Article
Chemistry, Multidisciplinary
Alexander Zahariev, Boriana Tzaneva, Nikolay Kaloyanov, Yordanka Marcheva, Veneta Parvanova, Christian Girginov
Summary: The anodic behavior of bismuth in aqueous p-toluenesulfonic acid at three different concentrations was studied, revealing the formation of a white precipitate at specific potentials. The composition and crystallinity of the product were determined through various analytical methods, showing that electrochemical synthesis of the product is possible at 1.0 V.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Composites
M. J. Tommalieh
Summary: A new composite material, Chitosan/Poly (Vinyl Alcohol) blend embedded by bismuth(III) oxide nanoparticles (Bi2O3 NPs), was prepared to improve electrical properties. XRD analysis revealed the crystal structure characteristics and average crystal size of the bismuth oxide nanoparticles, while vibration frequencies confirmed the presence of the nanoparticles. Conductivity and space charge volume increased due to the pathways between the bismuth nanoparticles.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Gang Liu, Chunpeng Gao, Xinmei Liu, Xiaoyi Wang, Miaomiao Liu, Yunlong Chen, Guanxiang Wang, Zhengchun Teng, Wenlong Yang
Summary: In this study, the enhanced photocatalytic activity of delta-Bi2O3 nanoparticles under visible light irradiation was demonstrated. Nanostructured delta-Bi2O3 with a size of less than 50 nm was successfully synthesized by a simple chemical precipitation method. The delta-Bi2O3 nanoparticles showed superior activity towards various pollutants under visible light, which can be attributed to their microstructure and the presence of oxygen vacancies in the defective fluorite structure. The findings of this work provide a new approach to enhance the photocatalytic performance of delta-Bi2O3 without the need for additional compounds.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Chemical
R. Mithun Prakash, C. Ningaraju, K. Gayathri, Y. N. Teja, M. Aslam Manthrammel, Mohd. Shkir, S. AlFaify, M. Sakar
Summary: This paper reports a solution auto-combustion (AC) process for the rapid synthesis of Fe3O4 nanoparticles derived from the sol-gel (SG) process. By using citric acid (CA) and tartaric acid (TA) as gelling agents in the SG process, citric acid acts as a fuel that combusts the gel and yields highly magnetic crystalline Fe3O4 nanoparticles in one step. In contrast, different concentrations of citric acid and any concentrations of tartaric acid do not induce combustion and only result in amorphous iron oxides. Upon annealing, the CA and TA derived iron oxide samples transform into crystalline alpha-Fe2O3 particles. Photocatalytic studies show that the synthesized Fe3O4 nanoparticles exhibit higher photocatalytic efficiency and stability under simulated solar light irradiation.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yayuk Astuti, Fikrian Kasalji, Didik Setiyo Widodo, Hendri Widiyandari
Summary: This study focused on synthesizing bismuth oxide using the solution combustion method and investigating the effects of fuel-oxidant ratio on its characteristics and photocatalytic activity. The results showed that the band gap and photocatalytic activity of bismuth oxide were influenced by the fuel-oxidant ratio.
DESALINATION AND WATER TREATMENT
(2021)
Article
Thermodynamics
Umit Agbulut, Erdem Elibol, Tuna Demirci, Suat Saridemir, Ali Etem Gurel, Upendra Rajak, Asif Afzal, Tikendra Nath Verma
Summary: The present paper investigates the use of graphene oxide nanoparticles in a blend of waste cooking oil methyl ester and diesel fuel, and its effects on combustion, injection, performance, and emission characteristics of a diesel engine. The results show that the addition of nanoparticles improves the performance and reduces emissions.
Article
Chemistry, Physical
Rajabathar Jothi Ramalingam, Prabhakarn Arunachalam, Mabrook S. Amer, Zeid A. AlOthman, Abdullah G. Alanazi, Murefah M. Al-Anazy, Hamad A. Al-Lohedan, Wasmiah Mohammed Dahan
Summary: In this study, pristine silver nanoparticles and silver-graphene oxide nanoparticles were incorporated into Bismuth doped manganese oxide nanotubes using an ultra-sonication deposition method. The resulting composite materials showed improved thermal stability and nanotube formation, with nanotube diameters ranging from 10-25 nm and lengths ranging from 40-50 nm, as confirmed by high resolution transmission electron micrographs. The band gap values of the prepared composites were also calculated, with the Ag-Bi-MnOx/GO composite having a bandgap value of 1.93 eV and Bi-MnOx having a value of 2.47 eV. Further analysis showed that the silver nanoparticle-graphene oxide modified Bi-MnOx composite exhibited enhanced electrochemical activity for clean energy technology applications.
