Article
Chemistry, Multidisciplinary
Milad Mehdipour, Lucy Gloag, Jiaxin Lian, Richard D. Tilley, J. Justin Gooding
Summary: A new type of gold-coated magnetic nanoparticle with strongly magnetic zero-valent iron core and iron oxide shell was synthesized. The nanoparticles showed stability against magnetic aggregation and good colloidal stability, which is important for many biomedical applications.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Zeeshan Ali, Jens-Petter Andreassen, Sulalit Bandyopadhyay
Summary: Silica coated iron oxide nanoparticles (SIONPs) have attracted significant attention in biomedicine for their unique properties. The synthesis of SIONPs with tuned size and morphology has been extensively studied, but the effect of solvent, catalyst, and surface chemistry of the iron oxide nanoparticles (IONPs) has not been fully investigated. In this study, we thoroughly investigate the influence of these parameters on the size and morphology of SIONPs. This knowledge is crucial for controlling the magnetic properties and applications of SIONPs.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Cristina Chircov, Maria-Andreea Minca, Andreea Bianca Serban, Alexandra Catalina Birca, Georgiana Dolete, Vladimir-Lucian Ene, Ecaterina Andronescu, Alina-Maria Holban
Summary: This study aimed to develop zinc and/or cerium-substituted magnetite nanoparticles for medical applications. The nanostructures were evaluated using various analysis methods and subjected to antioxidant, anticancer, and antimicrobial tests. The results showed promising effects, including the inhibition of oxidative stress in normal cells, inhibition of cell proliferation in tumor cells, and antimicrobial activity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Environmental Sciences
Anastasiya Kiryushina, Lyubov Bondarenko, Artur Dzeranov, Kamila Kydralieva, Svetlana Patsaeva, Vera Terekhova
Summary: The increase in production and application of engineered nanomaterials and antibiotics leads to their discharge into the environment, raising concerns about their joint effect on organisms. In this study, silica-magnetite nanoparticles modified with tetraethoxysilane and 3-aminopropyltriethoxysilane (MTA-NPs) and the antibiotic ciprofloxacin (CIP) were examined for their joint toxicity to Paramecium caudatum. The presence of MTA-NPs and humic acids (HA) at studied concentrations resulted in 40% mortality of organisms. However, when MTA-NPs and HA were combined at specific concentrations, the mortality rate of the organisms decreased by over 30% due to enhanced removal of CIP, indicating the detoxifying role of dissolved organic matter in complex water pollution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Goezde Kosarsoy Agceli, Hande Gunan Yucel
Summary: In this study, levan biopolymer was produced by immobilized Paenibacillus polymyxa HCT33-3 on Fe3O4@SiO2 nanocomposite. The highest levan concentration of 35.8 g/L was obtained at the 54th hour in the medium including 20% molasses (v/v) with the initial pH and temperature values of 7.0 and 37 °C, respectively. The produced exopolysaccharide showed antimicrobial effect and effectiveness on Pseudomonas aeruginosa biofilm.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Gulzhian Dzhardimalieva, Lyubov Bondarenko, Erzsebet Illes, Etelka Tombacz, Nataliya Tropskaya, Igor Magomedov, Alexander Orekhov, Kamila Kydralieva
Summary: The production of stable and homogeneous batches during nanoparticle fabrication is challenging, with an important consideration being the dispersion stage of pre-formed samples. Stirred samples showed a higher loading capacity towards polyanions compared to sonicated ones.
Article
Chemistry, Applied
Edwin Prathibha, Rajmohan Rangasamy, Arunasalam Sridhar, Kannappan Lakshmi
Summary: An eco-friendly approach was reported for the synthesis of silica-coated magnetite material decorated with ultra-fine silver nanoparticles, as a magnetically recyclable catalyst for the detoxification of 4-nitrophenol. This synthetic strategy employed only ultrasound waves throughout the preparation of the catalyst material without adding any stabilizer. The catalyst was well characterized and showed great potential for the treatment of wastewater contaminated with 4-nitrophenol.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Infectious Diseases
Cristina Chircov, Maria-Florentina Matei, Ionela Andreea Neacsu, Bogdan Stefan Vasile, Ovidiu-Cristian Oprea, Alexa-Maria Croitoru, Roxana-Doina Trusca, Ecaterina Andronescu, Ionut Sorescu, Florica Barbuceanu
Summary: This study focuses on the development of nanostructured systems based on Fe3O4@SiO2 core-shell nanoparticles and three different types of essential oils to overcome the limitations of essential oils in biomedical applications. By comparing the synthesis methods of Fe3O4@SiO2 core-shell nanoparticles, the impact of the method on nanoparticle formation and properties was studied. The antimicrobial properties of the synthesized nanocomposites were also evaluated for potential applications in antimicrobial therapies.
