Article
Green & Sustainable Science & Technology
Gabriela Berkowicz-Platek, Krystian Leski, Witold Zukowski, Jan Wrona
Summary: The aim of this study is to develop a new method for combustion processes in fluidized bed reactors. The use of a fluidized bed made out of lightweight expanded clay aggregate (LECA) has shown promising results for thermal processing of low-density solid and liquid industrial wastes, as well as waste biomass. The experiments conducted in the LECA fluidized bed demonstrated high conversion rates of carbon, with over 95% conversion achieved for polyolefins. Waste wood chips were successfully incinerated as alternative fuel in the LECA fluidized bed.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Katarzyna Kaczynska, Konrad Kaczynski, Piotr Pelka
Summary: Clay raw materials are diverse in terms of their mineral composition and physical properties. Enrichment of clay raw materials can be achieved through high temperature technologies, which may cause decomposition and removal of some additional components, as well as structural changes and reconstruction of mineral phases. Fluidization technology in the calcination of clay raw materials is competitive due to its shorter processing time, lower energy consumption, and reduced CO2 emissions.
Article
Engineering, Environmental
Wei Zhang, Haiming Wang, Changfu You
Summary: A coupled methodology was developed to model the fluidized bed coating process considering particle abrasion. Experimental data was used to verify the models of evaporation, coating, and abrasion. The research provides an efficient approach for modeling fluidized bed coating processes and offers guidelines for practical application of in-situ desulfurizer preparation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Andrey A. Lipin, Alexandr G. Lipin
Summary: This study proposes a new model for the batch fluidized-bed coating process and evaluates coating uniformity based on the degree of coverage. The numerical solution algorithm predicts particle distribution and analyzes the influence of main process parameters on coating uniformity.
Article
Engineering, Environmental
Sadaf Shakeel, Mohammad Zain Khan
Summary: Microbial electrosynthesis (MES) is a promising approach for reducing carbon footprints by converting carbon dioxide into value-added products and biofuels. However, the technology still faces challenges such as low production rates, high costs, and energy consumption. This study addresses these issues by introducing a cost-effective packed-fluidized cathode and a separate reactor for bioalcohol production from dilute acetate. These innovations improve the bioavailability of CO2 and enhance biofuel production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Pharmacology & Pharmacy
Michael W. Stocker, Matthew J. Harding, Valerio Todaro, Anne Marie Healy, Steven Ferguson
Summary: Integrated API and drug product processing allows molecules with high clinical efficacy but poor physicochemical characteristics to be commercialized by co-processing with excipients. The goal of this study was to purify a model API and impurity system and directly process it into a solid-state formulation without isolating a solid API phase. Confined agitated bed crystallization was used to purify the impure API and the spray coating process was developed using a Design of Experiments approach to control drug loading efficiency and crystallinity.
Article
Engineering, Chemical
Sanjay Kumar Devendhar Singh, Kathy Lu
Summary: In this study, defect-free SiOC coatings were prepared on yttria stabilized zirconia (YSZ) microspheres by a fluidized bed coating process. The impact regime diagram constructed demonstrated that the coating mechanisms were collision/impact. Two-step pyrolysis in Ar achieved complete coating layers, which were comprised of SiOC, SiO2, SiC, and graphite, providing a new method for producing SiOC coatings on micron spheres for the application of nuclear TRISO fuel particles.
Article
Engineering, Chemical
Maike Orth, Sonja Rotter, Wasif Safdar, Suereyya Tasdemir, Swantje Pietsch-Braune, Stefan Heinrich, Alexander Duester
Summary: The main goal of designing crash absorber particles for filling the double-hull of ships is to achieve optimal mechanical performance with a low-density structure, while meeting additional requirements such as non-toxic and hydrophobic behavior. This study used a fluidized bed to coat Poraver((R)) glass particles with Candelilla wax and silicone to meet these specifications. Coating with wax resulted in a uniform coating, but the process was more challenging with silicone. Mechanical tests and structural investigations were conducted to evaluate the suitability of coated particles as a granular filling material and compare their performances with untreated Poraver((R)) particles. While no notable improvement in mechanical behavior was observed on the single-particle level, bulk tests showed promising results in terms of compressibility and abrasion resistance of coated particles compared to untreated ones.
