Article
Chemistry, Multidisciplinary
Meixiu Wei, Haoran Ma, Qilin Lu, Da Ruan, Zhengdong Ma, Xiao Chen
Summary: A microreactor was fabricated for the direct synthesis of 2-cyanopyrazine. The continuous-flow process achieved high space-time yield under strong exothermic conditions, and the optimal ammoxidation process was obtained by optimizing process parameters.
Article
Chemistry, Physical
P. Rajitha, P. Mahesh Kumar, D. Mallesh, N. Lingaiah
Summary: The study investigated the use of Al2O3-ZrO2 supported V2O5 catalysts for the ammoxidation of o-Chlorotoluene to o-chlorobenzonitrile. Results showed that the catalyst exhibited high selectivity and activity, with strong interaction between vanadium species and the mixed oxide support. The catalyst with 10 wt% of V2O5 on Al2O3-ZrO2 demonstrated consistent high activity and 100% selectivity to o-CBN.
MOLECULAR CATALYSIS
(2021)
Article
Multidisciplinary Sciences
Inhak Song, Hwangho Lee, Se Won Jeon, Ismail A. M. Ibrahim, Joonwoo Kim, Youngchul Byun, Dong Jun Koh, Jeong Woo Han, Do Heui Kim
Summary: This study demonstrates that physically mixed H-Y zeolite can protect vanadium active sites effectively by trapping ABS in micropores, enabling the catalyst to operate stably at low temperatures and maintaining sulfur resistance during repeated aging/regeneration cycles. The pore structure and framework Al content of different zeolites play a crucial role in determining the trapping ability.
NATURE COMMUNICATIONS
(2021)
Review
Chemistry, Organic
Zhijie Qi, Chaoning Hu, Youwei Zhong, Chun Cai, Guo-Ping Lu
Summary: Nitriles are important synthetic intermediates, and developing new methods for their green synthesis is significant. Among these, the ammoxidation of alcohols over heterogeneous catalysts is a sustainable process due to its economic efficiency and the use of affordable raw materials and recyclable catalysts. This review summarizes the latest progress in developing heterogeneous catalysts for transforming alcohols into nitriles and discusses their preparation, functionalization strategies, and roles in these reactions.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Acoustics
Ndifreke Usen, Si Amar Dahoumane, Mamadi Diop, Xavier Banquy, Daria C. Boffito
Summary: Au nano- and microparticles were successfully synthesized using alpha-D-glucose as the reducer and stabilizer under 20 kHz ultrasound irradiation. The pH of the reaction mixture played a critical role in determining the size of the particles, with low pH producing nanoparticles and high pH yielding microparticles. The study also revealed that continuous sonication reduced larger amounts of the Au precursor compared to intermittent mode, highlighting the importance of experimental and ultrasound parameters in controlling the features of the Au particles.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Applied
William A. Goddard
Summary: This paper discusses the significant impact Bob Grasselli had on the author's research in heterogeneous catalysis.
Article
Engineering, Environmental
Yeonjoon Kim, Mohammed A. Jabed, David M. Price, Dmitri Kilin, Seonah Kim
Summary: This study provides rational design guidelines for supported V2O5 catalysts in the catalytic upgrading of lignocellulosic biomass, particularly in the conversion of guaiacol to phenol. The tilt angle of the aryl group in the hydrogen migration transition state is identified as a key descriptor in determining the catalytic activity of phenol formation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Xiongjian Li, Ning Guo, Shuijin Yang, Chi Huang
Summary: The V-Ti-O nanocomposite was synthesized through one-step hydrothermal decomposition, showing large specific surface area and cluster formation of nanoparticles. Vanadium is tetracoordinated on the surface of anatase TiO2, with some V4+ substituting Ti4+ ions in the lattice, enhancing redox properties.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Zhihua Lian, Long Liu, Chunxi Lin, Wenpo Shan, Hong He
Summary: In this study, a V2O5/TiO2 catalyst showed improved NH3-SCR activity after hydrothermal aging due to increased surface VOx density and the interaction between vanadia and titania.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Kazushige Yokoyama, Akane Ichiki
Summary: The affinity between the S protein of SARS-CoV-2 and gold nano-particles was examined through spectral shifts of the SPR band, revealing significant changes in the interaction between the two at different pH values.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Nadja Groysbeck, Victor Hanss, Mariel Donzeau, Jean-Marc Strub, Sarah Cianferani, Daniele Spehner, Mounib Bahri, Ovidiu Ersen, Mikhael Eltsov, Patrick Schultz, Guy Zuber
Summary: Advances in cryo-electron microscopy have allowed for near-native imaging of protein assemblies within mammalian cells. Gold nanoparticles have been synthesized and functionalized to bind to specific intracellular targets and be detected in vitreous sections. Cryo-EM of vitreous cell sections demonstrates the presence of these biofunctionalized gold nanoparticles in the nucleus, making them powerful labeling tools for cellular cryo-EM.
