Fluorine doped anatase TiO 2 with exposed reactive (001) facets supported on porous diatomite for enhanced visible-light photocatalytic activity

Li, Chunquan; Sun, Zhiming; Ma, Ronghua; Xue, Yanlei; Zheng, Shuilin

doi:10.1016/j.micromeso.2017.02.053

Cited by 64 publications

(17 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike nitrogen, fluorine atoms easily replace oxygen due to the close ion radius (1.33 Å for F − and 1.4 Å for O 2− ). The increase in photocatalytic activity is mainly associated with an improvement in the degree of crystallinity of TiO 2 due to doping with fluorine [ 32 ]. It has been determined that crystallinity and the specific surface area also affect the photoactivity of TiO 2 [ 33 , 34 ].…”

Section: Factors Affecting the Efficiency Of Photocatalysis And Tementioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

View full text Add to dashboard Cite

The growth of industrialization, which is forced to use non-renewable energy sources, leads to an increase in environmental pollution. Therefore, it is necessary not only to reduce the use of fossil fuels to meet energy needs but also to replace it with cleaner fuels. Production of hydrogen by splitting water is considered one of the most promising ways to use solar energy. TiO2 is an amphoteric oxide that occurs naturally in several modifications. This review summarizes recent advances of doped TiO2-based photocatalysts used in hydrogen production and the degradation of organic pollutants in water. An intense scientific and practical interest in these processes is aroused by the fact that they aim to solve global problems of energy conservation and ecology.

show abstract

Section: Factors Affecting the Efficiency Of Photocatalysis And Tementioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…O 1 s XPS line of Ag-TiO 2 /H 3 PW 12 O 40 composite film exhibited three peaks at 529.5 eV, 531.6 eV and 532.9 eV, originating from lattice oxygen species of TiO 2 , Keggin unit and adsorbed oxygen, respectively 44 , 45 . Thus, it can be concluded that (1) according to the location of Ti 2p 3/2 and Ti 2p 1/2 , TiO 2 was in anatase phase in Ag-TiO 2 /H 3 PW 12 O 40 composite film 46 ; (2) compared with pure TiO 2 and H 3 PW 12 O 40 , both Ti 2p and W 4 f XPS lines of Ag-TiO 2 /H 3 PW 12 O 40 composite film shifted toward low values, implying the formation of (≡Ti-OH 2 ) n + [H 3-n PW 12 O 40 ] n between Keggin unit and TiO 2 support via Ti-O-W bond 12 ; (3) the introduction of metallic Ag was confirmed by a spin energy separation of 6.0 eV 47 , since under heating parent AgNO 3 was decomposed gradually into metallic Ag that tended to aggregate to form nanocrystals, as the following reactions 48 : …”

Section: Resultsmentioning

confidence: 95%

Design of plasmonic Ag-TiO2/H3PW12O40 composite film with enhanced sunlight photocatalytic activity towards o-chlorophenol degradation

Lü

Wang

Ning

et al. 2017

Sci Rep

View full text Add to dashboard Cite

A series of plasmonic Ag-TiO2/H3PW12O40 composite films were fabricated and immobilized by validated preparation technique. The chemical composition and phase, optical, SPR effect and pore-structure properties together with the morphology of as-prepared composite film are well-characterized. The multi-synergies of as-prepared composite films were gained by combined action of electron-capture action via H3PW12O40, visible-response induced by Ag, and Schottky-junction formed between TiO2-Ag. Under simulated sunlight, the maximal K app of o-chlorophenol (o-CP) reached 0.0075 min−1 which was 3.95-fold larger than that of TiO2 film, while it was restrained obviously under acid condition. In the photocatalytic degradation process, ·OH and ·O2 − attacked preferentially ortho and para position of o-CP molecule, and accordingly the specific degradation pathways were speculated. The novel composite film exhibited an excellent applicability due to self-regeneration of H3PW12O40, well-protection of metal Ag° and favorable immobilization.

show abstract

“…The Ti 3+ ions suppress the recombination rate of photogenerated charge carriers, thereby enhancing photocatalytic activity. The substitution of fluorine for oxygen in the titania lattice gives rise to a dramatic increase in oxygen vacancy concentrations [175,267]. The visible-light photocatalytic activity of F-doped TiO 2 can be further enhanced by co-doping with N [268].…”

Section: Non-metal Dopingmentioning

confidence: 99%

Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties

2020

View full text Add to dashboard Cite

This article provides an overview of current research into the development, synthesis, photocatalytic bacterial activity, biocompatibility and cytotoxic properties of various visible-light active titanium dioxide (TiO2) nanoparticles (NPs) and their nanocomposites. To achieve antibacterial inactivation under visible light, TiO2 NPs are doped with metal and non-metal elements, modified with carbonaceous nanomaterials, and coupled with other metal oxide semiconductors. Transition metals introduce a localized d-electron state just below the conduction band of TiO2 NPs, thereby narrowing the bandgap and causing a red shift of the optical absorption edge into the visible region. Silver nanoparticles of doped TiO2 NPs experience surface plasmon resonance under visible light excitation, leading to the injection of hot electrons into the conduction band of TiO2 NPs to generate reactive oxygen species (ROS) for bacterial killing. The modification of TiO2 NPs with carbon nanotubes and graphene sheets also achieve the efficient creation of ROS under visible light irradiation. Furthermore, titanium-based alloy implants in orthopedics with enhanced antibacterial activity and biocompatibility can be achieved by forming a surface layer of Ag-doped titania nanotubes. By incorporating TiO2 NPs and Cu-doped TiO2 NPs into chitosan or the textile matrix, the resulting polymer nanocomposites exhibit excellent antimicrobial properties that can have applications as fruit/food wrapping films, self-cleaning fabrics, medical scaffolds and wound dressings. Considering the possible use of visible-light active TiO2 nanomaterials for various applications, their toxicity impact on the environment and public health is also addressed.

show abstract

Fluorine doped anatase TiO 2 with exposed reactive (001) facets supported on porous diatomite for enhanced visible-light photocatalytic activity

Cited by 64 publications

References 33 publications

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Design of plasmonic Ag-TiO2/H3PW12O40 composite film with enhanced sunlight photocatalytic activity towards o-chlorophenol degradation

Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties

Contact Info

Product

Resources

About