlenstoffmonolithen unter Verwendung von Porenbeton als Templat}, series = {Chemie Ingenieur Technik}, volume = {85}, journal = {Chemie Ingenieur Technik}, number = {6}, issn = {1522-2640}, pages = {955 -- 959}, language = {de} } @misc{WalterKlepelErleretal., author = {Walter, Reni and Klepel, Olaf and Erler, Thomas and Bron, Michael and Niebrzydowska, Paula and Wach, Anna and Kuśtrowski, Piotr}, title = {First steps on the way to a modular concept for the preparation of carbon based catalysts}, series = {Catalysis Letters}, volume = {143}, journal = {Catalysis Letters}, number = {7}, issn = {1572-879X}, pages = {642 -- 650}, language = {en} } @misc{TaubertBeckmannLangeetal., author = {Taubert, Michael and Beckmann, Jens and Lange, Andreas and Enke, Dirk and Klepel, Olaf}, title = {Attempts to design porous carbon monoliths using porous concrete as a template}, series = {Microporous and Mesoporous Materials}, volume = {Vol. 197}, journal = {Microporous and Mesoporous Materials}, issn = {1387-1811}, pages = {58 -- 62}, language = {en} } @misc{UtgenanntHansenKlepeletal., author = {Utgenannt, Stephan and Hansen, Felix and Klepel, Olaf and Jarczewski, Sebastian and Wach, Anna and Kuśtrowski, Piotr}, title = {Control of porosity and composition of carbon based catalysts prepared by template assisted routes}, series = {Catalysis Today}, volume = {Vol. 249}, journal = {Catalysis Today}, issn = {0920-5861}, doi = {10.1016/j.cattod.2014.10.036}, pages = {38 -- 44}, language = {en} } @misc{KlepelTaubertHeideretal., author = {Klepel, Olaf and Taubert, Michael and Heider, Robert and Erlitz, Marcel and Hille, Eva and Lange, Andreas and Enke, Dirk}, title = {Synthese von por{\"o}sen Kohlenstoffmonolithen unter Verwendung von Porenbeton als Templat. Teil II: Untersuchungen mechanischer Eigenschaften}, series = {Chemie Ingenieur Technik}, volume = {87}, journal = {Chemie Ingenieur Technik}, number = {7}, issn = {1522-2640}, doi = {10.1002/cite.201400089}, pages = {998 -- 1002}, language = {de} } @misc{KlepelErlitzScholzetal., author = {Klepel, Olaf and Erlitz, Marcel and Scholz, Kerstin and Suckow, Matthias and Taubert, Michael and Utgenannt, Stephan and Garsuch, Arnd}, title = {Template assisted synthesis of porous carbons revisited - where does the porosity come from?}, series = {Microporous and Mesoporous Materials}, journal = {Microporous and Mesoporous Materials}, number = {vol. 224}, issn = {1387-1811}, doi = {10.1016/j.micromeso.2015.11.047}, pages = {163 -- 167}, language = {en} } @misc{KlepelDannebergDraegeretal., author = {Klepel, Olaf and Danneberg, Nina and Dr{\"a}ger, Matti and Erlitz, Marcel and Taubert, Michael}, title = {Synthesis of Porous Carbon Monoliths Using Hard Templates}, series = {Materials}, volume = {9}, journal = {Materials}, number = {3}, issn = {1996-1944}, doi = {10.3390/ma9030214}, pages = {14}, language = {en} } @misc{GuentherBeckmannSchoeneichetal., author = {G{\"u}nther, David and Beckmann, Jens and Sch{\"o}neich, Michael and Schmidt, Peer and Klepel, Olaf}, title = {Porous concrete as a template for the synthesis of porous carbon materials}, series = {Carbon}, volume = {50}, journal = {Carbon}, number = {8}, issn = {0008-6223}, doi = {10.1016/j.carbon.2012.02.039}, pages = {3092 -- 3116}, abstract = {The potential of industrial porous concrete for using as a template for the synthesis of porous carbon materials has been investigated. Carbon replicas of porous concrete have been prepared by carbonization of sucrose. The pores of the resulting carbon materials range from the macropore to the micropore region, pointing to a hierarchy.