Article
Chemistry, Inorganic & Nuclear
Max Klotzsche, Davide Barreca, Lorenzo Bigiani, Roberta Seraglia, Alberto Gasparotto, Laura Vanin, Christian Jandl, Alexander Poethig, Marco Roverso, Sara Bogialli, Gloria Tabacchi, Ettore Fois, Emanuela Callone, Sandra Dire, Chiara Maccato
Summary: A cobalt complex bearing fluorinated diketonate ligands and a diamine moiety was investigated as a potential Co molecular precursor for the CVD of Co3O4 systems, showing suitability for high-quality Co3O4 thin film fabrication.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Mattia Benedet, Davide Barreca, Ettore Fois, Roberta Seraglia, Gloria Tabacchi, Marco Roverso, Gioele Pagot, Cristiano Invernizzi, Alberto Gasparotto, Alexandra A. Heidecker, Alexander Poehig, Emanuela Callone, Sandra Dire, Sara Bogialli, Vito Di Noto, Chiara Maccato
Summary: The coordination sphere engineering of three heteroleptic Ni(ii) beta-diketonate-diamine adducts was studied, and it was found that the chemico-physical characteristics of the compounds directly depend on the functional groups in the diketonate ligands. Preliminary thermal CVD experiments demonstrated the suitability of the precursors for the obtainment of NiO films with flat and homogeneous surfaces.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Evgeniia S. Vikulova, Ksenya I. Karakovskaya, Igor Yu. Ilyin, Evgenia A. Kovaleva, Dmitry A. Piryazev, Ludmila N. Zelenina, Sergey V. Sysoev, Natalia B. Morozova, Kseniya V. Zherikova
Summary: New data on the thermodynamic properties of a series of volatile iridium(i) complexes have been obtained, suggesting ways to estimate the difference in heat capacities between gas and crystal phases. The influence of different terminal groups on the volatility of the complexes was explained through detailed crystal packing analysis and quantum chemical calculation of crystal lattice energies. This study broadens our understanding of the relationship between the structure and thermal properties of volatile precursors, which is useful for further tuning effective compounds for metal-organic chemical vapor deposition purposes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Chao Zhang, Eva Tois, Markku Leskelae, Mikko Ritala
Summary: Area-selective ALD of Ir, Ru, and Rh with excellent substrate selectivity was achieved using metal beta-diketonates as precursors with O-2 or air as a coreactant. Native SiO2 and Ru were identified as growth surfaces, while low-k SiOC, Cu, Co, Al2O3, ZrO2, and HfO2 were identified as the nongrowth surfaces. UV irradiation effectively activated the low-k SiOC surface for noble metal growth without causing damage to the material.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Aleksandr S. Sukhikh, Samara Urkasym Kyzy, Asiya E. Turgambaeva, Denis P. Pishchur, Vladislav V. Krisyuk
Summary: An approach to design new lithium MOCVD precursors by modifying minor ligands is proposed. It is found that beta-ketoiminate ligand can greatly enhance the properties of volatile lithium complexes compared to beta-diketonate analogues. The structure and properties of two similar volatile lithium complexes with bulky ligands are compared, and it is discovered that they have similar molecular structures composed of tetrameric aggregates with a cubane-like Li4O4 core.
Article
Materials Science, Multidisciplinary
Davide Barreca, Lorenzo Bigiani, Max Klotzsche, Alberto Gasparotto, Roberta Seraglia, Christian Jandl, Alexander Pothig, Ettore Fois, Laura Vanin, Gloria Tabacchi, Marco Roverso, Sara Bogialli, Emanuela Callone, Sandra Dire, Chiara Maccato
Summary: Iron(III) oxide nanomaterials show great potential in various applications, and the versatile iron(II) precursor Fe(tfa)(2)TMEDA can be used to fabricate high purity iron oxide nanomaterials with metastable phase and tunable nano-organization. This precursor combines molecular stability, volatility, and clean decomposition, making it ideal for chemical vapor deposition (CVD) applications.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Christian Stienen, Julian Grahl, Christoph Woelper, Stephan Schulz, Georg Bendt
Summary: Partially fluorinated beta-diketonate complexes were synthesized and compared with related complexes, showing positive thermal effects on metal acetylacetonates without clear trends. These complexes used as precursors in MOCVD process can yield metal or metal oxide thin films.
