Article
Nanoscience & Nanotechnology
Zi-Han Hsu, Li Hsu, Chia-Chi Huang
Summary: This report introduces a method for preparing polyacrylamide materials with unique surface morphology. By cross-linking and reduction reactions, the smooth polymer surface is transformed into submicron cubic clusters impregnated with silver nanoparticles. The resulting material resembles the Great Barrier Reefs in overall morphology and features a high content of active silver nanostructures. It demonstrates versatility in surface-enhanced Raman scattering and methanolysis catalysis. These methods enlarge the surface area of the shape-adapting polymer material while generating minimal chemical waste.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Alhulw H. H. Alshammari, Khulaif Alshammari, Turki Alotaibi, Majed Alshammari, Sultan Alhassan, Taha Abdel Mohaymen Taha
Summary: The nanocomposites of S@g-C3N4 and NiS-g-C3N4 with different NiS concentrations were synthesized and characterized. The NiS-g-C3N4 nanocomposites showed increased porosity and improved photocatalytic performance. The highest hydrogen production rate was achieved with the sample containing 1.5 wt.% NiS nanosheet.
Article
Chemistry, Physical
Medhen W. Abebe, Anteneh F. Baye, Hern Kim
Summary: In this study, an interpenetrating polymer network (IPN) strategy was utilized to prepare a recyclable polymeric catalyst for catalytic methanolysis of NaBH4 to produce hydrogen gas. The catalyst exhibited excellent cyclic performance and prolonged catalyst life.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Cafer Saka
Summary: In this study, activated carbons prepared from microalgae with KOH activation were used for the first time as sulphur (S) and phosphorus (P) doped metal-free carbon catalysts in NaBH4 methanolysis reaction, showing a high hydrogen generation rate and low activation energy. After five cycles, the catalyst retained 59% of its initial catalytic activity, demonstrating the potential for environmentally friendly efficient catalytic reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Duygu Elma Karakas, Mustafa Kaya, Sabit Horoz
Summary: This study aims to utilize waste banana peels as biomass and examine its contribution to hydrogen generation rate. The researchers used acid catalyst to functionalize the banana peels and found that it increased the hydrogen generation rate significantly and reduced the activation energy.
Article
Energy & Fuels
Cafer Saka
Summary: Metal-free carbon catalysts doped with sulfur and phosphorus were prepared from activated carbon obtained from microalgae, showing high hydrogen generation rate and low activation energy in NaBH4 methanolysis. The catalytic activity was attributed to the synergistic effects of porous structure and P- and S-containing active sites, providing a new strategy for environmentally friendly efficient catalytic reactions.
Article
Chemistry, Physical
Sultan Butun Sengel, Hatice Deveci, Vural Butun
Summary: Poly[2-(dimethylamino)ethyl methacrylate] cryogel beads were prepared as a catalyst for hydrogen production from NaBH4 by alcoholysis. The catalyst's efficiency was tested in the temperature range of 0-40°C and showed higher reaction rates for methanolysis compared to ethylene glycolysis. After six repetitions, the catalyst activity remained above 50% for both reactions. Published by Elsevier Ltd.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Duygu Elma Karakas
Summary: In this study, orange peel was used as a metal-free catalyst for hydrogen production from sodium boron hydride. The catalyst was prepared by treating the orange peel with phosphoric acid and burning it at a specific temperature and time. The catalytic activity of the catalyst was characterized and the hydrogen generation rates and activation energy were determined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Cafer Saka
Summary: The metal-free catalyst SP-KOH-P doped with phosphorus and oxygen was used to produce hydrogen from the methanolysis of NaBH4. The catalyst showed a high hydrogen production rate of 19,500 mL min(-1) g(-1) with an activation energy value of 38.79 kJ mol(-1).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Taghreed M. Fagieh, Esraa M. Bakhsh, Sher Bahadar Khan, Kalsoom Akhtar, Abdullah M. Asiri
Summary: This study successfully converted food waste into efficient materials for pollutant treatment using alginate/banana peel beads as adsorbents and catalysts, showing high efficiency and selectivity in reducing pollutants like 4-NP and other wastes.