Article
Engineering, Chemical
Isik Sena Akgun, Enis Demir, Murat Isik, Nadin Ekmekciyan, Erkan Senses, Can Erkey
Summary: Alginate aerogel particles were successfully coated with a copovidone and hydroxypropyl cellulose based polymer in a Wurster fluidized bed. The results indicate that the pores of aerogels were not damaged during the process. Changing bed temperature led to significant changes in coating thickness whereas both bed temperature and atomizing pressure affected coating layer surface morphology. The smoothest coating layer surface and the highest coating efficiency were achieved at 50 degrees C with 1.7 bar atomizing pressure.
Review
Engineering, Chemical
Yinqiang Song, Tuo Zhou, Ruiqi Bai, Man Zhang, Hairui Yang
Summary: Wet fluidized bed granulation and coating processes are widely used in the pharmaceutical and food industries. The complex gas-solid flow and heat and mass transfer in these processes make it difficult to have complete control over the apparatuses. Computational fluid dynamics coupled with the discrete element method (CFD-DEM) provides a useful tool to study the gas-solid hydrodynamics of these processes. This review introduces the theory of CFD-DEM, its application in simulating wet fluidized bed granulation and coating, and discusses its role in resolving issues and future developments.
Article
Engineering, Chemical
Alexandr G. Lipin, Andrey A. Lipin, Ryszard Wojtowicz
Summary: A new model for the fluidized bed coating process is presented in this study, which allows for predicting the degree of coverage of solid particles. Analytical solutions of model equations for batch apparatus and continuous apparatus in steady-state mode were obtained, and a numerical solution algorithm for multistage apparatus was developed. A physical experiment on a laboratory scale installation was conducted to identify the parameters and verify the adequacy of the developed mathematical model, showing good agreement between the modeling and the measurements.
Article
Environmental Sciences
Gongduan Fan, Yiqing Song, Mingqian Xia, Yifan You, Jianyong Zou, Qi Wei
Summary: A fluidized bed photoreactor (FBPR) with an external magnetic field was designed and constructed for algae removal. The photoreactor, using magnetic photocatalyst and under optimal operating conditions, achieved effective removal of algae cells within 6 hours and maintained a 90% removal efficiency after 18 hours of continuous operation. Furthermore, the FBPR showed certain advantages even when humic acid was added to simulate actual water environment. It is characterized by high availability, low cost, and low energy consumption.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Chemical
Jia Wei Chew, W. Casey Q. LaMarche, Ray A. Cocco
Summary: As we celebrate the 100th anniversary of the commercialization of the fluidized bed reactor, it is evident that fluidized bed technology has undergone significant advancements in the past century. With the development of sophisticated models, experimentation techniques, and statistical tools, as well as the utilization of computational platforms and AI, the application of fluidized bed technology is expected to become more cost-effective and efficient.
Article
Engineering, Chemical
S. Madlmeir, T. Forgber, M. Trogrlic, D. Jajcevic, A. Kape, L. Contreras, A. Carmody, P. Liu, C. Davies, A. Sarkar, J. G. Khinast
Summary: This study investigates the drying and losses of spray droplets during the coating process of medicines. By using simulation and experiments, the researchers propose solutions to reduce coating losses and improve coating yield, leading to significant time savings.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Cong Wang, Daoyin Liu, Jiliang Ma, Cai Liang, Xiaoping Chen
Summary: Particle coating in fluidized beds is a widely used technique. In this study, the growth mechanisms of the coating shell on porous Al2O3 particles were investigated, including the effects of drying conditions and solution viscosities. The study revealed that the growth of the coating shell can be classified into three modes: layer growth, island growth, and irregular growth, with smaller droplet viscosity promoting layer growth.
