Article
Materials Science, Ceramics
Suyin Zhang, Qinhua Wei, Hang Yin, Gao Tang, Zhenhua Chen, Xiaoli Xu, Laishun Qin
Summary: Pure and Eu2+-activated fluoroborate BaGaBO3F2, a wide band semiconductor with indirect transition characteristic, was synthesized through high-temperature solid-state reaction. The phosphor exhibits a bright blue color under UV light and has a narrow emission band at 425 nm attributed to 4f(6)5d & RARR;4f(7)(S-8(7/2)) transitions. The Eu2+-doped BaGaBO3F2 phosphor shows a high quantum efficiency of 72.5% and can be used as a blue-emitting phosphor in various applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Optics
Yasushi Sato, Riho Miyake, Ayana Tanigaki, Shinnosuke Akiyama, Koji Tomita, Masato Kakihana
Summary: Eu2+-activated Ca3ZrSi2O9 phosphors were synthesized successfully using propylene glycol-modified silane, and the photoluminescence properties were found to be dependent on the total Eu content. Low Eu2+ content resulted in green emission, while high Eu2+ content led to red emission, attributed to Eu2+ occupying different crystallographic sites.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Xiong Yang, Xue-Jing Xing, Yu-jie Zhao, Zeng-yue Yang, Yi-Fan Liu, Chun-Hong Mu, Hao Van Bui, Zhong-Wei Zhang, Simeon Agathopoulos, Xin Xu, Liang-Jun Yin
Summary: Sr2Si5N8:Eu2+ (258) phosphor with excellent red emission properties has attracted much attention, but its poor thermal stability hinders its further development in electronic display devices. In this study, a 258 phosphor was synthesized and coated with an ultrathin carbon layer to improve its thermal stability and oxidation resistance. The carbothermal reaction during the annealing process reduced the oxidation of luminescent centers and host lattice, while the crystallized carbon formed a graphene-like multilayer that protected the phosphor from external oxygen penetration.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Xiaomeng Yin, Yanna Tian, Jie Chen, Xuezhuan Yi, Renjie Jiang, Dawei Zhang, Hui Lin, Shengming Zhou, Sachuronggui Bai
Summary: Ba1-xAl2O4:xEu(2+) (x = 0.005-0.1) cyan phosphor ceramics were fabricated using high-temperature vacuum sintering technology. These ceramics exhibit a broad emission band with an emission peak at 497 nm under excitation of 365 nm near ultraviolet light. White light-emitting diodes (w-LEDs) encapsulated by Ba0.9Al2O4:0.1Eu(2+) phosphor ceramics, CaAlSiN3:Eu2+ phosphors in glass, and NUV-LED chips, showed a correlated color temperature of 5050 K and a color rendering index of 75 when driven by 300 mA electricity. This suggests the potential application of cyan BaAl2O4:Eu2+ ceramic phosphors in the field of full-spectrum lighting.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yifei Liu, Yifeng Liu, Meihua Wu, Can He, Qiyun Liu, Ximing Huang, Xin Min, Zhaohui Huang, Hui Wang, Ruiyu Mi
Summary: A novel blue-emitting phosphor, MgAl2Si4O6N4:Eu2+, was successfully synthesized with changing emission band properties under increasing Eu2+ concentration. The prepared phosphor showed excellent emission characteristics in white LED devices.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Joonseo Park, Jin-Woong Lee, Satendra Pal Singh, Minseuk Kim, Byung Do Lee, Woon Bae Park, Kee -Sun Sohn
Summary: A novel quaternary sulfide phosphor emitting cyan light was discovered and found to be suitable for LED applications due to its high photoluminescence intensity and optimal crystallinity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Bin Deng, Fan-hua Zeng, Jun Chen, Chong-song Zhou, Hui Liu, Gong-guo Zhang
Summary: Novel ceramic phosphors were synthesized and showed excellent luminescent properties, making them a promising candidate for white lighting applications.