Article
Chemistry, Physical
Keigo Kamata, Nanami Kinoshita, Maki Koutani, Ryusei Aono, Eri Hayashi, Michikazu Hara
Summary: Beta-MnO2 nanoparticles with high specific surface areas were synthesized successfully and exhibited excellent catalytic activity and selectivity in the oxidation reaction of aromatic and heteroaromatic alcohols. The catalyst could also be used for the one-pot synthesis of nitriles and amides in the presence of ammonia, without the need for additional additives.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Shixuan Yu, Xiaowei Niu, Zijian Song, Xu Huang, Yue Peng, Junhua Li
Summary: The Al2O3 doped catalyst showed improved performance in terms of active temperature range, NOx and CB removal efficiencies, resistance to SO2, and reduction of polychlorinated byproducts compared to the SiO2 doped catalyst and V2O5-MoO3/TiO2. The enhanced low temperature activity is attributed to the promotion of vanadia reducibility by interactions between V2O5 and Al2O3, while the high temperature activity is due to additional surface acidities provided by Al2O3, with Lewis acid sites playing a predominant role. Al2O3 is suggested as an effective addition to vanadia-based catalysts for simultaneous removal of NOx and CB from stationary sources.
Article
Chemistry, Multidisciplinary
Stefano Scurti, Eleonora Monti, Elena Rodriguez-Aguado, Daniele Caretti, Juan Antonio Cecilia, Nikolaos Dimitratos
Summary: This study investigated the effects of PVA stabilizers and AuNPs/AC on catalytic activity, exploring the synthesis of polymers with different molecular weights and hydrolysis degrees and analyzing characterization techniques. The relationship between catalytic performance and hydrolysis degree was determined through a volcano plot, with the optimal catalytic activity observed at 60%. Furthermore, the study examined the impact of polymer amount on catalytic properties.
Article
Chemistry, Multidisciplinary
Zhongxu Guo, Zhongtian Du, Yanbin Zhao, Xiaoyu Shen, Changhai Liang
Summary: This study presents a new approach for the selective hydration of nitriles using vanadium-nitrogen-carbon materials as catalysts. Compounds with different N and O atoms were found to have a significant impact on the reaction. This work expands the application of non-precious metal catalysts for nitrile hydration reactions.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Marzook S. Alshammari, Kadi Y. Museery, Ahmad S. Alshammari, Raja L. Al Otaibi, Ali A. Yousif, Abbasher Gismelseed, O. M. Lemine
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Engineering, Chemical
Ahmed Sadeq Al-Fatesh, Mayankkumar Lakshmanbhai Chaudhary, Anis Hamza Fakeeha, Ahmed Aidid Ibrahim, Fahad Al-Mubaddel, Samsudeen Olajide Kasim, Yousef Abdulrahman Albaqmaa, Abdulaziz A. Bagabas, Rutu Patel, Rawesh Kumar
Summary: The production of H-2 through dry reforming of methane (DRM) is a hot topic due to environmental concerns, and loading NiO onto modified γ-Al2O3 results in efficient and thermally stable catalyst systems. Different modifiers can alter the interaction between NiO and the support, affecting the catalytic performance.
