TY - JOUR
T1 - Uniform Organically Modified CeO2Nanoparticles Synthesized from a Carboxylate Complex under Supercritical Hydrothermal Conditions
T2 - Impact of Ce Valence
AU - Omura, Yuki
AU - Yoko, Akira
AU - Seong, Gimyeong
AU - Nishibori, Maiko
AU - Ninomiya, Kakeru
AU - Tomai, Takaaki
AU - Adschiri, Tadafumi
N1 - Funding Information:
This study was supported by grants from the Japan Society for the Promotion of Science (JSPS), KAKENHI (grant numbers JP16H06367 and 21H05010), the New Energy and Industrial Technology Development Organization (NEDO), the Japan Science and Technology Agency (JST) [MIRAI; grant number JPMJMI17E4 and CREST, grant number JPMJCR16P3], the Materials Processing Science Project (Materialize; grant number JPMXP0219192801), the Core Research Cluster for Materials Science, and the World Premier International Research Center Initiative─Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, established by the WPI, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. Synchrotron X-ray measurements were performed at SPring-8 BL14B2 (proposal numbers 2021A1648).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/4/7
Y1 - 2022/4/7
N2 - In this study, the supercritical hydrothermal synthesis of cerium oxide (CeO2) nanoparticles from a Ce-carboxylate complex with different valences was performed. Ce(III) and Ce(IV) octanoates were synthesized and hydrothermally treated at 400 °C for 10 min. The Ce valences were confirmed using Ce L3-edge X-ray absorption near-edge structure spectra. The hydrothermally treated products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy. When Ce(III) octanoate was used as the precursor, cerium(III) hydroxide (Ce(OH)3) nanorods were predominantly formed, whereas CeO2(IV) nanoparticles were formed as a minor product. When Ce(IV) octanoate was used, uniform CeO2nanoparticles were synthesized directly.
AB - In this study, the supercritical hydrothermal synthesis of cerium oxide (CeO2) nanoparticles from a Ce-carboxylate complex with different valences was performed. Ce(III) and Ce(IV) octanoates were synthesized and hydrothermally treated at 400 °C for 10 min. The Ce valences were confirmed using Ce L3-edge X-ray absorption near-edge structure spectra. The hydrothermally treated products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy. When Ce(III) octanoate was used as the precursor, cerium(III) hydroxide (Ce(OH)3) nanorods were predominantly formed, whereas CeO2(IV) nanoparticles were formed as a minor product. When Ce(IV) octanoate was used, uniform CeO2nanoparticles were synthesized directly.
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U2 - 10.1021/acs.jpcc.2c00088
DO - 10.1021/acs.jpcc.2c00088
M3 - Article
AN - SCOPUS:85127551370
SN - 1932-7447
VL - 126
SP - 6008
EP - 6015
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 13
ER -