@article{WetterReetzTallaksenetal.2025, author = {Wetter, Christof and Reetz, Sven and Tallaksen, Joel and Larson, John}, title = {Making the Connection Between PFASs and Agriculture Using the Example of Minnesota, USA: A Rev}, series = {Agriculture}, journal = {Agriculture}, number = {Juni 2025}, publisher = {MDPI}, doi = {10.25974/fhms-19324}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-193240}, year = {2025}, language = {en} } @article{SandtenKreyenschmidtAlbach2024, author = {Sandten, Christian and Kreyenschmidt, Martin and Albach, Rolf}, title = {The autoxidation of polyether-polyurethane open cell soft foam: An analytical aging method to reproducibly determine VOC emissions caused by thermo-oxidative degradation}, series = {Journal of Hazardous Materials}, volume = {2024}, journal = {Journal of Hazardous Materials}, doi = {10.25974/fhms-19089}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190895}, pages = {474}, year = {2024}, abstract = {We present a new method for investigating the oxidation and emission behavior of air-permeable materials. Employing this method, a differentiated statement can be made about the extent to which critical volatile organic compounds (VOCs) such as formaldehyde, acetaldehyde, and acrolein are contained in the material as impurities or formed by thermo-oxidative degradation of the polymer matrix in the use phase. The parameters affecting methods of VOC analysis are reviewed and considered for the developed method. The molecular mechanisms of VOC formation are discussed. Toxicological implications of the reaction kinetics are put into context with international guidelines and threshold levels. This new method enables manufacturers of cellular materials not only to determine the oxidative stability of their products but also to optimize them specifically for higher durability. Environmental Implication: Cellular materials are ubiquitous in the technosphere. They play a crucial role in various microenvironments such as automotive interiors, building insulation, and cushioning. These materials are susceptible to oxidative breakdown, leading to the release of formaldehyde, acetaldehyde, and acrolein. The ecotoxicological profiles of these compounds necessitate monitoring and regulation. The absence of reproducible and reliable analytical methods restricts research and development aimed at risk assessment and mitigation. This work significantly enhances the toolbox for optimizing the oxidative stability of any open-cell cellular material and evaluating these materials in terms of their temperature-dependent oxidation and emission behavior.}, language = {en} } @article{SandtenKreyenschmidtAlbachetal.2024, author = {Sandten, Christian and Kreyenschmidt, Martin and Albach, Rolf and Fittschen, Ursula}, title = {The Thermo-Oxidative Degradation of Polyurethane Open-Cell Soft Foam Investigated Through Gas Chromatography and Mass Spectrometry of Volatile Organic Compounds}, series = {Polymers}, volume = {2024}, journal = {Polymers}, doi = {10.25974/fhms-19090}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190902}, year = {2024}, abstract = {Polyurethane (PUR) soft foams release malodorous and potentially toxic compounds when exposed to oxidative conditions. Current chamber test methods cannot distinguish between pre-existing volatiles and those formed during oxidation, nor can they assess the formation rates of oxidation products. We subjected PUR soft foam to oxidative treatment in a continuous air flow at 120 ◦C. Emissions were convectively transferred from the foam to an exhaust port and analyzed using a thermodesorption-gas chromatography-mass spectrometry (TD-GC-MS) system, with external calibration employed for the quantification of selected analytes. The study identified hydroperoxide formation and degradation as key mechanisms in the breakdown of the polyether soft segments. This process predominantly produces volatiles, such as carboxylic acids, formates, acetates, alpha-hydroxy-ketones, (unsaturated) aldehydes, substituted dioxolanes and dioxanes, glycols, and allyl ethers. Volatiles associated with the degradation of the hard segments include aniline, benzoxazole, 2-methylbenzoxazole, and benzaldehyde. This experimental setup enables reproducible qualitative and quantitative analysis of volatiles formed during the oxidative degradation of PUR soft foams, providing new insights into the segment-dependent chemical pathways of the polymer's molecular breakdown.