Article
Materials Science, Multidisciplinary
Mohamed F. Aly Aboud, Zeid A. ALOthman, Abdulaziz A. Bagabas
Summary: By nitrogen doping with ammonia treatment and platinum nanoparticle decoration, the methane and carbon dioxide storage capacities of activated carbon were enhanced, with a preference for CO2 storage. Nitrogen doping improved micropore properties, while platinum decoration had an opposite effect on gas storage.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Physical
Abualiz Modwi, Abdullah S. Al-Ayed, Damra E. Mustafa, Abdulaziz A. Bagabas, M. R. Elamin, Faisal K. Algethami, Rasheed Arasheed, Mohammed Q. Alfaifi, Ali Alqarni, Fayez Alotaibi, Kamal K. Taha
Summary: This study successfully synthesized zinc oxide nanoparticles using plant extracts through a simple, green chemistry method, demonstrating their potential and sustainability in nanomaterial synthesis. Comprehensive analyses using techniques like XRD, SEM, XPS, and UV-visible spectroscopy provided insights into the structure, morphology, chemical properties, and optical performance of the synthesized nanoparticles, showing their effectiveness in photocatalytic dye degradation.
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Abdulaziz A. Bagabas, Murad Alsawalha, Kamal K. Taha, Abdelhamid Albaid, Manzar Sohail, Mahdi Alqahtani, Rasheed Alrasheed, Abdulaziz Alqarn, Bandar Ashamari, Ivan P. Parkin
Summary: A new organic-inorganic hybrid salt of cyclohexylammonium hexaisothiocyanatochromate(III) sesquihydrate was successfully synthesized and characterized by various analytical techniques. The thermal stability, morphology, and textural properties of the salt were investigated, revealing the formation of nanocrystalline chromium oxide and chromium sulfide as well as the mesoporous nature and high specific surface area of the compounds.
Article
Chemistry, Multidisciplinary
Mohamed F. Aly Aboud, Zeid A. ALOthman, Abdulaziz A. Bagabas
Summary: The research focused on improving hydrogen storage performance of activated carbon through methods like ammonia treatment and metal decoration. It was found that metal decoration had different effects on hydrogen storage at different temperatures, potentially overcoming hydrogen spillover at low temperatures but having the opposite effect at room temperature.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Abdulaziz Bagabas, Ahmed Sadeq Al-Fatesh, Samsudeen Olajide Kasim, Rasheed Arasheed, Ahmed Aidid Ibrahim, Rawan Ashamari, Khalid Anojaidi, Anis Hamza Fakeeha, Jehad K. Abu-Dahrieh, Ahmed Elhag Abasaeed
Summary: A new nickel-based catalyst with MgO promoter showed efficient performance in the dry reforming of methane process, achieving high conversion rates and low carbon deposition. The study highlights the importance of catalyst composition in improving the DRM process efficiency and sustainability.
Article
Chemistry, Multidisciplinary
Masfer Alkahtani, Anas Ali Almuqhim, Hussam Qasem, Najla Alsofyani, Anfal Alfahd, Sultan M. Alenzi, Abdulaziz Aljuwayr, Yahya A. Alzahrani, Abdurahman Al-Badri, Mohammad Hayal Alotaibi, Abdulaziz Bagabas, Abdulaziz N. AlHazaa, Philip R. Hemmer
Summary: This work presents an easy and efficient method to synthesize high quality lithium-based upconversion nanoparticles that can enhance the photovoltaic performance of perovskite solar cells. By incorporating these nanoparticles into the mesoporous layer of the cells, a higher power conversion efficiency, additional photocurrent, and a better fill factor were achieved, demonstrating potential for efficient perovskite solar cells in renewable energy applications.
Article
Crystallography
Mohamed F. Aly Aboud, Abdulmalik M. BinTaleb, Hamdi Ben Yahia, Abdelhamid Albaid, Sultan Albishi, Rasheed Arasheed, Ibrahim Albinali, Fahad Albaqi, Khalid Anojaidi, Fahad Alqahtani, Asma M. Alenad, Kamal Taha, Abdulaziz Bagabas
Summary: Cyclohexylammonium hexaisothiocyanatonickelate(II) dihydrate was synthesized and fully characterized. It was used as a single-source precursor for the synthesis of mesoporous, high surface area nickel oxide and nickel sulfide via pyrolysis. The obtained NiO and NiS exhibited nanocrystalline nature, high surface area, porosity, and showed great potential for various applications.
