Article
Nanoscience & Nanotechnology
Xingjie Wang, Zoha H. Syed, Zhihengyu Chen, J. David Bazak, Xinyi Gong, Megan C. Wasson, Nancy M. Washton, Karena W. Chapman, Justin M. Notestein, Omar K. Farha
Summary: In order to increase catalytic efficiency, researchers have successfully introduced a redox-active heterometallic Ce12V6-oxo cluster into mesoporous silica material SBA-15, demonstrating improved structural integrity and higher reactivity, which provides new insights for catalyst design and applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
J. J. Ternero-Hidalgo, M. Daturi, G. Clet, P. Bazin, M. A. Banares, R. Portela, M. O. Guerrero-Perez, J. Rodriguez-Mirasol, T. Cordero
Summary: Simultaneous operando Raman and transmission FTIR spectroscopic measurements were used to study the structure-activity relationships of V-Zr-O catalysts during propane oxidative dehydrogenation. The combination of both spectroscopies allowed the identification of reaction intermediates and provided structural information about the catalyst. The results suggested a Mars-van Krevelen mechanism and showed higher activity of bridging oxygen sites than terminal V--O bonds.
Article
Chemistry, Physical
Namgi Jeon, Okkyun Seo, Jungmok Oh, Jisu Park, Iljun Chung, Jaemyung Kim, Osami Sakata, Akhil Tayal, Yongju Yun
Summary: The presence of V component enhances the catalytic performance of alumina-supported Co-V oxide catalysts for propane dehydrogenation by improving the reducibility of Co nanoparticles and increasing the surface concentration of metallic Co species. The results suggest that V component plays a significant role in modifying the properties of Co oxides and improving their catalytic performance.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Junting Huang, Qirui Liu, Panpan Li, Yuanrui Ying, Shanshan Chai, Qiuhong Cui, Yijun Yang, Xi Wang
Summary: Ni-doped vanadium catalyst achieves high propylene selectivity and productivity by regulating the micro-structure.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Engineering, Chemical
Pantita Trongjitraksa, Yoottapong Klinthongchai, Piyasan Praserthdam, Bunjerd Jongsomjit
Summary: This research investigates the catalytic activity of WO3 on SBA-15 and MCF-Si supports. The findings suggest that the three-dimensional mesocellular foam structure of MCF-Si and the incipient wetness impregnation of WO3 are crucial for obtaining a highly dispersed WO3 catalyst. Additionally, the high Lewis to Bronsted ratio of tungsten on silica is important for the catalytic dehydration of ethanol to ethylene.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Applied
Christopher M. A. Parlett, Hamidreza Arandiyan, Lee J. Durndell, Mark A. Isaacs, Antonio Torres Lopez, Roong J. Wong, Karen Wilson, Adam F. Lee
Summary: The article demonstrates a method for continuous flow synthesis of SBA-15 at high yield at 80 degrees C using a simple tube reactor. The resulting SBA-15 exhibits excellent textural properties and far higher productivity than previously reported in batch or flow synthesis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xin-Peng Guo, Xiao-Xiao Wang, Hai-Qiang Lu, Zhen-Min Liu
Summary: Vanadium oxide incorporated mesoporous silica (V-m-SiO2) was synthesized using a surfactant-modified sol-gel method. The catalyst contained monomeric [VO4] sites and a high proportion of strongly interacting vanadium oxide species with silica. Compared to traditional impregnation method, the V-m-SiO2 catalyst showed superior ability to catalyze the oxidative dehydrogenation of propane to propylene, which can be attributed to its unique preparation method and favorable geometric and electronic properties.
