Review
Engineering, Environmental
Naomi A. Bury, Kathryn A. Mumford, Geoffrey W. Stevens
Summary: Electrochemical regeneration of Granular Activated Carbon is an efficient method for removing organic contaminants from water. By controlling critical operating parameters and understanding the regeneration mechanisms, optimal operating conditions can be achieved, enhancing the commercial prospects of these technologies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Paola S. Pauletto, Marc Florent, Teresa J. Bandosz
Summary: In this study, the effect of surface chemistry on the adsorption of perfluorooctanesulfonic acid (PFOS) was investigated by modifying commercial activated carbon and high porosity carbon black. The results showed that positively charged centers located in mesopores of high volumes are the most important features granting high adsorption capacity of carbons for PFOS removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Giacomo de Falco, Marc Florent, Teresa J. Bandosz
Summary: Four types of as-received carbon black samples with different surface areas were tested as oxygen reduction catalysts in an alkaline environment. The onset potential, electron transfer number, and kinetic current density were selected as the main performance indicators. Despite having a smaller onset potential than Pt/C, the electron transfer number and kinetic current density of the carbon black samples reached similar values. The results demonstrated a linear dependence between the onset potential and electron transfer number and the surface area/porosity. The carbon black sample with the highest porosity exhibited excellent catalytic behavior due to its developed ultramicropores, which facilitated oxygen adsorption and further reduction.
Article
Chemistry, Physical
Paola S. Pauletto, Marc Florent, Teresa J. Bandosz
Summary: This study tested commercial activated carbon, carbon black, and zirconium-based metal-organic framework as adsorbents for perfluorooctanesulfonic acid (PFOS). The results showed that carbon black was the most effective adsorbent due to its large mesopores and hydrophobic nature.
Article
Engineering, Chemical
Michelle Finn, Gabrielle Giampietro, David Mazyck, Regina Rodriguez
Summary: This study successfully demonstrated the rapid adsorption of ibuprofen using coconut-based activated carbon, showing its potential as a point-of-entry treatment option for removing pharmaceuticals in toilets. The introduction of other compounds to the solution did not significantly impact the adsorption of ibuprofen, further supporting its application at the point-of-entry.
Article
Environmental Sciences
Adriana Moral-Rodriguez, Roberto Leyva-Ramos, Esmeralda Mendoza-Mendoza, Paola E. Diaz-Flores, Damarys H. Carrales-Alvarado, Maria F. Alexandre-Franco, Carmen Fernandez-Gonzalez
Summary: The textural and physicochemical characteristics of commercial activated carbons have a significant impact on their adsorption capacity for ronidazole and diclofenac. Coconut AC and Wood AC exhibit the highest adsorption capacity for RNZ and DCF at pH=7. The adsorption mechanism is mainly driven by π-π stacking interactions, and the presence of acidic sites enhances the adsorption capacity. The adsorption of RNZ on Coconut AC is irreversible, while the adsorption of DCF on Wood AC is reversible.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Engineering, Environmental
Paola S. Pauletto, Teresa J. Bandosz
Summary: This review focuses on recent research results on the adsorption of PFAS on activated carbons and metal-organic frameworks. It highlights the potential for further modifications of activated carbons to enhance PFAS adsorption, and the unique features of metal-organic frameworks in providing acid-base complexation and specific interaction sites.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Thermodynamics
Sai Yagnamurthy, Dibakar Rakshit, Sanjeev Jain, Kaiser Ahmed Rocky, Md. Amirul Islam, Bidyut Baran Saha
Summary: This study investigates the cooling performance of Maxsorb-III activated carbon composites synthesized with the additives of H25 Graphene nanoplatelets, 1-Hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ionic liquid with polyvinyl alcohol for R32 refrigerant-based adsorption cooling applications. The kinetic characteristics and heat of adsorption assessments are evaluated, and a holistic comparison of the cooling performances of the composites is proposed.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Han Yul Park, Minhu Huang, Tae-Ho Yoon, Kyung Hun Song
Summary: Activated carbon monoliths of kenaf (ACMKs) were prepared at different pyrolysis temperatures, characterized through various techniques, and tested electrochemically. The results showed that ACMK pyrolyzed at 500 degrees C exhibited the highest specific capacitance and energy density among the samples tested. The study provides insights into the preparation and electrochemical properties of ACMKs for potential energy storage applications.
