Efficient photocatalytic degradation of gaseous toluene over F-doped TiO2/exfoliated bentonite

Wang, Qi; Rhimi, Baker; Wang, Hui; Wang, Chuanyi

doi:10.1016/j.apsusc.2020.147286

Cited by 59 publications

(19 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The UV-Vis DRS result of TiO 2 /hectorite shows a intense absorption in the UV region without significant redshift and the PL spectrum shows peaks at 464 and 525 nm corresponding to Vo, which was consistent with previous studies of F-doped TiO 2 [ 15 , 16 ]. Therefore, the formation of Vo is possibly mainly related to the F-doping.…”

Section: Resultssupporting

confidence: 91%

“…Peaks of Ti 2p shift to higher binding energy in g-C 3 N 4 /TiO 2 /hectorite. Besides, the peak at 461.3 nm is attributed to the formation of Ti 3+ , which is mainly due to the reduction of T 4+ by electrons in the adjacent Vo [ 15 , 18 ]. Ti 3+ is generally considered to be favorable to photocatalysis.…”

Section: Resultsmentioning

confidence: 99%

“…Ti 3+ is generally considered to be favorable to photocatalysis. Combined with PL analysis, it can be known that the surface adsorption of fluorine causes the generation of Vo and Ti 3+ (Equation (3)) [ 15 ].

…”

Section: Resultsmentioning

confidence: 99%

“…The positive shift of O 1s and Ti 2p with the negative shift of C 1s and N 1s suggests that the electrons transfer from TiO 2 to g-C 3 N 4 . The higher binding energy of Ti 2p 3/2 (458.8 eV), Ti 2p 1/2 (464.5 eV) and Ti-O (530.0 eV) of TiO 2 /hectorite compared with pure TiO 2 (458.4, 464.1 and 529.8 eV) might indicates the electronic migration between TiO 2 and hectorite owing to the formation of the Ti-O-Si bond [ 15 , 47 ]. This suggests that hectorite benefit the separation of the e − -h + pairs.…”

Section: Resultsmentioning

confidence: 99%

“…However, due to the wide band gap of TiO 2 , TiO 2 /hectorite composites are considered to only have efficient photo-catalytic activity in ultraviolet light. It has been reported that F ion doped in TiO 2 can cause the generation of Vo and Ti 3+ , which makes TiO 2 respond to visible light [ 15 , 16 , 17 , 18 ]. Therefore, it is possible that the F element from synthetic hectorite introduces Vo and Ti 3+ into TiO 2 by combining TiO 2 with hectorite and making it exhibit photocatalytic ability under visible light.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

et al. 2020

View full text Add to dashboard Cite

A novel g-C3N4/TiO2/hectorite Z-scheme composites with oxygen vacancy (Vo) defects and Ti3+ were synthesized by so-gel method and high temperature solid phase reaction. This composite exhibited high visible photo-catalytic degradation of rhodamine B (RhB). The apparent rate constant of g-C3N4/TiO2/hectorite was 0.01705 min−1, which is approximately 5.38 and 4.88 times that of P25 and g-C3N4, respectively. The enhancement of photo-catalytic efficiency of the composites can be attributed to the great light harvesting ability, high specific surface area and effective separation of electrons(e−) and holes(h+). The F element from Hectorite causes the formation of Vo and Ti3+ in TiO2, making it responsive to visible light. The effective separation of e− and h+ mainly results from Z-scheme transfer of photo-produced electrons in g-C3N4/TiO2 interface. The composites can be easily recycled and the degradation rate of the RhB still reached 84% after five cycles, indicating its good reusability.

show abstract

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

et al. 2020

View full text Add to dashboard Cite

show abstract

Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment

Pham

Bui

Le³

et al. 2023

Chem Eng & Technol

View full text Add to dashboard Cite

N–F‐codoped TiO2 materials were successfully fabricated by a hydrothermal method without any capping agent and further heat treatment. The results indicate interstitial N3− ion doping and the surface‐adsorbed F− ion on the TiO2 surface. By introducing N and F into the TiO2 lattice, the band gap of the obtained material is significantly reduced compared to the undoped TiO2. Moreover, the light absorption ability of the material was demonstrated to extend to visible light regions, contributing to the better photocatalytic activity. Furthermore, the sample with the NH4F/TiCl4 precursor molar ratio of 2:1 displayed the greatest photocatalytic activity with visible radiation. This study provides a new pathway to synthesize a novel photocatalyst having great potential for future applications.

show abstract

Progress on the nanoscale spherical TiO₂ photocatalysts: Mechanisms, synthesis and degradation applications

et al. 2020

View full text Add to dashboard Cite

Titanium dioxide (TiO2) has the advantages of strong photocatalytic activity, non‐toxicity, and low cost, and so on. It has always occupied a dominant position in many photocatalytic materials, especially nanoscale spherical TiO2 has the characteristics of high specific surface area and pore‐volume, and so on. Therefore, Degussa P25, as a typical representative of the nanoscale spherical structure, is currently the only material produced on a large scale. According to the structure, nanoscale spherical TiO2 can be divided into three types: solid, core‐shell, and hollow spheres. However, there is still a lack of the latest review on the synthetic doping and application of nanoscale spherical TiO2. Therefore, we first describe the degradation mechanism of nanoscale spherical TiO2 and summarize the latest progress of its synthesis strategy in this review, including doping and other modification techniques, and finally introduce the application of nanoscale spherical TiO2 photocatalytic degradation of volatile organic compounds, dye wastewater, antibiotics, pesticides, and oily wastewater. Through this review, it is helpful for researchers to further understand the synthesis and application of nanoscale spherical TiO2, hoping to continuously improve the disadvantages and photocatalytic activity of nanoscale spherical TiO2, and promote the widespread application of nanoscale spherical TiO2 on an industrial scale.

show abstract

Efficient photocatalytic degradation of gaseous toluene over F-doped TiO2/exfoliated bentonite

Cited by 59 publications

References 74 publications

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment

Progress on the nanoscale spherical TiO₂ photocatalysts: Mechanisms, synthesis and degradation applications

Contact Info

Product

Resources

About

Efficient photocatalytic degradation of gaseous toluene over F-doped TiO2/exfoliated bentonite

Cited by 59 publications

References 74 publications

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

Facile Synthesis of g-C3N4/TiO2/Hectorite Z-Scheme Composite and Its Visible Photocatalytic Degradation of Rhodamine B

Visible Light‐Driven N–F‐Codoped TiO2 for Photocatalysts as Potential Application to Wastewater Treatment

Progress on the nanoscale spherical TiO2 photocatalysts: Mechanisms, synthesis and degradation applications

Contact Info

Product

Resources

About

Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment

Progress on the nanoscale spherical TiO₂ photocatalysts: Mechanisms, synthesis and degradation applications