Photocatalytic Reduction Activity of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mfenced open="{" close="}" separators="|"><mml:mrow><mml:mn mathvariant="bold">001</mml:mn></mml:mrow></mml:mfenced><mml:mo> </mml:mo><mml:mo> </mml:mo><mml:msub><mml:mrow><mml:mtext mathvariant="bold">TiO</mml:mtext></mml:mrow><mml:mrow><mml:mn mathvariant="bold">2</mml:mn></mml:mrow></mml:msub></mml:math> Codoped with F and Fe under Visible Light for Bromate Removal

Zhang, Yan; Li, Lingdan; Liu, Hongyuan

doi:10.1155/2016/5646175

Cited by 6 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The polycrystalline nature and d-spacing of the as-synthesized photocatalyst were further revealed by the complementary information from HR-TEM ( Figure 4 b,c) and its corresponding FFT ( Figure 4 d) analysis using Image J software. FFT analysis of the noise-refined TEM lattice fringe images ( Figure 5 a–c) revealed lattice spacing of 2.39 Å and 3.51 Å with an interfacial angle of 68.3° between them, which is consistent with the theoretical characteristics of the (004) and (101) lattice planes [ 29 ]. The supplementary data from EDS ( Figure 6 ) examination confirms the presence of Ti, Au, and O, which corroborates the XPS data, and confirms the assumption from the TEM analysis that Au-NPs are randomly distributed on the surface of TiO 2 NCs.…”

Section: Resultssupporting

confidence: 74%

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Usman

Cursaru

Branoiu

et al. 2022

Gels

View full text Add to dashboard Cite

A sol–gel synthesis technique was employed for the preparation of anatase phase {001}-TiO2/Au hybrid nanocomposites (NCs). The scalable, schematic, and cost-efficient method was successfully modified using HF and NH4OH capping agents. The photocatalytic activity of the as-synthesized {001}-TiO2/Au NCs were tested over 2-cycle degradation of methylene blue (MB) dye and pharmaceutical active compounds (PhACs) of ibuprofen and naproxen under direct sunlight illumination at 35 °C and 44,000 lx. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), fast Fourier transform (FFT), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) were employed for the characterization of the as-prepared sample. The characterization results from the TEM, XPS, and XRD studies established both the distribution of Au colloids on the surface of TiO2 material, and the presence of the highly crystalline structure of anatase {001}-TiO2/Au NCs. Photodegradation results from the visible light irradiation of MB indicate an enhanced photocatalytic performance of Au/TiO2 NCs over TiO2. The results from the photocatalytic activity test performed under direct sunlight exposure exhibited promising photodegradation efficiencies. In the first cycle, the sol–gel synthesized material exhibited relatively better efficiencies (91%) with the MB dye and ibuprofen, while the highest degradation efficiency for the second cycle was 79% for the MB dye. Pseudo first-order photodegradation rates from the first cycle were determined to be comparatively slower than those from the second degradation cycle.

show abstract

Section: Resultssupporting

confidence: 74%

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Usman

Cursaru

Branoiu

et al. 2022

Gels

View full text Add to dashboard Cite

show abstract

“…However, the photocatalytic activity of TiO 2 is limited by band gap and the recombination of photogenerated electron-hole pairs. The performance of TiO 2 photocatalysts can be obviously enhanced through appropriate modification, and co-doped TiO 2 usually exhibits better results of pollutants removal than singly doped TiO 2 [4,5]. In our previous work, a photocatalyst of graphene oxide (GO) and TiO 2 heterostructure doped with F (FGT) was synthesized, which exhibited a commendable reduction performance of bromate [6].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Removal of Bromate and Ibuprofen by Graphene Oxide and TiO₂ Heterostructure Doped with F: Performance and Mechanism

Zhang

Liu

2020

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

The batch experiments of photocatalytic oxidation-reduction of bromate and ibuprofen (IBP) by graphene oxide (GO) and TiO2 heterostructure doped with F (FGT) particles were conducted. The performance and mechanism of synergistic removal of bromate and IBP by FGT were discussed. The results show that a demonstrable synergistic effect and excellent removal rate of bromate and IBP by FGT were exhibited. When pH is 5.2 and the dosage of FGT is 0.1 g/L, the reaction rate constants of bromate and IBP increased from 0.0584 min-1 and 0.4188 min-1 to 0.1353 min-1 and 0.4504 min-1, respectively, compared with the degradation of bromate or IBP alone. The reaction of photocatalytic synergistic degradation is appropriately fitted through Langmuir-Hinshelwood first-order kinetics. The mechanism of synergistic removal of bromate and IBP by FGT was discussed. And electrons (e-), hydroxyl radical (⋅OH), and superoxide radical (⋅O2-) are the main active species. The electrons play a main role in the bromate reduction, and bromine is the only reduction product, while the oxidation of IBP is the result of ⋅OH and ⋅O2-, and ⋅OH plays a key role. The recombination of electrons and holes is inhibited by simultaneous consumption of bromate and IBP, which makes full use of the redox properties of FGT and plays a synergistic role in the removal of pollutants. The results indicate that photocatalytic oxidation-reduction by FGT is a promising, efficient, and environmental-friendly method for synchronous removal of combined pollution in water.

show abstract

“…Impurity doping is one of the typical approaches [4][5][6][7][8]. However, doping can usually cause high recombination rate and the low carries mobility of photoexcited electron-hole pairs and make TiO 2 thermally unstable [9].…”

Section: Introductionmentioning

confidence: 99%

Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times

Phung

Tran

Nguyen

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

MoS 2 /TiO 2 heterostructure thin films were fabricated by sol-gel and chemical bath deposition methods. Crystal structure, surface morphology, chemical states of all elements, and optical property of the obtained thin films were characterized by using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques, respectively. Photocatalytic activity of all thin films was evaluated by measuring decomposition rate of methylene blue solution under visible light irradiation. The results indicate that ultrathin MoS 2 film on TiO 2 -glass substrate improves photocatalytic activity of TiO 2 in the visible light due to the efficient absorption of visible photon of MoS 2 few layers and the transfer of electrons from MoS 2 to TiO 2 . All MoS 2 /TiO 2 heterostructure thin films exhibit higher visible light photocatalytic activity than that of pure MoS 2 and TiO 2 counterparts. The best MoS 2 /TiO 2 heterostructure thin film at MoS 2 layer deposition time of 45 minutes can decompose about 60% MB solution after 150 minutes under visible light irradiation. The mechanism of the enhancement for visible-photocatalytic activity of MoS 2 /TiO 2 heterostructure thin film was also discussed.

show abstract

Photocatalytic Reduction Activity of 001 TiO2 Codoped with F and Fe under Visible Light for Bromate Removal

Cited by 6 publications

References 25 publications

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Synergistic Removal of Bromate and Ibuprofen by Graphene Oxide and TiO₂ Heterostructure Doped with F: Performance and Mechanism

Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times

Contact Info

Product

Resources

About

Photocatalytic Reduction Activity of 001 TiO2 Codoped with F and Fe under Visible Light for Bromate Removal

Cited by 6 publications

References 25 publications

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Synergistic Removal of Bromate and Ibuprofen by Graphene Oxide and TiO2 Heterostructure Doped with F: Performance and Mechanism

Investigating Visible-Photocatalytic Activity of MoS2/TiO2 Heterostructure Thin Films at Various MoS2 Deposition Times

Contact Info

Product

Resources

About

Synergistic Removal of Bromate and Ibuprofen by Graphene Oxide and TiO₂ Heterostructure Doped with F: Performance and Mechanism

Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times