Article
Materials Science, Multidisciplinary
Ravinder Kumar Chadha, Kanchan L. Singh, Chetan Sharma, Anirudh P. Singh, Vandana Naithani
Summary: The properties of different Sr-Zr-HAp.xZn(30-x)Si composites were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, hardness testing, and scanning electron microscopy. The composites sintered using microwave energy showed higher density and hardness values compared to conventionally sintered composites. The in vitro bioactivity of the samples was assessed by simulated body fluid immersion method, and the microstructural studies indicated the formation of apatite layer, demonstrating the bioactivity of the synthesized composites.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mohamed Ahmed, M. Afifi, Sherif Ashraf, Sahar A. Abdelbadie, Jonas Baltrusaitis
Summary: Metal oxide nanoparticles have broad applications in biomedicine due to their diverse functionality. In this study, cobalt oxide or cerium oxide was combined with hydroxyapatite and graphene oxide to form a ternary nanocomposite for potential use in bone replacement materials. The composite exhibited improved porosity, cell viability, and biodegradability.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
P. Rajapandi, G. Viruthagiri, Narmatha Shanmugam
Summary: The present study focuses on the synthesis and characterization of pure and Ni-doped alpha-Fe2O3 nanoparticles, as well as their structural, morphological, optical, magnetic, and antimicrobial properties. XRD analysis revealed the rhombohedral structure of the nanoparticles, with an average size of 39-47 nm. The addition of nickel resulted in a reduction in density dislocations, and UV-vis-DRS studies showed lower bandgap values for higher Ni-dopants. The nanoparticles displayed ferromagnetic behavior, as confirmed by VSM measurements. The antibacterial activity of the nanoparticles was assessed using the disc diffusion technique, which showed the highest inhibition zone against gram-positive bacteria at concentrations of 200 and 500 μg/ml.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Ceramics
Ibrahim A. Alsafari
Summary: In this study, bare copper oxide CuO nanoparticles, MXene nanosheets and their CuO/MXene nanocomposite were synthesized to enhance photocatalytic activity. The synthesized nanocomposite showed increased surface area and superior photocatalytic activity, attributed to the effective intercalation of nanoparticles between the MXene nanosheets.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Hassen Agougui, Nouha Sebeia, Mahjoub Jabli, Yassine El-Ghoul, Khaled Boughzala
Summary: This study successfully prepared an adsorbent CaHAp-MSi for the removal of methylene blue from aqueous solution by chemically modifying the surface of hydroxyapatite and characterized its physicochemical properties through various analytical techniques. Batch adsorption experiments demonstrated that the maximum adsorption capacity of (CaHAp-MSi)15 composite was significantly higher than that of unfunctionalized CaHAp, indicating that both physisorption and chemisorption processes may contribute to the adsorption process.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Biology
K. C. Vinoth Kumar, T. Jani Subha, K. G. Ahila, B. Ravindran, S. W. Chang, Ahmed Hossam Mahmoud, Osama B. Mohammed, M. A. Rathi
Summary: In this study, natural hydroxyapatite was extracted from different bone samples through thermal calcination process and compared for their crystalline nature, functional groups and morphological characteristics. The results showed that hydroxyapatite from waste bones of fighting cock had higher crystallinity and smaller grain size compared to Black Sumatra bones.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2021)
Article
Multidisciplinary Sciences
Hussein Ali Kadhim Kyhoiesh, Mohammed K. Al-Hussainawy, Azal Shakir Waheeb, Khalid J. Al-Adilee
Summary: The structure of the new heterocyclic azo ligand BIAB was studied using various spectral techniques, and its antibacterial and antifungal activities were tested, showing higher antibacterial and slight antifungal effects.
Article
Chemistry, Physical
A. El-Habib, M. Addou, A. Aouni, J. Zimou, M. Diani, H. Ftouhi, Z. El Jouad
Summary: This study examined the structural, optical, and electrochemical properties of undoped and vanadium (V) doped cerium dioxide (CeO2) thin films prepared by an automated spray pyrolysis technique. The results showed that V doping leads to a decrease in band gap value and average transmittance, while improving the Li+ ion insertion and extraction capability. The findings expand the potential applications of this material, especially in electrochromic devices.
