Article
Chemistry, Multidisciplinary
Jyotindra Nath Mirdda, Subhadipta Mukhopadhyay, Kriti Ranjan Sahu, Makhanlal Nanda Goswami
Summary: Samarium doped Na2O-ZnO-TeO2 (NZT) glasses were prepared and their glass forming ability, stability, and optical properties were investigated. The results revealed that the doping of samarium reduced the optical band gap of the glass and led to visible light emission. The dielectric constant of the glass showed minimal variation with doping concentration, while the temperature-dependent dc conductivity followed an Arrhenius type mechanism.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Gulzar Ahmad Lone, Mohd Ikram
Summary: This study investigates the structural and dielectric properties of pristine and Ni-doped spinel CoFe2O4. The samples were synthesized using a solid-state reaction approach, and the structural analysis confirmed a single-phase FCC cubic spinel structure. The cationic distribution revealed changes in occupancy due to doping. SEM and EDS were used for microstructural and elemental composition analysis. The study found the presence of orientational and interfacial polarization in the samples. The dielectric constant showed a temperature-dependent behavior, with an increase observed after reaching a certain temperature. CoFe1.9Ni0.9O4 exhibited low dielectric loss and strong relaxation behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
S. T. Hameed, Talal F. Qahtan, A. M. Abdelghany, A. H. Oraby
Summary: Zinc oxide nanoparticles with sizes 20-80 nm were successfully prepared using the Sol-Gel technique and loaded onto a polymer blend, resulting in a notable decrease in bandgap, increase in refractive index, and enhancement in conductivity and dielectric parameters. The optimum ZnO NPs content for solid-state supercapacitors was found to be 2 wt%.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Inorganic & Nuclear
S. Yonatan Mulushoa, N. Murali, Paulos Taddesse, A. Ramakrishna, D. Parajuli, Khalid Mujasam Batoo, Ritesh Verma, Rajesh Kumar, Y. B. Shankar Rao, Sajjad Hussain, K. Samatha
Summary: In this paper, the structural, dielectric, and magnetic properties of Ni-Cr substituted MgFe2O4 ferrite material synthesized via a solid-state process were investigated. The results showed that the samples exhibited a single-phase cubic spinel structure with small crystallite sizes. The material had good magnetic saturation and coercivity, as well as a decreasing dielectric constant and loss tangent with increasing applied field frequency.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Biochemical Research Methods
Helen Merina Albert, R. Priya, Bajirao Bhila Ahire, N. S. M. P. Latha Devi, J. Madhuri Sailaja, S. Raziya Tabassum, Nellore Manoj Kumar, C. Alosious Gonsago
Summary: The advancement of crystalline growth and characterization tools has enabled the investigation of novel nonlinear optical substances suitable for photonic applications. In this study, a metal-organic crystal, B4AZA, was successfully produced and characterized using various analytical techniques. The experimental results demonstrate that B4AZA crystals exhibit wide transparency, minimal absorbance, and a large Stokes shift, making them suitable for photonic applications.
JOURNAL OF FLUORESCENCE
(2023)
Article
Materials Science, Ceramics
Chetna C. Chauhan, Abhishek A. Gor, Tanuj Gupta, Martin F. Desimone, Neha Patni, Rajshree B. Jotania
Summary: M-type calcium hexaferrite (CaM) was synthesized using extracts from Azadirachta indica and Murraya koenigii leaves, and the presence of phytochemicals in the extracts was found to significantly influence the properties of CaM hexaferrites. The study provides insights into the structural, optical, magnetic, and dielectric characteristics of CaM hexaferrites synthesized via a greener route.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
L. Anandaraj, L. Jothi
Summary: Ammonium Pentaborate Hexahydrate (APBHH), a novel inorganic nonlinear optical single crystal with a monoclinic structure, transparent with an optical bandgap of 5.56 eV, has been investigated for its crystal structure and optical properties using FT-IR, UV-Vis, and X-ray diffraction analysis.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Crystallography
Nada Al Taisan, Shalendra Kumar, Adil Alshoaibi
Summary: In this paper, the synthesis and characterization of pure and TM (Mn, Cr) doped BiFeO3 nanoparticles using the sol-gel technique were reported. The nanoparticle structure presented a rhombohedral distorted perovskite structure with R3c space group, along with a minor phase of Bi2Fe4O9. TM doping resulted in a decrease in lattice parameters and particle size. The bandgap was found to decrease with TM doping, while the dielectric constant and ac conductivity increased.