Article
Materials Science, Ceramics
Alessio Zandona, Gundula Helsch, Aurina Martinez Arias, Alfred P. Weber, Joachim Deubener
Summary: Lithium aluminosilicate glass-ceramic powders were successfully synthesized by heat treating spray-dried sol-gel glassy nanobeads, resulting in the formation of quartz solid solution and keatite solid solution crystals with tunable coefficients of thermal expansion. The aerosol synthesis method was proven to be very versatile for producing glass-ceramic powders in the LAS system.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Composites
Magnus Gebhardt, Ioannis Manolakis, Gerhard Kalinka, Joachim Deubener, Souvik Chakraborty, Dieter Meiners
Summary: The study evaluated the potential of reusing recovered carbon fiber fabrics in manufacturing 2nd generation composite laminates, which showed an increase in damping attributed to a residual thermoplastic layer on the fibers. Additionally, the interfacial adhesion of the 2nd generation composites appears to be less influenced by the type of matrix used.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Jessica Loeschmann, Peter Fielitz, Gundula Helsch, Hansjoerg Bornhoeft, Daniel R. Cassar, Guenter Borchardt, Joachim Deubener
Summary: No viscosity change is expected near the crystal/melt interface during crystal growth in silicate systems at constant temperature. However, experimental studies have shown the formation of an interfacial zone with altered viscosity. In this investigation, single crystals of Li2O.Al2O3 center dot 4SiO(2) (LAS4) grew in a slightly alumina deficient base glass, and the viscosity of the interfacial zone was found to be significantly lower than that of the base glass.
Article
Geochemistry & Geophysics
Alex Scarani, Alessandro Vona, Danilo Di Genova, Raschid Al-Mukadam, Claudia Romano, Joachim Deubener
Summary: This study tests the reliability of extrapolating the cooling rate of glasses using a combination of conventional and flash differential scanning calorimetry. The results show that a non-Arrhenius model better captures the cooling rate values, especially when significant extrapolation is required. A practical guide for estimating the cooling rate using DSC is presented.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Materials Science, Ceramics
Peter Fielitz, Daniel R. Cassar, Nikolay S. Yuritsyn, Alexander S. Abyzov, Vladimir M. Fokin, Guenter Borchardt, Joachim Deubener
Summary: Isolated Na2O dot 2CaO dot 3SiO(2) (NC2S3) single crystals were grown at temperatures above the glass transition. The enrichment of Na in the continuous solid solution upon crystallisation causes a depletion of soda in the growing interfacial diffusion zone, resulting in a change in viscosity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Lina Heuser, Marianne Nofz, Ralf Mueller, Joachim Deubener
Summary: This study investigated the thermally stimulated interactions between silver and glass, revealing that silver dissolves in glass only in traces and precipitates as metallic silver. The experimental observations provide insights into the dissolution and precipitation processes of silver in glass.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2023)
Article
Materials Science, Ceramics
Alessio Zandona, Erwan Chesneau, Gundula Helsch, Aurelien Canizares, Joachim Deubener, Valerie Montouillout, Franck Fayon, Mathieu Allix
Summary: SiO2-TiO2 glasses produced by aerodynamic levitation coupled to laser heating or by sol-gel spray-drying were compared to highlight their structural differences. The presence of water in gel-derived glasses led to partial network depolymerization, increasing the solubility of TiO2. However, complete dehydration proved challenging due to a tendency towards devitrification during heating.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Geochemistry & Geophysics
Danilo Di Genova, Dmitry Bondar, Alessio Zandona, Pedro Valdivia, Raschid Al-Mukadam, Hongzhan Fei, Anthony C. Withers, Tiziana Boffa Ballaran, Alexander Kurnosov, Catherine McCammon, Joachim Deubener, Tomoo Katsura
Summary: The melt viscosity of anhydrous and hydrous peridotite was studied using various techniques, including micropenetration viscometry, conventional DSC, flash DSC, and Brillouin spectroscopy. Raman spectroscopy measurements confirmed the absence of crystallization and degassing during high-temperature measurements, ensuring accurate data for crystal-free melt viscosity. An accurate description of peridotite melt viscosity was provided over a wide range of compositions and oxidation states. Due to variations in empirical models, a new model for temperature- and H2O-dependent viscosity was developed for peridotite melts (up to 12 mol% H2O content).
