Article
Engineering, Electrical & Electronic
D. Ramki, M. Dharmendira Kumar, P. Siva Karthik
Summary: A series of 1D tin oxide (SnO2) anchored on the 2D-reduced graphene oxide (RGO) composites were synthesized. The microstructure, morphology, chemical composition, oxidation states and surface areas of the composites were studied. The SnO2@RGO nanohybrids exhibited enhanced UV and visible absorbance, as well as improved photocatalytic activity for the photoreduction of Cr(VI) compared to bare SnO2. The enhanced activity can be attributed to the electron transfer process and synergistic interaction between RGO and SnO2.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Xin Zhang, Xueyan Jia, Zihang Shi, Bolun Song, Yongan Niu
Summary: H-SnO2 microspheres with adjustable shell thickness were successfully synthesized using SiO2 microspheres as templates, showing great potential in various applications.
Article
Materials Science, Ceramics
S. V. Egorov, A. G. Eremeev, V. V. Kholoptsev, I. V. Plotnikov, K. I. Rybakov, A. A. Sorokin, S. S. Balabanov, E. Ye. Rostokina, Yu. V. Bykov
Summary: The study found that the addition of carbon nanotubes during microwave sintering of alumina had no significant impact on the development of thermal instability, but could increase the final density.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Shalu Gupta, Rakesh Kumar
Summary: This study presents the synthesis and characterization of rGO/SnO2 nanocomposites and their effectiveness in adsorption and photocatalytic degradation of organic contaminants. The incorporation of rGO into SnO2 nanostructures enhanced the adsorption and photocatalytic properties of the nanocomposites. An optimal weight ratio of 15% of rGO was identified for rapid degradation of organic contaminants under simulated sunlight irradiation.
Review
Environmental Sciences
Gomathi Ramalingam, Nagapandiselvi Perumal, A. K. Priya, Saravanan Rajendran
Summary: Water is essential for all living things, but industrialization has led to water contamination, affecting ecosystems. The lack of treatment in reusing wastewater is the root issue. Therefore, water treatment is crucial for preserving the ecosystem and human health. In recent years, graphene-based photocatalysts have gained attention for their exceptional properties in wastewater treatment.
Article
Nanoscience & Nanotechnology
Seyed Arman Banarouei, Luxia Yu, Cuiying Jian
Summary: The study conducted a series of indentation simulations using finite element method to investigate the mechanical properties of graphene/TiO2 and graphene/SnO2 nanocomposite films. The results showed that increasing the thicknesses of metal oxide layers can change the mechanical response of nanocomposites, while increasing the volume fraction of graphene can enhance the Young's modulus of the materials. Additionally, nuances in layer arrangements can also affect the reinforcement effects.
Article
Nanoscience & Nanotechnology
Kunihiko Kato, Yunzi Xin, Takashi Shirai, Sebastien Vaucher
Summary: A novel design has been proposed for a facile and rapid build-up of highly tailorable nanostructured multishells on metal oxide particles to maximize the visible-light photocatalytic performance. The composite materials showed better photocatalytic activity in comparison to the traditional synthesis pathway for degradation of organic pollutants under visible light, attributed to the synergetic effects of homo-/hetero-junction on TiO2.
SCRIPTA MATERIALIA
(2022)
Review
Biochemistry & Molecular Biology
Clare Davis-Wheeler Chin, LaRico J. Treadwell, John B. Wiley
Summary: The use of microwave irradiation for the synthesis of inorganic nanomaterials has become a widespread area of research, with a growing demand for materials tailored to specific applications. Microwave irradiation offers unique advantages by promoting homogeneous heat distribution, increased reaction rates, and greater control over the reaction environment. This method has shown promise in producing high-quality nanoscale composites with controlled size, morphology, and architecture.
Article
Chemistry, Multidisciplinary
Wenhao Chi, Zhaoyong Zou, Wenxuan Wang, Fuqiang Wan, Hang Ping, Jingjing Xie, Weimin Wang, Zhengyi Fu
Summary: Living organisms can serve as biosynthesis factories for environmentally friendly material fabrication, showing potential for extending synthesis methods. By taking inspiration from pearl formation, researchers have successfully directed the formation of nitrogen-doped anatase TiO2 and fabricated a SnO2/graphene oxide composite with improved lithium storage performance for lithium-ion batteries. This study highlights the possibility of synthesizing useful composite materials in living organisms, which could help reduce energy consumption and broaden synthesis techniques.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Pham Van Tuan, Hoang Ba Tuong, Vu Thi Tan, Luong Hoai Thu, Nguyen Duc Khoang, Tran Ngoc Khiem
Summary: SnO2/reduced graphene oxide (rGO) nanocomposites were prepared by one-step hydrothermal method and characterized by X-ray diffraction, scanning electron microscopy, Raman scattering spectroscopy, and UV-vis absorption spectra. The results showed that increasing rGO doping enhanced the photocatalytic properties of the nanocomposites, indicating the potential for environmental remediation applications.
