Article
Green & Sustainable Science & Technology
Miguel Diaz-Sanchez, Roxana Nicoleta Murgu, Diana Diaz-Garcia, Jose M. Mendez-Arriaga, Sanjiv Prashar, Bela Urban, Jiri Pinkas, Martin Lamac, Michal Horacek, Santiago Gomez-Ruiz
Summary: This study synthesized titanium dioxide nanomaterials with improved catalytic and photocatalytic properties through co-doping with copper and fluorine. These nanomaterials showed effective degradation of industrial and emerging contaminants, as well as activity in coupling reactions and energy-related photocatalytic processes, making them potentially suitable for cleaner energy generation.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Terrence S. Malatjie, Tarryn L. Botha, Alex T. Kuvarega, Ntakadzeni Madima, Karin de Bruyn, Memory Tekere, Thabo T. Nkambule, Bhekie B. Mamba, Titus A. M. Msagati
Summary: A wide range of semiconductor-assisted photocatalytic nanomaterials are being investigated as potential photocatalysts in water treatment. The use of nanocomposites composed of nano-TiO2 and MWCNTs is increasing due to their enhanced photocatalytic efficiency. However, the potential risks of these nanosystems in aquatic systems are not well understood. In this study, the toxic effects of TiO2/MWCNT-CNF nanocomposite on freshwater microalgae were assessed. The nanocomposite showed enhanced dye removal performance but also caused algal growth inhibition and sublethal oxidative stress effects. These findings contribute to a better understanding of the potential hazards of nanocomposites in wastewater treatment.
Article
Engineering, Environmental
Xueying Cheng, Renquan Guan, Yunning Chen, Yudan Qian, Qingkun Shang, Yingnan Sun
Summary: In this study, the adsorption and photocatalytic degradation of oxytetracycline (OTC) were investigated using different metal-doped TiO2 nanocatalysts (M-TiO2, M = Fe, Co, Ni, Cr). The effects of different metal dopants on the adsorption and degradation abilities of TiO2 were studied. The photocatalytic performance of Fe-TiO2 was found to be excellent due to the synergy between the separation ability of photogenerated carriers and the adsorption ability of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Xiaojing Han, Hongrui Ma, Chuanyi Wang, Yingxuan Li
Summary: This study successfully improved the photocatalytic performance of TiO2 by loading histidine, which enhanced hydrogen production efficiency and maintained catalytic activity over 30 hours of operation.
JOURNAL OF PHYSICS-ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Shweta Manchwari, Jaya Khatter, R. P. Chauhan
Summary: This study focuses on the synthesis of TiO2/CdS nanocomposites with different concentrations of precursors and their characterization using various techniques. The results show that TiO2/CdS nanocomposites exhibit excellent photocatalytic performance in the visible range compared to pure TiO2, and they have better degradation efficiency for methylene blue dye compared to rhodamine B dye. The optimum photocatalytic performance is achieved with a 1:1 M ratio of cadmium and sulphur precursors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Engineering, Environmental
Xueqi Li, Hongyan Wei, Tiehong Song, Hai Lu, Xiaoyan Wang
Summary: This article reviews the preparation methods, performance evaluation, and applications of modified TiO2 photocatalysts. It discusses the effects and mechanisms of modified TiO2 photocatalysts on degrading organic pollutants in water bodies, as well as the influencing factors. The article summarizes the achievements, advantages, existing problems, challenges, and future prospects in this field.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Sohel Das, Vineeta Singh, Subhankar Paul
Summary: A conjugate of nano-graphene oxide (GO) and titanium dioxide nanoparticle (nTiO(2)) was proposed for the photocatalytic degradation of toxic azo dyes. The optimized weight ratio of 1:5 between GO and nTiO(2) showed the highest degradation efficiency. The nanoconjugate exhibited high degradation efficiency for Congo red (CR) and Methylene blue (MB), and the photocatalyst could be reused for multiple cycles.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Composites
Qinggang Fan, Tao Wang, Wei Fan, Lin Xu
Summary: Tubular Au/TiO2/SiO2 ternary nanocomposite with high-temperature ablation and noble metal deposition was successfully fabricated. SiO2 deposition inhibits the growth of TiO2 grain size, and the tubular structure effectively improves the utilization of visible-light. Au nanoparticles absorb visible-light, promote the formation of photogeneration-hole pairs, and act as an electron acceptor to delay the recombination rate of photogeneration electron-hole pairs, thereby improving the photocatalytic activity. Moreover, the composite gel of polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) used for loading and immobilizing TiO2-based catalytic materials exhibits good photocatalytic activity and recyclability.