Article
Chemistry, Physical
Cafer Saka, Asim Balbay
Summary: Metal-free catalysts were produced from apricot kernel shells for efficient H-2 generation from NaBH4 methanolysis. The catalysts were activated through a two-step process and characterized for their structure and properties. The results showed that the metal-free catalyst exhibited a high hydrogen production rate and low activation energy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Sahin Demirci, S. Duygu Sutekin, Olgun Guven, Nurettin Sahiner
Summary: Poly(2-aminoethyl methacrylate) (p(AEM)) microgels were synthesized and used for metal nanoparticle preparation. These microgels were then incorporated into p(AEM) based poly ionic liquid (PIL) microgels, which served as catalysts for hydrogen production from sodium borohydride (NaBH4) reactions. The catalytic activity and regeneration ability of the microgels were analyzed, showing promising results.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Cafer Saka
Summary: Metal-free catalysts containing phosphorus and oxygen were prepared by modifying activated carbon obtained from Chlorella Vulgaris microalgae with phosphoric acid. These catalysts showed excellent hydrogen production rates and relatively low activation energy, demonstrating high efficiency in hydrogen generation reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yasar Karatas, Adem Zengin, Mehmet Gulcan
Summary: This study reports the fabrication, characterization, and application of amine-terminated CuMnO2-NH2 supported palladium nanoparticles as highly efficient and recyclable catalysts for hydrogen production from the methanolysis of ammonia-borane. The results reveal that Pd (0) nanoparticles are well spread on the surface of CuMnO2-NH2, and Pd/CuMnO2-NH2 exhibits high catalytic activity and extreme stability in the reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Polymer Science
Shamsuddeen A. Ahmad, A. L. Lewis, G. Parkes, Y. Tang, L. J. Waters
Summary: This study focuses on the analysis and characterisation of water content and drug-bead interactions in polyvinylalcohol (PVA) hydrogel polymer beads. It confirms the capability of TGA and DSC to characterise different types of water within the beads and indicates relative changes in water content in the presence of drugs. The findings have significant implications for understanding drug loading and release in cancer treatment.
Article
Agriculture, Dairy & Animal Science
Atta Muhammad Memon, Fangzhou Chen, Sher Bahadar Khan, Xiaozhen Guo, Rajwali Khan, Farhan Anwar Khan, Yinxing Zhu, Qigai He
Summary: In this study, a simple, swift, cost-effective, highly specific, and sensitive antigen-capture enzyme-linked immunosorbent assay (AC-ELISA) was developed for detection of porcine rotavirus-A (PoRVA). The AC-ELISA efficiently detected PoRVA from clinical samples and showed no cross-reactivity with other porcine viruses. This technique can be used for large-scale surveillance and timely detection of rotavirus infection in the porcine farms.
ANIMAL BIOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Shahid Ahmad, Sher Bahadar Khan, Abdullah M. Asiri
Summary: In this study, hydrogel beads were fabricated using a viscous solution of sodium alginate polymer containing dispersed silica. The hydrogel beads were then modified with five different types of metal to create metal coated catalysts. These catalysts were further converted into zero-valent metal nanoparticles using NaBH4. The Cu0/Si@AlgBDs catalyst showed the highest efficiency in the reduction of 4-NP to 4-AP and was chosen for further study. It also demonstrated excellent catalytic activity in the decolorization of various compounds and in the generation of H2 gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Noureen Khan, Bibi Shahida, Shahid Ali Khan, Zubair Ahmad, Saeeduddin, Ziviqar Sheikh, Esraa M. Bakhsh, Haneen M. Alraddadi, Taghreed M. Fagieh, Sher Bahadar Khan
Summary: In this study, a composite film (CMC-PSIS) was prepared by dispersing carboxymethyl cellulose (CMC) in a polystyrene block polyisoprene block polystyrene polymer (PSIS) using a simple casting technique. Cu and Ni ions were adsorbed onto CMC-PSIS and then converted into Cu-0 and Ni-0 nanoparticles (NPs) in the presence of NaBH4. The prepared catalysts were characterized and used for the reduction/degradation of four model pollutants. The results showed that CMC-PSIS/Cu exhibited the highest rate constant for the degradation of methyl orange, while Cu NPs showed the shortest reaction time. CMC-PSIS/Ni achieved the highest degradation extent for rhodamine B among all the dyes.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Polymer Science
Mohammad Asad, Muhammad Nadeem Arshad, Abdullah M. Asiri, Mohammed M. Rahman, Snigdha Kumaran, Mohammed Musthafa Thorakkattil Neerankuzhiyil
Summary: Chitosan-bounded copper (chitosan-Cu) was utilized for the green synthesis of novel ferrocenated spiropyrrolidine hybrids. A one-pot three-component 1,3-dipolar cycloaddition reaction using tyrosine, glycine, and isatin derivatives was employed to form spiropyrrolidines from 1-(4-bromophenyl)-ferrocene-prop-2-en-1-one and azomethine ylides. The synthesized spiropyrrolidines showed good antibacterial activity against Gram-positive and Gram-negative bacterial strains.