Article
Chemistry, Multidisciplinary
Yu Zhou, Liwei Zhu, Yanjian Wang, Liangmin Yu, Xia Li
Summary: The study presents a simple strategy to prepare metal-organic framework@graphene oxide composite materials with excellent microwave absorption performance, demonstrating that the effective absorption of electromagnetic waves is achieved through various mechanisms such as conduction loss, dipole and interface polarization, and balanced impedance matching.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Qiwei Tang, Li Wang, Xiaoxuan Ma, Min Li
Summary: A rodlike SnO2/graphene nanocomposite with excellent cyclic and rate performance was successfully prepared, showing promising potential as an anode material for lithium-ion batteries. The unique structure of the composite effectively alleviates volume expansion and greatly improves cycling stability and rate capability.
Article
Materials Science, Composites
Mahima Dua, Qi Zhang, Pierre Mertiny
Summary: This study investigates the fabrication of multifunctional polylactide acid (PLA) composites with strong microwave absorption using graphene nanoplatelets (GNP). The composites were fabricated using a scalable manufacturing method and characterized for their properties. The efficacy of microwave heating in the composites was studied using thermal imaging and finite element software. The results show that the produced nanocomposites have strong microwave absorption characteristics and potential applications in fusion bonding for thermoplastic-based components.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Ceramics
Mohsin Ali Marwat, Habib Ullah, Muhammad Usman, Muhammad Ali Ehsan, Haibo Zhang, Muhammad Fawad Khan, Sher Ali, Muhammad Yousaf
Summary: This study utilized narrow/wide-bandgap heterojunction nanocomposites for efficient visible-light photodegradation of chlorinated compounds. By optimizing the coupling ratio of SnO2 and BiFeO3, the effective utilization of electrons and holes led to enhanced visible-light photodegradation performance.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
P. Lava Kumar, A. Lombardi, G. Byczynski, S. V. S. Narayana Murty, B. S. Murty, L. Bichler
Summary: This paper provides a comprehensive and critical review of the processing, properties, and applications of aluminium matrix composites reinforced with graphene-based nanomaterials. It highlights the challenges in processing, the micro-mechanical models used for quantifying the strengthening, and the potential applications in various industries. The paper also suggests future research directions.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Organic
Sagar D. Nale, Hari Datta Khanal, Yong Rok Lee
Summary: A palladium-catalyzed desulfitative coupling of quinoxalin-2(1H)-ones with arylsulfonyl chlorides is demonstrated. The reaction allows for the synthesis of C3-arylquinoxalin-2(1H)-ones. The method enables successful coupling of chloro- and fluoro-aryl sulfonyl chlorides with quinoxalin-2(1H)-ones without carbon-halogen bond cleavage.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Raju S. Thombal, Peter Yuosef M. Rubio, Daesung Lee, Debabrata Maiti, Yong Rok Lee
Summary: Metal catalyzed cascade C-H activation/annulation is a highly promising approach for the construction of aromatic and heteroaromatic compounds. Pd-complexes play a crucial role in this method, enabling high catalytic efficiency through the activation of molecules bearing a directing group.
Article
Chemistry, Applied
Mohammad Aslam, Shreedhar Devkota, Sana Jamshaid, Yong Rok Lee
Summary: A synthetic strategy for the installation of diversely functionalized quinones at the C4 position of indoles has been developed. This method provides a rapid and efficient route to a variety of 4-quinonylindoles and biologically interesting bis(indol-4-yl)quinones.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Eswaran Kamaraj, Yong Rok Lee, Kavitha Balasubramani
Summary: In this study, a new NiWO4/SnO2 p-n heterojunction photocatalyst was successfully synthesized for effective degradation of organic dye Amaranth. Characterization analyses revealed that the p-n heterojunction photocatalyst greatly enhance charge generation and suppress electron-hole recombination, leading to improved photocatalytic performance. The NiWO4/SnO2 photocatalyst showed the highest degradation efficiency of 93% for Amaranth after 180 min.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Hyo Seon Sim, Hari Datta Khanal, Yong Rok Lee
Summary: In this paper, a highly efficient and atom-economic iron(III)-catalyzed three-component heteroannulation reaction is described for the construction of multifunctionalized 2-pyridones. The protocol allows rapid access to a variety of 2-pyridones with an ortho-hydroxybenzoyl and a benzoyl scaffold under simple conditions. The synthetic utility of the synthesized 2-pyridone scaffolds is demonstrated by transforming them into biologically interesting complex heterocycles.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Ramaraj Sukanya, Sonaimuthu Mohandoss, Yong Rok Lee
Summary: This paper presents a one-pot hydrothermal synthesis method to prepare Mo-doped MnWO4 NCs for the electrochemical detection of NTZ. The introduction of defect engineering on metal tungstates shows promising potential in developing high-performance sensing materials for drug molecules.
Review
Environmental Sciences
Sourav Prusty, Prathap Somu, Jitendra Kumar Sahoo, Debasish Panda, Sunil Kumar Sahoo, Shraban Kumar Sahoo, Yong Rok Lee, T. Jarin, L. Syam Sundar, Koppula Srinivas Rao
Summary: Groundwater contamination, particularly the pollution caused by nuclear power plants and their by-products, is a significant concern. Adsorption has emerged as a simple, effective, and cost-efficient method for addressing this issue.
