Article
Chemistry, Applied
Feraih Alenazey, Bandar AlOtaibi, Raja A. L. Otaibi, Yousef Alyousef, Salma Alqahtania, Amjad Qazaq, Umer Zahid, Dai-Viet N. Vo, Adesoji Adesina
Summary: The study evaluated a perovskite catalyst for methane dry reforming and found that it exhibited superior performance and good stability in a carbon-rich environment. This was attributed to electronic interactions between components in the multicomponent oxide catalyst prepared by sol-gel synthesis.
TOPICS IN CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Min -Jae Kim, Seon Joo Park, Ki Duk Kim, Woohyun Kim, Sung Chan Nam, Kang Seok Go, Sang Goo Jeon
Summary: This study investigates the catalytic activity of CeO2-supported Co, Fe, and Ni catalysts in the catalytic decomposition of methane (CDM) for carbon nanotube (CNT) synthesis, with a focus on the effects of CeO2 on the activity of the active metals. The results show that Ni/CeO2 exhibits good catalytic performance at a relatively low temperature of 600 degrees C, and the catalysts were characterized using various analysis methods. Additionally, the morphology and properties of the carbon material grown on the catalysts were examined.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Energy & Fuels
Mandana Khaksar, Layth S. Jasim, Makarim A. Mahdi, Waleed K. Abdulsahib, Mehdi Mousavi-Kamazani, Masoud Salavati-Niasari
Summary: This study focuses on the hydrogen storage ability of sol-gel synthesized Ce2Y2O7 nanoribbons as active materials. The impact of different carbonous materials (such as graphene oxide, nitrogen-doped graphene quantum dots, and g-C3N4) on the hydrogen storage capacity of Ce2Y2O7 nanoribbons was compared. The carbonous nanocomposites provided were characterized using various methods to identify their phase purity, shape, and porosity. Galvanostatic charge-discharge profiles were performed for all samples to achieve optimal capacitance. The results showed that the nanocomposites of GO/Ce2Y2O7, N-GQDs/Ce2Y2O7, and g-C3N4/Ce2Y2O7 had maximum discharge capacities of 656, 686, and 757 mAhg(-1), respectively, while pristine Ce2Y2O7 nanoribbons had a discharge capacity of 643 mAhg(-1) after 15 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Jeong-Hyeon Kim, Jongyun Choi, Hyunseok Na, Sung-Nam Lee
Summary: Recently, sol-gel-derived ZnO thin films have been studied for high-performance photodetectors, but they have lower crystallinity compared to vacuum-based grown ZnO films, resulting in poor photoreaction. This study combines a SWCNT heating system with sol-gel ZnO-based UV PDs, resulting in a significant improvement in photocurrent and response time. The embedded-SWCNT heater increases the temperature, leading to shorter rise and decay times of the sol-gel-derived ZnO PDs.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Polymer Science
Ruolin Han, Yuping Liu, Jinchao Shi, Guang-Xin Chen, Qifang Li
Summary: In this study, a core-shell structured hybrid powder (STO@MWCNTs) was prepared by coating strontium titanate (STO) on the surface of carbon nanotubes (MWCNTs) using a sol-gel method. This powder was then added to polydimethylsiloxane to create a flexible high-K composite. The STO coating effectively prevented the overlap and agglomeration of MWCNTs, improving the dielectric properties of the composite.
Article
Green & Sustainable Science & Technology
Jing Xia Qian, Da Bin Liu, Jean Marie Basset, Lu Zhou
Summary: In this study, iron-containing materials from natural, industrial raw materials, by-products or wastes were investigated as catalysts for methane decomposition. The Fe2O3 species on these materials were found to be gradually reduced by methane to active Fe-0 species, which led to the formation of carbon nano-materials. The optimized reaction conditions for the highest carbon/hydrogen yield were determined to be 900 degrees C and 3 L/g(cat).h.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Reeya Garg, Mohit Jaiswal, Kaustubh Kumar, Komalpreet Kaur, Bhawna Rawat, Kamalakannan Kailasam, Ujjal K. Gautam
Summary: This study investigates an efficient composite material based on carbon nanostructures and non-noble metals, which exhibits high half-wave potential and electrocatalytic performance. The enhanced activity is attributed to the synergistic effect of high conductivity of carbon nanotubes and active Fe sites. In situ growth of CNTs prevents mass loss during catalyst material synthesis.
