2026-03-07T03:39:39Z https://hiroshima.repo.nii.ac.jp/oai

oai:hiroshima.repo.nii.ac.jp:02006139 2025-02-21T06:41:42Z 1730444907710

Microwave-Assisted Synthesis of C/SiO2 Composite with Controllable Silica Nanoparticle Size Arif, Aditya F. Arif Aditya F. Taniguchi, Shuto Taniguchi Shuto Izawa, Takafumi Izawa Takafumi Kamikubo, Kazuki Kamikubo Kazuki Iwasaki, Hideharu Iwasaki Hideharu Ogi, Takasi Ogi Takasi open access © 2018 American Chemical Society, This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. AC/SiO composite was produced from 3-aminophenol and tetraethyl orthosilicate (TEOS) by a synthesis protocol that involved microwave irradiation. This protocol featured simultaneous 3-aminophenol polymerization and TEOS hydrolysis and condensation, which were achieved rapidly in a microwave reactor. The SiO2 component was formed from low-concentration TEOS confined in cetyltrimethylammonium bromide micelles. We demonstrated a control of the SiO2 particle size, ranging from 20 to 90 nm, by varying the 3-aminophenol concentration. The carbon component provided a microporous structure that greatly contributed to the high specific surface area, 375 m2/g, and served as a host for the nitrogen functional groups with a content of 5.34%, 74% of which were pyridinic type. The composite formation mechanism was clarified from time-series scanning electron microscopy images and dynamic light scattering analysis. An understanding of the composite formation mechanism in this protocol will enable the design of composite morphologies for specific applications. This work was supported by JSPS KAKENHI Grant Numbers 26709061 and 16K13642 and was partly supported by the Center for Functional Nano Oxides at Hiroshima University. American Chemical Society 2018-04-11 eng journal article VoR https://hiroshima.repo.nii.ac.jp/records/2006139 10.1021/acsomega.8b00340 https://pubs.acs.org/doi/full/10.1021/acsomega.8b00340 2470-1343 ACS Omega ACS Omega 3 4 4063 4063 4069 https://hiroshima.repo.nii.ac.jp/record/2006139/files/acsomega.8b00340.pdf 9.4 MB