Article
Thermodynamics
Sai Yagnamurthy, Dibakar Rakshit, Sanjeev Jain, Kaiser Ahmed Rocky, Md Amirul Islam, Bidyut Baran Saha
Summary: Novel activated carbon-based composite adsorbents were studied for thermophysical properties and adsorption characterization with difluoromethane refrigerant, demonstrating significantly higher thermal diffusivities and thermal conductivity in the perpendicular plane of the composites. The adsorption uptake characteristics were gravimetrically studied in the temperature range of 30-70 degrees C, leading to significant enhancements in volumetric cooling energy up to 78% over that of powdered activated carbon. Successful fitting of Dubinin-Astakhov and Toth models for the adsorption isotherms was observed, with the D-A model offering better fits.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Review
Chemistry, Multidisciplinary
Nitin Muttil, Saranya Jagadeesan, Arnab Chanda, Mikel Duke, Swadesh Kumar Singh
Summary: The storage of waste tyres poses significant environmental and health risks, especially when they are left untreated in stockpiles and landfills. By subjecting waste tyres to pyrolysis and activation, activated carbon can be produced and utilized for various applications, such as wastewater treatment, metal and dye removal, energy storage devices, and electrode materials. The use of waste tyres for activated carbon production is a sustainable alternative to conventional sources, supporting the concept of a circular economy.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Ismaila Olalekan Saheed, Wen -Da Oh, Faiz Bukhari Mohd Suah
Summary: This study investigated the removal of hydrophilic imidazolium-based ionic liquid from aqueous solution using chitosan-activated carbon composite (CH-AC). The experimental data analyzed using Langmuir and Freundlich isotherms fitted best into Langmuir model, and the adsorption capacity of CH-AC for [BMIM][Br] was calculated to be 12.17 mg/g. Adsorption kinetics fitted into pseudo-second order model.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Amir Sada Khan, Taleb H. Ibrahim, Mustafa I. Khamis, Paul Nancarrow, Jibran Iqbal, Inas AlNashef, Nabil Abdel Jabbar, Muhammad Faheem Hassan, Farouq Sabri Mjalli
Summary: The study modified powder activated carbon with ionic liquid and sodium alginate, resulting in AC-Alg-IL beads with high adsorption capacity for phenol. Theoretical models showed that pseudo-second-order kinetic and Freundlich isotherm models were suitable for describing the adsorption process. The interaction between phenol and AC-Alg-IL beads was analyzed using the COSMO-RS model, concluding that AC-Alg-IL beads can efficiently adsorb phenol and other organic compounds.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biochemistry & Molecular Biology
Ismaila Olalekan Saheed, Enis Nadia Md Yusof, Wen-Da Oh, Megat Ahmad Kamal Megat Hanafiah, Faiz Bukhari Mohd Suah
Summary: This study investigated the adsorption efficiency of a duo-material blend, including powder (C-emimAc), bead (CB-emimAc), and sponge (CS-emimAc), for the removal of Cd(II) from aqueous solution. The chitosan@activated carbon (Ch/AC) blend was developed using a green ionic solvent and its characteristics were examined. The interactions between the composites and Cd(II) were analyzed, and it was found that the composites showed good adsorption capacity and stability for Cd(II) adsorption.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Masoud Jahandar Lashaki, Samineh Kamravaei, Zaher Hashisho, John H. Phillips, David Crompton, James E. Anderson, Mark Nichols
Summary: The impact of activated carbon porosity on adsorption-desorption performance was investigated, with higher porosity resulting in higher VOC uptake and longer adsorption breakthrough time. Additionally, activated carbons with higher porosity showed faster kinetics in both adsorption and desorption processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Yukuan Duan, Lifen Liu
Summary: The Z-scheme ternary heterojunction of g-C3N4 and BiOI co-modified with Bi2WO6 (BCB) was prepared to enhance photocatalyst activity. The optimized doping ratios of 3 wt% BiOI/10 wt% g-C3N4/Bi2WO6 exhibited excellent catalytic performance in degrading rhodamine B (RhB) under visible light irradiation, achieving almost complete degradation in 30 minutes and a high reaction kinetic constant of 0.245 min(-1). The catalyst showed good stability and removal effect for different concentrations of tetracycline (TC), indicating its potential application in pollution control.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Nuclear Science & Technology
Jawaria Ahad, Talha Rizwan, Amjad Farooq, Khalid Waheed, Masroor Ahmad, Kamran Rasheed Qureshi, Waseem Siddique, Naseem Irfan
Summary: The filtered containment system is a passive safety system used to control over-pressurization of containment in design-based accidents by venting a high-pressure mixture of air, steam, and radioactive gases, such as iodine, through a scrubbing system. A lab-scale facility was developed to study iodine removal using a venturi scrubber, simulating accidental scenarios. A modified mathematical model was proposed to improve the efficiency of iodine removal by considering important parameters that were not previously included. Experimental results showed that removal efficiency increased with liquid level height and gas flow rate up to an optimum point before decreasing. The maximum removal efficiency achieved was 99.8%.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaocong Zhong, Xianliang Yi, Fanqi Cheng, Huiyan Tong, Weiping Xu, Xiaojing Yang
Summary: There is a growing concern about plastic pollution and its impact on both health and ecology. This study investigated the release of di-2-ethylhexyl phthalate (DEHP), a common plastic additive, from different types of plastics into seawater. The results showed that the leaching potentials of DEHP varied among the selected plastics, with polyethylene mulch having the highest leaching potential and PBAT/PLA bags having the lowest. The study also assessed the potential environmental and human exposure risk of the leached DEHP, indicating low pollution risks in seawater.