Article
Chemistry, Multidisciplinary
Reeya Garg, Mohit Jaiswal, Kaustubh Kumar, Komalpreet Kaur, Bhawna Rawat, Kamalakannan Kailasam, Ujjal K. Gautam
Summary: Achieving high electrocatalytic performance using a composite material of carbon nanotubes and non-noble metals can minimize metal loss and retain a high metal content, leading to efficient electrocatalysis.
Article
Chemistry, Multidisciplinary
Yicheng Xing, Zheng Yao, Wenyuan Li, Wenting Wu, Xiaoqing Lu, Jun Tian, Zhongtao Li, Han Hu, Mingbo Wu
Summary: By fabricating heterogeneous Fenton-type Fe-based catalysts containing Fe-N-x sites and Fe/Fe3C nanoparticles, the competition between the efficient utilization of H2O2 and undesired O-2 generation was studied. With finely tuned active sites, a high conversion rate for the selective oxidation of methane and excellent product selectivity were achieved, while O-2 generation was significantly suppressed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Ceramics
Tarcizo da Cruz C. de Souza, Ana Cristina de Oliveira Melo, Tiago Campolina Barbosa, Carlos Viana Martins, Luiz Orlando Ladeira, Manuel Houmard
Summary: Nanostructured silica synthesized by sol-gel method was used as a support for multi-walled carbon nanotubes synthesis through catalytic chemical vapor deposition process. Three different methods to incorporate the iron-based catalyst on the silica support were studied to identify its influence on the structural characteristics of the synthesized MWCNTs, aiming to develop advanced hybrid composites with better structural properties. Characterization of the synthesized hybrid composites showed modifications in terms of graphitization degree, morphology, and thermal stability of the MWCNTs, influenced by the catalyst incorporation method.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Anant Prakash Pandey, M. A. Shaz, V. Sekkar, R. S. Tiwari
Summary: Resorcinol-formaldehyde (R-F) aerogels were synthesized using acid and base catalyzed sol-gel process followed by supercritical drying and ambient pressure drying. The effect of catalyst type and drying methods on the characteristics of the aerogels were investigated. Base catalysis and supercritical drying resulted in higher micropore density and more uniform pore distribution. The carbonized aerogels showed significant hydrogen uptake at room temperature and liquid nitrogen temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Anwesa Mukherjee, Mainul Akhtar, Jeng-Kuei Chang, Susanta Banerjee, Subhasish Basu Majumder
Summary: A novel NTP/GO/CNT nanocomposite anode material was reported, in which NTP particles were engineered with rGO and CNT. The NTP-rGO10-CNT10 electrode exhibited excellent electrochemical performance, including high specific capacity (124 mA h g-1 at 100 mA g-1), remarkable high-rate cycleability (62.5% capacity retention after 400 cycles at 10 C), and excellent rate capability (87 mA h g-1 at 25C). The capacitive and faradaic contributions to total capacities of the composite electrode were estimated by cyclic voltammetry investigation.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Energy & Fuels
Foroozan Samimi, Maryam Ghiyasiyan-Arani, Masoud Salavati-Niasari
Summary: A series of Ca-Mn-O based nanostructures were synthesized through a sol-gel procedure assisted by leucine. The effect of Ca:Mn ratio in the synthesis process was examined to study the purity and components of samples. The resulting Ca2Mn3O8/CaMn3O6 nanocomposites showed promising electrochemical hydrogen storage capacity, making them a potential active material in energy storage systems.