Article
Polymer Science
Olga P. Fuentes, Johann F. Osma
Summary: The study aims to evaluate the effectiveness of functionalized bionanocompounds with ice nucleation protein (INP) as a novel approach for freezing applications. By comparing water bionanocompound solutions with pure water, the energy consumption at each step of freezing was assessed. The results demonstrated that water used the least energy during the manufacturing process and bionanocompounds could substantially reduce environmental impact during the operation stage. The findings also indicated that bionanocompounds had the potential to save significant amounts of energy compared to water in freezing applications.
Article
Chemistry, Applied
Oleksandr Nechyporchuk, Hanna Ulmefors, Anita Teleman
Summary: The study found that adding zinc oxide (ZnO) in strong alkali can delay the dissolution of silica nanoparticles (SNPs), allowing cellulose solutions containing silica to maintain viscous behavior during wet spinning. With ZnO added, silica-rich regenerated cellulose fibers with uniform cross sections and smooth surface structure can be successfully spun.
CARBOHYDRATE POLYMERS
(2021)
Article
Polymer Science
Simona Caprarescu, Cristina Modrogan, Violeta Purcar, Annette Madelene Dancila, Oanamari Daniela Orbulet
Summary: The paper aimed to synthesize polyvinyl alcohol-SiO2 nanoparticles polymeric membrane by wet-phase inversion method and investigate its efficiency for zinc ion removal. Membranes with SiO2 showed higher zinc ion removal rate at 15 V. Characterization through various methods indicated their potential for removing pollutants in different waters.
Article
Materials Science, Multidisciplinary
J. Martinez Rubio, M. A. Palomar-Padilla, M. E. Cano, J. Escalante, N. Casillas, I Ceja, A. Gutierrez-Becerra, M. Barcena-Soto
Summary: The surfactants Fe(AOT)(2) and Ni(AOT)(2) were used as precursors in the synthesis of Fe3O4 and NiFe2O4 nanoparticles, with successful ionic substitution confirmed by FTIR and MS results. The controlled size of magnetic nanoparticles was achieved by mixing aqueous surfactant solutions with Fe3+(or Fe2+) in a basic environment, with AOT(-) molecules limiting nanoparticle growth. The use of M(AOT)(2) surfactants as precursors opens up possibilities for synthesizing magnetic nanoparticles with well-defined properties.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Ivana Gabelica, Lidija Curkovic, Vilko Mandic, Ivana Panzic, Davor Ljubas, Kreso Zadro
Summary: In this study, magnetic nanoparticles based on magnetite were successfully synthesized using microwave-assisted techniques. The ternary core-shell Fe3O4/SiO2/TiO2 nanocomposite exhibited synergistic adsorption and photocatalytic properties for the removal of organic micropollutants, with the ability to be easily recovered and reused through magnetic separation.
Article
Chemistry, Inorganic & Nuclear
Mirjana M. Radanovic, Ljiljana S. Vojinovic-Jesic, Miodrag G. Jelic, Elias Sakellis, Berta Barta Hollo, Vukadin M. Leovac, Marko Rodic
Summary: The presence or absence of LiOAc affects the coordination mode of the Schiff base, leading to differences in the structure and properties of the complexes. Both complexes and the ligand itself exhibit high photoluminescence properties.
Article
Chemistry, Physical
Jessica Andrea Flood-Garibay, Miguel A. Mendez-Rojas
Summary: The study reported the preparation of magnetic wrinkled mesoporous silica (MWMS) nanocomposites using different methods, and characterized their morphology and physical properties using various analytical techniques. The resulting MWMS nanocomposites show potential for biomedical applications as drug delivery systems or contrast agents for magnetic resonance imaging.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Nanoscience & Nanotechnology
Pooja Rana, Ranjana Dixit, Shivani Sharma, Sriparna Dutta, Sneha Yadav, Bhavya Arora, Bhawna Kaushik, Pooja Rana, Rakesh K. Sharma
Summary: Atomically thin two-dimensional boron nitride nanosheets have been used as exceptional support matrixes in nanocatalysis research. In this study, a magnetic boron nitride nanosheet-based cobalt catalytic system was fabricated, showing remarkable catalytic activity in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones. The hybrid material exhibited excellent characteristics such as ambient reaction conditions, high product yield, thermal and mechanical stability, as well as facile magnetic retrievability and efficient recyclability. This methodology has a wide range of applications and potential for designing next-generation 2D catalytic materials.