Article
Engineering, Chemical
Qiao Chen, Lidan Deng, Zewei Wu, Fang Wang, Xingmao Jiang
Summary: In this study, Pt-Ga/SBA-15 catalysts were prepared and showed high activity and stability for propane dehydrogenation. The formation of Pt-Ga alloy played an important role in enhancing the catalytic performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Applied
Luis M. M. Correia, Mohamed M. A. Soliman, Carlos M. Granadeiro, Salete S. Balula, Luisa M. D. R. S. Martins, Armando J. L. Pombeiro, Elisabete C. B. A. Alegria
Summary: The neutral trichloro[hydrotris(1-pyrazolyl)methane]vanadium(III) C-scorpionate complex was immobilized on amine-functionalized mesoporous silica to form a composite, which showed higher catalytic performance in peroxidative oxidation of benzyl alcohol compared to the analogous homogeneous complex. Various parameters were studied, leading to overall yields of around 60% and high turnover numbers. The composite also exhibited good recyclability and structural stability, making it a promising catalyst for other oxidative reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Yilin Huang, Jia Wang, Mengwei Li, Zhixiong You
Summary: CS2C@SBA-3 is a promising composite material for efficient remediation of vanadium water pollution, showing superior adsorption performance and selectivity. It can be used repeatedly in real water samples with excellent removal efficiency.
Article
Optics
Sakthivel Kumaravel, Sivakumar Thiripuranthagan, Thanigaivel Vembuli, Elangovan Erusappan, Mathivanan Durai, Thamaraiselvi Sureshkumar, Mani Durai
Summary: Mesoporous SBA-15 and x% WO3-SBA-15 catalysts were synthesized by a hydrothermal in-situ method and characterized using various analytical techniques. Among the catalysts, 5.5% WO3-SBA-15 exhibited the highest photocatalytic activity for the degradation of RhB, MB, and CV dyes under visible light irradiation. The trapping experiment confirmed that h(+) and O-2(center dot-) were the major species responsible for the photocatalytic degradation over 5.5% WO3-SBA-15 catalysts.
Article
Environmental Sciences
Zeinab Ezzeddine, Isabelle Batonneau-Gener, Yannick Pouilloux
Summary: The removal of zinc ions from water was studied using two types of ordered mesoporous silica (SBA-15 and SBA-16). Both materials were modified with APTES and EDTA through post grafting methods. The modified adsorbents were characterized by various analytical techniques, and the structural integrity was maintained. Optimal adsorption conditions and maximum adsorption capacity were determined through experimental tests, and the regenerated adsorbent showed no significant decline in adsorption efficiency.
Article
Physics, Applied
Fnu Gorky, Shelby R. Guthrie, Courtney S. Smoljan, James M. Crawford, Moises A. Carreon, Maria L. Carreon
Summary: The mesoporous SBA-15 silica material demonstrated significantly higher efficiency in synthesizing ammonia through atmospheric dielectric barrier discharge plasma, mainly due to its hierarchically ordered pore structure that facilitates the diffusion of plasma discharge into the pores.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Applied
Vahide Nuran Mutlu, Selahattin Yilmaz
Summary: The glycosidation of glucose with n-butanol was studied using sulphated Zr and tungstophosphoric acid incorporated SBA-15 catalysts, showing improved acidity and higher yields of butyl glucoside. The TPA-SBA-15 catalyst demonstrated the highest activity and selectivity, with stable and reusable performance. Further studies on reaction temperature and catalyst amount were conducted to optimize the reaction parameters.
