Article
Chemistry, Inorganic & Nuclear
Ignacio Chamorro-Mena, Noemi Linares, Javier Garcia-Martinez
Summary: This study describes the optimization of Cu2O/CuO heterostructures for enhanced (photo)catalytic performance. The evaluation of catalysts with different Cu2O/CuO molar ratios revealed that a ratio of 0.15 resulted in significantly higher rate constants under blue-LED light. Furthermore, this photocatalyst exhibited good stability and excellent chemoselectivity in the presence of other functionalities.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ignacio Chamorro-Mena, Noemi Linares, Javier Garcia-Martinez
Summary: This study explores the optimization of Cu2O/CuO heterostructures for enhancing their (photo)catalytic performance. By evaluating catalysts with different Cu2O/CuO molar ratios, the researchers found that a ratio of 0.15 resulted in significantly higher reaction rate constants under blue LED light compared to lower (0.01) or higher (0.42) ratios. The photocatalyst also demonstrated good stability (>70% after 5 cycles) and excellent chemoselectivity in the selective reduction of the nitro group in the presence of other functionalities, such as -COOH, -CONH2, and -OH.
DALTON TRANSACTIONS
(2023)
Article
Multidisciplinary Sciences
Qiqi Mao, Xu Mu, Wenxin Wang, Kai Deng, Hongjie Yu, Ziqiang Wang, You Xu, Liang Wang, Hongjing Wang
Summary: In this study, a Cu single-atom dispersed Rh metallene catalyst was developed for cathodic nitrobenzene electroreduction reaction and anodic methanol oxidation reaction. The results showed that this catalyst could efficiently catalyze the reactions at low voltages, achieving the synthesis of high-value chemicals.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Shaoyang Feng, Congcong Zhao, Tingting Zhao, Yu Tian, Likai Yan
Summary: In this study, the reaction mechanism of B-doped graphdiyne with aniline electrocatalytic reduction was investigated, and it was found that B doping can improve the performance of catalysts and advance the development of metal-free electrocatalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Trissa Saha, Mashrafi Bin Mobarak, Md Najem Uddin, Md Saiful Quddus, Mustafizur Rahman Naim, Nigar Sultana Pinky
Summary: In this study, copper (II) oxide nanoparticles (CuO NPs) were synthesized using Averrhoa carambola leaf extract for the first time, in order to meet the demand for green synthesis. The synthesized CuO NPs were characterized using various techniques, including XRD, XPS, FESEM, FTIR, DLS, zeta potential, and UV-Vis spectroscopy. The results showed that the CuO NPs had a monoclinic crystalline phase with a crystallite size of 24.84 nm. The NPs exhibited antibacterial activity against gram positive and gram negative bacteria, with Salmonella typhi and Escherichia coli being the most susceptible strains.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Crystallography
Sameerah Al-Saeedi, Ghadah M. Al-Senani, Omar H. Abd-Elkader, Nasrallah M. Deraz
Summary: The study synthesized a series of copper-based systems containing two different nanocomposites (Cu2O/CuO and Cu2O/Cu) using the egg white assisted auto-combustion route. Characterization of the nanocomposites was carried out using various techniques, showing the presence of CuO, Cu2O, and Cu phases. Changes in oxygen vacancies at the surface or interface of the nanoparticles led to variations in their magnetization, indicating the potential for fabrication of different transition metal composites.
Article
Chemistry, Multidisciplinary
Kazuya Imamura, Kazuma Ikeuchi, Yuki Sakamoto, Yushiro Aono, Takahiro Oto, Ayumu Onda
Summary: The TiO2 photocatalyst can quantitatively convert nitrobenzene to aniline without the use of hydrogen gas when used with various saccharides. However, the use of disaccharides such as lactose, maltose, and sucrose reduces the reaction rate. The rate of photocatalytic hydrogenation of nitrobenzene with saccharides is determined by the degradation rate of saccharides at positive holes. When glucose is used, products such as formic acid, arabinose, glyceraldehyde, and lactic acid are obtained, which are consistent with the products of the photocatalytic oxidation of glucose.
