In situ X-ray diffraction study of the hydrothermal crystallization of hierarchical Bi2WO6 nanostructures

Zhou, Ying; Antonova, E. A.; Bensch, Wolfgang; Patzke, Greta R.

doi:10.1039/c0nr00340a

Cited by 41 publications

(47 citation statements)

References 52 publications

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“…During the last few years, many different systems, such as thioantimonates, thiostannates, or metal‐organic frameworks, were successfully investigated by this method and provided interesting results 2. 8, 9, 13–20, 47–52…”

Section: Resultsmentioning

confidence: 99%

Controlling Nucleation and Crystal Growth of a Distinct Polyoxovanadate Cluster: An In Situ Energy Dispersive X‐ray Diffraction Study under Solvothermal Conditions

Antonova

Seidlhofer

Wang

et al. 2012

Chemistry A European J

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The formation of the antimonato polyoxovanadates [V(14)Sb(8)(C(6)H(15)N(3))(4)O(42)(H(2)O)]·4H(2)O (1), (C(6)H(17)N(3))(2)[V(15)Sb(6)(C(6)H(15)N(3))(2)O(42)(H(2)O)]·2.5H(2)O (2), {C(6)H(15)N(3)}(4)[V(16)Sb(4)O(42)]2H(2)O (3) (C(6)H(15)N(3)=1-(2-aminoethyl)piperazine, AEP) has been studied under solvothermal conditions by using in situ energy dispersive X-ray diffraction (EDRXD). The syntheses were performed with an identical ratio for Sb(2)O(3) and NH(4)VO(3). If the reactions slurries are not stirred during the solvothermal reaction and by applying 70-75% amine concentration, the products contain all three compounds, whereas 3 is observed at 80%. Under stirring conditions, variation of the concentration of AEP led to crystallization of the three different compounds at distinct concentrations, that is, 1 is formed at 75%, 1 and 2 between 75 and 80% and 3 at 80%. At an amine concentration of 77.5%, first reflections of 2 occurred and at later stages, compound 1 started to crystallize. The sample with the lowest number of V(IV) species was formed at the lowest amine concentration, whereas crystallization of 3 required the highest concentration. The formation of the compounds occurred without crystalline intermediates and/or precursors. With increasing reaction temperature, the incubation time was significantly reduced.

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Section: Resultsmentioning

confidence: 99%

Controlling Nucleation and Crystal Growth of a Distinct Polyoxovanadate Cluster: An In Situ Energy Dispersive X‐ray Diffraction Study under Solvothermal Conditions

Antonova

Seidlhofer

Wang

et al. 2012

Chemistry A European J

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“…In comparison with the results of crystallisation studies on other hybrid compounds 35,36,37,38 as well as inorganic materials 39,40,41,42 the rate constants and coefficients are not drastically different. Thus the in situ oxidation of Mn 2+ does not result in uncommon crystallisation kinetics.…”

mentioning

confidence: 93%

Formation and characterisation of Mn-MIL-100

2013

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The synthesis and characterisation of the Mn-based analogue of the MIL-100-framework is reported. The 5 title compound is synthesised from a methanolic solution of trimesic acid and manganese(II) nitrate in very short reaction times. During the reaction, the Mn 2+ -ions are oxidized in-situ to Mn 3+ -ions. The obtained MOF was characterised by XRPD-measurements, IR-spectroscopy, thermogravimetric measurements and sorption experiments. To have a closer look at the crystallisation occurring after the in situ metal oxidation-reaction that results in the formation of the title compound, in-situ EDXRPD-10 experiments under solvothermal conditions were carried out. These time-resolved measurements could be evaluated by two different kinetic models (by Avrami and Gualtieri) for crystallisation. The results indicate a two stage reaction process, which are dominated by different reaction mechanisms.

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“…Among them, Bi 3.84 W 0.16 O 6.24 , as one of the bismuth tungsten complex oxides, has drawn enormous attention. Up to date, there have been a few investigations about Bi 3.84 W 0.16 O 6.24 as a photocatalyst (Wang et al 2011a, b;Chen et al 2013;Yao et al 2009;Zhou et al 2010), which are mainly focused upon the effects of pH values of the precursor solutions on the crystal phase of Bi 3.84 W 0.16 O 6.24 . It is wholly affirmed that the dominant crystal can be transferred from Bi 2 WO 6 to Bi 3.84 W 0.16 O 6.24 by changing the pH value from acid to alkalescence.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of visible-light-driven hierarchical Bi3.84W0.16O6.24 photocatalysts toward efficient degradation of methyl orange

et al. 2015

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In the work, visible-light-driven hierarchical Bi 3.84 W 0.16 O 6.24 photocatalysts have been synthesized by a facile hydrothermal strategy. The microstructures and photocatalytic activities of Bi 3.84 W 0.16-O 6.24 photocatalysts were finely tuned just by adjusting the pH values of reaction solutions with different alkalis. The as-prepared samples were physically characterized by X-ray powder diffraction, fieldemission scanning electron microscopy, and ultraviolet-visible diffraction reflection spectroscopy. When evaluated by the photocatalytic degradation of methyl orange (MO) under the visible-light irradiation, Bi 3.84 W 0.16 O 6.24 samples with distinct micro-structures showed different photocatalytic activities. Of Note, the hierarchical Bi 3.84 W 0.16 O 6.24 sub-microspheres constructed by nanoflake building blocks demonstrated the highest photocatalytic activity for the degradation of MO under the visible-light irradiation.

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In situ X-ray diffraction study of the hydrothermal crystallization of hierarchical Bi2WO6 nanostructures

Cited by 41 publications

References 52 publications

Controlling Nucleation and Crystal Growth of a Distinct Polyoxovanadate Cluster: An In Situ Energy Dispersive X‐ray Diffraction Study under Solvothermal Conditions

Controlling Nucleation and Crystal Growth of a Distinct Polyoxovanadate Cluster: An In Situ Energy Dispersive X‐ray Diffraction Study under Solvothermal Conditions

Formation and characterisation of Mn-MIL-100

Hydrothermal synthesis of visible-light-driven hierarchical Bi3.84W0.16O6.24 photocatalysts toward efficient degradation of methyl orange

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