Article
Biochemical Research Methods
Jean-Baptiste Chagnoleau, Ines L. D. Ryan, Ryan Khedher, Joao AP Coutinho, Thomas Michel, Xavier Fernandez, Nicolas Papaiconomou
Summary: A study was conducted on ternary biphasic systems composed of heptane, 1-butanol or ethyl acetate, and type III or type V deep eutectic solvents based on levulinic acid and choline chloride or thymol. The binodal curves, densities, and phase compositions of the equilibrium phases were determined for seven systems. The partition coefficients of six natural compounds were measured in these systems. Based on the results, a system composed of heptane, 1-butanol, and the deep eutectic solvent choline chloride:levulinic acid at a molar ratio of 1:3 was selected for centrifugal partition chromatography and showed good separation of apigenin, coumarin, beta-ionone, and alpha-tocopherol.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Multidisciplinary
Nicolas Papaiconomou, Jean-Pierre Magnin, Isabelle Billard
Summary: This study investigated the selective extraction of lignin residues, polysaccharides, and organic acids from black liquor using the ionic liquid trihexyltetradecylphosphonium chloride ([P-66614]Cl) commonly found in the pulp industry. Optimized conditions for extracting lignin residues while leaving polysaccharides and organic acids in aqueous solution were determined using a response surface methodology. Results showed that under these optimized conditions, 84.8% of lignin residues and 66.0% of polysaccharides were extracted, while no extraction of organic acids occurred.
Article
Chemistry, Physical
Haiwei Yang, Lvzhu Cheng, Qiliang Yang, Amjad Farooq, Lili Ying, Peng Wang, Zongqian Wang
Summary: The integration of natural textiles and MXene has great potential for the development of wearable thermal management materials. However, the susceptibility of MXene to oxidation and the weak interaction between MXene and fibers pose challenges in fabricating MXene-decorated textiles with durable and stable thermal management performance. In this study, a novel surface modification strategy using natural sericin was proposed to protect MXene and enhance its stability. The fabricated MXene-coated silk fabrics not only demonstrated excellent thermal management performance, but also possessed superior breathability, laundry durability, and flame retardancy.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yuting Liu, Changfei Gao, Lifen Liu, Hongbo Wang
Summary: Abuse of antiviral drugs in natural water is a significant concern. In this study, a novel CuMn2O4@WO3/g-C3N4 ((CMNW)CN) cathode electrode was developed for the photoelectrocatalytic degradation of acyclovir in a Photo-Bio-Electro-Fenton (PBEF) system. The (CMNW)CN electrode exhibited excellent redox performance and efficient electron transfer efficiency. The study identified three degradation pathways and eight degradation intermediates, and confirmed the high degradation efficiency of acyclovir using the (CMNW)CN electrode within 30 minutes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Jing Wang, Ling Li, Baihui Chi, Jiajia Shan, Xianliang Yi, Yang Liu, Hao Zhou
Summary: The use of disinfectants made from quaternary ammonium compounds (QACs) has increased significantly since the outbreak of SARS-CoV-2. However, the effect of QACs on wastewater treatment performance remains unclear. This study investigated the effect of a commonly used QAC, benzyl dodecyl dimethyl ammonium bromide (BDAB), on nutrient removal in a moving-bed biofilm reactor (MBBR). The results showed that high BDAB concentrations significantly reduced ammonia removal efficiency and nitrate production rate constants, but the inhibition could be partially recovered by lowering the BDAB concentration. Metagenomic sequencing revealed different functional genera in the control and BDAB-added reactors, and analysis of functional genes suggested potential ecological risks associated with BDAB introduction in WWTPs.
