Choong, Choe Earn Wong, Kien Tiek Kim, Hyeseong Jang, Seok Byum Yoon, So Yeon Nah, In Wook Kim, Wooyul Kim, Sang-Hyoun Jeon, Byong-Hun Yoon, Yeomin Jang, Min 2024-01-19T15:30:53Z 2024-01-19T15:30:53Z 2022-01-10 2021-02-15 0043-1354 https://pubs.kist.re.kr/handle/201004/117394 l Herein, we discovered and reported oxygen vacancies in silicon oxycarbide containing granular palm shell activated carbon (Si-PSAC) as a photocatalyst under UV irradiation. A strong correlation between the atomic content of Si1+, oxygen vacancies and photocatalytic performance of Si-PSAC was obtained. Based on the electron paramagnetic resonance and photoluminescence analyses, Si-PSAC under UVA(365) irradiation exhibited a higher donor density, better charge transfer and lower electron-hole recombination than that under the other light sources, leading to a higher O-2(center dot-) production efficiency. Si-PSAC exhibited effective removal performance for various anionic dyes and endocrine-disrupting chemicals under UVA(365) irradiation. Continuous-flow column tests revealed the life span of Si-PSAC under UVA(365) irradiation was extended by more than 16-fold compared to adsorption column. Since the oxygen vacancies can be created from the naturally present Si in the biomass derived Si-PSAC during the activation, this unexpected discovery of O-2(center dot-) production can extend commercially-available Si-PSAC into the full-scale photocatalysis. (c) 2020 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD METHYLENE-BLUE TIO2 DEGRADATION PHOTOCATALYST OXIDATION COATINGS Unexpected discovery of superoxide radical generation by oxygen vacancies containing biomass derived granular activated carbon Article 10.1016/j.watres.2020.116757 1 WATER RESEARCH, v.190 WATER RESEARCH 190 scie scopus 000632807700064 2-s2.0-85098072933 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article METHYLENE-BLUE TIO2 DEGRADATION PHOTOCATALYST OXIDATION COATINGS Granular palm shell activated carbon Oxygen vacancies Superoxide radical Adsorption Photocatalyst