Article
Chemistry, Multidisciplinary
John Abou-Rjeily, Ilham Bezza, Noureddine Ait Laziz, Daniela Neacsa, Cecile Autret-Lambert, Fouad Ghamouss
Summary: The use of natural pyrolusite for synthesizing a NaMnO blend demonstrates promising electrochemical performance with high Coulombic efficiency and capacity retention rate. The synthesis technique utilizes natural materials, avoids toxic metals, and has limited byproduct formation.
Article
Chemistry, Multidisciplinary
Maciej Jankowski, Mehdi Saedi, Francesco La Porta, Anastasios C. Manikas, Christos Tsakonas, Juan S. Cingolani, Mie Andersen, Marc de Voogd, Gertjan J. C. van Baarle, Karsten Reuter, Costas Galiotis, Gilles Renaud, Oleg Konovalov, Irene M. N. Groot
Summary: Real-time monitoring of graphene growth on liquid copper has allowed for accurate control of growth parameters and the transition from continuous polycrystalline film to defect-free single crystals. These results have broad implications for studying and tailoring 2D material formation processes on LMCats under CVD growth conditions.
Article
Chemistry, Inorganic & Nuclear
Xiao-Peng Hu, Wei Deng, Hong-Lin Lu, Jin Tong, Shu-Yan Yu
Summary: Two novel bis-(beta-diketonate) ligands were designed and synthesized for self-assembly with transition and lanthanide metals to form luminescent supramolecular coordination compounds. Spectroscopic techniques were used to characterize two neutral dinuclear supramolecular assemblies and investigate their photophysical properties. X-ray crystallography revealed the molecular arrangement of one of the complexes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Pramod Menezes, Mohamed M. Elnagar, Mohammad Al-Shakran, Maximilian J. Eckl, Prashanth W. Menezes, Ludwig A. Kibler, Timo Jacob
Summary: In this study, a robust and efficient method to modify the chemical and physical properties of polycrystalline copper wires via versatile plasma electrolysis was presented. Silica nanoparticles were introduced during the electrolysis to tailor the surface structure of the copper electrode, leading to the formation of homogeneous 3D coral-like microstructures. These microstructures, composed of CuO and Cu2O, can be tuned in terms of oxide film thickness, surface morphology, and chemical composition by controlling the plasma parameters. Additionally, the fabricated microstructures can be transformed into nanospheres assembled in coral-like microstructures through electrochemical treatment.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Environmental Sciences
Yasser M. A. Mohamed, Yasser A. Attia
Summary: Pt/TiO2 nanocomposites were prepared by photo-deposition method and used for photocatalytic removal of SOx from flue gas under visible light irradiation. The nanocomposites exhibited high catalytic activity and optical performance, making them suitable for ultrafast detection of pharmacophores.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yang Wang, Peng Gao, Benhang Li, Ze Yin, Li Feng, Yongze Liu, Ziwen Du, Liqiu Zhang
Summary: In this study, oxygen vacancies (OVs) and nano copper oxides (CuOx) synergistically modified TiO2 photocatalysts were successfully synthesized for the efficient removal of formaldehyde. The results showed that the CuOx/TiO2-x nanocomposites exhibited high photocatalytic activity, reaching a decomposition efficiency of 100% under visible light irradiation. The presence of OVs increased the separation efficiency of charge carriers and acted as active sites, while CuOx enhanced the generation of reactive oxygen species (ROS), leading to the high performance of the photocatalyst. Furthermore, stability tests demonstrated that the CuOx/TiO2-x nanocomposites maintained a stable and high photoactivity even after multiple cycles.