JOURNAL OF LUMINESCENCE
(2021)
Article
Physics, Condensed Matter
Ilya E. Kolesnikov, Elena Afanaseva, Mikhail A. Kurochkin, Evgenii Yu Kolesnikov, Erkki Lahderanta
Summary: A novel mixed-valent Eu2+/Eu3+-doped MgAl2O4 phosphor is reported as a ratiometric thermal sensor, offering high thermal sensitivity and temperature resolution, making it a promising material for optical thermometry.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Jung Hyeon Yoo, Bo Young Kim, Seong Guk Jeong, Seok Bin Kwon, Ho Chan Yoo, Seung Hee Choi, Young Hyun Song, Bong Kyun Kang, Dae Ho Yoon
Summary: This study compares the effects of wet and plasma coating methods on surface modification of phosphors. The results show that the plasma process provides better coating uniformity. The plasma-coated phosphor with a coating agent containing a long carbon chain maintains a luminescence intensity of over 50% even after being soaked in water for 48 hours, while the pristine phosphor loses its luminescence characteristics and undergoes a phase transition.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Applied
Hongren Chen, Licheng Ju, Li Zhang, Xin Wang, Linbo Zhang, Xin Xu, Lin Gao, Kehui Qiu, Liangjun Yin
Summary: Control of YAG:Ce phosphor particle size was achieved through carbon coating and heat treatment, resulting in a significant reduction in particle size while maintaining stable photoluminescent properties.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Physical
Huahui Li, Jiazuo Liang, Runze Li, Chengkang Chang
Summary: The afterglow of orange-emitting Sr3Al2O5Cl2:Eu2+, Dy3+ phosphors is enhanced by co-doping with Mg2+, which increases the concentration of Eu2+ and creates suitable electron traps in the phosphor. This results in brighter initial photoluminescence and longer afterglow.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Aixia Deng, Xinyu Tian, Xufeng Zhou, Jianyan Ding, Wanying Geng, Quansheng Wu
Summary: A new type of narrow-band blue light-emitting phosphor, Rb2HfSi3O9:Eu2+, with good photoluminescence properties and thermal stability, was successfully synthesized in this study for potential use in white light-emitting diodes.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Ceramics
Lina Chen, Xiaowen Zheng, Chongyang Hao, Qidi Sun, Pengchao Si, Lijie Ci, Jun Wei
Summary: Manganese oxides are considered as one of the most promising electrode materials for energy storage systems. By intercalating K+ ions and coating the particles with a carbon layer, manganese oxides are able to achieve fast charging/discharging ability.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Daniel S. Wimmer, Markus Seibald, Dominik Baumann, Simon Peschke, Klaus Wurst, Gunter Heymann, Daniel Dutzler, Amador Garcia-Fuente, Werner Urland, Hubert Huppertz
Summary: LKLSO:Eu2+ was synthesized by a high-temperature solid-state reaction, with a specific crystal structure and emission characteristics. Despite the positional disorder in the structure, the cyan-green phosphor exhibits a narrow emission band with a specific emission wavelength and full width half maximum.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Engineering, Environmental
Can He, Takashi Takeda, Zhaohui Huang, Jian Xu, Jun Chen, Wei Yi, Rongjun Xie, Naoto Hirosaki
Summary: The novel needle-like Ba5Si11Al7N25:Eu2+ phosphor exhibits a broad yellow emission band centered at 570 nm. Compared with YAG: Ce phosphor, it has a longer emission wavelength, indicating potential application in warm white LEDs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Fuweng Zhang, Damiano La Zara, Feilong Sun, Michael J. Quayle, Gunilla Petersson, Staffan Folestad, J. Ruud van Ommen
Summary: The study investigated the fluidization of fine inhalation grade of lactose powders and found that a combination of vibration and micro-jet showed the best performance in improving fluidization. Using any two assisting methods together leads to better fluidization, with micro-jet resulting in considerable powder losses. Overall, the introduction of assistance methods enhanced separation forces and decreased agglomerate size.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Amirhossein Mahtabani, Damiano La Zara, Rafal Anyszka, Xiaozhen He, Mika Paajanen, J. Ruud van Ommen, Wilma Dierkes, Anke Blume
Summary: The gas-phase modification process improved control over the thickness and uniformity of the deposited layers on nanoparticles, allowing for the introduction of versatile functionalized organic layers on the surface of nanoparticles in a controlled manner.
