Browsing by Author "Park, Hyunwoong"
Now showing items 1-17 of 17
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Catalytic activity of photocharged binary TiO2 and WO3 membrane filters: Effect of Al2O3 interlayer on direct vs. mediated electron transfers
Jiyeon, Park; Kim, Bolam; Han, Dong Suk; Lim, Jonghun; Park, Hyunwoong ( Elsevier , 2022 , Article)One of the challenges facing the practical application of photocatalysis is the termination of catalytic reactions in the absence of irradiation. This study synthesizes photo-charged TiO2/WO3 (TW) and TiO2/Al2O3/WO3 (TAW) ... -
A comparative study on carbon neutral hydrogen carrier production: Formic acid from CO2 vs. ammonia
Arti, Mishra; Kim, Donghyun; Altahtamouni, Talal; Kasak, Peter; Popelka, Anton; Park, Hyunwoong; Han, Dong Suk... more authors ... less authors ( Elsevier Ltd , 2024 , Other)Hydrogen (H2) is increasingly recognized as a key player in the journey towards carbon neutrality, with ammonia (NH3) and formic acid (FA) emerging as significant hydrogen vectors. This review highlights advancements in ... -
Effect of Fe/N-doped carbon nanotube (CNT) wall thickness on CO2 conversion: A DFT study
Sun Hee, Yoon; Park, Hyunwoong; Elbashir, Nimir O.; Han, Dong Suk ( Elsevier , 2020 , Article)Many researches on CO2 adsorption using carbon nanotubes (CNTs) have been actively studied, but experimental and theoretical studies on CO2 conversion are still in demand. In particular, the effect of CNT wall thickness ... -
Electrocatalytic activity of nanoparticulate TiO2 coated onto Ta-doped IrO2/Ti substrates: Effects of the TiO2 overlayer thickness
Miao, Wang; Kim, Byeong-ju; Suk Han, Dong; Park, Hyunwoong ( Elsevier , 2021 , Article)The trade-off between short-term efficiency and long-term durability in electrocatalysis has always been a tough choice. This study examines the electrocatalytic activity of double-layered oxide electrodes comprising a ... -
Electrocatalytic arsenite oxidation in bicarbonate solutions combined with CO2 reduction to formate
Wonjung, Choi; Kim, Minju; Kim, Byeong-ju; Park, Yiseul; Han, Dong Suk; Hoffmann, Michael R.; Park, Hyunwoong... more authors ... less authors ( Elsevier , 2020 , Article)Sunlight-driven water-energy nexus technologies are receiving increasing attention. This study presents a hybrid electrochemical system that catalyzes the oxidation of As(III) to As(V) with a nanoparticulate TiO2 electrocatalyst ... -
Electrocatalytic arsenite oxidation using iron oxyhydroxide polymorphs (α-, β-, and γ-FeOOH) in aqueous bicarbonate solution
Byung Guk, Kim; Park, Jiyeon; Choi, Wonjung; Han, Dong Suk; Kim, Jungwon; Park, Hyunwoong... more authors ... less authors ( Elsevier , 2020 , Article)α-, β-, and γ-FeOOH polymorphs have been synthesized and used for electrocatalytic As(III) oxidation into less toxic As(V) in aqueous bicarbonate solution. As-synthesized FeOOH electrodes exhibit unique crystalline structures ... -
Facile Electrochemical Synthesis of Highly Efficient Copper-Cobalt Oxide Nanostructures for Oxygen Evolution Reactions
Nath, Narayan Chandra Deb; Jeong, Hye Won; Han, Dong Suk; Park, Hyunwoong; Lee, Jae Joon ( Electrochemical Society , 2020 , Article)Nanostructured copper-cobalt oxide (CuxCo3-xO4, CCO) electrodes are grown directly on conducting substrates via electrochemical deposition; then, various factors (e.g., oxygen vacancies, electrochemically active surface ... -
Fouling and performance of outer selective hollow fiber membrane in osmotic membrane bioreactor: Cross flow and air scouring effects
Van, Huy Tran; Lim, Sungil; Jun Park, Myoung; Suk Han, Dong; Phuntsho, Sherub; Park, Hyunwoong; Matsuyama, Hideto; Kyong Shon, Ho... more authors ... less authors ( Elsevier , 2019 , Article)This study assessed impacts of cross-flow velocity (CFV) and air scouring on the performance and membrane fouling mitigation of a side-stream module containing outer-selective hollow fiber thin film composite forward osmosis ... -
In Situ-Generated Reactive Oxygen Species in Precharged Titania and Tungsten Trioxide Composite Catalyst Membrane Filters: Application to As(III) Oxidation in the Absence of Irradiation