Article
Chemistry, Analytical
Dmitry Petrov, Ivan Matrosov
Summary: In this study, a technique for natural gas analysis based on polarized Raman spectroscopy is presented. By using only the isotropic components of spectra, the procedure for extracting concentrations is simplified and the measurement accuracy is improved for components with spectral overlap. This technique is of great importance in the analysis of multicomponent gas mixtures and the measurement of isotopic composition.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Irshad Ahmad, Shazia Shukrullah, Muhammad Yasin Naz, Muhammad Athar Rasheed, Mukhtar Ahmad, Ejaz Ahmed, Muhammad Shoaib Akhtar, N. R. Khalid, Abid Hussain, Sadia Khalid
Summary: Decorating carbon nanotubes onto Sr doped ZnO nanoparticles resulted in a highly efficient photocatalyst for hydrogen evolution under visible light illumination. The improved hydrogen evolution activity of Sr doped ZnO/CNTs is attributed to high surface area, Sr doping, and construction of heterojunction, extending light absorption and improving charge separation. The proposed photocatalytic mechanism is based on Mott-Schottky study, explaining the interfacial charge transfer process from ZnO to CNTs and Sr.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Majid L. Balogun, Wasim Ullah Khan, M. Nasiruzzaman Shaikh, Sagir Adamu, Abeer S. Arjah, Saad A. Al-Bogami, Sameer Al-Ghamdi, Mohammad M. Hossain
Summary: A redox catalyst with MoO3 loaded on CaMnO3 perovskite was used for chemical-looping oxidative dehydrogenation (ODH) of propane to produce propylene. This catalyst showed a lower energy consumption and minimum CO2 emission, making it environmentally friendly. Experimental results indicated that MoO3 incorporation minimized the release of surface oxygen and improved propylene selectivity. The catalyst exhibited stable activity in successive redox cycles, and the addition of MoO3 enhanced propylene yield and selectivity by promoting the formation of lattice oxygen.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Chemical
Md Khairul Bahar, Hassam Mazhar, Wasim Ullah Khan, Mamdouh Ahmed Al-Harthi
Summary: This paper reports the in situ synthesis of ethylene-propylene (EP) copolymer, its terpolymer with styrene, and composites with nickel-chromium (NiCr) layered double hydroxide (LDH), as well as their thermal properties. The addition of styrene significantly increased the yield of EP, but had negative effects on crystallinity, melting temperature, and thermal stability. Incorporation of NiCr LDH adversely affected the thermal stability of the terpolymer, but ultrasonication treatment improved it.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Ahmed S. Al-Fatesh, Naitik Patel, Anis H. Fakeeha, Mohammed F. Alotibi, Salwa B. Alreshaidan, Rawesh Kumar
Summary: This article provides a comprehensive review of the major developments in the field of dry reforming reaction (DRM) over the past two decades. It covers the extensive research on various doped metal oxides, supported metal catalysts, and catalytic systems for this reaction. The review also includes an overview of the effects of 8 active metals on 12 different support systems, as well as a detailed literature review of 35 promoters from different groups of the periodic table. Lastly, it presents the current state-of-the-art in potential industrial catalysts and future research directions for catalytic advancement.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
S. Santhosh, P. Tamizhdurai, C. Kavitha, V. L. Mangesh, Nadavala Siva Kumar, Praveen Kumar Basivi, Ahmed S. Al-Fatesh, R. Kumaran
Summary: This study successfully converts propylene glycol into hydroxyacetone for the first time using a continuous reactor. The catalyst used in the study is copper-infused sulfated zirconium oxide nanoparticles supported on reduced graphene oxide, which shows excellent catalytic activity and stability. The catalyst is created through a simple and straightforward synthesis process using affordable and easily accessible ingredients. This research provides a new method for the preparation of efficient, cost-effective, and environmentally friendly catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Energy & Fuels
Ahmed S. Al-Fatesh, Najib Y. A. AL-Garadi, Ahmed I. Osman, Fahad S. Al-Mubaddel, Ahmed A. Ibrahim, Wasim U. Khan, Yousef M. Alanazi, Maher M. Alrashed, Othman Y. Alothman
Summary: Hydrogen, as an energy carrier, has the potential to replace fossil fuels and reduce environmental pollution. The accumulation of plastic waste materials poses a severe burden on the environment due to the increasing demand for plastics. Thermo-catalytic conversion of plastic waste materials to hydrogen and other fuels is a promising long-term solution to this environmental challenge, but the development of durable and high-efficiency catalysts is a potential challenge for researchers.
