A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method

NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial sol...
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Autor*in:	Guobin Zhang [verfasserIn] Yimin Zhang [verfasserIn] Shenxu Bao [verfasserIn] Liuhong Zhang [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	NaV hydrothermal hydrogen reduction vanadium

Übergeordnetes Werk:	In: Minerals - MDPI AG, 2012, 9(2019), 5, p 271
Übergeordnetes Werk:	volume:9 ; year:2019 ; number:5, p 271

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/min9050271

Katalog-ID:	DOAJ002802414

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520			\|a NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects.
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allfields	10.3390/min9050271 doi (DE-627)DOAJ002802414 (DE-599)DOAJddaef40eb7614c3b8af81900d22d0f71 DE-627 ger DE-627 rakwb eng QE351-399.2 Guobin Zhang verfasserin aut A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects. NaV<sub<2</sub<O<sub<5</sub< hydrothermal hydrogen reduction vanadium Mineralogy Yimin Zhang verfasserin aut Shenxu Bao verfasserin aut Liuhong Zhang verfasserin aut In Minerals MDPI AG, 2012 9(2019), 5, p 271 (DE-627)689132069 (DE-600)2655947-X 2075163X nnns volume:9 year:2019 number:5, p 271 https://doi.org/10.3390/min9050271 kostenfrei https://doaj.org/article/ddaef40eb7614c3b8af81900d22d0f71 kostenfrei https://www.mdpi.com/2075-163X/9/5/271 kostenfrei https://doaj.org/toc/2075-163X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 271
spelling	10.3390/min9050271 doi (DE-627)DOAJ002802414 (DE-599)DOAJddaef40eb7614c3b8af81900d22d0f71 DE-627 ger DE-627 rakwb eng QE351-399.2 Guobin Zhang verfasserin aut A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects. NaV<sub<2</sub<O<sub<5</sub< hydrothermal hydrogen reduction vanadium Mineralogy Yimin Zhang verfasserin aut Shenxu Bao verfasserin aut Liuhong Zhang verfasserin aut In Minerals MDPI AG, 2012 9(2019), 5, p 271 (DE-627)689132069 (DE-600)2655947-X 2075163X nnns volume:9 year:2019 number:5, p 271 https://doi.org/10.3390/min9050271 kostenfrei https://doaj.org/article/ddaef40eb7614c3b8af81900d22d0f71 kostenfrei https://www.mdpi.com/2075-163X/9/5/271 kostenfrei https://doaj.org/toc/2075-163X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 271
allfields_unstemmed	10.3390/min9050271 doi (DE-627)DOAJ002802414 (DE-599)DOAJddaef40eb7614c3b8af81900d22d0f71 DE-627 ger DE-627 rakwb eng QE351-399.2 Guobin Zhang verfasserin aut A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects. NaV<sub<2</sub<O<sub<5</sub< hydrothermal hydrogen reduction vanadium Mineralogy Yimin Zhang verfasserin aut Shenxu Bao verfasserin aut Liuhong Zhang verfasserin aut In Minerals MDPI AG, 2012 9(2019), 5, p 271 (DE-627)689132069 (DE-600)2655947-X 2075163X nnns volume:9 year:2019 number:5, p 271 https://doi.org/10.3390/min9050271 kostenfrei https://doaj.org/article/ddaef40eb7614c3b8af81900d22d0f71 kostenfrei https://www.mdpi.com/2075-163X/9/5/271 kostenfrei https://doaj.org/toc/2075-163X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 271
allfieldsGer	10.3390/min9050271 doi (DE-627)DOAJ002802414 (DE-599)DOAJddaef40eb7614c3b8af81900d22d0f71 DE-627 ger DE-627 rakwb eng QE351-399.2 Guobin Zhang verfasserin aut A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects. NaV<sub<2</sub<O<sub<5</sub< hydrothermal hydrogen reduction vanadium Mineralogy Yimin Zhang verfasserin aut Shenxu Bao verfasserin aut Liuhong Zhang verfasserin aut In Minerals MDPI AG, 2012 9(2019), 5, p 271 (DE-627)689132069 (DE-600)2655947-X 2075163X nnns volume:9 year:2019 number:5, p 271 https://doi.org/10.3390/min9050271 kostenfrei https://doaj.org/article/ddaef40eb7614c3b8af81900d22d0f71 kostenfrei https://www.mdpi.com/2075-163X/9/5/271 kostenfrei https://doaj.org/toc/2075-163X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 271