COMPOSITES COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Salvatore Chirumbolo, Davide Gibellini, Luca Berto, Cinzia Cirrito, Antonio Vella, Geir Bjorklund, Andrea Sbarbati, Paolo Bernardi, Umberto Tirelli
Summary: TiO2-Ag doped nanoparticulate (TiO2-Ag-NP) adhesive photocatalytic films were used to assess the ability to reduce indoor microbial particles. The films were applied in various living spaces and showed a reduction of microbial pollution by more than 70%. The correlation between the reduction of relative light unit (RLU) and colony forming units per cubic meter (CFU/m(3)) confirmed the efficacy of the TiO2-Ag-NP adhesive film in reducing microbial pollution.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Nahid Sandikly, Mounir Kassir, Mouhieddine El Jamal, Hosni Takache, Philippe Arnoux, Samia Mokh, Mohammad Al-Iskandarani, Thibault Roques-Carmes
Summary: This paper investigates the residual toxicity of waters after photocatalysis treatments, finding that water treated with PANI/TiO2 at pH 12 is the least toxic to algae cells, while water processed by bare titania at acidic pH displays significant toxicity towards algae cells larger than that of the original SQX solution.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sarka Drdova, Marianna Giannakou, Fuze Jiang, Luchan Lin, Deeptanshu Sivaraman, Rita Toth, Thomas Graule, Artur Braun, Jan Ilavsky, Ivan Kuzmenko, Jing Wang
Summary: Atomization and spraying methods are compared for the immobilization of TiO2 dispersions onto fibrous filter media. The spray gun and spray atomization methods showed the best photocatalytic performance, while the spray-drying method had the lowest efficiency.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Umberto Belle, Daniela Spini, Barbara Del Curto, MariaPia Pedeferri, Maria Vittoria Diamanti
Summary: The environmental impact of industrial technologies and related remediation methods is a significant research area. In the development of materials for wastewater treatment or air purification, the use of hazardous reactants often diminishes the overall positive contribution to the environment. This study presents the synthesis of stable titanium dioxide (TiO2) sols using an environmentally friendly method. The sol was deposited on glass and evaluated for wastewater purification ability by photocatalytic degradation of organic dyes. The results showed high efficiency and reusability, with degradation rates exceeding 85% for Rhodamine B and 100% for Methylene Blue.
Article
Biochemistry & Molecular Biology
Mairis Iesalnieks, Raivis Eglitis, Talis Juhna, Krisjanis Smits, Andris Sutka
Summary: This study successfully prepared a transparent titanium dioxide coating on plastic substrates and demonstrated its high performance in photocatalytic degradation of organic pollutants. The coating can be applied to polymer substrates and exhibits good stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Energy & Fuels
Elena Alfonso-Gonzalez, Marta Liras, Mengjiao Wang, Ignacio J. Villar-Garcia, Luca de Trizio, Mariam Barawi, Victor A. de la Pena O'Shea
Summary: In this work, a tandem photoelectrochemical (PEC) cell based on two different crystallographic phases of sub-stoichiometric copper telluride nanocrystals (NCs) was designed, assembled, and characterized. The PEC cell exhibits efficient photoconversion by utilizing the distinct optoelectronic properties of the two Cu2-xTe structures.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Nanoscience & Nanotechnology
Hongxia Wang, Yan Wang, Yumei Lin, Xiaochun Huang, Miguel Garcia-Tecedor, Victor A. de la Pena O'Shea, Connor Murrill, Vlado K. Lazarov, Freddy E. Oropeza, Kelvin H. L. Zhang
Summary: In this study, a NiCo2O4/SrTiO3 heterojunction photoelectrode was used as a model to investigate the modulation of band structure upon contact with the electrolyte. It was found that the band alignment can be controlled by adjusting the thickness of the heterojunction film and the water redox potential. The results also showed that a 1 nm NiCo2O4/SrTiO3 heterojunction exhibited superior water-splitting performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Laura Collado, Miguel Gomez-Mendoza, Miguel Garcia-Tecedor, Freddy E. Oropeza, Anna Reynal, James R. Durrant, David P. Serrano, Victor A. de la Pena O'Shea