Article
Chemistry, Applied
Changhao Yan, Shouteng Zheng, Na Chen, Shouqi Yuan, Yao Chen, Bing Li, Yunlei Zhang
Summary: Novel acid-base bi-functional mesoporous SBA-15 catalysts with four morphologies were synthesized by Mg incorporation and sulfated zirconia (SZ) grafting, showing significant improvement in base strength and effective Bronsted/Lewis acid strength. The catalysts could be applied to fructose conversion into 5-hydroxymethylfurfural (5-HMF) with a high yield of 98.6%, providing an economical and feasible method for large-scale biomass conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Francesco Conte, Alberto Villa, Laura Prati, Carlo Pirola, Simona Bennici, Gianguido Ramis, Ilenia Rossetti
Summary: The photoreduction of CO2 to valuable chemicals using innovative photoreactors was investigated in this study. By overcoming the low solubility of CO2 in water, the overall productivity was improved. The addition of titania catalysts functionalized with either monometallic or bimetallic cocatalysts resulted in the production of hydrogen, formic acid/formate, formaldehyde, and methanol. The pH of the reaction system influenced the distribution of the products. Moreover, using noble metals as cocatalysts increased the productivity, while using bimetallic cocatalysts reduced the cost of the catalytic material.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Ferenc Martinovic, Sabrina Ballauri, Nicola Blangetti, Samir Bensaid, Raffaele Pirone, Barbara Bonelli, Marco Armandi, Fabio Alessandro Deorsola
Summary: Solid state ion exchange was successfully used to introduce Fe cations into the small pore CHA structured SSZ-13 zeolite. Characterization of the produced catalysts revealed highly dispersed and heterogeneous Fe sites, with the type depending on the Al distribution in the zeolite. Dimeric Fe species formed preferentially at the start of the exchange, while isolated cations were formed once Al exchange sites were fully saturated.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Ilenia Rossetti, Antonio Tripodi, Matteo Tommasi, Gianguido Ramis
Summary: This study presents a simulation of a plant that uses renewable waste biomass to produce hydrogen and ammonia. The biomass is converted into hydrogen through a gasification reactor and then purified and treated to maximize hydrogen yield. The final result is a significant amount of ammonia with a purity of 98.8%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Antonio Tripodi, Renato La Pietra, Matteo Tommasi, Ilenia Rossetti
Summary: This study presents a finite element numerical model for the separation of N2-O2-CO2 using hollow fiber membranes in medium-scale coal-fired power plants. The model considers not only the membranes but also compressors and condensers. Two process layouts are evaluated, and the results show that the recirculating scheme achieves superior enrichments. The degree of purification is mainly influenced by the enrichment-side pressure, while the CO2 concentration depends on the CO2:N2 selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Tanveer A. Gadhi, Imtiaz Ali Bhurt, Tayyab A. Qureshi, Imran Ali, Anira Latif, Rasool Bux Mahar, Najeebullah Channa, Barbara Bonelli
Summary: In this study, 3D-structured clay filters were prepared and coated with iron-doped titanium dioxide (Fe-TiO2) using 3D printing and sol-gel soaking and calcination techniques. The coated filters showed uniform coatings of round-shaped Fe-TiO2 on the tiny pore of the clay filter, and had an optical energy band gap of around 2.8 eV. The Fe-TiO2-coated clay filters exhibited high denitrification efficiency and photocatalytic degradation performance for indigo carmine dye.
Article
Chemistry, Physical
Stefano Gervasi, Nicola Blangetti, Francesca S. S. Freyria, Salvatore Guastella, Barbara Bonelli
Summary: For the first time, Fe-doping was performed on high-surface-area anatase/brookite TiO2 through a simple sol-gel synthesis and mild temperature calcination. The Fe doping affected the crystallite growth and cell volume of the brookite phase. It also increased the specific surface area and decreased the bandgap energy. The photocatalytic degradation of simazine was improved by Fe doping under both UV and simulated solar light.
Article
Chemistry, Physical
Nicola Blangetti, Francesca S. Freyria, Maria Chiara Calviello, Nicoletta Ditaranto, Salvatore Guastella, Barbara Bonelli
Summary: The photocatalytic degradation of paracetamol in aqueous solution was studied using four commercial TiO2 powders under 1 SUN. The anatase and brookite powders showed higher activity than P25, while rutile powder showed low activity. Surface impurities likely derived from K3PO4 significantly affected the activity of the anatase powder, while the presence of Cl at the surface of rutile did not affect its activity much. The high activity of brookite powder was attributed to its physicochemical properties including band structure and particle size.