Article
Energy & Fuels
Chengrui Xu, Shiwei Dong, Tianhu Chen, Haibo Liu, Xuehua Zou, Minghao Ji, Zhengyan Han, Daobing Shu, Can Wang, Dong Chen
Summary: A series of CuMn mixed oxides catalysts (CMO-T) were prepared from CuMn layered double hydroxides (CuMn-LDH) and showed high catalytic activity and stability in the oxidation of toluene. The formation of a copper-manganese solid solution with abundant multiple-phase interfaces and the strong interaction between Cu and Mn contributed to the enhanced performance. The facile method of preparing mixed-metal solid solutions from LDH precursors has potential applications in catalytic oxidation.
Article
Chemistry, Organic
Chen Zhiyuan, Yang Mengwei, Xu Jianlin, Xu Yunhe
Summary: A copper-catalyzed mono-lateral protosilylation reaction was developed for the synthesis of beta-silyl substituted vinylphosphine oxides, showing high chemoselectivity and yield. The resulting products can be further derivatized with an alternative alkynyl functional group.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Lorenzo Bigiani, Davide Barreca, Alberto Gasparotto, Teresa Andreu, Johan Verbeeck, Cinzia Sada, Evgeny Modin, Oleg I. Lebedev, Juan Ramon Morante, Chiara Maccato
Summary: Through a specific material combination, selective triggering of oxygen generation and reduction of chlorine production in seawater has been achieved. The combination of MnO2 and Co3O4 performs the best in alkaline seawater splitting, showing significant results.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Biochemistry & Molecular Biology
Davide Barreca, Ettore Fois, Alberto Gasparotto, Chiara Maccato, Mario Oriani, Gloria Tabacchi
Summary: By using density functional theory and ab initio molecular dynamics simulations, the study investigates the dissociation mechanism of metal-ligand bonds on the growth surface, showing that hydrogen bonding with surface hydroxyl groups plays a key role in aiding the dissociation of metal-oxygen bonds.
Article
Engineering, Environmental
Javier Fragoso, Davide Barreca, Lorenzo Bigiani, Alberto Gasparotto, Cinzia Sada, Oleg I. Lebedev, Evgeny Modin, Ivana Pavlovic, Luis Sanchez, Chiara Maccato
Summary: This study presents the use of heterostructures based on beta-Fe2O3 for De-NOx photocatalysis, fabricated by chemical vapor deposition of Fe2O3 and functionalized with CuO or WO3. The modulation of material performance by forming heterostructures enables efficient removal of nitrogen oxides. The improved photoactivity is attributed to matched band edges and increased oxygen defectivity in the target heterostructures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Davide Barreca, Lorenzo Bigiani, Max Klotzsche, Alberto Gasparotto, Roberta Seraglia, Christian Jandl, Alexander Pothig, Ettore Fois, Laura Vanin, Gloria Tabacchi, Marco Roverso, Sara Bogialli, Emanuela Callone, Sandra Dire, Chiara Maccato
Summary: Iron(III) oxide nanomaterials show great potential in various applications, and the versatile iron(II) precursor Fe(tfa)(2)TMEDA can be used to fabricate high purity iron oxide nanomaterials with metastable phase and tunable nano-organization. This precursor combines molecular stability, volatility, and clean decomposition, making it ideal for chemical vapor deposition (CVD) applications.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Davide Barreca, Chiara Maccato, Alberto Gasparotto
Summary: This review discusses the advancements in chemoresistive gas sensors based on metal oxide nanosystems for the detection of chemical warfare agents (CWAs). The sensing mechanisms and performance enhancement reasons are reviewed and summarized. The review also highlights the main challenges and prospects for future developments.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Engineering, Environmental
Mattia Benedet, Gian Andrea Rizzi, Alberto Gasparotto, Oleg Lebedev, Leonardo Girardi, Chiara Maccato, Davide Barreca
Summary: This study presents a fabrication method for OER electrocatalysts based on graphitic carbon nitride. The catalysts were deposited on conductive glass substrates via electrophoretic technique and functionalized with noble metals using RF-sputtering. Functional tests showed that the catalysts exhibited high sensitivity to Vis light and their photoelectrocatalytic performances depended on the type of metal and the features of the carbon nitride deposit.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Physics, Condensed Matter
Mattia Benedet, Alberto Gasparotto, Gian Andrea Rizzi, Davide Barreca, Chiara Maccato
Summary: In this study, the surface composition and elemental chemical states of graphitic carbon nitride (g-C3N4) materials decorated with highly dispersed noble metals were characterized using X-ray photoelectron spectroscopy. The results showed an intimate contact between the introduced noble metals and the underlying g-C3N4 matrix, resulting in functionalized structures of highly defective carbon nitride matrices.