ACS APPLIED NANO MATERIALS
(2022)
Review
Engineering, Environmental
Gunjan Arora, Tanishka Sharma, Kirti Kashyap Taijas, Parul Pant, Chetna Gupta, R. K. Sharma
Summary: Rivers are heavily impacted by human activities, leading to deterioration in water quality, but the COVID-19 lockdown has brought temporary improvements to certain Indian rivers. Strict restrictions on human activities during the lockdown period resulted in reduced pollution and improved water parameters in some sites. However, once the lockdown is lifted, the pollution levels are likely to return to their previous state. The government's existing water pollution control schemes are analyzed and recommendations for improvement are provided in this review article.
ENVIRONMENTAL ENGINEERING RESEARCH
(2023)
Article
Chemistry, Applied
Bhawna Kaushik, Pooja Rana, Deepti Rawat, Kanika Solanki, Shallu Sachdeva, Dhanaji R. Naikwadi, Ankush Biradar, Rakesh K. Sharma
Summary: An efficient magnetic ZnO/BiVO4 heterostructure was designed and employed for environmental photocatalysis. The fabricated nanocomposite exhibited effective light absorption, prolonged charge separation, and high photocatalytic efficacy under visible light irradiation. The constructed heterostructure displayed significantly higher activity compared to bare BiVO4 and undoped magnetic ZnO nanoparticles. Mechanistic pathway during the photodegradation process was elucidated through radical trapping studies, ESR analysis, and GC-MS analysis. The recyclability of the catalyst makes it a promising candidate for large-scale applications.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Priya Yadav, Radhika Gupta, Gunjan Arora, Anju Srivastava, Rakesh K. Sharma
Summary: This study presents the fabrication and characterization of a highly efficient and magnetically retrievable nickel-based silica-coated nanocatalyst for the synthesis of biologically significant propargylamines. The nanocatalyst offers greener reaction conditions, broad substrate scope, short reaction time, and reusability for up to seven runs without significant loss in catalytic activity.
Article
Chemistry, Multidisciplinary
Bhavya Arora, Shivani Sharma, Sriparna Dutta, Aditi Sharma, Sneha Yadav, Pooja Rana, Shilpa Mehta, R. K. Sharma
Summary: Magnetic halloysite nanotubes have generated excitement in water research and technology due to their unique structure and surface chemistry. A nickel-based nanocatalyst was designed by anchoring a bidentate chelating ligand onto the surface of aminosilane functionalized magnetic halloysite nanotubes. The synthesized nanocatalyst showed outstanding efficiency in degrading pollutants under neutral conditions and could be easily retrieved using a magnet.
Article
Chemistry, Multidisciplinary
Pooja Rana, Ranjana Dixit, Shivani Sharma, Sriparna Dutta, Sneha Yadav, Bhavya Arora, Priyanka, Bhawna Kaushik, Manoj B. Gawande, Rakesh K. Sharma
Summary: This report presents a method for fabricating a magnetic nanocatalyst based on two-dimensional nanomaterials, which shows promising applications in pharmaceutical synthesis. The catalyst exhibits mild reaction conditions, wide substrate scope, excellent product yield, and short reaction time. Furthermore, the catalyst can be easily retrieved and reused for multiple rounds without significant loss in catalytic efficiency.
REACTION CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Kanika Solanki, Shivani Sharma, Sneha Yadav, Bhawna Kaushik, Pooja Rana, Ranjana Dixit, R. K. Sharma
Summary: Hierarchical micro/nanostructures, as an interesting class of crystalline materials, have been widely applied in diverse fields, including waste-water treatment. Due to their unique properties such as large surface-to-volume ratio, facile mass transportation, and high stability against aggregation, three-dimensional (3D) hierarchical metal oxides are considered versatile functional materials. This review focuses on the synthesis methods and surface modification strategies of hierarchical structures, aiming to enhance the removal efficiency of different noxious substances. The applications and mechanistic pathways of these materials for the eradication of organic and inorganic contaminants are comprehensively discussed.
Article
Chemistry, Multidisciplinary
Kanika Solanki, Shivani Sharma, Pooja Rana, Bhawna Kaushik, Sneha Yadav, Ranjana Dixit, Ankush V. Birdar, Ashu Gupta, R. K. Sharma
Summary: In order to remove Pb2+ ions from wastewater rapidly and selectively, we developed an economically viable three-dimensional ferrite-based hierarchical structure with high surface area, good thermal stability, and flower-shaped morphology. The synthesized material exhibited excellent adsorption performance for Pb2+ ions. Experimental exploration also demonstrated the selectivity and efficiency of the material in real water samples. The rating: 8 points.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Pooja Rana, Kapil Mohan Saini, Bhawna Kaushik, Kanika Solanki, Ranjana Dixit, Rakesh K. Sharma
Summary: In this work, a versatile and noble metal free copper-based heterogeneous photocatalyst was successfully fabricated, which represents a green shift away from precious group metals commonly used as photocatalysts. The synthesized copper photocatalyst showed high activity and was utilized for a cross dehydrogenative coupling reaction between tertiary amines and carbon nucleophiles. The copper-based photocatalyst exhibited exceptional chemical stability, reusability, and high loading of copper, making it a potential candidate for environmentally friendly and economically feasible applications.
