In this study, a ternary layered double hydroxide containing Zn, Co, and Fe transition metals (ZnCoFe LDH) was developed using a co-precipitation procedure. The as-synthesized photocatalyst was evaluated for its perfor-mance in the degradation of methylene blue (MB) under visible light irradiation. The effects of various process conditions including photocatalyst dosage, pollutant concentration, pH, lamp distance, and lamp power were investigated. The ZnCoFe LDH achieved approximately 74 photodegradation efficiency owing to the narrow bandgap of 2.14 eV. The Langmuir-Hinselwood rate constants were calculated as 1.17 min-1 and 3.55 min-1 for photolysis by LED lamp alone and for photocatalysis by LED/ZnCoFe LDH, respectively. The photocatalytic ability of the LDH was attributed to the generation of radical species like center dot OH and O2 center dot-. The photocatalytic degradation intermediates of MB were determined by GC-MS analysis. The catalyst retained its performance throughout seven reuse cycles with only a 4.17 reduction in removal efficiency. The energy per order EEO of the ZnCoFe/LED process in 180 min treatment time was determined as 5.41 kWh.m- 3. order-1. This study shows that ZnCoFe LDH has sufficient activity and photostability for long-term application in photocatalytic water treatment.
Название публикации (dc.title) | Synthesis of visible light responsive ZnCoFe layered double hydroxide towards enhanced photocatalytic activity in water treatment |
Автор/ы (dc.contributor.yazarlar) | Ramazan Keyikoğlu, Irmak Naz Doğan, Alireza Khataeea, Yasin Orooji, Mehmet Kobya, Yeojoon Yoon |
Вид публикации (dc.type) | Makale |
Язык (dc.language) | İngilizce |
Год публикации (dc.date.issued) | 2022 |
Национальный/Международный (dc.identifier.ulusaluluslararasi) | Uluslararası |
Источник (dc.relation.journal) | Chemosphere |
Номер (dc.identifier.issue) | 1 |
Том/№ (dc.identifier.volume) | 309 |
Страница (dc.identifier.startpage) | Article Number: 136534 |
ISSN/ISBN (dc.identifier.issn) | ISSN: 0045-6535; Online ISSN: 1879-1298 |
Издатель (dc.publisher) | Elsevier |
Базы данных (dc.contributor.veritaban) | Web of Science Core Collection |
Базы данных (dc.contributor.veritaban) | Sciencedirect |
Базы данных (dc.contributor.veritaban) | Scopus |
Вид индекса (dc.identifier.index) | SCI Expanded |
Вид индекса (dc.identifier.index) | Scopus |
Импакт-фактор (dc.identifier.etkifaktoru) | 8,943 / 2021-WOS / 5 Year: 8,52 |
Резюме (dc.description.abstract) | In this study, a ternary layered double hydroxide containing Zn, Co, and Fe transition metals (ZnCoFe LDH) was developed using a co-precipitation procedure. The as-synthesized photocatalyst was evaluated for its perfor-mance in the degradation of methylene blue (MB) under visible light irradiation. The effects of various process conditions including photocatalyst dosage, pollutant concentration, pH, lamp distance, and lamp power were investigated. The ZnCoFe LDH achieved approximately 74 photodegradation efficiency owing to the narrow bandgap of 2.14 eV. The Langmuir-Hinselwood rate constants were calculated as 1.17 min-1 and 3.55 min-1 for photolysis by LED lamp alone and for photocatalysis by LED/ZnCoFe LDH, respectively. The photocatalytic ability of the LDH was attributed to the generation of radical species like center dot OH and O2 center dot-. The photocatalytic degradation intermediates of MB were determined by GC-MS analysis. The catalyst retained its performance throughout seven reuse cycles with only a 4.17 reduction in removal efficiency. The energy per order EEO of the ZnCoFe/LED process in 180 min treatment time was determined as 5.41 kWh.m- 3. order-1. This study shows that ZnCoFe LDH has sufficient activity and photostability for long-term application in photocatalytic water treatment. |
URL (dc.rights) | https://www.sciencedirect.com/science/article/abs/pii/S0045653522030272 |
DOI (dc.identifier.doi) | 10.1016/j.chemosphere.2022.136534 |
Факультет / Институт (dc.identifier.fakulte) | Mühendislik Fakültesi |
Кафедра (dc.identifier.bolum) | Çevre Mühendisliği Bölümü |
Автор(ы) в учреждении (dc.contributor.author) | Mehmet KOBYA |
№ регистрации (dc.identifier.kayitno) | BL56B566D0 |
Дата регистрации (dc.date.available) | 2022-11-03 |
Заметка (Год публикации) (dc.identifier.notyayinyili) | December 2022 |
Wos No (dc.identifier.wos) | WOS:000868172300006 |
Тематический рубрикатор (dc.subject) | hydrotalcite |
Тематический рубрикатор (dc.subject) | electrical energy per order |
Тематический рубрикатор (dc.subject) | methylene blue |
Тематический рубрикатор (dc.subject) | photocatalyst |
Тематический рубрикатор (dc.subject) | pollutant degradation |