DC Field | Value | Language |
---|---|---|
dc.contributor.author | 구민석 | - |
dc.contributor.author | 한승목 | - |
dc.contributor.author | 조강우 | - |
dc.contributor.author | 최원용 | - |
dc.date.accessioned | 2021-11-10T01:50:12Z | - |
dc.date.available | 2021-11-10T01:50:12Z | - |
dc.date.created | 2021-11-08 | - |
dc.date.issued | 2021-09 | - |
dc.identifier.issn | 2690-0645 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/107445 | - |
dc.description.abstract | Bromide ion (Br–) can be oxidized to reactive bromine species (RBS; Br•, Br2•–, and HOBr/OBr–) which can serve as an effective alternative to chlorine disinfectant. This study investigated the generation of RBS in a photoelectrochemical (PEC) system using an electrochromic TiO2 nanotube arrays (Blue-TNTs) electrode under UV light (λ > 320 nm) and demonstrated the effect of RBS on the direct conversion of ammonium (NH4+) to dinitrogen (N2) with near 100% efficiency. The PEC system utilizing in situ generated RBS not only removed NH4+ more efficiently than photocatalytic (PC) and electrochemical (EC) systems but also prevented the generation of unwanted products (i.e., NO2– and NO3–). In addition, compared with the PEC-Cl system, the PEC-Br system exhibited a superior ammonium removal efficiency (16% vs 95% for 120 min of reaction; under air-equilibrated condition). The PEC system also showed higher NH4+ removal efficiency and lower energy consumption when compared to an EC system (using a boron-doped diamond electrode). While bromate ions (BrO3–) are produced as a toxic byproduct of bromide oxidation in a typical ozonation system, the Blue-TNTs PEC-Br system fully hinders the bromate formation as long as ammonium is present in the solution because RBS rapidly reacts with NH4+ with little chance of further oxidation to bromate. | - |
dc.language | English | - |
dc.publisher | American Chemical Society (ACS) | - |
dc.relation.isPartOf | ACS ES&T Engineering | - |
dc.title | Quantitative Photoelectrochemical Conversion of Ammonium to Dinitrogen Using a Bromide-Mediated Redox Cycle | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsestengg.1c00119 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS ES&T Engineering, v.1, no.9, pp.1287 - 1297 | - |
dc.citation.endPage | 1297 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 1287 | - |
dc.citation.title | ACS ES&T Engineering | - |
dc.citation.volume | 1 | - |
dc.contributor.affiliatedAuthor | 구민석 | - |
dc.contributor.affiliatedAuthor | 한승목 | - |
dc.contributor.affiliatedAuthor | 조강우 | - |
dc.contributor.affiliatedAuthor | 최원용 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | other | - |
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