SURFACES AND INTERFACES
(2021)
Article
Energy & Fuels
R. Rabecca, A. Doss, V. Mary Kensa, S. Iswarya, N. Mukeshbabu, R. P. Praveen Pole, K. Iyappan
Summary: This study successfully synthesized zinc oxide nanoparticles using water extracts from two different seaweed species and characterized their size and shape. The results showed that the shape of the zinc oxide nanoparticles differed depending on the seaweed extract used, and they exhibited strong antibacterial activity.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Materials Science, Multidisciplinary
M. Afshari, H. Eivaz Mohammadloo, A. A. Sarabi, Sh. Roshan
Summary: The eco-friendly hydroxyapatite-based coating modified by polyvinylalcohol (PVA) was found to provide effective corrosion protection for Mg AZ31 substrates, with the best performance achieved in a one-step process with a PVA concentration of 0.05 wt% and an immersion time of 60 min. The results also showed that prolonged treatment time led to increased irregularity in morphology.
Article
Materials Science, Ceramics
M. Narasimha Murthy, V. Ganesh, G. Ravinder, S. Anusha, G. Chandrakala, C. J. Sreelatha
Summary: Aluminum and rubidium-doped zinc oxide thin films were deposited on glass substrates using sol-gel dip coating method. The effect of dopant content on structural, surface morphological, vibrational, and optical properties was studied using X-ray diffraction, SEM-AFM, and Raman spectrometer. It was observed that introducing Rb impurities into the ZnO lattice resulted in a deterioration in crystal quality and a blue shift in the bandgap. The increase in dopant concentration led to a change from hydrophilic to hydrophobic nature and showed significant antibacterial activity against E. coli.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mahmood Sharifitabar, Samira Khorshahian, Mahdi Shafiee Afarani, Pravin Kumar, Neelesh Kumar Jain
Summary: The high-temperature oxidation behavior of Inconel 625 superalloy manufactured by the wire arc additive manufacturing (WAAM) technique was investigated. The results showed the formation of specific phases on the alloy surface at high temperatures, along with the growth kinetics of the oxide layer.
Article
Materials Science, Multidisciplinary
Bin Liang, Xingqi Liao, Bo Geng, Qishuai Zhu, Ming Yu, Jiacheng Li, Kangwei Liu, Dechang Jia, Zhihua Yang, Yu Zhou
Summary: MXenes, with their impressive mechanical and physicochemical properties, show great potential in various applications. However, not much research has been done on their high-temperature properties, particularly in silicoboron carbonitride (Si-B-C-N) composite ceramics above 1500 degrees C. In this study, the influence of MXene (Ti3C2Tx) additives on the oxidation resistance of Si-B-C-N ceramics was investigated for the first time at temperatures up to 1600 degrees C. The results show that the addition of 3.0 wt% Ti3C2Tx can improve the oxidation resistance at 1600 degrees C, while higher or lower additions may worsen the anti-oxidation properties.
Article
Chemistry, Physical
Anurag Gautam, Pragya Komal, Ram Sevak Singh, Prabhat Gautam, S. K. Manjari, R. S. Ningthoujam
Summary: This paper reports the direct synthesis of water dispersed gold nanoparticles encapsulated in polyvinyl alcohol (PVA) as a reducer and capping agent. The nanoparticles were found to have a fcc crystal structure with a size of around 22 nm, as confirmed by XRD and SEM analysis. The UV-visible analysis showed a surface plasmon resonance band at approximately 550 nm, confirming the formation of gold nanoparticles, which was further supported by EDX analysis.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Ceramics
Yun-Han Su, Cheng-Tang Pan, Yu-Sheng Tseng, Ji Zhang, Wen-Fan Chen
Summary: Cerium (Ce)-substituted diopsides were fabricated with enhanced mechanical strength and bioactivity, with 0.25 mol Ce showing the best biomineralization performance in vitro but hindrance of hydroxyapatite precipitation with increasing Ce dopant levels. The release of Ca and Mg ions controlled the pH value, and the mechanical strength of matrices was related to phase transformation, elastic modulus, and ion release.
CERAMICS INTERNATIONAL
(2021)