SURFACE SCIENCE SPECTRA
(2022)
Article
Materials Science, Multidisciplinary
Bushra Ali, Indherjith Sakthinathan, Davide Barreca, Chiara Maccato, Joydeb Goura, Ulrich Kortz, Timothy McCormac
Summary: A Mn-III-substituted Wells-Dawson-type polyoxoanion was immobilised on a glassy carbon electrode surface using the conducting polymer poly(3,4-ethylenedioxythiophene). The immobilised films were characterized by electrochemical techniques and surface analysis methods. The Mn-4(P2W15)(2) showed redox activity within the polymer phase and the conducting polymer films exhibited pH-dependant redox activity and enhanced stability.
Article
Chemistry, Multidisciplinary
Serge Benedoue, Mattia Benedet, Alberto Gasparotto, Nicolas Gauquelin, Andrey Orekhov, Johan Verbeeck, Roberta Seraglia, Gioele Pagot, Gian Andrea Rizzi, Vincenzo Balzano, Luca Gavioli, Vito Di Noto, Davide Barreca, Chiara Maccato
Summary: This study reports on the synthesis of gCN flakes on Ni foam substrates by electrophoretic deposition and their decoration with Co-based cocatalysts. The developed systems were tested as (photo)anodes for water splitting and photoelectrocatalysts for the degradation of a recalcitrant water pollutant. Results showed that gCN decoration with Co-based cocatalysts enhanced water splitting performances, but bare gCN was more efficient in degrading the pollutant due to a different reaction mechanism. The insights from this study may provide guidelines for active nanomaterials in environmental remediation and solar-to-chemical energy conversion.
Article
Physics, Condensed Matter
Mattia Benedet, Gian Andrea Rizzi, Davide Barreca, Alberto Gasparotto, Chiara Maccato
Summary: In this study, photoelectron spectroscopy data on gCN-containing composite systems supported on fluorine-doped tin oxide were obtained using nonmonochromatized Mg K alpha radiation. The investigated materials were prepared via a straightforward decantation route, followed by functionalization with nanostructured co-catalysts (CoO, CoFe2O4) and thermal treatment. The results, including survey scans and high-resolution spectra of different core-levels, provide valuable information for future studies in related fields.
SURFACE SCIENCE SPECTRA
(2023)
Article
Chemistry, Inorganic & Nuclear
Mattia Benedet, Davide Barreca, Ettore Fois, Roberta Seraglia, Gloria Tabacchi, Marco Roverso, Gioele Pagot, Cristiano Invernizzi, Alberto Gasparotto, Alexandra A. Heidecker, Alexander Poehig, Emanuela Callone, Sandra Dire, Sara Bogialli, Vito Di Noto, Chiara Maccato
Summary: The coordination sphere engineering of three heteroleptic Ni(ii) beta-diketonate-diamine adducts was studied, and it was found that the chemico-physical characteristics of the compounds directly depend on the functional groups in the diketonate ligands. Preliminary thermal CVD experiments demonstrated the suitability of the precursors for the obtainment of NiO films with flat and homogeneous surfaces.
DALTON TRANSACTIONS
(2023)