Article
Chemistry, Physical
Virendra Kumar Yadav, Govindhan Gnanamoorthy, Krishna Kumar Yadav, Ismat H. Ali, Abdulaziz A. Bagabas, Nisha Choudhary, Shalini Yadav, Rajendran Suriyaprabha, Saiful Islam, Shreya Modi, Marina Cabral-Pinto
Summary: With the increasing demand for metal oxides and the decline in reserves, exploring alternatives becomes urgent. This article proposes a method to recover valuable minerals from incense stick ash and confirms the synthesized materials.
Article
Materials Science, Multidisciplinary
Mohamed F. Aly Aboud, Zeid A. ALOthman, Abdulaziz A. Bagabas
Summary: This study investigates the effects of ammonia treatment and metal decoration on the CO2 and CH4 storage capabilities of activated carbons. The results show that CO2 has a higher storage capacity compared to CH4, making it suitable for upgrading natural gas and removing it from flue gases at ambient conditions.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Physical
Abdulrahman A. Al-Rabiah, Ismail Boz, Vagif M. Akhmedov, Mohamed Mokhtar M. Mostafa, Abdulaziz A. Bagabas
Summary: This study reports a single-step gas-phase green synthesis of isopropyl alcohol (IPA) via acetone hydrogenation under ambient pressure. Composite catalysts consisting of ruthenium nanoparticles supported on activated charcoal and nano-zinc oxide were used, resulting in high yields and selectivity of IPA. The immobilized Ru catalysts showed excellent catalytic performance under mild green synthesis conditions.
Article
Chemistry, Physical
Salwa B. B. Alreshaidan, Ahmed Al-Fatesh, Mahmud S. S. Lanre, Yousef M. M. Alanazi, Ahmed A. A. Ibrahim, Anis H. H. Fakeeha, Fahad Albaqi, Khalid Anojaidi, Abdulaziz Bagabas
Summary: The dry reforming of methane (DRM) was studied using Ni-based catalysts promoted with various amounts of gadolinium oxide. The addition of 4.0 wt.% gadolinium resulted in the best catalyst performance, with around 80% and 86% conversions of CH4 and CO2, respectively. The gadolinium oxide improved the catalyst basicity and interaction with the support, leading to higher coke resistance and stability.
Article
Chemistry, Physical
Radwa A. El-Salamony, Ahmed S. Al-Fatesh, Kenit Acharya, Abdulaziz A. M. Abahussain, Abdulaziz Bagabas, Nadavala Siva Kumar, Ahmed A. Ibrahim, Wasim Ullah Khan, Rawesh Kumar
Summary: Samarium oxide (Sm2O3) is a versatile surface for CO2 and H-2 interaction and conversion. Different catalysts supported by samarium oxide, including Ni, Co-Ni, and Ru-Ni, were tested for CO2 methanation and characterized through multiple techniques. The results showed that the selectivity of CH4 was around 98%, while the selectivity of CO varied depending on the catalyst composition. Co-impregnation of cobalt with nickel over Sm2O3 resulted in higher CO selectivity, while co-impregnation of ruthenium and nickel led to carbonate species and high CH4 selectivity.
Article
Chemistry, Multidisciplinary
Jehad Saleh, Ahmed Sadeq Al-Fatesh, Ahmed Aidid Ibrahim, Francesco Frusteri, Ahmed Elhag Abasaeed, Anis Hamza Fakeeha, Fahad Albaqi, Khalid Anojaidi, Salwa B. B. Alreshaidan, Ibrahim Albinali, Abdulrahman A. A. Al-Rabiah, Abdulaziz Bagabas
Summary: The impact of rhodium oxide (Rh2O3) doping on the activity and stability of nickel catalysts supported over yttria-stabilized zirconia in dry reforming of methane (DRM) was studied at 800 degrees C using various characterization techniques. The addition of 4.0 wt.% Rh2O3 enhanced the activation of the catalysts and reduced the surface basicity, leading to optimal conversions of CH4 and CO2 of around 89% and 92%, respectively. The incorporation of Rh2O3 in the range of 0.0-4.0 wt.% loading improved DRM and reduced the reverse water gas shift effect, resulting in increased stability by decreasing carbon formation on the catalysts.
