Efficient removal of herbicide 2,4-dichlorophenoxyacetic acid from water using Ag/reduced graphene oxide co-decorated TiO2 nanotube arrays

Tang, Yanhong; Luo, Shenglian; Teng, Yarong; Liu, Chengbin; Xu, Xiangli; Zhang, Xilin; Chen, Liang

doi:10.1016/j.jhazmat.2012.09.050

Cited by 122 publications

(48 citation statements)

References 52 publications

(62 reference statements)

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“…The photogenerated electrons in the conduction band and the valence band gaps of the TiO 2 may be trapped by the iron oxide, maintaining the electron-hole separation. 55 In the charge transfer process, the 58,59 Thus, the effect of the interaction between the components of the catalyst increases the transport of electrons, prevents the recombination of charges and allows the use of visible radiation in the photodegradation of phenol.…”

Section: Determination Of Band-gap Valuesmentioning

confidence: 99%

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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A novel magnetically recoverable catalyst (Fe/MWCNT/TiO 2 -Ag) was prepared in this study by a process that involves few steps. Titanium dioxide doped with silver and iron oxide was deposited on support of multi-walled carbon nanotubes (MWCNT). The synthesized catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N 2 adsorption/desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectroscopy (IR) and UV-Vis diffuse reflectance spectra (DRS). Phenol in aqueous solution (50 mg L -1 ) was used as a model compound for evaluation of UV-Vis (filter cut off for λ > 300 nm) photocatalytic activity. The composite catalyst has a high photocatalytic activity, destroying ca. 100% of phenol and removing 85% of total organic carbon in an aqueous solution after 180 min. The Fe/MWCNT/TiO 2 -Ag catalyst remained stable, presenting an 8% decrease in phenol degradation efficiency after ten consecutive photocatalytic cycles.

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Section: Determination Of Band-gap Valuesmentioning

confidence: 99%

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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show abstract

“…The activity of TiO 2 for 2,4-D degradation was also enhanced with the addition of reduced graphene oxide and CuInS 2 [3] or Ag/reduced graphene oxide [4]. One of the reasons for higher activity on the modified TiO 2 was proposed to be caused by the higher charge separation of the TiO 2 after the modifications [3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the efficient treatment to remove 2,4-D in water still needs to be investigated. There are various methods that have been reported to degrade 2,4-D. One of the most promising methods is by photocatalytic reaction [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…As for photocatalytic degradation of 2,4-D, the most widely used photocatalysts were also TiO 2 and its modifications [2][3][4][5][6][7][8][9][10][11]. As a photocatalyst, TiO 2 has a range of useful features, including high photocatalytic activity, stability, low toxicity, ready availability and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…It was reported that the activity of commercial TiO 2 for degradation of 2,4-D was improved by binding together the pre-calcined TiO 2 in an aqueous sol of TiO 2 nanoparticles with the assistance of chitosan [2]. The activity of TiO 2 for 2,4-D degradation was also enhanced with the addition of reduced graphene oxide and CuInS 2 [3] or Ag/reduced graphene oxide [4]. One of the reasons for higher activity on the modified TiO 2 was proposed to be caused by the higher charge separation of the TiO 2 after the modifications [3][4].…”

Section: Introductionmentioning

confidence: 99%

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