Summary: Russelite bismuth tungstate (Bi2WO6) is a material with excellent optoelectronic properties, which can be used for photocatalytic degradation and mineralization of pollutants and organic compounds. This study proposes the development of Bi2WO6/TiO2 heterojunctions for CO2 photoreduction, showing potential for producing fuels, alleviating global warming, and addressing fossil fuel shortage.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Biochemistry & Molecular Biology
Nayara Niza-Perez, Josefa Quiroz-Troncoso, Nicolas Alegria-Aravena, Santiago Gomez-Ruiz, Diana Diaz-Garcia, Carmen Ramirez-Castillejo
Summary: This article focuses on the synthesis and functionalization of calcium carbonate-based materials for the treatment of glioblastoma. The incorporation of l-cysteine and manganese into the systems increased cell selectivity and cytotoxicity. Extensive characterization confirmed the effect of different fragments on the selectivity and cytotoxicity of the systems. The cytotoxicity studies on glioblastoma cells showed promising results for future in vivo studies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Multidisciplinary Sciences
Isabel del Castillo-Velilla, Ahmad Sousaraei, Ignacio Romero-Muniz, Celia Castillo-Blas, S. J. Alba Mendez, Freddy E. Oropeza, Victor A. de la Pena O'Shea, Juan Cabanillas-Gonzalez, Andreas Mavrandonakis, Ana E. Platero-Prats
Summary: Luminescent metal-organic frameworks are a new type of optical sensor capable of capturing and detecting toxic gases. In this study, synergistic binding sites were incorporated into MOF-808 through post-synthetic modification with copper for optical sensing of NO2 at remarkably low concentrations. Computational modelling and advanced synchrotron characterization tools were used to understand the atomic structure of the copper sites.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Windy Ayu Lestari, Ozi Adi Saputra, Diana Diaz-Garcia, Sayekti Wahyuningsih, Santiago Gomez-Ruiz, Fajar Rakhman Wibowo
Summary: This study investigates the influence of temperature and the amount of triethylamine (TEA) and/or cetyltrimethylammonium bromide (CTAB) on the morphology and properties of small mesoporous silica nanoparticles (SMSN). The results indicate that temperature is the most influential factor in the synthesis of SMSN.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Imane Benabdelaziz, Kherkhache Hayat, Santiago Gomez-Ruiz, Sandra Carralero, Hamada Haba
Summary: The chemical characterization of Euphorbia retusa aerial parts was conducted using chromatographic methods, revealing the presence of two new tirucallane-type triterpenoids (1a and 1b) and nine known compounds. The structures of these compounds were determined through spectroscopic analyses and comparison with related compounds. The study also discussed the chemotaxonomic aspects of the plant.
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
(2023)
Article
Chemistry, Multidisciplinary
I. Jennifer Gomez, Karina Ovejero-Paredes, Jose Manuel Mendez-Arriaga, Nadezda Pizurova, Marco Filice, Lenka Zajickova, Sanjiv Prashar, Santiago Gomez-Ruiz
Summary: Due to their water solubility, stability, non-toxicity, and photoluminescence, nitrogen-doped graphene quantum dots (NGQDs) have potential for delivering organotin(IV) compounds in cancer therapy. Two nanosystems were developed by grafting organotin fragments and 4-formylbenzoic acid onto the surface of NGQDs. In vitro tests demonstrated high cytotoxicity against breast cancer cells (MDA-MB-231) and minimal effects on non-cancer cells (HEK293T), with successful uptake and release of the metallodrug in cancer cells.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Pharmacology & Pharmacy
Alvar Serrano-Pindado, Michael Aondona Iorhemba, Diana Diaz-Garcia, Miguel Diaz-Sanchez, Irene Mena-Palomo, Santiago Gomez-Ruiz, Sanjiv Prashar
Summary: This study aimed to prepare and structurally characterize titanocene functionalized mesoporous silica nanoparticles and evaluate their cytotoxic activity against cancer cells. The titanocene-functionalized mesoporous silica nanoparticles showed promising antitumoral activity against breast cancer cells.