Article
Chemistry, Multidisciplinary
Lan Anh Thi Nguyen, Bay Van Mai, Din Van Nguyen, Ngoc Quyen Thi Nguyen, Vuong Van Pham, Thong Le Minh Pham, Hai Tu Le
Summary: This article presents a simple, eco-friendly, and green method for synthesizing silver nanoparticles (AgNPs) using an aqueous extract of Callisia fragrans leaf. The effects of extraction conditions were evaluated and parameters such as volume, pH, temperature, and reaction time were optimized. The synthesized AgNPs exhibited anticancer activity against various cell lines, making them potential candidates for anticancer agents.
GREEN PROCESSING AND SYNTHESIS
(2023)
Article
Crystallography
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Osama Saber
Summary: Bio-inspired synthesis of CeO2 nanoparticles using egg white showed promising antibacterial properties against Escherichia coli and Staphylococcus aureus. The nanoparticles exhibited different levels of antibacterial activity against the two bacteria, with a stronger inhibition effect observed against S. aureus compared to E. coli.
Article
Crystallography
Shalendra Kumar, Suliman Yousef AlOmar, Kavita Kumari, Fadwa Albalawi, Rajesh Kumar, Faheem Ahmed, Naushad Ahmad, Sourabh Dwivedi, Parvez Ahmad Alvi
Summary: This study reports the synthesis and characterization of Ce1-xFexO2-delta (0 ≤ x ≤ 20) nanoparticles using a microwave-assisted hydrothermal method, showing that Fe-doping can alter the crystal structure and optical properties of CeO2 nanoparticles, and exhibit certain antibacterial activity against different bacteria under ambient conditions.
Article
Spectroscopy
Xujing Yuan, Linlin Ge, Haichun Zhou, Junqi Tang
Summary: Gold nanostructures, particularly isotropic spherical gold nanoparticles (AuNPs), have been extensively studied for their catalytic activity in heterogeneous catalytic processes. In this study, the influence of size, composition, and surface capping agents on the catalytic activity of AuNPs in reduction reactions was investigated. The results showed that the catalytic activity of AuNPs decreases with increasing size, while the presence of anisotropic AuNPs did not significantly affect the catalytic activity of AuNPs with tartrate as the reducing agent. Additionally, silver was found to enhance both the monodispersity and catalytic activity of small AuNPs. Overall, this study provides valuable insights into the factors that influence the catalytic activity of AuNPs and expands the potential applications of gold-based catalysts and AuNPs in various fields.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Man Li, Xiping Zhu, Jiaman Peng, Shaohui Zheng
Summary: This article utilizes density functional theory (DFT) and time-dependent density functional theory (TDDFT) to study a series of quinquethiophene compounds functionalized with S,S-dioxide and side alkyl chains. It successfully reproduces the experimental UV-Vis absorption and fluorescence emission spectra and provides insight into the effects of sulfur di-oxidation and side chain engineering on the absorption and fluorescence of oligothiophene.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Chemistry, Physical
L. Anandaraj, L. Jothi
Summary: Cadmium chloride monohydrate doped sulphamic acid crystals were successfully grown by slow evaporation method at room temperature, and their excellent properties were characterized through various analyses such as X-ray diffraction and dielectric response. The results indicate the importance of investigating the effect of doping concentration on sulphamic acid crystal.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Muhammad Danish Ali, Farzana Majid, Ammara Aslam, Abdul Malik, Iqra Wahid, Seemab Dildar, Salma Waseem, A. Dahshan
Summary: The study successfully prepared graphene ferrites through synthesis and doping methods, and analyzed its structure and electronic properties using XRD, UV-visible spectroscopy, etc., confirming the formation of PB and Fe3O4 nanoparticles in graphene. Electrical property investigations showed that the material exhibits good conductivity and dielectric properties.