Article
Nanoscience & Nanotechnology
Dominik Benz, Y-Nhi T. Nguyen, Thanh-Lieu T. Le, Thanh-Hiep T. Le, Viet-Thong Le, J. Ruud van Ommen, Hao Van Bui
Summary: This study introduces a gas-phase approach for synthesizing Cu2O/TiO2 powder-based photocatalysts using atomic layer deposition (ALD) in a fluidized bed reactor. The deposition of ultrasmall Cu2O clusters on P25 TiO2 nanoparticles enhances the photocatalytic activity significantly, attributed to efficient charge transfer and reduced charge recombination. The study provides a fast, scalable, and efficient process for controllably depositing Cu2O clusters for surface engineering.
Article
Environmental Sciences
Pieter van Gelder, Pim Klaassen, Behnam Taebi, Bart Walhout, Ruud van Ommen, Ibo van de Poel, Zoe Robaey, Lotte Asveld, Ruud Balkenende, Frank Hollmann, Erik Jan van Kampen, Nima Khakzad, Robbert Krebbers, Jos de Lange, Wolter Pieters, Karel Terwel, Eelco Visser, Tiny van der Werff, Dick Jung
Summary: This paper provides an overview of the concept and application of Safe-by-Design in various engineering disciplines, discussing differences, commonalities, and empirical data on design strategies. Safe-by-Design is considered a specific elaboration of Responsible Research and Innovation, helping to proactively incorporate safety considerations into engineering practices while avoiding extremes of technological optimism and disproportionate precaution.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Environmental Sciences
Georgios Archimidis Tsalidis, Lya G. Soeteman-Hernandez, Cornelle W. Noorlander, Saeed Saedy, J. Ruud van Ommen, Martina G. Vijver, Gijsbert Korevaar
Summary: Safe-and-sustainable-by-design is a concept that integrates safety, sustainability, and functionality throughout a product's life cycle. This paper proposes a framework for early safety and sustainability assessment based on prospective life cycle assessment. The framework helps identify environmental sustainability and toxicity hotspots to avoid the development of toxic alternatives.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Isabell Bagemihl, Chaitanya Bhatraju, J. Ruud van Ommen, Volkert van Steijn
Summary: This paper demonstrates that structured reactors operated under gas-liquid Taylor flow can overcome the mass transfer limitations in CO2 electrolysis in aqueous systems and significantly improve reactor performance. By developing an easy-to-use analytical model, the relationship between process conditions, mass transfer, and reactor performance is explored. The results show that the film thickness and the volume ratio of CO2/electrolyte fed to the reactor greatly affect the current density and the faradaic efficiency, and industrially relevant performance can be achieved when operating the reactor at an elevated pressure beyond 5 bar.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Ceramics
Yujie Zhao, Xiao Wang, Quan-an Li, Xinyu Zhang, Ye Li, Rong-Jun Xie, J. Ruud van Ommen, H. T. Hintzen
Summary: Depositing nano-sized Al2O3 film around each BaSi2O2N2:Eu2+ particle through atomic layer deposition (ALD) can improve its thermal stability and inhibit oxidation. The Al2O3 coated phosphor showed an increased oxidation temperature and reduced degradation under water-steam conditions. White light-emitting diodes (wLEDs) fabricated with the Al2O3 coated phosphor also exhibited a significantly higher luminous flux.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Asvin Sajeev Kumar, Marilia Pupo, Kostadin V. Petrov, Mahinder Ramdin, J. Ruud van Ommen, Wiebren de Jong, Ruud Kortlever
Summary: This study investigates the electrochemical CO2 reduction performance of copper in non-aqueous electrolytes based on DMF, NMP, and ACN. The results show that DMF and NMP mainly produce oxalate, while ACN mainly produces hydrogen and formate. Therefore, aqueous electrolytes exhibit higher selectivity for hydrocarbon and alcohol production on copper electrodes, while organic electrolytes based on DMF and NMP are more suitable for obtaining oxalate and formate.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Biochemistry & Molecular Biology
Sunkeun Kim, Wilma K. Dierkes, Anke Blume, Auke Talma, J. Ruud Van Ommen, Nicolas Courtois, Julian Davin, Carla Recker, Julia Schoeffel
Summary: This study investigates the compatibility of pre-treated silica with natural rubber and its influence on the processing of silica-silane compounds. The results show that incorporating pre-treated silica fillers can improve the processing and reduce the generation of volatile organic compounds.