Article
Chemistry, Analytical
Xina Huang, Yanyan Zou, Yaoqiang Li, Yong Zhang, Yuanyuan Xu, Zhaoyu Ye, Fang Tang, Kaiyuan Li
Summary: This study investigates the production capacity and mechanism of hydrogen (H2) from the pyrolysis of polyether ether ketone (PEEK) at high temperatures. The results show that H2 is primarily produced in two pyrolysis stages, with the main sources being the cracking of C-H bonds and the dehydrogenation of benzene rings. This finding sheds new light on the mechanisms of H2 production and resource utilization of plastics for the future.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Energy & Fuels
Ahmed A. Ibrahim, Ahmed S. Al-Fatesh, Norah Alwadai, Salma A. Al-Zahrani, Jehad K. Abu-Dahrieh, Ahmed E. Abasaeed, Anis H. Fakeeha
Summary: This study investigates the promotion impact of strontium doping on a nickel-based catalyst for methane dry reforming. The results show that the loading of strontium has little effect on the texture of the catalyst, but it increases the number of reducible nickel oxide species on the catalyst surface. The 5Ni+2Sr-9La+Zr catalyst exhibits high conversion rates and low deactivation factor. The study also reveals that strontium doping can tune the activity and basicity of the catalyst, improving the performance of methane dry reforming.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Ahmed S. S. Al-Fatesh, Kenit Acharya, Ahmed I. I. Osman, Anish H. H. Fakeeha, Ahmed A. A. Ibrahim, Abdulaziz A. M. Abahussain, Abdulaziz Bagabas, Ahmed E. E. Abasaeed, Rawesh Kumar
Summary: Rh-promoted YZr-supported Ni catalyst (5Ni/YZr) was studied for DRM and characterized with various techniques. Addition of 4 wt% Rh to 5Ni/YZr resulted in the generation of multiple stable active sites, enhanced basic sites, and CO2-interacted surface species. This led to higher H2 and CO yields, with 5Ni4Rh/YZr catalyst maintaining around 80% H2 yield after 27 hours of DRM reaction.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Anis H. Fakeeha, Kenit Acharya, Ahmed A. Ibrahim, Ghzzai Almutairi, Jehad K. Abu-Dahrieh, Ahmed E. Abasaeed, Rawesh Kumar, Ahmed S. Al-Fatesh
Summary: Dry reforming of methane (DRM) is a promising method to convert methane and carbon dioxide into synthetic feedstock syngas. The use of yttria-zirconia supported nickel catalysts can achieve high methane conversion rates, and the addition of a small amount of second metal oxide further promotes the catalytic activity. The characterization results show a good correlation with the catalytic activity.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Ahmed S. Al-Fatesh, Ahmed A. Ibrahim, Ahmed I. Osman, Ahmed E. Abasaeed, Mohammed F. Alotibi, Sadeq A. Alfatesh, David W. Rooney, Anis H. Fakeeha, Chun-Yang Yin
Summary: This study reports the performance of a cobalt-aluminum-strontium catalyst for dry reforming reaction to produce syngas. The characteristics of the catalyst and the effects of optimized Sr loading on catalytic performance were evaluated using various analytical techniques.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Hamid Ahmed, Mohammed F. Alotibi, Anis H. Fakeeha, Ahmed A. Ibrahim, Ahmed E. Abasaeed, Ahmed I. Osman, Abdulrahman S. Al-Awadi, Naif Alarifi, Ahmed S. Al-Fatesh
Summary: The decomposition of methane has been selected for hydrogen production using iron-based catalysts supported on TiO2-Al2O3. Catalysts calcined at 500°C showed the best performance with over 80% hydrogen yield and the production of graphitic carbon and carbon nanotubes.
