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A general route to modify diatomite with niobates for versatile applications of heavy metal removal

A general solution-phase strategy is developed to synthesize nanostructure niobates such as MnNb(2)O(6), SnNb(2)O(6) and ZnNb(2)O(6) on natural mineral diatomite for water environmental remediation. (NH(4))(2)C(2)O(4) aqueous solution is the key to achieve a scalable and controllable synthesis of ni...

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Detalles Bibliográficos
Autores principales: Wang, Tianning, Yang, Yunfei, Wang, Jinshu, Wu, Junshu, Sun, Lingmin, Du, Yucheng, Li, Yongli, Li, Hongyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9060482/
https://www.ncbi.nlm.nih.gov/pubmed/35518093
http://dx.doi.org/10.1039/c8ra10186h
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author Wang, Tianning
Yang, Yunfei
Wang, Jinshu
Wu, Junshu
Sun, Lingmin
Du, Yucheng
Li, Yongli
Li, Hongyi
author_facet Wang, Tianning
Yang, Yunfei
Wang, Jinshu
Wu, Junshu
Sun, Lingmin
Du, Yucheng
Li, Yongli
Li, Hongyi
author_sort Wang, Tianning
collection PubMed
description A general solution-phase strategy is developed to synthesize nanostructure niobates such as MnNb(2)O(6), SnNb(2)O(6) and ZnNb(2)O(6) on natural mineral diatomite for water environmental remediation. (NH(4))(2)C(2)O(4) aqueous solution is the key to achieve a scalable and controllable synthesis of niobate/diatomite hybrid systems, which generates NH(3)·H(2)O for surface etching activation of diatomite, and H(2)C(2)O(4) for complexation dissolution of Nb(2)O(5), enabling the heterogeneous crystallization process to proceed with controllable growth kinetics. First principle calculations indicate that both niobium atom and niobium–oxygen species have the lowest adsorption energy on SiO(2) surface, and then induce the nucleating process of Nb–O–Mn (or Zn, Sn) networks. Cr(vi), Fe(iii), and Pb(ii) ions are taken as target pollutants to evaluate the water-cleaning ability of the niobate-modified diatomite. Possible mechanisms for the photoreduction of Cr(vi), physical adsorption of Fe(OH)(3) colloids, and chemisorption of Pb(ii) ions are proposed on the basis of experimentally investigations. The possibility of combining the advantages of natural mineral diatomite and nanostructured niobates provides a highly robust and potential material system with versatile functionalities of heavy metal ion removal, demonstrating great promise for a wide range of water purification.
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spelling pubmed-90604822022-05-04 A general route to modify diatomite with niobates for versatile applications of heavy metal removal Wang, Tianning Yang, Yunfei Wang, Jinshu Wu, Junshu Sun, Lingmin Du, Yucheng Li, Yongli Li, Hongyi RSC Adv Chemistry A general solution-phase strategy is developed to synthesize nanostructure niobates such as MnNb(2)O(6), SnNb(2)O(6) and ZnNb(2)O(6) on natural mineral diatomite for water environmental remediation. (NH(4))(2)C(2)O(4) aqueous solution is the key to achieve a scalable and controllable synthesis of niobate/diatomite hybrid systems, which generates NH(3)·H(2)O for surface etching activation of diatomite, and H(2)C(2)O(4) for complexation dissolution of Nb(2)O(5), enabling the heterogeneous crystallization process to proceed with controllable growth kinetics. First principle calculations indicate that both niobium atom and niobium–oxygen species have the lowest adsorption energy on SiO(2) surface, and then induce the nucleating process of Nb–O–Mn (or Zn, Sn) networks. Cr(vi), Fe(iii), and Pb(ii) ions are taken as target pollutants to evaluate the water-cleaning ability of the niobate-modified diatomite. Possible mechanisms for the photoreduction of Cr(vi), physical adsorption of Fe(OH)(3) colloids, and chemisorption of Pb(ii) ions are proposed on the basis of experimentally investigations. The possibility of combining the advantages of natural mineral diatomite and nanostructured niobates provides a highly robust and potential material system with versatile functionalities of heavy metal ion removal, demonstrating great promise for a wide range of water purification. The Royal Society of Chemistry 2019-01-29 /pmc/articles/PMC9060482/ /pubmed/35518093 http://dx.doi.org/10.1039/c8ra10186h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Wang, Tianning
Yang, Yunfei
Wang, Jinshu
Wu, Junshu
Sun, Lingmin
Du, Yucheng
Li, Yongli
Li, Hongyi
A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title_full A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title_fullStr A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title_full_unstemmed A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title_short A general route to modify diatomite with niobates for versatile applications of heavy metal removal
title_sort general route to modify diatomite with niobates for versatile applications of heavy metal removal
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9060482/
https://www.ncbi.nlm.nih.gov/pubmed/35518093
http://dx.doi.org/10.1039/c8ra10186h
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