Article
Chemistry, Inorganic & Nuclear
Aditi Sharma, Shivani Sharma, Sriparna Dutta, Sneha Yadav, Ranjana Dixit, Bhavya Arora, Shilpa Mehta, Anju Srivastava, Rakesh K. K. Sharma
Summary: In this study, a magnetically retrievable graphene oxide (MGO) based copper nanocatalytic system immobilized with dehydroacetic acid (DHA) was designed and synthesized. The synthesized nanocomposite (Cu@DHA@APTES@MGO) showed high efficiency in the cyclization of 2-aminophenols and β-diketones, with wide substrate scope, excellent functional group tolerance, and high conversion percentage. The 2D architecture of graphene oxide played a crucial role in the exceptional catalytic activity, providing space for trapping reactants and facilitating the reaction to afford benzoxazole products.
DALTON TRANSACTIONS
(2023)
Review
Chemistry, Multidisciplinary
Shivangi Sharma, Yukti Monga, Ashu Gupta, Shivendra Singh
Summary: Natural goods, medications, and pharmaceutically active substances all contain substituted oxindoles, which are highly influenced by the C-3 stereocenter and absolute arrangement of their substituents. The demand for contemporary probe and drug-discovery programs drives research in the synthesis of chiral compounds using diverse scaffolds. The review provides an overview of the synthesis of useful oxindole scaffolds and discusses the construction of synthetic and natural products based on oxindoles, as well as the chemical reactivity of 2-oxindole and its derivatives.
Review
Materials Science, Multidisciplinary
Rakesh Kumar Sharma, Rakeshwar Bandichhor, Vishwesh Mishra, Shivani Sharma, Sneha Yadav, Shilpa Mehta, Bhavya Arora, Pooja Rana, Sriparna Dutta, Kanika Solanki
Summary: The development of nanocatalysis has revolutionized chemistry by promoting the design of new catalytic production processes in organic synthesis with utmost waste minimization. Functional nano-architectures based on metal oxides have shown exceptional potential to enhance industrially significant oxidation processes. This review aims to summarize the applicability of diverse metal oxide nanocatalysts in manufacturing fine chemicals and provide guidance for future research in this area.
MATERIALS ADVANCES
(2023)
Review
Chemistry, Multidisciplinary
Pooja Rana, Bhawna Kaushik, Kanika Solanki, Kapil Mohan Saini, R. K. Sharma
Summary: This article provides a concise overview of the rational design and detailed characterization techniques of heterogeneous photocatalysts, with examples of their applications. The major challenges and opportunities in the future progress of these appealing areas are emphasized.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Bhavya Arora, Shivani Sharma, Sriparna Dutta, Sneha Yadav, Pooja Rana, R. K. Sharma
Summary: Worsening water quality has led to serious impacts on human health and the environmental ecosystem. Magnetic halloysite-based organic-inorganic hybrid materials have emerged as an excellent platform for efficient removal of water contaminants. The designed nanocomposites showed impressive catalytic potential, shorter reaction time, and ambient reaction conditions. The findings deepened our understanding of heterogeneous catalysts for wastewater treatment.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Sneha Yadav, Ranjana Dixit, Shivani Sharma, Sriparna Dutta, Bhavya Arora, Pooja Rana, Bhawna Kaushik, Kanika Solanki, Rakesh K. Sharma
Summary: The incessant advancements in catalytic processes have led to the design of sustainable materials, such as metal organic frameworks (MOFs), which have emerged as highly prolific heterogeneous catalysts in synthetic organic chemistry. In this study, a magnetic CoFe2O4/Cu-ABDC hybrid composite was fabricated and investigated as a catalyst in a three-component coupling reaction. The aim was to obtain biologically active and pharmacologically significant 2H-indazole scaffolds. The developed hybrid composite exhibited environmentally compatible and recyclable properties, and the study successfully replaced toxic solvents with eco-friendly solvents like water. The methodology showed promising features in terms of substrate scope, atom economy, reaction conditions, reaction time, recyclability and magnetic retrievability, making it highly valuable in industry and academia. Additionally, this study is the first to employ a magnetic MOF as a heterogeneous catalyst for the preparation of 2H-indazole moieties.
NEW JOURNAL OF CHEMISTRY
(2022)
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)
