Flexible TiO2 nanograss array film decorated with BiOI nanoflakes and its greatly boosted photocatalytic activity

Líu, Hao; Hu, Yifei; Zhang, Yan; Ping, Xuecheng; Liu, Tongyang; Zhao, Qian; Lu, Yun; Liu, Jizi

doi:10.1016/j.ceramint.2020.11.131

Cited by 12 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pure TiO 2 NTs is a monoclinic structure based on JCPDS No. 04-009-8327 [ 42 ]. It has seven diffraction peaks at 2θ = 24.4°, 28.69°, 33.51°, 39.28°, 48.24°, 61.76°, and 69.81° as seen in Figure 1 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

et al. 2022

View full text Add to dashboard Cite

A p-n nanocomposite based on TiO2 nanotubes (NTs) and NiO nanoparticles (NPs) was designed and optimized in this study to improve the photocatalytic performance of methylene blue (MB). The hydrothermal technique has been used to produce TiO2/NiO nanocomposites with different NiO NPs weight ratios; 1TiO2:1NiO, 1TiO2:2NiO, and 1TiO2:3NiO. The crystal phase, chemical composition, optical properties, and morphology of TiO2/NiO were explored by various techniques. TiO2 NTs have a monoclinic structure, while NiO NPs have a cubic structure, according to the structural study. The bandgap of TiO2 NTs was reduced from 3.54 eV to 2.69 eV after controlling the NiO NPs weight ratio. The TiO2/2NiO nanocomposite showed the best photodegradation efficiency. Within 45 min of solar light irradiation, the efficiency of MB dye degradation using TiO2/2NiO hits 99.5% versus 73% using pure TiO2 NTs. Furthermore, the catalytic photodegradation efficiency did not deteriorate significantly even after five reusability cycles, intimating the high stability of the TiO2/2NiO nanocomposite. This suggests that the loading of NiO NPs into TiO2 NTs lowers the recombination of photo-produced electron/hole pairs and enlarged solar spectral response range, which results in improved photocatalytic activity. The mechanism of charge transfer in the TiO2/NiO and kinetic models were discussed for the photodegradation of MB.

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The three peaks formed after recombination are Ti-O (around 529.8 eV), Bi-O (around 531.1 eV), and O-H (532.3 eV) [ 41 ]. In Figure 7 e, The peak of Ti 2P 1/2 is located near 464.4 eV and Ti 2p 3/4 is located near 458.6 eV, which proves the existence of Ti 4+ [ 42 ]. After recombination, the peak of Ti 2P 1/2 shifts to the direction of higher binding energy by at most 1.3 eV, which again proves the formation of a heterojunction structure.…”

Section: Resultsmentioning

confidence: 97%

Improvement of Photocatalytic Performance by Building Multiple Heterojunction Structures of Anatase–Rutile/BiOI Composite Fibers

Li¹,

Xu²,

Zhang³

2022

Nanomaterials

View full text Add to dashboard Cite

In this study, multiple heterojunction structures of anatase–rutile/Bismuth oxyiodide (BiOI) composite fibers are designed by the combined method of electrospinning and hydrothermal techniques. The influence of different Ti/Bi atomic ratios ([Ti/Bi]) on the nanostructures and photocatalytic properties are investigated. It is found that the morphology of BiOI covered on the TiO2 fiber surface changed with [Ti/Bi] from nanosheets to submicron spheres structures. Additionally, the crystallization of the composite fibers including the phases of anatase, rutile, and BiOI is identified, theses phases are in close contact with each other, and the interfacial effects are helpful to form the multiple heterojunctions which lead to blue shifts on the chemical state of Ti. The absorption of visible light has been improved by compositing BiOI on TiO2, while the band gap values of the composite fibers are significantly reduced, which can enhance the generation and separation of electrons and holes. For the case of [Ti/Bi] = 1.57, the photodegradation rate of anatase–rutile/BiOI composite fibers is about 12 times that of pure TiO2. For the photocatalytic mechanism, the synergistic s-type heterojunctions increase the content of active oxides which have a positive effect on the degradation rate.

show abstract

“…5b, the pure TiO 2 NRA/FTO shows a weak photocurrent (curve a), and the photocurrent increases after the addition of BiOBr (curve b), indicating that the p–n heterojunction formed by the BiOBr/TiO 2 NRA is conducive to the separation of photogenerated charges. 60 Bi/BiOBr/TiO 2 NRA/FTO shows a strong photocurrent signal (curve c), which results from the combination of the SPR effect and p–n heterojunction. The formed heterojunction improves the PEC performance of Bi/BiOBr/TiO 2 NRA/FTO.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Bi/BiOBr sensitized titania nanorod arrays via a one-pot solvothermal method and construction of kanamycin photoelectrochemical aptasensors

Dong

El‐Bahy

et al. 2022

Dalton Trans.

View full text Add to dashboard Cite

show abstract

Flexible TiO2 nanograss array film decorated with BiOI nanoflakes and its greatly boosted photocatalytic activity

Cited by 12 publications

References 41 publications

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Improvement of Photocatalytic Performance by Building Multiple Heterojunction Structures of Anatase–Rutile/BiOI Composite Fibers

Preparation of Bi/BiOBr sensitized titania nanorod arrays via a one-pot solvothermal method and construction of kanamycin photoelectrochemical aptasensors

Contact Info

Product

Resources

About