Article
Environmental Sciences
Yueh-Feng Li, Ching-Yao Hu, Yu-Chi Lee, Shang-Lien Lo
Summary: This study found that adding ZnCl2 can increase the efficiency of EC for PFOA, and the longer the carbon chain of PFA, the better the removal by EC. Chemical bonding between aluminum and fluoride was observed. The main functions of ZnCl2 were to prevent the rise in pH and improve flotation.
Article
Chemistry, Physical
Nirmala Rani, Kanika Khurana, Neena Jaggi
Summary: CNTs based nanocomposites are highly promising materials in various fields due to their excellent properties. This research focused on spectroscopic study of FMWCNTs nanocomposites with different wt% of SnO2 NPs, confirming structural defects through XRD and Raman spectroscopy, chemical composition through XPS, and morphology through FESEM and TEM analysis. FTIR spectroscopy was used to validate the presence of different functional groups on the FMWCNTs and SnO2/FMWCNTs nanocomposites.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Lei Qiu, Xiaofang Lai, Jikang Jian
Summary: The study demonstrates the substrate-independent growth of single-crystal SnSe nanoplates with a square-like shape using physical vapor deposition. The nanoplates are well-crystallized and exhibit a near-infrared optical band gap, suggesting potential applications in optoelectronic devices.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Chemical
Md Noor Arifin, Mostafa Tarek, Md Maksudur Rahman Khan
Summary: In this study, boron-doped TiO2 (B@TiO2) photocatalysts were synthesized using a sol-gel method, and the results showed that the catalysts exhibited enhanced visible light absorption and photocatalytic activity. Through the optimization of catalyst synthesis, the highest degradation rate of 93% was achieved for the model dye.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Jacob M. Garcia, Scott G. Sayres
Summary: Excited state lifetimes of neutral Cr2On clusters were measured using femtosecond pump-probe spectroscopy. Results show that dynamics of excited states are correlated with changes in the electronic structure of the clusters with increasing oxidation. The study reveals the phenomenon of long-lived response in clusters with significant d-electron character, as well as the gradual transition from semiconductor to metallic behavior at the molecular level.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Rabia Zafar, Seon Yeong Park, Chang Gyun Kim
Summary: This study examined the effects of ozone and UV on the surface alterations of polyethylene microplastics in aquatic environments. The results showed that regardless of the ozone dosage, O-3 +UV was more effective in oxidizing the surface of the microplastic particles.
ENVIRONMENTAL ENGINEERING RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Asmaa Ratep, Ismail Kashif
Summary: The study examines the impact of substituting CuO with Fe2O3 on the iron oxidation state and electrical conductivity of lithium borosilicate glass samples. Results indicate that the homogeneity of the glass increases with higher iron concentrations, and the ratios of Fe+2/Fe+3 are influenced by CuO. Moreover, iron ions in the glass samples mainly exist in the form of Fe2O3 in the ferrous state, with more than 7.5% concentration. Additionally, electrical conductivity is found to depend on the oxidation state of copper and the mixed transition metal effect.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
Rubby Mahajan, Ram Prakash, Sandeep Kumar, Vinay Kumar, R. J. Choudhary, D. M. Phase
Summary: In this study, Mg3(1-x)Dy3x(PO4)(2) phosphors with varying doping ratios were successfully synthesized using urea as fuel. XRD analysis confirmed a monoclinic structure for both undoped and Dy3+ (2 mol. %) doped phosphors. The PL emission spectra showed yellowish white light emission when excited with near UV light, and the band gap of Dy3+ (2 mol. %) doped Mg-3(PO4)(2) was decreased compared to undoped phosphor due to the formation of intermediate energy levels.
Article
Electrochemistry
Adi Vinegrad, Heftsi Ragones, Nishani Jayakody, Gilat Ardel, Meital Goor, Yossi Kamir, Moty Marcos Dorfman, Alexander Gladkikh, Larisa Burstein, Yonatan Horowitz, Steve Greenbaum, Diana Golodnitsky
Summary: In this research, polylactide-polyethylene-oxide blended membranes were developed and printed using fused-filament fabrication, with an ionic liquid infused to produce quasi-solid polymer electrolytes. The study found that increasing the content of polyethylene oxide led to a significant improvement in bulk conductivity of the membranes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Ludovic Goffart, Bernard Pelissier, Gauthier Lefevre, Yannick Le-Friec, Christophe Vallee, Gabriele Navarro, Jean-Philippe Reynard
Summary: Phase-Change Memory technology is maturing and attracting interest for future non-volatile memory applications. A protocol using pARXPS technique was developed to measure oxidation thickness on Ge-rich GST alloys, revealing a double oxidation kinetic and influence of nitrogen doping. Analysis was conducted using pARXPS and TEM-EDX techniques.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Y. S. Hedberg, Z. Wei, S. McCarrick, V. Romanovski, J. Theodore, E. M. Westin, R. Wagner, K. -A. Persson, H. L. Karlsson, I. Odnevall Wallinder
Summary: This study explored the impact of fluorides added to flux-cored wire electrodes on the solubility and toxicity of welding fume particles. Results showed that welding fume particles containing NaF released higher amounts of Cr(VI) and exhibited increased cytotoxicity and genotoxicity in-vitro. The presence of NaF did not directly affect the solubility of Cr(VI) in welding fumes, but possibly played an indirect role in reducing Mn release and Cr(VI) release from solid wire fume particles.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yuki Hirata, Kanta Yoshii, Mikito Yoshizato, Hiroki Akasaka, Naoto Ohtake
Summary: This article presents a new method for synthesizing h-BN on a Cu substrate using magnetron sputtering and heat annealing. The structure and thickness of h-BN films can be controlled by adjusting the radio-frequency power, temperature, and synthesis time.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
G. Greczynski, L. Hultman
Summary: The peak position of C 1s can be affected by the vacuum level alignment and differential charging. However, recent studies suggest that differential charging may not be the general cause of C 1s peak shifts. Experimental results confirm that the binding energy of C 1s peaks in metal foils is determined by their work function values.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Jinyu Gao, Qiang Zhao, Cheng Tan, Shaohua Xie, Yadong Yin, Fudong Liu, Haizhou Liu, Baoliang Chen, Jinyong Liu
Summary: Adding CrIII or AlIII salts to PGM catalysts in water suspension can greatly accelerate the reduction of oxyanion pollutants. The addition of K2CrVIO4, K2CrVI2O7, or KCrIII(SO4)2 to Pd/C enhances the reduction of BrO3- by 6-fold. The immobilization of reduced CrVIas CrIII(OH)3 on the catalyst surface increases the adsorption equilibrium constant for BrO3- onto Pd/C by 37-fold.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Roman I. Romanov, Ivan V. Zabrosaev, Anastasia A. Chouprik, Dmitry I. Yakubovsky, Mikhail K. Tatmyshevskiy, Valentyn S. Volkov, Andrey M. Markeev
Summary: Metal-Organic CVD method allows for deposition of high-quality ultrathin 2D transition metal dichalcogenides films onto wafer-scale substrates. The effect of temperature on the structure, chemical states, and electronic qualities of the films was investigated. The results demonstrate a relationship between crystallite domains size and sulfur vacancies concentration, suggesting that vacancies primarily form at the grain boundaries and contribute to the increase in resistivity.