Article
Environmental Sciences
Niloy Sarkar, Radhey Shyam Sharma, Mahima Kaushik
Summary: Nanopriming is a new science that uses nanoparticles to enhance seed vigor, and this study successfully synthesized environmentally-friendly nanoparticles and tested their effects on seeds, showing increased seed imbibition potential and germination promotion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Sourav Kumar Kajli, Debdutta Ray, Somnath C. Roy
Summary: One-dimensional nanostructures such as nanowires exhibit enhanced photoresponse compared to bulk materials due to unidirectional transport reducing recombination and scattering of charge carriers. CuO and Cu2O are promising transition metal oxides for efficient UV and visible light detection, forming type-II heterojunction for charge separation. Core-shell CuO/Cu2O nanowires show superior performance in terms of responsivity and detectivity, attributed to the Ohmic junction at Pd-Cu2O interface and type II heterojunction at CuO/Cu2O interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Hyunjin Jeong, Hyukhyun Ryu, Jong-Seong Bae
Summary: BiVO4/CuO heterojunction photoelectrodes were fabricated by depositing BiVO4 capping layers on CuO photoelectrodes, and it was found that proper deposition of BiVO4 can improve the photostability of the photoelectrode, achieving a high photostability of 76.2% by suppressing photocorrosion. However, the photocurrent density of the photoelectrode is still low, indicating the need for further improvement.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Energy & Fuels
Jiashi Wang, Ce Du, Qinhong Wei, Wenzhong Shen
Summary: Two-dimensional metallic Pd nanosheets were synthesized via an ion-exchange method and exhibited higher catalytic activity compared to Pd nanoparticles in catalytic reactions.
Article
Engineering, Environmental
Jiangyong Liu, Rongfei Ye, Jie Shi, Haiyang Wang, Lixia Wang, Panming Jian, Dan Wang
Summary: The study presents a novel approach for the preparation of a Cu nanoparticles embedded nitrogen-doped carbon catalyst using cushaw and Cu salt, which shows promising catalytic performance in the liquid-phase reduction of nitrobenzene. Experimental and computational findings indicate the strong interaction between Cu nanoparticles and carbon layer, facilitating the adsorption and activation of NB molecules.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Ravi Kumar, Kuldeep Kumar, Saurabh Sharma, Nikesh Thakur, Naveen Thakur
Summary: Bimetallic CuO/Cu2O-ZnO nanocomposites were synthesized using Ipomoea carnea leaf extract and microwave heating. The synthesized samples were characterized using spectroscopic techniques, confirming crystallinity and providing size estimates. The nanocomposites exhibited different shapes and sizes, and their stability, elemental composition, and organic composition were confirmed. Antibacterial activity against human pathogens and high photocatalytic degradation efficiency for dyes were demonstrated. The nanocomposites also showed antioxidant activity, with the 60:40 composition exhibiting the highest activity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Hossein Khoshsang, Khadijeh Abbasi, Ali Ghaffarinejad
Summary: A simple and environmentally friendly method for synthesizing CuO and ZnO nanoparticles using sunflower petal extract was presented. The optimal conditions for CuO and ZnO nanoparticle synthesis were determined by evaluating the concentration of the petal extract, amount of petals used, and synthesis temperature. Characterization of the nanoparticles was conducted using various techniques, and it was found that CuO nanoparticles were spherical with a size less than 50 nm, while ZnO nanoparticles had a similar morphology with a particle size less than 20 nm. The XRD patterns indicated monoclinic and hexagonal crystal structures for CuO and ZnO nanoparticles, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Elena Glazkova, Olga Bakina, Nikolay Rodkevich, Andrey Mosunov, Maxim Evstigneev, Vladislav Evstigneev, Viktor Klimenko, Marat Lerner
Summary: In this study, a composite thin coating was prepared by incorporating CuFe2O4/Cu2O/CuO nanoparticles into a PMMA matrix. The nanoparticles were evenly distributed in the composite coatings, but agglomeration occurred as the powder concentration increased. The thermal stability of the coating was not affected by the introduction of nanoparticles. The inclusion of nanoparticles significantly enhanced the antibacterial activity of the PMMA matrix.
Article
Materials Science, Multidisciplinary
Meshal Alzaid, Rakan Alanazi, Ibrahim Hotan Alsohaimi, W. S. Mohamed, N. M. A. Hadia, Mohammed Ezzeldien, Muhammad Zahir Iqbal
Summary: In this study, bimetallic sulfide was synthesized via hydrothermal technique and its performance was optimized. Ni0.50Mn0.50S showed the best performance for supercapattery application. A hybrid device of NiMnS//Activated carbon delivered a decent energy density of 45.7 Wh/kg and power density of 1700 W/kg, with exceptional cycling stability.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Muhammad Arif Ullah, Munirah Sulaiman Othman Alhar, Afaq Ullah Khan, Kamran Tahir, Magdi E. A. Zaki, Eman A. Alabbad, Ebraheem Abdu Musad Saleh, Hassan M. A. Hassan, Adel A. El-Zahhar, Alaa M. Munshi
Summary: In this study, Ag/SnO2/Nb2O5-SiO2 nanocomposites were successfully synthesized by a new green hydrothermal protocol, and their reaction completion, optimized conditions, composition, morphology, geometry, and average size were characterized using various techniques. The nanocomposites exhibited excellent photocatalytic activity, with 99% degradation of alizarin red dye achieved within 20 minutes. Furthermore, the synthesized material showed high efficiency in inhibiting the growth of Bacillus subtilis and Escherichia coli, and the combination of light and nanomaterial enhanced the production of reactive oxygen species, thereby improving the photocatalytic activity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Moamen S. Refat, Mohamed Y. El-Sayed, Ibrahim H. Alsohaimi, Hassan M. Hassan, Thamer S. Alraddadid, Sultan Akhtar
Summary: Nickel and cadmium sulfides are promising chemical materials with potential applications in various advanced research areas, including solar cells, supercapacitors, and catalysts. They also show significant interest for practical implementations in fields such as photonics and electronics.
BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
(2023)
Article
Biochemistry & Molecular Biology
Reda F. M. Elshaarawy, Hamad H. Abdel Gawad, Hassan M. A. Hassan, Reda M. Abd Alaal, Eman M. Hassan, Rana O. Yahya, Lamia A. Ismail
Summary: A new chelating ionic liquid (LSOH) and its metal complex (VO(LSO)(2)) were synthesized and characterized. The catalytic activity of VO(LSO)(2) in alkene epoxidation reactions was studied, and it was found to efficiently convert cyclic alkenes to their corresponding epoxides under optimal conditions.
CHEMISTRY & BIODIVERSITY
(2023)
Article
Biochemistry & Molecular Biology
Hassan M. A. Hassan, Ibrahim H. Alsohaimi, Amr A. Essawy, Mohamed R. El-Aassar, Mohamed A. Betiha, Alhulw H. Alshammari, Shaimaa K. Mohamed
Summary: Tailoring high-efficiency photocatalytic composites is crucial. Incorporating Zn (II) ions into TNTs can enhance their absorption of visible light and improve the photocatalytic performance. The Zn-TNTs composite shows significant degradation of RhB under visible light illumination, with a degradation rate of around 95% achieved in 120 minutes. The efficient engagement of photoexcited electrons over photogenerated holes in the photodegradation mechanism is observed.
Article
Polymer Science
Ibrahim Hotan Alsohaimi, Mosaed S. Alhumaimess, Hassan M. A. Hassan, Mohamed Reda, Abdullah M. Aldawsari, Qiao Chen, Mohammed Abdo Kariri
Summary: A simple approach for synthesizing a highly adsorbent composite for the uptake and elimination of heavy metal ions from wastewater was described. The composite, synthesized via grafting of chitosan on activated carbon surface followed by stacking with montmorillonite clay, showed a maximum adsorption capacity of 50 mg/g for Pb2+ ions.
Article
Chemistry, Multidisciplinary
Mosaed S. Alhumaimess, Obaid F. Aldosari, Almaha N. Alqhobisi, Laila M. Alhaidari, Afnan Altwala, Linah A. Alzarea, Hassan M. A. Hassan
Summary: This study developed NiCr LDH, Ag@NiCr LDH, and Pd@NiCr LDH bifunction catalysts, and analyzed their structures and morphologies using various techniques. The catalytic effectiveness of these catalysts was evaluated for CO oxidation and nitrobenzene reduction. Pd@NiCr LDH showed superior catalytic activity in both reactions, indicating the importance of the Ni2+@ Cr3+/Cr6+ @Pd degrees ion pairs as charge transfer centers. This research provides a novel NiCr LDH catalyst for air depollution control and organic transformation.