Article
Chemistry, Multidisciplinary
Abdulaziz A. M. Abahussain, Ahmed S. Al-Fatesh, Naitik Patel, Salwa B. Alreshaidan, Nouf A. Bamatraf, Ahmed A. Ibrahim, Ahmed Y. Elnour, Jehad K. Abu-Dahrieh, Ahmed E. Abasaeed, Anis H. Fakeeha, Rawesh Kumar
Summary: In this study, a 5Ni/xMg(100 - x)Al (x = 0, 20, 30, 60, 70, and 100 wt. %) catalyst system was prepared by adding different ratios of MgO into the Al2O3 support. The results showed that the addition of 20% MgO increased the number of stable Ni sites and CO2-interacting species in the 5Ni/20Mg80Al catalyst, resulting in higher H-2 yield and excellent carbon-resistant property. In the magnesia-alumina support system, Ni dispersed in weight ratios of 7/3 and 3/7 exhibited good resistance to coke.
Article
Chemistry, Physical
Ahmed A. Ibrahim, Anis H. Fakeeha, Ahmed E. Abasaeed, Irfan Wazeer, Abdulaziz Bentalib, Nadavala Siva Kumar, Jehad K. Abu-Dahrieh, Ahmed S. Al-Fatesh
Summary: This study investigates the carbon dioxide reforming of methane using bimetallic Ni catalysts in a microreactor. The most active catalyst is found to be 2.5Ni+2.5Co/37%Al2O3+63%MgO, which exhibits high conversions of methane and carbon dioxide. Other bimetallic catalysts also show good activity and stability.
Article
Chemistry, Physical
Ahmed E. Abasaeed, Syed Farooq Adil, Mufsir Kuniyil, Hamid Ahmed, Ahmed A. Ibrahim, Anis H. Fakeeha, Ahmed S. Al-Fatesh
Summary: This study synthesized spinel nickel aluminate samples doped with different percentages of Fe(x)Oy nanoparticles and characterized them using various techniques. It was found that the nanocomposite with 5% FexOy doping exhibited the highest catalytic activity and selectivity at 600℃, with a gradual increase in methane conversion and stable performance over 4 hours.
Article
Chemistry, Physical
Maira Liaqat, Tahir Iqbal, Iqra Maryam, Khalid Nadeem Riaz, Sumera Afsheen, Muhammad Sohaib, Nabil Al-Zaqri, Ismail Warad, Ahmed S. Al-Fatesh
Summary: In this study, the concentrations of BiVO4, Cu2O, and graphene were carefully monitored during the synthesis of BiVO4/Cu2O/graphene nanocomposites via hydrothermal method. The effects of different concentrations of graphene, time duration, and heat treatment temperature on the synthesized samples were investigated. The optical characteristics, vibrational analysis, morphology, structural analysis, and photocatalytic activity of the samples were examined through various characterizations. The influence of different graphene ratios on the photocatalytic efficiency and stability of the nanocomposite BiVO4/Cu2O was investigated. The stability of the monoclinic phase of BiVO4 was found to be affected by the concentrations of BiVO4 and Cu2O. Nanosheets composites with an average size of 100 nm were observed in SEM micrographs. The sample with the lowest e(-)-h(+) recombination rate exhibited the optimized photocatalytic activity. The optimized sample BiVO4/Cu2O/G5 achieved a high degradation efficiency of 96% for rhodamine-B (RhB) and 98% for tetracycline (TC) under visible light irradiation. The photocatalytic mechanism was studied using scavengers. The stability of the optimal sample was evaluated through recyclability tests. The degradation kinetics of RhB and TC were also examined to explore the photocatalytic performance.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)