Article
Chemistry, Multidisciplinary
Alessio Zandona, Emmanuel Veron, Gundula Helsch, Aurelien Canizares, Joachim Deubener, Mathieu Allix, Cecile Genevois
Summary: This study provides new insights into the crystallization mechanism of gel-derived SiO2-TiO2 glasses, with the first direct observation of subcritical nuclei by in situ high-temperature TEM. It confirms the crucial role of medium-range compositional fluctuations and Ostwald's rule of stages in crystal nucleation in undercooled melts and glasses.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Materials Science, Ceramics
J. O. Fritzsche, B. Ruedinger, J. Deubener
Summary: A Zr4+-containing sodium borosilicate glass (ZNBS) and a zirconium-free reference glass (NBS) were prepared by melt quenching. Thermal analysis revealed phase separation into boron- and silica-rich domains in both glasses. Annealing initiated the coarsening of these domains and the precipitation of t-ZrO2 in ZNBS glass. The coarsening kinetics of the silica-rich domains followed theoretical predictions, while the coarsening of t-ZrO2 crystallites was slower and confined by the domain structure.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
T. Murata, S. Nakane, H. Yamazaki, R. Al-Mukadam, J. Deubener
Summary: The heterogeneous crystal nucleation of five glasses between lithium disilicate and lithium metasilicate was studied using differential scanning calorimetry (DSC) and high-temperature optical microscopy (HTOM). The crystal nucleation rate was highest for a glass with about 63 mol% silica, and the first crystallite consisted of intergrown lithium metasilicate and quartz. Primary crystallization of lithium disilicate was observed, treated as an oxygen-related artifact. The viscosity at the maximum nucleation rate was almost constant for each glass, while the liquidus temperature calculated from thermodynamic properties was lower than that extrapolated from DSC measurements.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Alessio Zandona, Victor Castaing, Alexander Shames, Gundula Helsch, Joachim Deubener, Ana Isabel Becerro, Mathieu Allix, Adrian Goldstein
Summary: An ultrabasic invert silicate glass was synthesized and used as host for transition metal dopants. Characterization techniques were employed to investigate the oxidation and coordination states of the dopants. Different dopants exhibited different oxidation states, with some displaying only their maximum oxidation state and others showing mixed valences. Reduction of oxygen content in the melting atmosphere led to the conversion of Cr6+ to Cr3+.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Peter Fielitz, Gundula Helsch, Guenter Borchardt, Joachim Deubener
Summary: Although TiO2 is commonly used as a nucleating agent in the production of aluminosilicate glass-ceramics, its role as a catalyst for the nucleation of the functional crystal is still unclear. This study investigates the mobility of Ti, Al, and O in an albite melt, which serves as a surrogate for lithium and magnesium aluminosilicate glass-ceramic compositions. The results suggest a preferential structural linkage between Al and Ti species in the network structure of aluminosilicate melts.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Jekaterina Sydorenko, Arvo Mere, Malle Krunks, Marina Krichevskaya, Ilona Oja Acik
Summary: This study focuses on the development of low-material-quantity, transparent, anatase TiO2 nanoparticle free thin films as photocatalytic materials and their photocatalytic activity under UV-A and VIS light for indoor air pollution control, showing promising potential for VOC removal.
Article
Environmental Sciences
Alex Scarani, Alessio Zandona, Fabrizio Di Fiore, Pedro Valdivia, Rizaldi Putra, Nobuyoshi Miyajima, Hansjorg Bornhoft, Alessandro Vona, Joachim Deubener, Claudia Romano, Danilo Di Genova
Summary: Nanocrystallization in basalt melts and glasses can be triggered by undercooling-driven oversaturation in TiO2 and FeO, which can affect viscosity measurements and magma dynamics during decompression. Recent studies have shown that volcanic glasses can have nanoscale heterogeneities, which can develop both in the laboratory and during magma eruptions. This study identifies the total transition metal oxide content as a crucial factor governing the nanolitization tendency of basalt melts and glasses and discusses the different eruptive styles of Mt. Etna and Stromboli.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)