CERAMICS INTERNATIONAL
(2021)
Review
Engineering, Chemical
Nam Nghiep Tran, Marc Escriba-Gelonch, Mohammad Mohsen Sarafraz, Quoc Hue Pho, Suresh Sagadevan, Volker Hessel
Summary: Removal of heavy metals in wastewater treatment is crucial. Various techniques have been developed for the removal of heavy metal ions, pharmaceuticals, and other contaminants. This paper comprehensively assesses the sustainability of common wastewater treatment technologies and aims for sustainability benchmarking of all technologies.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Is Fatimah, Putwi Widya Citradewi, Gani Purwiandono, Habibi Hidayat, Suresh Sagadevan
Summary: In this study, reduced graphene oxide/nickel oxide nanocomposites were synthesized using a green method and their photocatalytic activity was investigated. The results showed that the NiO/rGO composite exhibited excellent photocatalytic performance for tetracycline degradation under both UV and visible light illumination. Additionally, it also demonstrated antibacterial activity against Staphylococcus aureus and Eschericia coli.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Suresh Sagadevan, Solhe F. Alshahateet, J. Anita Lett, Is Fatimah, Ramesh Poonchi Sivasankaran, Assefu Kassegn Sibhatu, Estelle Leonard, Minh-Vien Le, Tetsuo Soga
Summary: Silver (I) oxide (Ag2O) nanoparticles (NPs) were synthesized by solution reduction. The Ag2O NPs were characterized using XRD, FTIR, SEM, DRS, and DLS techniques. The results showed the structure, shape, energy gap, and functional group variations of Ag2O NPs. The synthesized Ag2O NPs exhibited a mean hydrodynamic diameter of 171 +/- 82.8 nm in water. The photocatalytic activity of Ag2O NPs towards the degradation of Methylene blue (MB) dye under solar light was tested, and a maximum removal efficiency of 91.5% in 70 min was achieved. The photodegradation data followed pseudo-first-order kinetics with a rate constant of 0.0319 min(-1) and a half-life time of 21.72 min.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Durga Devi Suppiah, Nurhidayatullaili Muhd Julkapli, Suresh Sagadevan, Mohd Rafie Johan
Summary: Metal and metal oxide nanoparticles can be produced using natural extracts instead of chemicals. Plant extraction techniques have advantages for industrial production due to their simplicity and environmental friendliness. Phytochemicals play a significant role in the synthesis reactions and can act as capping, reducing, and stabilizing agents. This green synthesis route is cost-effective and does not require expensive or hazardous chemicals. The review paper explores different green iron oxide nanoparticles and their potential applications in photocatalysis and biological activities.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
P. Ramadevi, Ra. Shanmugavadivu, Ragavendran Venkatesan, Jeyanthinath Mayandi, Suresh Sagadevan
Summary: In this study, nickel ferrite and aluminum-doped nickel ferrite were synthesized using the hydrothermal method. The cubic ferrite structure with space group Fd3m was confirmed by XRD analysis. The functional groups of the nanoparticles were analyzed using FTIR and FT-Raman spectroscopy. FESEM and EDX mapping analyses were used to examine the morphology and elemental composition of the products. The prepared nanoparticles showed good photocatalytic activity against methyl blue and methyl orange under visible-light irradiation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Julia Izua Natasya Joaspizi, Nor Atilia Athira Zaahari, Suresh Sagadevan, Takaomi Kobayashi, Rohana Adnan, Saifullahi Shehu Imam, Mohd Amirul Ramlan
Summary: A photocatalyst composite film comprising cellulose acetate (CA)-supported bismuth ferrite (CA-BFO) was successfully fabricated using a phase-inversion technique. The composite showed high removal efficiency for a mixture of crystal violet (CV) and indigo carmine (IC) dyes under direct sunlight. The optimal pH for removing both types of dyes was found to be 6.0. A catalyst loading of 0.04 g/L of BiFeO3 distributed in the cellulose acetate membrane was able to degrade up to 100 ppm of mixed dyes and remained efficient over a wide pH range. The composite exhibited preferential adsorption to IC and higher photocatalytic affinity for CV, suggesting a synergistic mode of dye removal.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Environmental Sciences
B. Murugan, U. Mahalingam, P. Ramasamy, S. Sahadevan
Summary: This study presents a novel and simple approach using cadmium sulfide nanoparticles (CdS) as a coupler to detect, degrade, and remove plastic pollutants. Biomass-sourced activated carbon is used to improve the adhesion power of the CdSNPs@BBFCO/AC nanocomposites, which exhibit excellent adsorption and catalytic properties. The synthesized nanocomposites are able to detect and degrade various types of plastic samples, showing great potential for plastic pollutant detection, degradation, and removal processes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