}, language = {en} } @misc{KlepelDannebergSuckowetal., author = {Klepel, Olaf and Danneberg, Nina and Suckow, Matthias and Erlitz, Marcel}, title = {Carbon Replicas of Porous Concrete Obtained by Chemical Vapor Deposition - Some Aspects of the Synthesis Mechanism}, series = {Materials Sciences and Applications}, volume = {8}, journal = {Materials Sciences and Applications}, number = {8}, issn = {2153-117X}, doi = {10.4236/msa.2017.88043}, pages = {614 -- 627}, language = {en} } @misc{ReichardtUtgenanntStahmannetal., author = {Reichardt, Christina and Utgenannt, Stephan and Stahmann, Klaus-Peter and Klepel, Olaf and Barig, Susann}, title = {Highly stable adsorptive and covalent immobilization of Thermomyces lanuginosus lipase on tailor-made porous carbon material}, series = {Biochemical Engineering Journal}, journal = {Biochemical Engineering Journal}, number = {138}, issn = {1873-295X}, doi = {10.1016/j.bej.2018.07.003}, pages = {63 -- 73}, abstract = {Hierarchically structured, porous carbon materials (PCM) were synthesized by sucrose infiltration into template material and subsequent carbonization. Three porous carbon materials were prepared using porous concrete (PCM-01) or silica gel (PCM-02 and 03) as template. Carbon particles from 125 to 200 μm were generated. Surface carboxylic group density was determined with 1.1 mmol/g dry material for each variant. Firstly, tailor-made PCM was evaluated as suitable support for lipase immobilization. Recombinant produced lipase of Thermomyces lanuginosus (TLL) was used as model enzyme. Two independent crude immobilization strategies were applied. Residual activities of up to 8.6 U/g and 31 U/g dry material for adsorptive and covalent immobilization (linkage via EDC) were achieved, respectively. Additionally, TLL was immobilized on commercially available polymethacrylate support showing similar residual lipase activities. Secondly, covalent immobilization was optimized to generate reproducible, highly stable and active immobilizates. Optimized covalent immobilizates showed residual activities of up to 10 U∙g⁻¹ dry carbon material using p-nitrophenyl-palmitate assay and protein loads of up to 45 mg g⁻¹dry carbon material. Covalent bound TLL-PCM showed storage stability for 12 months, remaining 100\% of the initial activity. Operational stability resulted in stable and 100\% active immobilizates over five consecutive cycles of use. Experiments showed that tailor-made porous carbon material is a promising support for lipase immobilization, which is adaptable in shape and dimension.}, language = {en} } @misc{KlepelLangeUtgenannt, author = {Klepel, Olaf and Lange, Felix and Utgenannt, Stephan}, title = {Oxidation of sulfurous acid on carbon catalysts as a test reaction revisited: potential and limitations}, series = {Chemical engineering \& technology}, volume = {41}, journal = {Chemical engineering \& technology}, number = {10}, issn = {1521-4125}, doi = {10.1002/ceat.201800227}, pages = {2087 -- 2092}, language = {en} } @inproceedings{BarigUtgenanntHeineetal., author = {Barig, Susann and Utgenannt, Stephan and Heine, Alexander and Reichardt, Christina and Klepel, Olaf and Schnitzlein, Klaus and Stahmann, Klaus-Peter}, title = {Por{\"o}ses Kohlenstoffmaterial zur Immobilisierung von Lipase-Vergleichende Messungen mit Methacryl-Beads}, series = {Chemie Ingenieur Technik}, volume = {88}, booktitle = {Chemie Ingenieur Technik}, number = {9}, issn = {1522-2640}, doi = {10.1002/cite.201650097}, pages = {S. 1243}, abstract = {Zur Immobilisierung von Enzymen kann man Tr{\"a}ger kaufen oder diese selbst herstellen. In fr{\"u}heren Arbeiten wurde ein Verfahren entwickelt, um hochpor{\"o}se Kohlenstoffmaterialien in beliebigen Dimensionen herzustellen. Als Modell-Enzym zur Immobilisierung wurde die Thermomyces lanuginosus Lipase (TLL) gew{\"a}hlt, die adsorptiv und kovalent an das Material sowie an zwei k{\"a}ufliche Tr{\"a}germaterialien auf Polymethacryl-Basis (Funktionalit{\"a}ten: Ethylendiamin- bzw. Diolgruppen)gebunden werden sollten. Es wurden Kohlenstoffgranulat (d = 125 -200 mm) und zylindrische Monolithe (h = 4 cm; d = 1 cm) synthetisiert. Die adsorptive Immobilisierung ergab am Kohlenstoffgranulat Aktivit{\"a}ten von bis zu 2,5Ug⁻¹ gegen{\"u}ber p-Nitrophenyl Palmitat (pNPP). Bei den zwei k{\"a}uflichen Materialien wurden Aktivit{\"a}ten von bis zu 1,8Ug⁻¹ erreicht. Mit der kovalenten Immobilisierung konnten Aktivit{\"a}ten von bis zu 10Ug⁻¹ am Kohlenstoffmaterial sowie dem Polymethacryl-Material (-OH funktionalisiert) gegen{\"u}ber pNPP erreicht werden. Das Kohlenstoffmaterial ist ein geeigneter Tr{\"a}ger f{\"u}r die TLL, der im Vergleich mit g{\"a}ngigen Materialien Aktivit{\"a}ten in der gleichen Gr{\"o}ßenordnung zul{\"a}sst. Das Porenvolumen des Materials sowie die Makroporosit{\"a}t k{\"o}nnten erh{\"o}ht werden, um Diffusions- und Durchstr{\"o}mungsbarrieren im Monolithen abzubauen.