Review
Polymer Science
Guravtar Singh Mann, Naved Azum, Anish Khan, Malik Abdul Rub, Md Imtaiyaz Hassan, Kisa Fatima, Abdullah M. Asiri
Summary: Global climate change has already caused various environmental effects and led to a shift in focus towards sustainable materials. Green composites, which combine renewable fibers with polymers, offer a wide range of applications and superior features compared to conventional materials.
Article
Chemistry, Physical
Rajesh Rajendiran, Ravi Balaga, Putrakumar Balla, Prem Kumar Seelam, Prathap Challa, Alagusundari Karuppiah, Vijayanand Perupogu, Venkatesan Rengarajan, Ulla Lassi, Esraa M. Bakhsh, Sher Bahadar Khan
Summary: Versatile heterogeneous nanocatalysts based on PdNPs decorated on metal oxides supports were designed and characterized. The catalysts showed high yields in the conversion of GVL to PA and the reduction of 4-NP to 4-AP. The relationship between the active sites and the catalytic performance was evaluated through various techniques. The thermodynamic parameters of the activation energy for the reduction reaction were calculated for different catalysts.
CATALYSIS COMMUNICATIONS
(2023)
Article
Environmental Sciences
Kalsoom Akhtar, Mohammad Sherjeel Javed Khan, Esraa M. Bakhsh, Tahseen Kamal, Abdullah M. Asiri, Sher Bahadar Khan
Summary: Metal nanoparticles were synthesized on a composite of Zn-phthalocyanine and chitosan hydrogel, acting as a catalyst support, to enhance the recovery and re-use of the catalyst. Various metal nanoparticles were deposited on the surface and inside the hydrogel. Co-0@ZnPc-CH and ZnPc-CH showed effective catalytic reduction and hydrogen generation.
ENVIRONMENTAL POLLUTION
(2023)
Article
Polymer Science
Esraa M. Bakhsh, Sher Bahadar Khan, Nujud Maslamani, Ekram Y. Danish, Kalsoom Akhtar, Abdullah M. Asiri
Summary: In this study, CMC/CuO-TiO2 beads were developed as a catalyst for the reduction of organic and inorganic contaminants. These beads demonstrated excellent catalytic activity and stability.
Article
Materials Science, Multidisciplinary
H. Mohit, Sanjay Mavinkere Rangappa, Krittirash Yorseng, Suchart Siengchin, Hadi M. Marwani, Anish Khan, Abdullah M. Asiri
Summary: The effect of chemically treated and untreated water hyacinth/pineapple leaf, titanium carbide nanoparticles, Innegra, and carbon fabric reinforcement on the characteristics of polyester hybrid composites was studied. The chemically treated fibers showed excellent bonding with the fillers and textiles, as observed from various analysis techniques. The use of artificial neural network (ANN) for modeling the material characteristics was also investigated in this study.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Farhana Anjum, Mohamed Shaban, Muhammad Ismail, Saima Gul, Esraa M. Bakhsh, Murad Ali Khan, Uzma Sharafat, Sher Bahadar Khan, M. I. Khan
Summary: In this study, CuO, GO, and CuO/GO nanocomposites were synthesized successfully, with CuO:GO(5:1) achieving the highest photocatalytic degradation efficiency of MR dye. The thermodynamic parameters indicated that CuO/GO(5:1) nanocomposites can efficiently degrade organic pollutants at room temperature.