CURRENT PHARMACEUTICAL DESIGN
(2023)
Article
Chemistry, Physical
Roser Fernandez-Climent, Jesus Redondo, Miguel Garcia-Tecedor, Maria Chiara Spadaro, Junnan Li, Daniel Chartrand, Frederik Schiller, Jhon Pazos, Mikel F. Hurtado, Victor de la Pena O'shea, Nikolay Kornienko, Jordi Arbiol, Sara Barja, Camilo A. Mesa, Sixto Gimenez
Summary: In this study, a facile, cost-effective, and scalable synthetic route to produce Cu2-x S electrocatalysts is reported. The Cu2-x S electrodes exhibit continuously increasing hydrogen evolution rates for over a month of operation. Under mild conditions (pH 8.6), these electrodes achieve a state-of-the-art performance with a current density of about 400 mA cm(-2) at -1 V vs RHE and nearly 100% Faradaic efficiency for hydrogen evolution. The improved performance of the Cu2-x S electrodes is correlated with a decrease in the Tafel slope, and analysis techniques reveal the Cu-centered nature of the catalytically active species.
Article
Chemistry, Physical
Javier Corpas, Miguel Gomez-Mendoza, Enrique M. Arpa, Victor A. de la Pena O'Shea, Bo Durbeej, Juan C. Carretero, Pablo Mauleon, Ramon Gomez Arrayas
Summary: This article demonstrates the synthesis of stereodivergent tetrasubstituted beta-boryl acrylates through iterative dual-metal and energy transfer catalysis. The reluctance of electron-deficient internal alkynes to undergo catalytic carboboration has been overcome through cooperative Cu/Pd-catalysis, while an Ir complex acts as a versatile sensitizer for photoisomerization of the resulting sterically crowded alkenes.
Article
Green & Sustainable Science & Technology
Carmen G. Lopez-Calixto, Miguel Gomez-Mendoza, Mariam Barawi, Laura Collado, Marta Liras, Victor A. de la Pena O'shea
Summary: This study describes the design and synthesis of CPPs based on thienoacene units and their electronic alignment and photo(thermal) stability with TiO2. The simultaneous UV-vis irradiation of these materials leads to higher H2 production compared to solely irradiating the CPPs with visible light, due to charge-transfer mechanisms. Additionally, in gas phase CO2 photoreduction tests, the IEP-15@T-10 hybrid shows a significant increase in CH4 evolution and selectivity compared to TiO2.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Xiaofeng Wu, Freddy E. Oropeza, Zheng Qi, Marcus Einert, Chuanmu Tian, Clement Maheu, Kangle Lv, Jan P. Hofmann
Summary: This article investigates the effects of molybdenum (Mo) doping on the interfacial charge transfer kinetics of BiVO4, finding that Mo doping not only increases the photovoltage, but also significantly reduces the interfacial charge transfer resistance, resulting in a significant enhancement of the photocurrent density of BiVO4.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Nanoscience & Nanotechnology
Mariam Barawi, Miguel Garcia-Tecedor, Miguel Gomez-Mendoza, Giulio Gorni, Marta Liras, Victor A. de la Pena O'shea, Laura Collado
Summary: Photocatalytic nitrogen fixation to ammonia and nitrates is a promising sustainable route. This study modified the TiO2 framework via aliovalent molybdenum doping to enhance the photocatalytic performance. Aqueous-dispersed colloidal semiconductor nanocrystals (NCs) with precise morphological control and better carrier mobility were used. The Mo-TiO2 NCs functionalized with charged hydroxyl groups showed simultaneous production of ammonia, nitrites, and nitrates in water. Mo-doping and nanostructuration significantly improved the overall N-2 fixation performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Maria Gonzalez-Ingelmo, Miriam Lopez Garcia, Freddy E. Oropeza, Patricia Alvarez, Clara Blanco, Ricardo Santamaria, Victoria G. Rocha
Summary: Reduced graphene oxide 3D aerogels doped with low concentrations of nickel were prepared for efficient and sustainable hydrogen production via water electrolysis. The study shows that the incorporation of transition metals into carbon supports can greatly improve the catalytic properties for water splitting in alkaline media. The hybrid material exhibited an impressive ten-fold performance increase, highlighting the remarkable influence of Fe in promoting the in situ formation of highly active Ni-Fe oxyhydroxide.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)