Search

Your search keyword '"Her, Namguk"' showing total 213 results
Start Over Author "Her, Namguk"
213 results on '"Her, Namguk"'

5. Contributors

Author

Blaney, Lee, primary, Boczkaj, Grzegorz, additional, Chen, Wei-Hsiang, additional, Cheng, Hong, additional, Dionysiou, Dionysios D., additional, Fang, Jingyun, additional, Fernández-Reyes, Bethzaely, additional, Guo, Kaiheng, additional, Hasan, Zubair, additional, Heo, Jiyong, additional, Her, Namguk, additional, Hernández-Maldonado, Arturo J., additional, Hong, Pei-Ying, additional, Hopanna, Mamatha, additional, Huang, Jhang-Ruei, additional, Ibitoye, Temitope, additional, Jhung, Sung Hwa, additional, Khan, Javed Ali, additional, Khan, Nazmul Abedin, additional, Khan, Sanaullah, additional, Kim, Sewoon, additional, Lasalde-Ramírez, José A., additional, Mangalgiri, Kiranmayi, additional, Muñoz-Senmache, Juan C., additional, Ocasio, Daniel, additional, Ortiz-Martínez, Krisiam, additional, Park, Minkyu, additional, Park, Chang Min, additional, Sayed, Murtaza, additional, Shah, Noor S., additional, Snowberger, Sebastian, additional, Snyder, Shane A., additional, Wu, Zihao, additional, Yoon, Yeomin, additional, and Yu, Miao, additional

Published
2020
Full Text
View/download PDF

20. Photocatalytic and electrocatalytic reduction of CO2 by MXene-based nanomaterials: A review.

Author

Heo, Jiyong, Her, Namguk, Jang, Min, Park, Chang Min, Son, Ahjeong, Han, Jonghun, and Yoon, Yeomin

Subjects
*PHOTOREDUCTION, *TRANSITION metal nitrides, *SURFACE chemistry, *NANOSTRUCTURED materials, *TRANSITION metal carbides, *ELECTRIC conductivity, *CATALYTIC hydrogenation
Abstract

Recently, transition metal carbide or nitride (MXene)-based nanomaterials have been broadly investigated as new photocatalysts and electrocatalysts for the reduction of CO2 into valuable energy-rich fuels due to their unique properties such as rich surface chemistries, flexible morphologies, bandgap structures, considerable electrical conductivities, thermal stabilities, and significant specific surface areas. Nevertheless, only a few reviews have been reported on the application of MXenes or MXene-based nanomaterials as advanced photocatalysts and/or electrocatalysts for CO2 reduction, which do not cover new findings and the current development in the application of MXene-based nanomaterials for CO2 reduction. Accordingly, herein, we present a comprehensive review of current findings on the photocatalytic and electrocatalytic reduction of CO2 by various MXene-based nanomaterials. Particularly, this review focuses on the (i) photocatalytic reduction of CO2 by functionalized Ti3C2, TiO2/Ti3C2, g-C3N4/Ti3C2, and other/Ti3C2 catalysts, (ii) electrocatalytic CO2 reduction; (iii) CO2 reduction associated with photothermal catalysis and hydrogenation, and (iv) stability of MXene-based photoelectrocatalysts. Additionally, we have briefly explored the challenges in the large-scale fabrication of MXene-based nanomaterials and proposed the future research prospects of MXene-based nanomaterials. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

38. Determination of perchlorate rejection and associated inorganic fouling (scaling) for reverse osmosis and nanofiltration membranes under various operating conditions

Author

Yoon, Jaekyung, Yoon, Yeomin, Amy, Gary, and Her, Namguk

Subjects
Osmosis -- Research, Chlorates -- Research, Water -- Purification, Water -- Research, Engineering and manufacturing industries, Environmental issues
Abstract

This study focused on perchlorate (CI[O.sup.-.sub.4]) rejection and flux-decline in bench-scale cross-flow flat-sheet filtration for two reverse osmosis (RO) and two nanofiltration (NF) membranes with a natural water, and addressed estimation of precipitative fouling/scaling with inorganic salts and characterizations of inorganic fouling and antiscalants. Thus the study considered tradeoffs between productivity (increased recovery and flux) versus CI[O.sup.-.sub.4] rejection versus membrane fouling/scaling. In this study, the rejection of water quality parameters (cations, anions, dissolved organic carbon, UV[A.sub.254], total dissolved solids) and flux-decline trends for four different membranes were investigated over a various range of operating conditions (i.e., [J.sub.0]/k ratio and recovery). Inorganic foulants on the membrane surface were analyzed by various methods (i.e., x-ray diffraction and scanning electron microscopy), and demonstrated inhibition effects of antiscalant. With increasing recovery and [J.sub.0]/k ratio, high productivity (flux) was achieved, however, the rejections of perchlorate and other water quality parameters decreased and the precipitative fouling/scaling potential of membranes increased. At the same operating conditions in the presence of an antiscalant, embodying phosphonate functional groups, flux decline trends for the four membranes indicated lower scale formation supported by the results of the fouled membrane characterizations. CE Database subject headings: Filtration; Osmosis; Fouling; Water treatment.

Published
2005

Catalog

Books, media, physical & digital resources
See catalog results