Article
Materials Science, Textiles
Mengmeng Li, Qiuyu Xu, Wei Jiang, Amjad Farooq, Yirui Qi, Lifang Liu
Summary: In this study, Fe3O4 nanoparticles and graphene oxide (GO) are combined to form Fe3O4@reduced graphene oxide (rGO) composites. Cellulose nanofiber (CNF) and l-ascorbic acid are then added, and the mixture is freeze-dried to produce Fe3O4@rGO/CNF foams. The resulting foams exhibit improved electrical conductivity and magnetism, making them suitable for electromagnetic interference (EMI) shielding materials. The optimized foam shows an EMI shielding effectiveness value of approximately 23 dB in the X-band, thanks to the porous structure and composition of Fe3O4@rGO/CNF foams. This research provides a reference for the design and fabrication of novel EMI shielding materials.
FIBERS AND POLYMERS
(2023)
Article
Environmental Sciences
Rui Liu, Huan-Huan Yang, Hao Zhou, Xianliang Yi, Yang Liu
Summary: This study investigated the feasibility of MnO2 materials as particulate matter (PM) filtering media and clarified the effect of crystal structure on PM filtration. MnO2 with tunnel structure exhibited enhanced PM removal efficiencies compared to layered delta-MnO2.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Optics
Hexun Jiang, Mengfan Fu, Yixiao Zhu, Lilin Yi, Weisheng Hu, Qunbi Zhuge
Summary: Digital pre-distortion (DPD) is used to mitigate transmitter nonlinear distortion in optical transmissions. In this study, the identification of DPD coefficients is applied in optical communications for the first time using the direct learning architecture (DLA) with the Gauss-Newton (GN) method. The results show that the GN-based DLA outperforms the LS-based indirect learning architecture (ILA), especially in low signal-to-noise ratio scenarios.
Article
Nanoscience & Nanotechnology
Mengdie Hou, Mengjun Xu, Jiangtao Xu, Jiafeng Lu, Yi An, Liangjin Huang, Xianglong Zeng, Fufei Pang, Jun Li, Lilin Yi
Summary: We demonstrate the first simulation and experimental realization of decomposing cylindrical vector (CV) and orbital angular momentum (OAM) modes by reconstructing multi-view images of the projected intensity distribution. The use of deep learning-based stochastic parallel gradient descent (SPGD) algorithm allows for the retrieval of modal coefficients and optical field distributions with high efficiency and accuracy. The generated donut modes are experimentally decomposed into CV and OAM modes, with a purity of 99.5% for CV modes. Rapid switching of vortex modes is achieved by electrically driving the polarization controller. Our findings provide a convenient way to characterize and deepen the understanding of CV or OAM modes, with potential applications in information coding and quantum computation.
Article
Chemistry, Physical
Jun Wang, Jingjing Zhan, Hao Zhou, Xianliang Yi, Yang Liu
Summary: Tourmaline-LiCoO2 composites were synthesized and found to have high adsorption capacity for Pb2+. The optimal conditions for Pb2+ adsorption were determined to be 0.375 g tourmaline addition and sintering at 800 degrees C. The adsorption behavior of TM0.375LCO800 was influenced by solution pH and foreign cations, with Cu2+ and Zn2+ having the largest effect. XRD, ATR, SEM, TEM, UV-vis DRS, and XPS analysis revealed the physicochemical properties of the composites. The high-temperature transformation of tourmaline and LiCoO2 promoted Pb2+ removal. This study highlights the potential of tourmaline-LiCoO2 composites for heavy metal ion removal and provides scientific insights for future environmental applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Yukuan Duan, Chen Wang, Shilong Yang, Lifen Liu
Summary: Researchers doped single metal atom Co into the Z-type heterojunction of photocatalysts, which further enhanced their synergistic activity. The optimal Co doping at 0.2 wt% in the 10 wt% g-C3N4/Bi2WO6 heterojunction showed the highest efficiency in degrading RhB (at a concentration of 100 mg/L) under visible light irradiation (99.7% degradation in 30 min, kinetic rate constant 0.182 min(-1)). This single-atom doped catalyst (Co/g-C3N4/Bi2WO6) exhibited remarkable performance in treating practical wastewater in EC-MFC system (96% COD removal and 92.8% TOC removal).
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Review
Chemistry, Inorganic & Nuclear
Teng Li, Xuefeng Ren, Lifen Liu
Summary: This article summarizes and investigates the progress in the research of single-atom catalysts (SACs) in environmental applications and energy field. SACs have shown great potential in advanced oxidation processes, photocatalysis and photo-electrochemical systems, as well as fuel cells, with their performance depending on the metal element, support substrate, and coordination status shaped in preparation.
INORGANICA CHIMICA ACTA
(2024)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