Article
Chemistry, Applied
Shreedhar Devkota, Muhammad Saeed Akhtar, Yong Rok Lee
Summary: This study explores the rhodium(III)-catalyzed sp(2)/sp(3) C-H activation/annulation of 2-arylquinazolin-4(3H)-ones with 3-methylmaleimides. Diversely functionalized isoindoloquinazolinones were obtained in good yields upon reaction with various maleimides. This Rh(III)-catalyzed protocol can be applied for the chemo- and diastereoselective synthesis of various polyheterocycles.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Le Nhu Minh Tue, Sumanta Sahoo, Ganesh Dhakal, Van Hoa Nguyen, Jintae Lee, Yong Rok Lee, Jae-Jin Shim
Summary: Metal sulfides (MS) and mixed metal sulfides (MTMS), such as NiCo2S4 and 2D MS MoS2, were synthesized through a solvothermal process and used as electrodes for supercapacitors. The resulting electrode showed excellent coulombic efficiency, high specific capacitance, superior energy density, and ultra-high cycling stability. The hybrid supercapacitor device also exhibited impressive coulombic efficiency and good cycling stability, as well as decent energy density over a large number of cycles.
Article
Chemistry, Applied
Perumal Muthuraja, Muhammad Saeed Akhtar, Purushothaman Gopinath, Yong Rok Lee
Summary: A substrate-controlled [4+1] annulation of sulfoxonium ylides with maleimides via Rh(III)-catalyzed C-H bond activation is developed, providing diversely functionalized indanonylpyrroline-2,5-dione derivatives and biologically intriguing spiroindanonylpyrroline-2,5-diones. This methodology offers a broad substrate scope, good functional group tolerance, and diastereoselectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Applied
Eswaran Kamaraj, Prasanta Roy, Yong Rok Lee
Summary: A rhodium-catalyzed [5+1] cycloaddition through C-H activation/O-annulation strategy is described for synthesizing biologically interesting isochromenes. This method selectively provides divergently functionalized isochromenes containing spirosuccinimide and maleimide scaffolds based on the maleimides and itaconimides used as substrates. It demonstrates a broad substrate scope, remarkable functional group tolerance, and high regioselectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Organic
Hari Datta Khanal, Karuna Mahato, Yong Rok Lee
Summary: An effective and unprecedented In(III)-catalyzed benzannulation of 3-formyl-4-pyrones with simple arylacetylenes is reported, which enables their conversion into structurally diverse salicylaldehyde-bearing ortho-terphenyl frameworks. This transformation is achieved via an In(III)-catalyzed C-O bond extrusion and proceeds without the requirement for an external oxidant. The synthetic utility of this protocol is demonstrated by the transformation of the obtained product into molecules with bisindole, chromene, and oxime moieties.
Article
Nanoscience & Nanotechnology
Le Hong Quan, Ung Thi Dieu Thuy, Pham Viet Nam, Nguyen Van Chi, Tang Xuan Duong, Nguyen Van Hoa
Summary: The valorization of shrimp wastes to develop advanced materials brings economic and environmental advantages. This paper presents a facile and eco-friendly synthesis of shrimp chitosan-derived carbon (CCS) and CSSN aerogel nanocomposite for supercapacitor application, in which NiO and Ni(OH)2 nanoparticles were tightly attached to the porous surface of CCS aerogel. The CCSN-300 aerogel material electrode exhibits high capacitance, excellent cycling stability, and high energy density, indicating great promise in energy storage.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Chemistry, Multidisciplinary
Esakkimuthu Shanmugasundaram, Vigneshkumar Ganesan, Vimalasruthi Narayanan, Kannan Vellaisamy, Rajaram Rajamohan, Yong Rok Lee, Selvam Kaliyamoorthy, Stalin Thambusamy
Summary: Carbon quantum dots (CQDs) have exceptional optical and electrical qualities, making them important for various applications. Heteroatom-doped CQDs, such as B-CQDs, N-CQDs, and F-CQDs, were synthesized and their bandgap characteristics, absorption patterns, and emission characteristics were examined. Photoactive films were created by electropolymerizing PANI into the CQDs, and their photophysical and electronic characteristics were analyzed. The PANI-N-CQD film showed great potential as a photoactive material for organic solar cell applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Organic
Hari Datta Khanal, Muthuraja Perumal, Yong Rok Lee
Summary: The reduction of the stable nitro group is a fundamental and widely used transformation for the construction of complex and functionalized heterocyclic architectures. The reactivity of the nitro group in the 2-nitrostyrene moiety not only triggers the formation of carbon-nitrogen bonds, but also offers the opportunity for annulation and heteroannulation, providing a cascade process for the synthesis of highly conjugated natural and unnatural molecules. This review comprehensively discusses the use of 2-nitrostyrene motifs in the synthesis of various N-heterocycles, highlighting their important features, reactivities, and mechanisms.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.
