Synthesis of fluorinated TiO2 hollow microspheres and their photocatalytic activity under visible light

Li, Junqi; Wang, Defang; Liu, Hui; He, Zuoli; Zhu, Zhiliang

doi:10.1016/j.apsusc.2011.01.130

Cited by 24 publications

(5 citation statements)

References 29 publications

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“…Starting with TiO 2 , anion doping of TiO 2 -based photocatalysts (e.g., with F – , N 3– , and S 2– ) has been demonstrated to result in improved photocatalytic activity. − As shown by Junqi et al in 2011, among these non-metal dopants, fluorine incorporation into the TiO 2 lattice reduced hole trapping at the TiO 2 /electrolyte interface presumably as a result of the strong electronegativity of surface-bound fluorine. As a result, the photocatalytic performance regarding the oxidative degradation of methyl orange was enhanced after fluorination.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Rohloff

Anke

Kasian

et al. 2019

ACS Appl. Mater. Interfaces

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Anion substitution is an emerging strategy to enhance the photoelectrochemical performance of metal oxide photoelectrodes. In the present work, we investigate the effect of fluorine incorporation on the photoelectrochemical water oxidation performance of BiVO4 and Mo:BiVO4 thin film photoanodes. The BiVO4 and Mo:BiVO4 thin film photoanodes were prepared by a straightforward organometallic solution route involving dip coating and subsequent calcination in air. Fluorine modification was realized by applying a soft and low-cost solid–vapor reaction route involving fluorine-containing polymers and an inert gas atmosphere leading to novel F:BiVO4 and F/Mo:BiVO4 thin film photoanodes with substantially increased photoelectrochemical water oxidation properties. Deposition of the cobalt phosphate (CoPi) water oxidation catalyst allowed further enhancement of the photoelectrochemical performance. While Mo doping mainly improves light-harvesting, charge transport, and charge separation efficiencies, F modification was demonstrated to primarily affect the charge transfer efficiency at the semiconductor–electrolyte interface, thereby leading to a photocurrent increase of 40 and 21% upon fluorination of the BiVO4 and Mo:BiVO4 photoanodes, respectively, and an applied bias photon-to-current efficiency increase of 35 and 5%, respectively. We thereby could demonstrate that cation and anion co-doping in BiVO4 as demonstrated for Mo and F allows combining the photoelectrochemically relevant benefits associated with each type of dopant.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Rohloff

Anke

Kasian

et al. 2019

ACS Appl. Mater. Interfaces

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“…Further, these ZnO‐TiO 2 nanosphere were extensive explored as energy harvesting semiconductor metal oxide, The third‐generation solar cell, dye sensitized solar cells (DSSC) is simple, fast developing and cost‐efficient solar cell which has attracted many attention for energy harvesting . As reported in our recent study, high photoconversion efficiency was achieved by solid ZnO‐TiO 2 nanosphere on varying ZnO doping percentage along with the use of Pt as counter electrode .…”

Section: Resultsmentioning

confidence: 99%

“…The synthesized material have been consequently used for applications like dye degradation and DSSC, to fully understand and explore the properties of ZnO‐TiO 2 heterostructure. Heterogeneous catalyst has been earlier reported in the literature to have property for remediation of waste water pollutants ,. This study, however, aims at using the ZnO‐TiO 2 nanosphere as a potential candidate in a nanoparticle‐assisted membrane‐based purification process for degrading water contaminants significantly.…”

Section: Introductionmentioning

confidence: 99%

“…Heterogeneous catalyst has been earlier reported in the literature to have property for remediation of waste water pollutants. [32,33] This study, however, aims at using the ZnO-TiO 2 nanosphere as a potential candidate in a nanoparticle-assisted membrane-based purification process for degrading water contaminants significantly. The membrane having porous structure along with the nano-spherical heterojunction photocatalyst traps lights better alleviating the degradation efficiency of harmful contaminants such as methyl orange (MO) and Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