Article
Multidisciplinary Sciences
Abdullah M. Asiri, Muhammad Khuram Shahzad, Shoukat Hussain, Kai Zhu, Sher Bahadar Khan, Khalid Ahmad Alamry, Soliman Y. Alfifi, Hadi M. Marwani
Summary: Energy conversion is essential for meeting energy production and consumption needs in the modern era. XGaO3 (X = Ba and Cs) compounds, with their electrical, optical, mechanical, and structural properties, were studied using density functional theory. The compounds showed a cubic pm3m structure with an associated space group. CsGaO3 and BaGaO3 exhibited both direct and indirect band gaps, and the localization of electrons in various bands was analyzed. The optical properties were explored through theoretical dielectric function scales, indicating the potential application of these compounds in light consumption and water splitting.
Article
Physics, Applied
Aftab Aslam Parwaz Khan, Z. Fadil, Pankaj Raizada, Pardeep Singh, Maha Alotaibi, Mohammad Omaish Ansari, Anish Khan, Abdullah M. Asiri, Chaitany Jayprakash Raorane
Summary: A monolayer anthracene-like nanostructure was studied through Monte Carlo simulations to determine its compensation temperature and magnetic hysteresis cycle. The effects of exchange coupling on compensation and transition temperatures were discussed. The study also investigated the magnetic hysteresis cycles and surface of multi-loop hysteresis with respect to strong exchange coupling and temperature parameters. This research has significant implications for multi-state memories and nanotechnology.
Review
Chemistry, Multidisciplinary
Umer Shahzad, Hadi M. Marwani, Mohsin Saeed, Abdullah M. Asiri, Mohammed M. Rahman
Summary: Due to their unique two-dimensional layered microstructure, MXenes are considered promising candidates for addressing energy and environmental issues, thanks to their numerous functionalities on the surface and excellent electrical, thermal, and optical features. Altering the dimensions, structure, surface chemistry, and chemical composition of MXenes can enhance their energy conversion and storage capabilities. Therefore, it is crucial to understand the relationship between structure and property from an applied perspective. This study reviews the synthesis, properties, and potential applications of MXenes and discusses their structural, chemical, optical, mechanical, and thermal properties, as well as their applications in photocatalysis, gas sensing, supercapacitors, electrocatalysis, and environmental remediation. It also highlights the progress and future prospects of MXene-based composites, providing valuable insights for scientists in academia and material sciences.
Article
Polymer Science
Khasan S. Karimov, Muhammad Tariq Saeed Chani, Noshin Fatima, Abdullah M. Asiri, Mohammed M. Rahman
Summary: Optimized surface-type impedimetric and capacitive proximity sensors have been fabricated on paper substrates using rubbing-in technology. These sensors can detect objects by sensing changes in impedance and/or capacitance when the object approaches, and they can be widely used in various fields due to their low cost, easy fabrication, and environmentally friendly materials.
Review
Chemistry, Multidisciplinary
Hafsah A. Klfout, Abdullah M. Asiri, Khalid A. Alamry, Mahmoud A. Hussein
Summary: Polybenzoxazine (PBz) is an excellent resin with diverse applications. The peculiar properties of benzoxazines have attracted the attention of researchers worldwide. However, petroleum-based benzoxazines are facing environmental concerns, leading to the research and development of bio-based alternatives. Bio-based polybenzoxazine, epoxy, and polysiloxane-based resins have gained interest in recent years due to their anticorrosion, eco-friendly, affordable, and low water absorption properties. This review provides an overview of polybenzoxazine, focusing on the advances in synthesizing bio-based polybenzoxazine, their properties, and their use in coating applications.