}, language = {en} } @article{KerkelingSandtenSchuppetal.2021, author = {Kerkeling, Saskia and Sandten, Christian and Schupp, Thomas and Kreyenschmidt, Martin}, title = {VOC EMISSIONS FROM PARTICLE FILTERING HALF MASKS - METHODS, RISKS AND NEED FOR FURTHER ACTION}, series = {EXCLI}, journal = {EXCLI}, issn = {1611-2156}, doi = {10.25974/fhms-19091}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190912}, year = {2021}, abstract = {Investigations into volatile organic compound (VOC) emissions from polymer fleeces used in particle filtering half masks were conducted and evaluated against the German hygienic guide value for total volatile organic com- pounds and the "Lowest Concentration of Interest" for construction products. All masks showed emission of Xy- lene. In 94 \% of samples, up to 24 additional aromatic compounds were found. 17 \% of samples showed terpenes, 53 \% emitted aldehydes, 77 \% exhibited caprolactam and 98 \% released siloxanes. All masks exceeded the TVOC hygienic guidance value level 5 of 10 mg/m³. Emission levels were investigated for masks immediately after their packages were opened and for masks that were "vented" for two weeks. Further, the emissions were repeatedly measured to investigate the decrease of emissions. An exponential decline was observed and a fitting function was calculated. The influence of the two commonly gas chromatograph (GC) hyphenated detectors, mass spectrometer (MS) and flame ionization detector (FID) on the VOC quantification, as well as the influence of temperature on the emission of VOCs were investigated. A statistical analysis of emission value differences for Notified Bodies was conducted and CE 2163 and 2020-1XG proved to be outliers.}, language = {en} } @article{GoldmannPierJuestel2025, author = {Goldmann, J. and Pier, T. and J{\"u}stel, T.}, title = {On the Luminescent Properties of Eu3+ Doped La2Hf3(WO4)9}, series = {J. Luminescence}, volume = {230}, journal = {J. Luminescence}, doi = {10.25974/fhms-19070}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190700}, pages = {121091 -- 121091}, year = {2025}, language = {en} } @article{BayatStroebeleEnselingetal.2024, author = {Bayat, E. and Str{\"o}bele, M. and Enseling, D. and J{\"u}stel, T. and Meyer, H.-J.}, title = {Thermal Deprotonation and Condensation of Melamine in the Presence of Indium(III)chloride}, series = {Dalton Transactions}, volume = {53}, journal = {Dalton Transactions}, doi = {10.25974/fhms-19066}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190665}, year = {2024}, language = {en} } @article{StroebeleEnselingJuesteletal.2024, author = {Str{\"o}bele, M. and Enseling, D. and J{\"u}stel, T. and Kroeker, S. and Meyer, H.-J.}, title = {Metal-Halide-Melem Adducts based on M6-, M9- and M12-Clusters}, series = {Eur. J. Inorg. Chem}, journal = {Eur. J. Inorg. Chem}, doi = {10.25974/fhms-19064}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190640}, year = {2024}, language = {en} } @article{BayatStroebeleEnselingetal.2024, author = {Bayat, E. and Str{\"o}bele, M. and Enseling, D. and J{\"u}stel, T. and Meyer, H.-J.}, title = {MnCl2(C6N10H6): Insights into a Luminescent Transition Metal-Melem Adduct}, series = {Molecules}, volume = {29}, journal = {Molecules}, doi = {10.25974/fhms-19065}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190654}, year = {2024}, language = {en} } @article{KysliakStroebeleEnselingetal.2024, author = {Kysliak, O. and Str{\"o}bele, M. and Enseling, D. and J{\"u}stel, T. and Meyer, H.-J.}, title = {Cationic Control on the Formation of Europium Carbodiimide Chlorides}, series = {e202400437}, volume = {27}, journal = {e202400437}, doi = {10.25974/fhms-19067}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190675}, year = {2024}, language = {en} } @article{ErkmenUlberJuesteletal.2025, author = {Erkmen, A.N. and Ulber, R. and J{\"u}stel, T. and Altendorfner, M.}, title = {Towards Sustainable Recycling of Critical Metals from E-Waste: Bioleaching and Phytomining}, series = {Resources, Conservation \& Recycling}, volume = {215}, journal = {Resources, Conservation \& Recycling}, doi = {10.25974/fhms-19069}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190695}, year = {2025}, language = {en} } @article{SchneiderhahnBayatStroebeleetal.2025, author = {Schneiderhahn, P. and Bayat, E. and Str{\"o}bele, M. and Enseling, D. and J{\"u}stel, T. and H.