Article
Engineering, Chemical
Ibrahim Hotan Alsohaimi, Mosaed S. Alhumaimess, Ayoub Abdullah Alqadami, Hassan M. A. Hassan, Qiao Chen, Mohammed Saeed Alamri, Majed Mohammed J. Alanzi, Thamer S. Alraddadi
Summary: A novel magnetic nanohybrid, MGO@TETA@MACS, was successfully fabricated via an in situ coprecipitation method and used for the adsorption of methylene blue from liquid phase environment. The MGO@TETA@MACS nanocomposite was characterized by XRD, FTIR, TGA, nitrogen isotherm, SEM, and Zeta potential experiments. The adsorption kinetics followed the PFO model, while the adsorption equilibrium conformed to the Langmuir isotherm. The maximum adsorption capacity of MGO@TETA@MACS was 247.37 mg/g at the ambient temperature, and thermodynamic calculations confirmed the exothermic and spontaneous nature of MB decontamination.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Environmental Sciences
Almaha N. Alqhobisi, Mosaed S. Alhumaimess, Ibrahim Hotan Alsohaimi, Hassan M. A. Hassan, Amr A. Essawy, M. R. El-Aassar, Haitham Kalil
Summary: In this study, Pd-Cu nanoparticles immobilized on a Noria-GO nanocomposite were synthesized via a facile approach for efficient nitrophenol reduction. The unique architecture of Noria and the hydrophilic nature of GO contributed to the improved performance and structure of the resulting nanocomposite. The prepared Pd-Cu@Noria-GO nanocomposite exhibited superior catalytic efficacy with large conversion percentages, Kapp, and KAF values of 95%, 0.225 min-1, and 225 min-1g-1, respectively. It was also demonstrated that Pd-Cu@Noria-GO nanocomposite can be a promising material for remediating organic contaminants.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Hassan M. A. Hassan, Ibrahim Hotan Alsohaimi, M. R. El-Aassar, Mohammed A. El-Hashemy, Mohamed Y. El-Sayed, N. F. Alotaibi, Mohamed A. Betiha, Mohammed Alsuhybani, Raghad Ayed Alenazi
Summary: Electrospun TiO2-graphene oxide nanofibers exhibit improved mechanical properties and have potential applications in water remediation and organic transformation reactions.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Rasha M. K. Mohamed, Sabrein H. Mohamed, Aml M. Asran, Ibrahim H. Alsohaimi, Hassan M. A. Hassan, Hossieny Ibrahim, Mohamed M. El-Wekil
Summary: A novel electrochemical sensing platform based on gold nanoparticles anchored conductive carbon black modified graphite nanopowder flakes paste electrode was developed for the detection of Favipiravir (FVP). The sensor exhibited excellent sensitivity, stability, and anti-interference capability, allowing simultaneous detection of FVP and co-administered drug paracetamol (PCT). The detection limits for FVP and PCT were 7.5 nM and 4.3 nM, respectively. The sensor was successfully applied for simultaneous detection of FVP and PCT in spiked human plasma and pharmaceutical preparations, as well as in the presence of ascorbic acid in a real sample.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Amr A. Essawy, Khaled F. El-Massry, Ibrahim Hotan Alsohaimi, A. El-Ghorab
Summary: This research addresses the specific trapping of hydroxyl radicals and the efficacy of encapsulating natural antioxidants. A novel photoluminescent system is used to evaluate the scavenging potentiality of hydroxyl radicals in date seed oil (DSO). It is demonstrated that encapsulation improves the preservation activity of natural antioxidants, even after five months of extraction, compared to synthetic antioxidants. The developed fluorimetric probing technique upgrades antioxidant medicines and provides insights on mechanistic hydroxyl radical-damaging biology.
Article
Chemistry, Physical
Obaid F. Aldosari, Mosaed S. Alhumaimess, Mohamed A. Betiha, Emad A. Ahmed, Laila M. Alhaidari, Afnan Altwala, Hassan M. A. Hassan
Summary: This study fabricated a set of aluminum ion-grafted SBA-15 catalysts and examined the impact of the fabrication environment on their physicochemical characteristics. The findings revealed that the mesostructured SBA-15 remained intact after the successful inclusion of Al3+ ions, and the existence of both Bronsted and Lewis acid centers was enhanced. The Al-SBA-15(T-120) catalyst exhibited excellent catalytic performance in the esterification reaction.
Article
Chemistry, Multidisciplinary
Meshal Alzaid, Muhammad Zahir Iqbal, Bandar Alqahtani, Rakan Alanazi, Ibrahim Hotan Alsohaimi, W. S. Mohamed, N. M. A. Hadia
Summary: The layered structures of tungsten disulfide (WS2) and molybdenum tungsten disulfide (MoWS2) are considered as promising electrode materials for energy storage devices. By depositing WS2 and MoWS2 on the current collector using magnetron sputtering (MS), an optimized layer thickness can be achieved. The electrochemical investigations using cyclic voltammetry (CV), galvanostatic charging discharging (GCD), and electro-impedance spectroscopy (EIS) techniques revealed that WS2 with optimized thickness performed the best. A hybrid supercapacitor WS2//AC showed excellent cyclic stability, energy density, and power density, making it suitable for future energy storage applications.
Article
Chemistry, Physical
Yuanxing Fang, Ronan Hodgson, Wei Cheat Lee, Huyen Le, Hon Wing Boaz Chan, Hassan M. Hassan, Ibrahim H. Alsohaimi, Giacomo E. Canciani, Rong Qian, Qiao Chen
Summary: Photocatalytic water splitting has gained increasing attention as a green fuel source. In this study, TiO2 hollow hemisphere-based films were created and used for photoelectrochemical water splitting. The unique morphology and porous structure of the TiO2 hollow hemispheres improved the PEC performance by reducing charge recombination and enhancing light absorption.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)