}, language = {de} } @techreport{Klepel, author = {Klepel, Olaf}, title = {Entwicklung mikropor{\"o}ser Kohlenstoffmonolithe f{\"u}r Anwendungen in der Luft- und K{\"a}ltetechnik}, publisher = {Brandenburgische Technische Universit{\"a}t}, address = {Cottbus ; Senftenberg}, doi = {10.2314/GBV:870371126}, pages = {40}, language = {de} } @misc{KlepelTaubert, author = {Klepel, Olaf and Taubert, Michael}, title = {Attempts to design porous carbon monoliths using porous concrete as a template - Part II: Some aspects of the pore formation mechanism}, series = {Microporous Mesoporous Mater}, volume = {280}, journal = {Microporous Mesoporous Mater}, issn = {1387-1811}, doi = {10.1016/j.micromeso.2019.02.024}, pages = {243 -- 247}, language = {en} } @inproceedings{KlepelWalterGuentheretal., author = {Klepel, Olaf and Walter, Reni and G{\"u}nther, David and Niebrzydowska, Paula and Wach, Anna and Kuśtrowski, Piotr}, title = {Carbon materials prepared by template assisted routes as catalysts for oxidative dehydrogenation of ethylbenzene}, series = {5th International Sypmosium on "Carbon on Catalysis", Books of abstracts, Bressanone/Brixen, 2012}, booktitle = {5th International Sypmosium on "Carbon on Catalysis", Books of abstracts, Bressanone/Brixen, 2012}, pages = {S. 92}, language = {en} } @inproceedings{WalterGuentherKlepeletal., author = {Walter, Reni and G{\"u}nther, David and Klepel, Olaf and Schilling, Thorsten and Erler, Thomas and Bron, Michael}, title = {Carbon materials prepared by template assisted routes as catalysts for electrochemical oxygen reduction}, series = {5th International Sypmosium on "Carbon on Catalysis", Books of abstracts, Bressanone/Brixen, 2012}, booktitle = {5th International Sypmosium on "Carbon on Catalysis", Books of abstracts, Bressanone/Brixen, 2012}, pages = {S. 93}, language = {en} } @inproceedings{TaubertBeckmannZimmermannetal., author = {Taubert, Michael and Beckmann, Jens and Zimmermann, J{\"o}rg and Lange, Andreas and Enke, Dirk and Klepel, Olaf}, title = {Template synthesis of carbon monoliths based on porous concrete}, series = {Carbon materials for ubiquitous and sustainable life : Annual World Conference on Carbon (Carbon 2014) ; Jeju, Korea, 27 June - 4 July 2014 ; [abstracts]}, booktitle = {Carbon materials for ubiquitous and sustainable life : Annual World Conference on Carbon (Carbon 2014) ; Jeju, Korea, 27 June - 4 July 2014 ; [abstracts]}, publisher = {Curran}, address = {Red Hook, NY}, isbn = {9781634399050}, pages = {S. 511}, language = {en} } @inproceedings{ErlitzDannebergKlepel, author = {Erlitz, Marcel and Danneberg, Nina and Klepel, Olaf}, title = {Template assisted synthesis of porous carbon: insight in the process of the carbon deposition in the template}, series = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, booktitle = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, publisher = {Deutsche Keramische Gesellschaft e.V.}, address = {K{\"o}ln}, pages = {S. 21}, language = {en} } @inproceedings{TaubertDraegerEnkeetal., author = {Taubert, Michael and Dr{\"a}ger, Matti and Enke, Dirk and Klepel, Olaf}, title = {Carbon monoliths with hierarchical pore system obtained by template assisted synthesis}, series = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, booktitle = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, publisher = {Deutsche Keramische Gesellschaft e.V.}, address = {K{\"o}ln}, pages = {S. 41}, language = {en} } @inproceedings{UtgenanntHansenKlepeletal., author = {Utgenannt, Stephan and Hansen, Felix and Klepel, Olaf and Jarczewski, Sebastian and Wach, Anna and Kustrowski, Piotr and Erler, Thomas and Bron, Michael}, title = {A modular concept for the preparation of carbon based catalysts}, series = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, booktitle = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, publisher = {Deutsche Keramische Gesellschaft e.V.}, address = {K{\"o}ln}, pages = {S. 294}, language = {en} }