-J.,}, title = {Meyer La2(CN2)3 - The missing Link of Rare Earth Carbodiimides, prepared through an exceedingly efficient Way of Synthesis and its Ce3+ activated Photoluminescence}, series = {Dalton Transactions}, volume = {54}, journal = {Dalton Transactions}, doi = {10.25974/fhms-19072}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190724}, pages = {4909, -- 4909,}, year = {2025}, language = {en} } @article{MedinaJuradoBourakhouadarCorkettetal.2025, author = {Medina-Jurado, J. and Bourakhouadar, H. and Corkett, A.J. and Enseling, D. and J{\"u}stel, T. and Dronskowski, R.}, title = {The missing Tb2O2NCN Compound: Synthesis, Characterisation and Luminescent Properties}, series = {Z. Anorg. Allg. Chem}, volume = {651}, journal = {Z. Anorg. Allg. Chem}, doi = {10.25974/fhms-19071}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190715}, pages = {e202400212}, year = {2025}, language = {en} } @article{KappelhoffGreveJuestel2024, author = {Kappelhoff, J. and Greve, B. and J{\"u}stel, T.}, title = {On the Temperature and Time Dependent Photoluminescence of Nanoscale LuPO4:Eu3+ and Their Application for Bioimaging}, series = {RSC Advances}, volume = {14}, journal = {RSC Advances}, doi = {10.25974/fhms-19062}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190627}, pages = {29992, -- 29992,}, year = {2024}, language = {en} } @article{PierSchroederKappelhoffetal.2025, author = {Pier, T. and Schr{\"o}der, F. and Kappelhoff, J. and Hopster, J. and J{\"u}stel, T.}, title = {On the photoluminescence of Pr(III) activated Ca2P2O7 polymorphs}, series = {J. Luminescence}, volume = {227}, journal = {J. Luminescence}, doi = {10.25974/fhms-19068}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-190686}, year = {2025}, language = {en} } @article{BredolRadevPrimaveraetal.2025, author = {Bredol, Michael and Radev, Ivan and Primavera, Giulia and Lange, Thomas and Caidi, Adib and Peinecke, Volker}, title = {Electrophoretic Deposition of Carbon-Ionomer Layers on Proton Conducting Membranes}, series = {ChemPhysChem}, journal = {ChemPhysChem}, doi = {10.25974/fhms-18859}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-188594}, pages = {e202400767}, year = {2025}, abstract = {Synthetic and natural carbons are widely used as carrier for electrodes in electrochemical applications. They need to have a controlled morphology in order to facilitate mass and charge transport, so the process of film formation is of uttermost importance. Here we show, how carbons (after proper preconditioning) can be codeposited with an ionomer by electrophoretic deposition, a method that does allow full control of deposition conditions during the process. In view of potential applications, we focus on the direct deposition on proton conducting membranes. Ionomers and membranes applied are based on established per-fluorinated polyethylene with SO3H terminated side chains (PFSA). Conditions for reproducible deposition are reported in terms of optimal charge on the carbon particles, field strength in the deposition cell and necessary deposition times for a given film thickness. Additionally, a horizontal cell arrangement is suggested to avoid gravitational effects.}, language = {en} } @article{SchaeferlingOndrus2024, author = {Sch{\"a}ferling, Michael and Ondrus, Vladimir}, title = {The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012-2022}, series = {Chemosensors}, volume = {12}, journal = {Chemosensors}, number = {3}, doi = {10.25974/fhms-18163}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181636}, pages = {31}, year = {2024}, abstract = {Imaging methods by the means of optical sensors are applied in diverse scientific areas such as medical research and diagnostics, aerodynamics, environmental analysis, or marine research. After a general introduction to the field, this review is focused on works published between 2012 and 2022. The covered topics include planar sensors (optrodes), nanoprobes, and sensitive coatings. Advanced sensor materials combined with imaging technologies enable the visualization of parameters which exhibit no intrinsic color or fluorescence, such as oxygen, pH, CO2, H2O2, Ca2+, or temperature. The progress on the development of multiple sensors and methods for referenced signal read out is also highlighted, as is the recent progress in device design and application formats using model systems in the lab or methods for measurements' in the field.}, language = {en} } @article{KraemerHopsterGruenebaumetal.2024, author = {Kr{\"a}mer, S. and Hopster, J. and Gr{\"u}nebaum, M. and J{\"u}stel, T. and Winter, M. and Neuhaus, K.