Results 11 to 20 of about 3,066 (157)

Influence of polyethylene glycol on the physical properties of Co0.2Fe2.8O4 nanoparticles used as MRI contrast agent; synchrotron radiation Fe K-edge XAFS

Journal of Materials Research and Technology, 2021
We have synthesized and characterized the surface-modified nanoparticles (NPs) of Co0.2Fe2.8O4/x polyethylene glycol (PEG) (x = 0, 10, 20, 30, and 40%).
N.G. Imam, Mennatallah AbouHasswa, Giuliana Aquilanti, S.I. El Dek, N. Okasha, Ahmed A.G. Al Shahawy   +5 more
doaj   +1 more source

XAFS Analysis of Sulfuric Acid Solution Related to the Effect of Bi in Suppressing the Disproportionation Reaction of Mn3+ in Mn/Ti Redox Flow Cells

Electrochemistry, 2023
In sulfuric acid (H2SO4) aqueous solutions containing manganese (Mn) and titanium (Ti) ions, which are used for the positive electrolyte in redox flow (RF) batteries, the addition of a small quantity of bismuth (Bi) has been found to be very effective in
Junji IIHARA, Kazuya TOKUDA, Yoshihiro SAITO   +2 more
doaj   +1 more source

Generating Mechanism of Catalytic Effect for Hydrogen Absorption/Desorption Reactions in NaAlH₄–TiCl₃

Applied Sciences, 2021
The hydrogen desorption and absorption reactions of the complex metal hydride NaAlH4 are disproportionation processes, and the kinetics can be improved by adding a few mol% of Ti compounds, although the catalytic mechanism, including the location and ...
Kazutaka Ikeda, Fumika Fujisaki, Toshiya Otomo, Hidetoshi Ohshita, Takashi Honda, Toru Kawamata, Hiroshi Arima, Kazumasa Sugiyama, Hitoshi Abe, Hyunjeong Kim, Kouji Sakaki, Yumiko Nakamura, Akihiko Machida, Toyoto Sato, Shigeyuki Takagi, Shin-ichi Orimo   +15 more
doaj   +1 more source

Data science assisted investigation of catalytically active copper hydrate in zeolites for direct oxidation of methane to methanol using H2O2

Scientific Reports, 2021
Dozens of Cu zeolites with MOR, FAU, BEA, FER, CHA and MFI frameworks are tested for direct oxidation of CH4 to CH3OH using H2O2 as oxidant. To investigate the active structures of the Cu zeolites, 15 structural variables, which describe the features of ...
Junya Ohyama, Airi Hirayama, Nahoko Kondou, Hiroshi Yoshida, Masato Machida, Shun Nishimura, Kenji Hirai, Itsuki Miyazato, Keisuke Takahashi   +8 more
doaj   +1 more source

Upgrade of transmission XAFS data acquisition system upgrade of Shanghai Synchrotron Radiation Facility BL14W1 beamline station

He jishu, 2022
BackgroundX-ray absorption spectroscopy (XAS) has a wide range of applications in materials science, biology, chemistry and other fields.PurposeThis study aims to improve the efficiency of transmission acquisition of synchrotron X-ray absorption fine ...
LIU Hongzhou, LI Ji, GU Songqi, SU Xiaozhi, MEI Bingbao, JIANG Zheng, LIU Zhi   +6 more
doaj   +1 more source

Integration of X-ray absorption fine structure databases for data-driven materials science

Science and Technology of Advanced Materials: Methods, 2023
With the aim of introducing data-driven science and establishing an infrastructure for making X-ray absorption fine structure (XAFS) spectra findable and reusable, we have integrated XAFS databases in Japan. This integrated database (MDR XAFS DB) enables
Masashi Ishii, Kosuke Tanabe, Asahiko Matsuda, Hironori Ofuchi, Takahiro Matsumoto, Toyonari Yaji, Yasuhiro Inada, Hiroaki Nitani, Masao Kimura, Kiyotaka Asakura   +9 more
doaj   +1 more source

DAFNE-Light DXR1 Soft X-Ray Synchrotron Radiation Beamline: Characteristics and XAFS Applications

Condensed Matter, 2019
X-ray Absorption Fine Structure Spectroscopy (XAFS) is a powerful technique to investigate the local atomic geometry and the chemical state of atoms in different types of materials, especially if lacking a long-range order, such as nanomaterials, liquids,
Antonella Balerna
doaj   +1 more source

Assessing the prospect of XAFS experiments of metalloproteins under in vivo conditions at Indus-2 synchrotron facility, India

Journal of Synchrotron Radiation, 2023
The feasibility of X-ray absorption fine-structure (XAFS) experiments of ultra-dilute metalloproteins under in vivo conditions (T = 300 K, pH = 7) at the BL-9 bending-magnet beamline (Indus-2) is reported, using as an example analogous synthetic Zn (0.1 ...
Debdutta Lahiri, Richa Agrawal, Khileshwari Chandravanshi, Parasmani Rajput, Ankur Agrawal, Ashutosh Dwivedi, Ravindra D. Makde, S. N. Jha, Nandini Garg   +8 more
doaj   +1 more source

Coupling between γ-irradiation and synchrotron-radiation-based XAFS techniques for studying Mn-doped ZnO nanoparticles

Journal of Synchrotron Radiation, 2022
γ-Irradiation and synchrotron-radiation-based X-ray absorption fine-structure (XAFS) spectroscopy have been used to induce structure disorder through the interaction of γ-rays (200 kGy) with fabricated Mn-doped ZnO nanoparticles (NPs) and then to examine
N. G. Imam, Messaoud Harfouche, A. A. Azab, S. Solyman   +3 more
doaj   +1 more source

Data acquisition system of a von Hamos X-ray emission spectrometer based on PILATUS detector

He jishu, 2022
BackgroundHigh energy resolution X-ray emission spectroscopy (XES) has higher energy resolution than conventional X-ray absorption fine structure spectroscopy (XAFS), hence a powerful tool to explore the fine electronic structure of matter.
GU Songqi, MEI Bingbao, JIANG Zheng, HUANG Yuying   +3 more
doaj   +1 more source