Article
Chemistry, Multidisciplinary
Isabell Bagemihl, Lucas Cammann, Mar Perez-Fortes, Volkert van Steijn, J. Ruud van Ommen
Summary: Coupling the analysis of technical feasibility with economic evaluation is crucial in identifying targets for development in electrochemical CO2 conversion processes. Electrochemical conversion of captured CO2 to base chemicals has the potential to contribute to a sustainable energy transition by closing the carbon cycle. While low-temperature electrochemical CO2 conversion has been demonstrated at lab scale, optimizing electrolyzer design and operation for industrial applications based on techno-economic analysis is the current focus. However, existing analyses often overlook the interdependencies between key performance variables, such as current density, Faradaic efficiency, and conversion. Our study highlights the significance of multiscale models in the field of CO2 electrolysis to understand the economic trade-offs and overcome bottlenecks in system designs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Riccardo Uglietti, Daniele Micale, Damiano La Zara, Aristeidis Goulas, Luca Nardi, Mauro Bracconi, J. Ruud van Ommen, Matteo Maestri
Summary: This study demonstrates the potential of combining numerical and experimental approaches in understanding catalytic reactors, particularly fluidized beds. Through experiments and data analysis, the effectiveness of the in-house first-principles multiscale Computational Fluid Dynamic-Discrete Element Method (CFD-DEM) model is validated, and the fundamental insights that can be achieved through detailed numerical methods are reported. The integration of experimental information and numerical simulations allows for optimal design and scale-up procedures for reactor configurations with promising prospects in the energy transition.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Jacob A. Moulijn, J. Ruud van Ommen, Aristeidis Goulas, David Valdesueiro, Jana Juan-Alcaniz, Kar-Ming Au-Yeung, Leo Woning, Jaap A. Bergwerff
Summary: The possibility of using a Ti alkoxide precursor for gas phase deposition to modify catalysts was demonstrated. A Ti oxide layer was successfully deposited on a mesoporous alumina support using titanium tetra-isopropoxide. The uniformity of the TiO2 coating was confirmed at both intra-particle and inter-particle levels. The TiO2 coating showed stability and improved catalytic activity in hydroprocessing compared to pristine alumina.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Albert Santoso, Afke Damen, J. Ruud van Ommen, Volkert van Steijn
Summary: We investigated three variations of atomic layer deposition (ALD) for depositing titanium oxide onto the soft polymer polydimethylsiloxane (PDMS). Our findings demonstrate that ALD performed at atmospheric pressure significantly enhances the organic solvent resistance of PDMS by two orders of magnitude, resulting in a unique surface-subsurface coating of PDMS.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Saeed Saedy, Nico Hiemstra, Dominik Benz, Hao Van Bui, Michael Nolan, J. Ruud van Ommen
Summary: The promotional effects of ALD-deposited CuxO clusters on photocatalytic hydrogen production on P25 TiO2 were studied. It was found that the strong interaction between CuxO and TiO2 resulted in the stabilization of CuxO clusters on the surface. The CuxO/TiO2 photocatalysts showed remarkable improvement in hydrogen productivity, which can be attributed to increased charge carrier separation, improved light absorption, and the generation of surface Ti3+.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Dominik Benz, Hao Van Bui, Hubertus T. Hintzen, Michiel T. Kreutzer, J. Ruud Van Ommen
Summary: The photocatalytic mechanism of TiO2 nanoparticles coated with SiO2 by atomic layer deposition was investigated. SiO2 deposition not only improves the photocatalytic degradation of pollutants, but also changes the degradation mechanism. Low SiO2 loadings enhance OH* radicals generation, while high loadings suppress the photocatalytic performance.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