}, title = {Teaching an old dog new tricks: Ti-doped ZnFe2O4 as active material in zinc ion batteries - A Proof of Concept}, series = {Energy Advances}, journal = {Energy Advances}, doi = {10.25974/fhms-18118}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181183}, year = {2024}, language = {en} } @article{ExelerJuestel2024, author = {Exeler, J. and J{\"u}stel, T.}, title = {Advances in Functional Ceramics for Water Splitting: A Comprehensive Review}, series = {Photochem}, volume = {4}, journal = {Photochem}, doi = {10.25974/fhms-18117}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181172}, pages = {424}, year = {2024}, language = {en} } @article{ExelerJuestel2024, author = {Exeler, J. and J{\"u}stel, T.}, title = {4f-4f Absorption Strength of Eu3+ in La2Zr3(MoO4)9 Compared to other Eu3+ Activated Luminescent Materials}, series = {Mat. Res. Bull.}, volume = {176}, journal = {Mat. Res. Bull.}, doi = {10.25974/fhms-18116}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181161}, pages = {112816}, year = {2024}, language = {en} } @article{SchwarzStroebeleRomaoetal.2024, author = {Schwarz, A. T. and Str{\"o}bele, M. and Romao, C. P. and Enseling, D. and J{\"u}stel, T.}, title = {The Luminescent Semiconductor Pb7I6(CN2)4}, series = {Dalton Transactions}, volume = {53}, journal = {Dalton Transactions}, doi = {10.25974/fhms-18115}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181150}, pages = {6416}, year = {2024}, language = {en} } @article{ReetzSchroederJuestel2024, author = {Reetz, S. and Schr{\"o}der, F. and J{\"u}stel, T.}, title = {On the Energy Dependence of the PL of RE Ions in LuBO3:RE (RE = Ce, Eu, Gd, or Tb}, series = {Crystals}, volume = {14}, journal = {Crystals}, doi = {10.25974/fhms-18114}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181146}, pages = {341}, year = {2024}, language = {en} } @article{PierJuestel2024, author = {Pier, T. and J{\"u}stel, T.}, title = {Application of Eu3+ Doped Tungstates for Solid State Lighting}, series = {Optical Materials X}, volume = {22}, journal = {Optical Materials X}, doi = {10.25974/fhms-18111}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-181110}, pages = {100299}, year = {2024}, language = {en} } @article{DittelCicekBredoletal.2023, author = {Dittel, G{\"o}zdem and {\c{C}}i{\c{c}}ek, Irem Ecem and Bredol, Michael and Gries, Thomas}, title = {Carbon Rovings as Strain Sensor in TRC Structures: Effect of Roving Cross-Sectional Shape and Coating Material on the Electrical Response under Bending Stress}, series = {Sensors}, volume = {23}, journal = {Sensors}, doi = {10.3390/s23104601}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-170823}, pages = {4601}, year = {2023}, abstract = {This study investigated the ability of electrically conductive carbon rovings to detect cracks in textile-reinforced concrete (TRC) structures. The key innovation lies in the integration of carbon rovings into the reinforcing textile, which not only contributes to the mechanical properties of the concrete structure but also eliminates the need for an additional sensory system, such as strain gauges, to monitor the structural health. Carbon rovings are integrated into a grid-like textile reinforcement that differs in binding type and dispersion concentration of the styrene butadiene rubber (SBR) coating. Ninety final samples were subjected to a four-point bending test in which the electrical changes of the carbon rovings were measured simultaneously to capture the strain. The mechanical results show that the SBR50-coated TRC samples with circular and elliptical cross-sectional shape achieved, with 1.55 kN, the highest bending tensile strength, which is also captured with a value of 0.65 Ω by the electrical impedance monitoring. The elongation and fracture of the rovings have a significant effect on the impedance mainly due to electrical resistance change. A correlation was found between the impedance change, binding type and coating. This suggests that the elongation and fracture mechanisms are affected by the number of outer and inner filaments, as well as the coating.