http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Chitiphon Chuaicham,Takumi Inoue,Vellaichamy Balakumar,Quanzhi Tian,Keiko Sasaki 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
Visible active photocatalysts have attracted interest as a potentially efficient and sustainable approach forpollutant degradation treatment. In this work, ZnCr mixed metal oxide/fly ash (ZnCr-MMO/FA) compositeswere prepared using fly ash (FA) from China coal mining power plants to improve photocatalytic performance. The formation of the ZnCr-MMO/FA composites was proved by XRD results which showed thetwo-phases combination of FA and MMO. Also, the presence of FA in the ZnCr-MMO/FA composite provideda good arrangement of small particles of ZnCr-MMO on the surface of FA and higher light absorptionability with a lower energy bandgap compared with the pure ZnCr-MMO. The photocatalyticperformance of the prepared ZnCr-MMO and ZnCr-MMO/FA composites in different FA contents wasevaluated by degradation of ciprofloxacin (CIP), which is an antibiotic and often found in pharmaceuticalwastes, under visible light irradiation. Clearly, the ZnCr-MMO/FA composites showed higher photocatalyticdecomposition of CIP than pristine ZnCr-MMO, and the highest degradation performance for CIPwas obtained from the ZnCr-MMO/FA sample with 0.5 mg FA, which has a reaction rate constant approximatelyfour times greater than that of pure ZnCr-MMO. The improved CIP degradation activity of theZnCr-MMO/FA composite might not only be due to the good arrangement of ZnCr-MMO particles onthe FA surface but also high separation and less recombination of photogenerated electrons-holes pairs,proven by the photoluminescence spectra, photocurrent density, and electrochemical impedance spectroscopyresults. The lower recombination of the charge carriers of the ZnCr-MMO/FA composite mightbe caused by the heterojunction between the ZnCr-MMO as a main photocatalyst and FA. Thus, the proposedZnCr-MMO/FA composite can be used as an effective photocatalyst for wastewater treatment,including the decomposition of organic pollutants, such as discarded pharmaceuticals.
New and noteworthy records of the moss flora of Korea
김원희,Masanobu Higuchi,Tomio Yamaguchi,Takumi SATO,Yuya INOUE 한국식물분류학회 2020 식물 분류학회지 Vol.50 No.4
A total of 34 taxa, 33 species and one variety, are newly added to the moss checklist of Korea. They were collected on Jejudo Island, Samcheok limestone areas in Gangwon Province, and Socheongdo Island from 2015 to 2018 and organized into 19 families and 26 genera. Additionally, eight genera are new to Korea. This study verifies the distributions of nine species whose distributions and specimens have remained unknown thus far. Finally, two unrecorded taxa, consisting of one species and one variety, are identified by reexamining Korean specimens deposited at the National Museum and Science in Japan (TNS). The specimens were collected in 1942 and 1940 from Mt. Baekdusan and Anbyun in North Korea.