Article
Chemistry, Applied
Clarissa Cocuzza, Enrico Sartoretti, Chiara Novara, Fabrizio Giorgis, Samir Bensaid, Nunzio Russo, Debora Fino, Marco Piumetti
Summary: A set of Cu-Mn oxides was synthesized using solution combustion synthesis method with varying copper and manganese ratios. The physico-chemical properties of the samples were investigated with various techniques, and the catalysts were tested for total VOC oxidation. The best performance was achieved with a copper content ranging from 15 at % to 45 at%, and the catalysts exhibited good stability and low water vapor inhibition.
Article
Energy & Fuels
Matteo Tommasi, Francesco Conte, Mohammad Imteyaz Alam, Gianguido Ramis, Ilenia Rossetti
Summary: The photocatalytic reduction of CO2 into solar fuel is a promising approach to solve the energy crisis and mitigate environmental pollution. We have developed a simple and scalable method to immobilize TiO2 P25 on glass slides using an organic-based surfactant. This method shows great potential for producing solar fuel.
Article
Materials Science, Biomaterials
Clarissa Cocuzza, Elena Antoniono, Carminna Ottone, Valentina Cauda, Debora Fino, Marco Piumetti
Summary: This study aims to obtain a stable and active biocatalyst for drug screening purposes. By immobilizing hLDH-A enzyme on functionalized mesoporous silica, the researchers successfully achieved a stable biosensor for anticancer drugs. The immobilized enzyme showed high yields and retained activity, as well as good stability under certain conditions.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Mallikarjun Madagalam, Mattia Bartoli, Michele Rosito, Nicola Blangetti, Marco Etzi Coller Pascuzzi, Elisa Padovano, Barbara Bonelli, Sandro Carrara, Alberto Tagliaferro
Summary: To deepen the understanding of electron transfer at the electrochemical interface, the performance of ZnxNi1-xFe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1) nanomaterials in electrochemical sensing was studied. Nanomaterials were synthesized using a simple autocombustion synthesis procedure. The ZnFe2O4 sensor showed the best performances in terms of rate constant, peak-to-peak separation, sensitivity, and detection limit. Nanomaterials energy bands mapping with the experimental redox potentials was performed to predict electron transfer. The importance of surface states/defects in the electron transfer mechanism was highlighted.
Article
Energy & Fuels
Antonio Tripodi, Renato La Pietra, Matteo Tommasi, Ilenia Rossetti
Summary: Capturing CO2 from point emission sources is an urgent task to mitigate the environmental impact of the power generation sector and hard-to-abate industries. This work demonstrates the modeling steps for CO2 absorption using a mixed amine-water solvent, highlighting the importance of selecting thermodynamic parameters that strike a balance between physical and chemical equilibria.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Chemistry, Physical
Hanggara Sudrajat, Ilenia Rossetti, Juan Carlos Colmenares
Summary: Catalytically reducing CO2 offers an effective way to produce energy-rich fuels and high-value chemicals while simultaneously sequestrating CO2 from the environment. Piezocatalysis, which uses mechanical stress to drive the reduction reaction, is a promising method that doesn't require external heating or sacrificial compounds.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Engineering, Chemical
Ilenia Rossetti
Summary: Heat and power cogeneration plants based on fuel cells are interesting systems for energy conversion with low environmental impact. The development of commercial systems based solely on experimental activities is time-consuming, and accurate models are needed to control the operation of fuel cells and prevent damage. This review discusses modelling methods for fuel cells, highlighting different approaches and key aspects to be considered.
Article
Chemistry, Physical
Francesco Conte, Ilenia Rossetti, Gianguido Ramis, Cyril Vaulot, Samar Hajjar-Garreau, Simona Bennici
Summary: This study investigates photo-catalysts based on titanium dioxide modified with highly dispersed metallic nanoparticles. The physico-chemical properties and catalytic behavior of these catalysts in various photo-synthetic processes were analyzed. The results show that catalysts containing platinum or bi-metallic materials exhibit the highest activity and productivity. The metal functions as an electron sink and contributes to the optoelectronic properties of the catalysts.
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.