Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal

Abstract Novel NaCoxOy adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCoxOy crystallized as hexagonal microsheets of 100–200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15–1.90 m2 g−1. X-ray phot...

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Autores principales:	Nishesh Kumar Gupta, Jiyeol Bae, Kwang Soo Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/39a0a426cde447e9acd52375b4894528
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spelling	oai:doaj.org-article:39a0a426cde447e9acd52375b48945282021-12-02T16:26:22ZMetal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal10.1038/s41598-021-94265-72045-2322https://doaj.org/article/39a0a426cde447e9acd52375b48945282021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94265-7https://doaj.org/toc/2045-2322Abstract Novel NaCoxOy adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCoxOy crystallized as hexagonal microsheets of 100–200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15–1.90 m2 g−1. X-ray photoelectron spectroscopy (XPS) analysis confirmed Co2+ and Co3+ sites in MOFs, which were preserved in NaCoxOy. The synthesized adsorbents were studied for room-temperature H2S removal in both dry and moist conditions. NaCoxOy adsorbents were found ~ 80 times better than the MOF precursors. The maximum adsorption capacity of 168.2 mg g−1 was recorded for a 500 ppm H2S concentration flowing at a rate of 0.1 L min−1. The adsorption capacity decreased in the moist condition due to the competitive nature of water molecules for the H2S-binding sites. The PXRD analysis predicted Co3S4, CoSO4, Co3O4, and Co(OH)2 in the H2S-exposed sample. The XPS analysis confirmed the formation of sulfide, sulfur, and sulfate as the products of H2S oxidation at room temperature. The work reported here is the first study on the use of NaCoxOy type materials for H2S remediation.Nishesh Kumar GuptaJiyeol BaeKwang Soo KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nishesh Kumar Gupta Jiyeol Bae Kwang Soo Kim Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
description	Abstract Novel NaCoxOy adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCoxOy crystallized as hexagonal microsheets of 100–200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15–1.90 m2 g−1. X-ray photoelectron spectroscopy (XPS) analysis confirmed Co2+ and Co3+ sites in MOFs, which were preserved in NaCoxOy. The synthesized adsorbents were studied for room-temperature H2S removal in both dry and moist conditions. NaCoxOy adsorbents were found ~ 80 times better than the MOF precursors. The maximum adsorption capacity of 168.2 mg g−1 was recorded for a 500 ppm H2S concentration flowing at a rate of 0.1 L min−1. The adsorption capacity decreased in the moist condition due to the competitive nature of water molecules for the H2S-binding sites. The PXRD analysis predicted Co3S4, CoSO4, Co3O4, and Co(OH)2 in the H2S-exposed sample. The XPS analysis confirmed the formation of sulfide, sulfur, and sulfate as the products of H2S oxidation at room temperature. The work reported here is the first study on the use of NaCoxOy type materials for H2S remediation.
format	article
author	Nishesh Kumar Gupta Jiyeol Bae Kwang Soo Kim
author_facet	Nishesh Kumar Gupta Jiyeol Bae Kwang Soo Kim
author_sort	Nishesh Kumar Gupta
title	Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
title_short	Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
title_full	Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
title_fullStr	Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
title_full_unstemmed	Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal
title_sort	metal organic framework derived nacoxoy for room temperature hydrogen sulfide removal
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/39a0a426cde447e9acd52375b4894528
work_keys_str_mv	AT nisheshkumargupta metalorganicframeworkderivednacoxoyforroomtemperaturehydrogensulfideremoval AT jiyeolbae metalorganicframeworkderivednacoxoyforroomtemperaturehydrogensulfideremoval AT kwangsookim metalorganicframeworkderivednacoxoyforroomtemperaturehydrogensulfideremoval
_version_	1718384045365133312

Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal

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