S. Mahalakshmi, Jeyanthinath Mayandi, Suresh Sagadevan, V Ragavendran, K. Manikandan, S. Arumugam, J. M. Pearce, Vishnukanthan Venkatachalapathy
Summary: This study synthesizes barium titanate (BaTiO3) nanoparticles using a low-cost sol-gel hydrothermal method at different temperatures and investigates their second harmonic generation (SHG) effects. The crystal structure of BaTiO3 changes from simple cubic to rhombohedral, resulting in structural distortion and phase transition. The variation in particle size and magnetic properties leads to an improved SHG conversion efficiency. This technique shows promise for fabricating bio-compatible imaging probes and coherent bio-markers in medicine and electronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hasanudin Hasanudin, Wan Ryan Asri, Lepa Husnia, Zainal Fanani, Roni Maryana, Muhammad Al Muttaqii, Zongyuan Zhu, Suresh Sagadevan
Summary: This study investigated the use of nickel phosphide immobilized on natural bentonite as a low-cost catalyst for diisopropyl ether (DIPE) production. The catalyst was prepared using a simple wet-impregnation method, and its physicochemical features were analyzed using various techniques. The results showed that the NiP species enhanced the acidity and surface area properties of the bentonite without altering its structure. The use of the NiP/bentonite catalyst resulted in a DIPE product yield of 68.52% with high stability over three cycles.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Review
Engineering, Chemical
Is Fatimah, Ganjar Fadillah, Suresh Sagadevan, Won-Chun Oh, Keshav Lalit Ameta
Summary: The high demand for energy has led to the exploration of renewable resources, particularly biodiesel. Optimizing the production process of biodiesel is essential for it to become an eco-friendly and high-performance energy resource. The development of low-cost and reusable heterogeneous catalysts, such as mesoporous silica materials, has gained significant attention. This review provides updates on the modifications of mesoporous silica catalysts, including acidic, basic, enzyme, and bifunctional catalysts, and discusses future prospects.
Article
Physics, Applied
A. Perepeliuc, R. Gujrati, A. Srivastava, P. Vuong, V. Ottapilakkal, P. L. Voss, S. Sundaram, J. P. Salvestrini, A. Ougazzaden
Summary: Hexagonal boron nitride exhibits persistent photoconductivity after UV illumination, which is not affected by temperature or pressure. The effect can last for months at room temperature and even after heating up to 300°C. Increased conductivity of up to six orders of magnitude has been observed in the devices, with time constants up to 4600 days. Irradiation after saturation reduces the decay rate significantly. Magnesium-doped h-BN diodes have been used to determine the type of conductivity, with both n- and p-type durable photoinduced carriers observed depending on the wavelength of illumination. These findings are important for improving UVC LEDs.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Inorganic & Nuclear
Thavasilingam Nagendraraj, Sakthivel Vishnu Priya, Jamespandi Annaraj, Suresh Sagadevan
Summary: The primary biothiols, cysteine (Cys), glutathione (GSH), and homocysteine (Hcy), have crucial roles in various biological processes. Fluctuations in redox balance can lead to diseases due to disruptions in perfectly regulated intracellular and extracellular microenvironments. A study was conducted to develop copper-based fluorescence probes for detecting extracellular and intracellular targets such as cysteine (Cys) and glutathione (GSH) respectively. The fluorescence of the probes coordinated with Cu2+ is quenched by the binding of either Cys or GSH, resulting in retained Cu2+ ions.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Inorganic & Nuclear
V. Ramasamy, E. Thenpandiyan, G. Suresh, T. Sathishpriya, Suresh Sagadevan
Summary: The nano CaCO3 and Eu3+ doped CaCO3/PEG nanocomposites were prepared through the biomimetic method. The prepared products were characterized and the electrochemical performance was evaluated. The results showed that the Eu3+ doped CaCO3/PEG nanocomposite exhibited superior pseudocapacitive behavior and could be used as an electrode material for supercapacitor applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Suresh Sagadevan, Is Fatimah, Jayasingh Anita Lett, Md Zillur Rahman, Estelle Leonard, Won-Chun Oh
Summary: This review provides a comprehensive overview of the green fabrication of nickel oxide nanoparticles using extracts from various plant and microbial sources, and discusses their potential uses in biological applications.
Article
Chemistry, Inorganic & Nuclear
Is Fatimah, Amri Yahya, Gani Purwiandono, Suresh Sagadevan
Summary: In this study, a new type of nanocomposite W/Ti-PCH was successfully synthesized and characterized. XRD and XPS analysis confirmed the dispersion of WO3 on the Ti-PCH surface, resulting in an increased band gap energy of the material. The nanocomposite exhibited excellent photocatalytic degradation performance.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)