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Engineered ZnO‐TiO₂ Nanospheres for High Performing Membrane Assimilated Photocatalytic Water Remediation and Energy Harvesting

et al. 2018

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This paper is a study of ZnO doped TiO2 in various percentages ranging from 0% (undoped) up to 10%. The effect of doping was observed via the change in morphological, optical, electrical and physical properties of ZnO‐TiO2 nanospheres. Hydrothermally grown nanospheres are used for removing contaminants photo‐catalytically from waste water and also as photoanodes in dye‐sensitized solar cells (DSSCs) with graphene as counter electrode. Of the many approaches that have been explored for purification of contaminated water, this work presents designing of an environmental friendly solution, based on easily available filter paper membrane and incorporating it with the synthesized catalyst for photodegradation of the harmful toxic substances. These reusable membranes assist in the photodegradation process by creating room for better light‐catalyst‐dye interaction via large surface sites. The spherically structured heterojunction of ZnO‐TiO2 generates excitons that oxidize methyl orange (MO) and reduce harmful Cr(VI) to non‐toxic Cr(III) with high efficacy. Additionally, the agile nanostructures were employed as efficient photoanode material by fabricating dye sensitized solar cells with graphene as counter electrode.

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“…Surface fluorination of TiO 2 on PVDF also indicated a potential application for the photomethanation of CO 2 , since fluorination of TiO 2 has been reported to have an enhanced photocatalytic effect. 8,26,[50][51][52][53] Photomethanation Photoluminescence (PL) results from the recombination of photogenerated electrons and holes showed a higher intensity of PL spectra which reflects a higher rate of recombination. Therefore, PL spectra are often used to examine the efficiency of charge carrier trapping, migration and transfer.…”

Section: Morphological Aspectsmentioning

confidence: 99%

Growth of crystallized titania from the cores of amorphous tetrabutyl titanate@PVDF nanowires

et al. 2012

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Novel crystallized rutile TiO 2 with microstructures ranging from dendrite-like and leaf-like to flowerlike are fabricated through the autoclaving of amorphous tetrabutyl titanate (TBT) which assembles in the cores of electrospun PVDF nanowires. The microstructures and properties of these materials are determined through a combination of XRD, XPS, SEM and EDS/TEM studies. The nucleation of rutile nanocrystallites is accomplished through the formation of F atom-substituted soluble TiO 6 complexes with Ti-F bonding. The growth of TiO 2 is catalyzed by H 2 O in the hydrothermal solution. The fabricated TiO 2 -PVDF membranes undergo efficient photomethanation conversion (about 36-fold higher than commercial P25) even for the first six hours under UV illumination, as well as having high stability. The F atoms from the PVDF and the effect of the TiO 2 microstructures play a significant role in the corresponding photomethanation ability which can be elucidated from the photoluminescence (PL) studies.

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Synthesis of fluorinated TiO2 hollow microspheres and their photocatalytic activity under visible light

Cited by 24 publications

References 29 publications

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Engineered ZnO‐TiO₂ Nanospheres for High Performing Membrane Assimilated Photocatalytic Water Remediation and Energy Harvesting

Growth of crystallized titania from the cores of amorphous tetrabutyl titanate@PVDF nanowires

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Synthesis of fluorinated TiO2 hollow microspheres and their photocatalytic activity under visible light

Cited by 24 publications

References 29 publications

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO4 and Mo:BiVO4 Thin Film Photoanodes

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO4 and Mo:BiVO4 Thin Film Photoanodes

Engineered ZnO‐TiO2 Nanospheres for High Performing Membrane Assimilated Photocatalytic Water Remediation and Energy Harvesting

Growth of crystallized titania from the cores of amorphous tetrabutyl titanate@PVDF nanowires

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Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Enhanced Photoelectrochemical Water Oxidation Performance by Fluorine Incorporation in BiVO₄ and Mo:BiVO₄ Thin Film Photoanodes

Engineered ZnO‐TiO₂ Nanospheres for High Performing Membrane Assimilated Photocatalytic Water Remediation and Energy Harvesting