Article
Chemistry, Inorganic & Nuclear
Zouaoui Khiera, Talbi Bouazza, Berahal Mohamed, Sellami Mayouf, Caignaert Vincent
Summary: A new pyrochlore solid solution B1.5Sb1.5Zn1-xCuxO7 has been synthesized at 1000 degrees C using ceramic method, showing a linear decrease in cell parameter with decreasing zinc concentration on B and A sites. Rietveld refinement confirmed its cubic pyrochlore structure and Fd-3m symmetry. The UV-diffuse measurement showed absorbance evolution between UV and visible domain, while the energy band gap calculated by the Tauc method decreased regularly from 3.15 eV to 1.84eV as the copper content increased. Dielectric properties revealed an increase in electrical conductivity with copper content.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Amika Gahlawat, Monika Sindhu, Ajit Sharma, Karan Singh Maan, Prabal Pratap Singh, Radhamanohar Aepuru, Deepak Kumar
Summary: A simple, low-cost and precursor-free synthetic technique was used to synthesize Bismuth titanate (BT) perovskite nanomaterials under surfactant-free conditions. Crystal structure was confirmed by powdered X-ray diffraction, and surface morphology of the synthesized nanoparticles was analyzed by FESEM. The band gap of the nanoparticles was calculated to be 3.25 eV using Tauc plot from diffused reflectance spectroscopy (DRS-UV). The photocatalytic efficiency of the nanoparticles was evaluated by hydrogen evolution reaction in a photochemical cell reactor with a xenon lamp, using triethanolamine (TEOA) and methanol as scavengers. The maximum hydrogen yield of 39.24 mu mol/g was achieved with methanol.
Article
Chemistry, Physical
Linda Viviana Garcia-Quinonez, Dario Colorado-Garrido, Adolfo Collado-Hernandez, Daniel Arturo Acuna-Leal, Guadalupe Alan Castillo-Rodriguez, Daniel Fernandez-Gonzalez, Eduardo Martinez-Guerra, Maria Isabel Mendivil-Palma, Cristian Gomez-Rodriguez
Summary: Bismuth titanate (BTO) nanoparticles were synthesized by pulsed laser ablation in different liquid media, and their morphology and structure were characterized. The results demonstrate that this method can produce high-quality BTO nanoparticles with enhanced optical properties, which have potential applications in photocatalysis.
Article
Chemistry, Inorganic & Nuclear
N. Subhashini, S. Revathi, Mohd Ubaidullah, Abdullah M. Al-Enizi, S. Muthulakshmi, D. Thiripurasundari, Shoyebmohamad F. Shaikh, Ayman Nafady, Meera Moydeen Abdulhameed, Nouf B. B. Alanzi, Rayana Ibrahim Alkhalifah, Chandra Sekhar Dash, M. Sundararajan, M. Sukumar
Summary: The combustion-based synthesis of BiFeO3 (BFO) and Gd:BFO perovskite nanoparticles was presented. XRD analysis showed that the undoped BFO sample had a single perovskite phase with a rhombohedral structure, while the Gd-doped samples exhibited a structural phase transformation from rhombohedral to orthorhombic. The presence of Bi3+, Gd3+, Fe2+, and O2+ ions in the perovskite samples was confirmed by XPS, and elemental functional groups were detected by FT-IR spectroscopy. The direct band gap decreased as the Gd concentration increased. The synthesized catalysts, particularly Gd:BFO (x = 0.25), exhibited higher conversion and selectivity efficiencies for glycerol in catalytic oxidation studies.
DALTON TRANSACTIONS
(2023)
Article
Polymer Science
A. A. Ali, I. S. Ahmed, E. M. Elfiky
Summary: Iron oxide nanoparticles (hematite; alpha-Fe2O3) were successfully fabricated using an auto-combustion technique with different fuels. Various characterization tools were used to study the synthesized nanoparticles, revealing their structure and size. The fabricated alpha-Fe2O3 nano-adsorbent exhibited high adsorption capacity for lead ions under optimal conditions.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Materials Science, Ceramics
D. N. V. V. Konda Lutukurthi, Suman Dutta, Dilip Kumar Behara
Summary: In this study, nanosized zinc oxide powders were synthesized using urea-nitrate solution combustion synthesis with activated carbon as a template and secondary fuel. The powders exhibited reduced crystallite size and increased specific surface area when activated carbon was used as a secondary fuel. This led to enhanced photocatalytic activity in dye degradation, showcasing the potential of this single-step synthesis method for various applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Rita Firmino, Emanuel Carlos, Joana Vaz Pinto, Jonas Deuermeier, Rodrigo Martins, Elvira Fortunato, Pedro Barquinha, Rita Branquinho
Summary: This study focuses on developing solution-combustion-processed hafnium-doped In2O3 thin films and evaluating the effects of different annealing parameters on the properties of transparent conducting oxides. The optimized TCOs exhibit high transparency, low resistivity, and good carrier mobility, bringing solution-based TCOs a step closer to low-cost optoelectronic applications.
Article
Chemistry, Physical
Nikolaos D. Adamopoulos, Nikos G. Tsierkezos, Afroditi Ntziouni, Fu Zhang, Mauricio Terrones, Konstantinos V. Kordatos
Summary: This study synthesized and characterized three different nanocomposite materials, including silver and zinc oxide nanoparticles modified reduced graphene oxide (rGO), and rGO modified with both silver and zinc oxide nanoparticles. These materials were characterized using XRD, FTIR, TGA, Raman spectroscopy, SEM, and TEM techniques. The electrochemical responses of these materials towards the standard ferrocyanide/ferricyanide [Fe(CN)6]3-/4- redox system were investigated using CV and EIS techniques. The results showed that ZnO modified rGO exhibited excellent electrochemical performance, attributed to the high surface area of ZnO, providing a larger electrode/electrolyte interface and more sites at the electrolyte-ZnO interface.