}, language = {en} } @misc{OPUS4-15752, title = {28. Anwendertreffen R{\"o}ntgenfluoreszenz- und Funkenemissionsspektrometrie}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-157524}, year = {2023}, abstract = {Programm und Abstracts des 28. Anwendertreffen R{\"o}ntgenfluoreszenz- und Funkenemissionsspektrometrie}, language = {de} } @article{BreuckmannWackerHanningetal.2022, author = {Breuckmann, Michael and Wacker, Georg and Hanning, Stephanie and Otto, Matthias and Kreyenschmidt, Martin}, title = {Quantification of C, H, N and O in polymers using WDXRF scattering spectra and PLS regression depending on the spectral resolution}, series = {Journal of Analytical Atomic Spectrometry}, journal = {Journal of Analytical Atomic Spectrometry}, issn = {1364-5544}, doi = {10.25974/fhms-14925}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-149252}, year = {2022}, abstract = {A new approach to determine the elements carbon, hydrogen, nitrogen and oxygen (CHNO) in polymers by wavelength-dispersive X-ray fluorescence analysis (WDXRF) in combination with partial least squares (PLS) regression was explored. The quantification of CHNO was achieved by using the Rayleigh and Compton scattering spectra of an Rh X-ray tube from 84 different polymers. Concealed differences of the corresponding scattering spectra could be utilized to quantify CHNO in a multivariate manner. It was shown that the developed model was capable of determining these commonly non-measurable matrix elements in polymers using WDXRF. Furthermore, the influence of spectral resolution, which is given by the collimator and the crystal, on the prediction of CHNO was explored in this study. It was found that minimal spectral resolution led to the most accurate CHNO predictions. Information about matrix composition could be used to improve so-called semi-quantitative XRF methods based on fundamental parameters (FP) for the analysis of plastics, soil or other samples with high organic content.}, language = {en} } @article{BredolVoigtGonabadi2021, author = {Bredol, Michael and Voigt, Dominik and Gonabadi, Atoosa}, title = {A general strategy for CuInS2 based quantum dots with adjustable surface chemistry}, series = {Optical Materials}, volume = {115}, journal = {Optical Materials}, doi = {10.25974/fhms-13734}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-137346}, pages = {110994 -- 111005}, year = {2021}, abstract = {Different from negatively charged CuInS2 (CIS) based quantum dots (QDs), positively charged QDs are difficult to obtain in good optical quality, but are desirable for certain applications. We herein present a general synthesis strategy that allows for a universal surface modification of ternary CIS based QDs with thiol containing ligands. The idea behind the synthesis design is, to apply a ZnS shell first for passivating and protecting the core QDs, and then add a second ZnS shell for the functionalization via ligand exchange. Whereby easy ligand exchange with thiolated molecules is systematically set up, by using a weak bonding amine ligand for the second shell. Molecules with various terminal groups were used to functionalize the nanoparticles and stabilize them in different media making any surface charge and polarity accessible. Surface defect chemistry seemed to play an important role in our synthesis strategy, therefore to gain a deeper understanding how these defect sites can alter the electronic structure of core/shell nanoparticles theoretical calculations based on density functional theory were performed, whilst structural, colloidal and optical properties were characterized experimentally (by dynamic light scattering, x-ray diffraction, infrared spectroscopy, zeta potential, absorption- and (time resolved) photoluminescence measurements).}, language = {en} } @book{OPUS4-64, title = {Akademisches Jahrbuch. Bachelor-Studiengang Chemical Engineering, Diplom-Studiengang Chemieingenieurwesen, Master of Science Chemical Engineering, Master of Science Materialwissenschaften. 01.05.2003 - 25.04.2004}, publisher = {FH M{\"u}nster}, doi = {10.25974/fhms-64}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-645}, publisher = {FH M{\"u}nster - University of Applied Sciences}, year = {2004}, abstract = {Dieses Heft soll dem Leser einen {\"U}berblick {\"u}ber die Diplomarbeiten des vergangenen Jahres geben.}, language = {de} } @book{OPUS4-63, title = {Zusammenfassung Diplomarbeiten der Absolventen, Studiengang Chemieingenieurwesen, 04.05.2001 - 03.05.2002}, publisher = {FH M{\"u}nster}, doi = {10.25974/fhms-63}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-635}, publisher = {FH M{\"u}nster - University of Applied Sciences}, year = {2002}, abstract = {Dieses Heft soll dem Leser einen {\"U}berblick {\"u}ber die Diplomarbeiten des letzten Jahres geben.}, language = {de} }