A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

Abstract The development of heterojunctions is the current focus of the scientific community as these materials are visible light active and the staggered positioning of their band edges combats electron-hole recombination which is the downside of most photocatalysts. In this work, a two- step hydro...

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Autores principales:	Philani Vusumuzi Hlophe, Lwazi Charles Mahlalela, Langelihle Nsikayezwe Dlamini
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cb4e7f4adfa9434b9355456d1fe2d447
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spelling	oai:doaj.org-article:cb4e7f4adfa9434b9355456d1fe2d4472021-12-02T15:08:59ZA composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization10.1038/s41598-019-46498-w2045-2322https://doaj.org/article/cb4e7f4adfa9434b9355456d1fe2d4472019-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-46498-whttps://doaj.org/toc/2045-2322Abstract The development of heterojunctions is the current focus of the scientific community as these materials are visible light active and the staggered positioning of their band edges combats electron-hole recombination which is the downside of most photocatalysts. In this work, a two- step hydrothermal synthesis protocol was utilized to fabricate a novel observable-light active material, composed of platelet-like BiVO4 and a titanium-based metal organic framework (MOF) called MIL-125(Ti). The tuning of specific morphologies, such as platelet-like in BiVO4, provides the exposure of most reactive facets which are more reactive towards photooxidation of organics in water, thus increasing their efficiency. The as-synthesized heterojunction was characterized by Transmission electron microscopy (TEM), scanning transmission microscopy (SEM), X-Ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), X-Ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectra. The formation of the heterojunction lead to a positive shift of the 3-2 Bi:Ti valence band (VB) (1.78 eV) when compared to 1.27 eV VB position of BiVO4. The PL and photoelectrochemical measurements revealed that the heterojunction photocatalyst designated 3-2 Bi-Ti demonstrated inhibited recombination rate (platelet-like BiVO4 > 3-2 Bi:Ti (PM) > MIL-125 > 1–1 Bi:Ti > 2–3 Bi:Ti > 3-2 Bi:Ti) and highly efficient interfacial charge shuttle between platelet-like BiVO4 and MIL-125(Ti) through the formed n-n junction.Philani Vusumuzi HlopheLwazi Charles MahlalelaLangelihle Nsikayezwe DlaminiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Philani Vusumuzi Hlophe Lwazi Charles Mahlalela Langelihle Nsikayezwe Dlamini A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
description	Abstract The development of heterojunctions is the current focus of the scientific community as these materials are visible light active and the staggered positioning of their band edges combats electron-hole recombination which is the downside of most photocatalysts. In this work, a two- step hydrothermal synthesis protocol was utilized to fabricate a novel observable-light active material, composed of platelet-like BiVO4 and a titanium-based metal organic framework (MOF) called MIL-125(Ti). The tuning of specific morphologies, such as platelet-like in BiVO4, provides the exposure of most reactive facets which are more reactive towards photooxidation of organics in water, thus increasing their efficiency. The as-synthesized heterojunction was characterized by Transmission electron microscopy (TEM), scanning transmission microscopy (SEM), X-Ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), X-Ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectra. The formation of the heterojunction lead to a positive shift of the 3-2 Bi:Ti valence band (VB) (1.78 eV) when compared to 1.27 eV VB position of BiVO4. The PL and photoelectrochemical measurements revealed that the heterojunction photocatalyst designated 3-2 Bi-Ti demonstrated inhibited recombination rate (platelet-like BiVO4 > 3-2 Bi:Ti (PM) > MIL-125 > 1–1 Bi:Ti > 2–3 Bi:Ti > 3-2 Bi:Ti) and highly efficient interfacial charge shuttle between platelet-like BiVO4 and MIL-125(Ti) through the formed n-n junction.
format	article
author	Philani Vusumuzi Hlophe Lwazi Charles Mahlalela Langelihle Nsikayezwe Dlamini
author_facet	Philani Vusumuzi Hlophe Lwazi Charles Mahlalela Langelihle Nsikayezwe Dlamini
author_sort	Philani Vusumuzi Hlophe
title	A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
title_short	A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
title_full	A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
title_fullStr	A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
title_full_unstemmed	A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization
title_sort	composite of platelet-like orientated bivo4 fused with mil-125(ti): synthesis and characterization
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/cb4e7f4adfa9434b9355456d1fe2d447
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A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

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