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source	In Minerals 9(2019), 5, p 271 volume:9 year:2019 number:5, p 271
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author	Guobin Zhang
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topic_title	QE351-399.2 A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method NaV<sub<2</sub<O<sub<5</sub< hydrothermal hydrogen reduction vanadium
topic	misc QE351-399.2 misc NaV<sub<2</sub<O<sub<5</sub< misc hydrothermal misc hydrogen reduction misc vanadium misc Mineralogy
topic_unstemmed	misc QE351-399.2 misc NaV<sub<2</sub<O<sub<5</sub< misc hydrothermal misc hydrogen reduction misc vanadium misc Mineralogy
topic_browse	misc QE351-399.2 misc NaV<sub<2</sub<O<sub<5</sub< misc hydrothermal misc hydrogen reduction misc vanadium misc Mineralogy
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title	A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method
ctrlnum	(DE-627)DOAJ002802414 (DE-599)DOAJddaef40eb7614c3b8af81900d22d0f71
title_full	A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method
author_sort	Guobin Zhang
journal	Minerals
journalStr	Minerals
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author_browse	Guobin Zhang Yimin Zhang Shenxu Bao Liuhong Zhang
container_volume	9
class	QE351-399.2
format_se	Elektronische Aufsätze
author-letter	Guobin Zhang
doi_str_mv	10.3390/min9050271
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title_sort	novel process for the synthesis of nav<sub<2</sub<o<sub<5</sub< mesocrystals from alkaline-stripped vanadium solution via the hydrothermal hydrogen reduction method
callnumber	QE351-399.2
title_auth	A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method
abstract	NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects.
abstractGer	NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects.
abstract_unstemmed	NaV<sub<2</sub<O<sub<5</sub< mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial solution pH value, and reaction time for the pure-phase NaV<sub<2</sub<O<sub<5</sub< synthesis were ascertained to be 4 MPa, 200 °C, 4.0, and 2 h, respectively. The synthesis time (only 2 h) was greatly shortened, by nine times, compared with the most time-saving (18 h) hydrothermal process at present. X-ray diffraction (XRD) analysis revealed that the as-prepared powders demonstrated a typical layered orthorhombic structure of NaV<sub<2</sub<O<sub<5</sub<. The purity of the as-prepared NaV<sub<2</sub<O<sub<5</sub< reached up to 99.98%. An electrochemical test showed that the as-prepared NaV<sub<2</sub<O<sub<5</sub< has a potential application in sodium ion batteries. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses, the as-prepared NaV<sub<2</sub<O<sub<5</sub< powders were identified to have rod-like mesocrystals consisting of small rods which preferentially grow along the (010) direction. Furthermore, the phase transformation mechanism and crystal growth mechanism in NaV<sub<2</sub<O<sub<5</sub< preparation were discussed systematically, based on which the synthesis mechanism of NaV<sub<2</sub<O<sub<5</sub< was proposed as pentavalent vanadates pre-sedimentation, hydrogen reduction with dehydration, sodium ions insertion, and finally self-assembly oriented attachment. The synthesis process is characterized as time-saving and low-cost, and thus it may have great application prospects.
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container_issue	5, p 271
title_short	A Novel Process for the Synthesis of NaV<sub<2</sub<O<sub<5</sub< Mesocrystals from Alkaline-Stripped Vanadium Solution via the Hydrothermal Hydrogen Reduction Method
url	https://doi.org/10.3390/min9050271 https://doaj.org/article/ddaef40eb7614c3b8af81900d22d0f71 https://www.mdpi.com/2075-163X/9/5/271 https://doaj.org/toc/2075-163X
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up_date	2024-07-03T14:11:39.436Z
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