Park, Jiyeon; Lim, Jonghun; Park, Yiseul; Han, Dong Suk; Shon, Ho Kyong; Hoffmann, Michael R.; Park, Hyunwoong... more authors ... less authors ( American Chemical Society (ACS) , 2020 , Article)This study demonstrates that in situ-generated reactive oxygen species (ROSs) in prephotocharged TiO2 and WO3 (TW) composite particle-embedded inorganic membrane filters oxidize arsenite (As(III)) into arsenate (As(V)) ... -
Ion-imprinted membranes for lithium recovery: A review
Sifani, Zavahir; Riyaz, Najamus Sahar; Elmakki, Tasneem; Tariq, Haseeb; Ahmad, Zubair; Chen, Yuan; Park, Hyunwoong; Ho, Yeek-Chia; Shon, Ho Kyong; Han, Dong Suk... more authors ... less authors ( Elsevier , 2024 , Article)This review critically examines the effectiveness of ion-imprinted membranes (IIMs) in selectively recovering lithium (Li) from challenging sources such as seawater and brine. These membranes feature customized binding ... -
Porous dendritic BiSn electrocatalysts for hydrogenation of 5-hydroxymethylfurfural
Piao, Guangxia; Yoon, Sun Hee; Cha, Hyun Gil; Han, Dong Suk; Park, Hyunwoong ( Royal Society of Chemistry , 2022 , Article)The electrocatalytic hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)furan (BHMF) is an alternative to conventional heterogeneous catalysis with H2 at high temperatures and pressures. Although Ag ... -
Potential application of hybrid reverse electrodialysis (RED)-forward osmosis (FO) system to fertilizer-producing industrial plant for efficient water reuse
Tasneem, Elmakki; Zavahir, Sifani; Gulied, Mona; Qiblawey, Hazim; Hammadi, Bassim; Khraisheh, Majeda; Shon, Ho Kyong; Park, Hyunwoong; Han, Dong Suk... more authors ... less authors ( Elsevier , 2023 , Article)This study presents an experimental investigation and a parametric analysis of the applicability of agricultural fertigation and power generation using a reverse electrodialysis-forward osmosis (RED-FO) hybrid system, with ... -
Reduced titania nanorods and Ni–Mo–S catalysts for photoelectrocatalytic water treatment and hydrogen production coupled with desalination
Seonghun, Kim; Han, Dong Suk; Park, Hyunwoong ( Elsevier , 2020 , Article)This study presents a ternary hybrid solar desalination process coupled with photoelectrocatalytic water treatment and H2 production in a single device. The desalination of brackish water in the desalination cell is initiated ... -
A review on lithium recovery using electrochemical capturing systems
Sifani, Zavahir; Elmakki, Tasneem; Gulied, Mona; Ahmad, Zubair; Al-Sulaiti, Leena; Shon, Ho Kyong; Chen, Yuan; Park, Hyunwoong; Batchelor, Bill; Han, Dong Suk... more authors ... less authors ( Elsevier , 2021 , Article Review)Resource recovery from natural reserves is appealing and Li extraction from different brines is in the forefront. Li extraction by membranes is reviewed in the literature much more than electrochemical processes. However, ... -
Standalone photoconversion of CO2 using Ti and TiOx-sandwiched heterojunction photocatalyst of CuO and CuFeO2 films
Seung Yo, Choi; Yoon, Sun Hee; Kang, Unseock; Han, Dong Suk; Park, Hyunwoong ( Elsevier , 2021 , Article)Artificial photoconversion of carbon dioxide to value-added chemicals remains a challenge. In this work, we synthesize heterojunction copper oxide and copper iron oxide (CuO/CuFeO2; CFO) films on transparent conducting ... -
Theoretical insight into effect of cation–anion pairs on CO2 reduction on bismuth electrocatalysts
Sun Hee, Yoon; Piao, Guangxia; Park, Hyunwoong; Elbashir, Nimir O.; Han, Dong Suk ( Elsevier , 2020 , Article)This study presents theoretical insight into the mechanism of the CO2 reduction reaction (CO2RR) to formic acid (HCOOH) on Bi (012) surfaces in the presence of alkali metal cations (M+: Cs+, K+, and Li+) and/or halide ... -
Versatile Bifunctional and Supported IrNi Oxide Catalyst for Photoelectrochemical Water Splitting
Zavahir, Sifani; Hafsa, Umme; Park, Hyunwoong; Han, Dong Suk ( MDPI , 2022 , Article)Designing a high-performance electrocatalyst that operates with photon-level energy is of the utmost importance in order to address the world’s urgent energy concerns. Herein, we report IrNi nanoparticles uniformly distributed ...