Fabrication of TiO2@PANI nanobelts with the enhanced absorption and photocatalytic performance under visible light

Chen, Xi; Li, Huankun; Wu, Hanshuo; Wu, Yuxin; Shang, Yang; Pan, Jun; Xiong, Xiang

doi:10.1016/j.matlet.2016.02.134

Cited by 63 publications

(26 citation statements)

References 22 publications

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“…Furthermore, polyaniline causes the improvement of several characteristics such as high visible light absorption, mobility enhancement of charge carriers, and the ability to act as electron donor in catalyst. These were consistent with several other investigations [36,59]. Hence, virtually similar activity can be observed under both UV and visible light radiation.…”

Section: Comparison Of Different Photocatalytic Processes In Metronidsupporting

confidence: 93%

“…Photocatalysis is decreased in lower weight percentages due to lower sensitization and electron production and reduction of the synergic effect between Pani and TiO 2 . Therefore, further experiments were carried out with TiO 2 /Pani nanocomposite with weight percentage of 5% and similar findings were reported [41,58,59].…”

Section: Effect Of Nanocomposite Dose and Weight Percentage Of Anilinesupporting

confidence: 73%

“…17). After each level of degradation, the catalyst was separated by centrifugation and used for the next cycle without any purification [59]. Hence, six successive photocatalysis experiments were performed by TiO 2 /Pani.…”

Section: Mineralization Of Metronidazole and Nanocomposite Stability mentioning

confidence: 99%

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Synthesis of TiO2/polyaniline photocatalytic nanocomposite and its effects on degradation of metronidazole in aqueous solutions under UV and visible light radiation

Asgari¹,

Esrafili²,

Jafari³

et al. 2019

Desalination and Water Treatment

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TiO 2 /polyaniline (TiO 2 /Pani) nanocomposite was prepared by in situ polymerization of aniline on TiO 2 nanoparticle structures. Fourier transform infrared, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, and thermogravimetric analysis techniques were utilized to characterize the composition and structure of the nano composite and its components. All these techniques showed that TiO 2 /Pani nanocomposite was formed successfully and thus can activate by exposure to UV and visible light. The photocatalytic activity of the synthetic nanocomposite on degradation of metronidazole (MNZ) molecules in aqueous solution was investigated under UV and visible light radiation as a function of time, MNZ concentration, catalyst dose and stability, and solution pH during several steps of the degradation process. The optimal condition for maximum MNZ degradation efficiency was obtained to be 98% and 96%, respectively, with 1 g L-1 of TiO 2 /Pani nanocomposite, 10 mg L-1 of MNZ, and pH 7.0 after 120 min of exposure to UV and visible light. Kinetic studies, chemical oxygen demand, total organic carbon, average oxidation state, reusability test, and predicted degradation mechanism of the optimal condition were investigated in the present study. The photocatalytic activity of TiO 2 /Pani nanocomposite under UV and visible light radiation was higher than TiO 2 nanoparticles. The velocity constants for MNZ degradation by TiO 2 /Pani nanocomposite under UV and visible light radiations were 387 × 10-4 and 286 × 10-4 min-1 , respectively, which were approximately 1.63 and almost 95 fold over TiO 2. It was also confirmed that hydroxyl (• OH) and superoxide anion (• O 2 −) radicals, respectively, played central roles in MNZ degradation. Finally, the mechanism of increase in the photocatalytic activity was discussed. The improvement of photocatalytic activity under UV and visible light radiation was related to the remarkable absorption of UV and visible light and the reduction of recombination of the charge carriers.

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Section: Comparison Of Different Photocatalytic Processes In Metronidsupporting

confidence: 93%

Section: Effect Of Nanocomposite Dose and Weight Percentage Of Anilinesupporting

confidence: 73%

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Synthesis of TiO2/polyaniline photocatalytic nanocomposite and its effects on degradation of metronidazole in aqueous solutions under UV and visible light radiation

Asgari¹,

Esrafili²,

Jafari³

et al. 2019

Desalination and Water Treatment

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show abstract

“…Conforme ocorre diminuição da eficiência catalítica, na presença de um determinado sequestrante, é possível identificar qual espécie ativa (radicais ou buracos) possui maior contribuição na oxidação das moléculas. 6,43,54,55,76,[78][79][80][81] Substâncias como EDTA-2Na (sal disódico do ácido etilenodiaminotetraacético), trietanolamina e oxalato de amônio são comumente empregadas para sequestrar buracos, álcool terc-butílico (tBuOH) para radicais, e isopropanol e p-benzoquinona para radicais…”

Section: Polianilinaunclassified

A Polianilina No Cenário Ambiental: Uma Aborgagem Sobre Fotocatálise Heterogênea

Vargas¹,

Dalmolin²,

Pezzin³

et al. 2017

Quim. Nova

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“…Therefore, research interests in PANI and NPANI have been focused in recent years due to low cost, ease of synthesis and environmental stability [12,13]. Some applications of PANI or NPANI and their composites have been recently reported including nanobelts of TiO 2 @PANI [14], polyaniline@cadmium sulfide (PANI@CdS) core-shell nanoparticles [15], PANI/PS/Ag-NPs nanomaterials [16], polyaniline-polyurethane [17], nanostructure CuO-PANI [18] and cellulose/titanium dioxide/polyaniline (cellulose/TiO 2 /PANI) nanofibers [19].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites of nanosilica-immobilized-nanopolyaniline and crosslinked nanopolyaniline for removal of heavy metals

Mahmoud

Fekry

El-Latif

2016

Chemical Engineering Journal

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Fabrication of TiO2@PANI nanobelts with the enhanced absorption and photocatalytic performance under visible light

Cited by 63 publications

References 22 publications

Synthesis of TiO2/polyaniline photocatalytic nanocomposite and its effects on degradation of metronidazole in aqueous solutions under UV and visible light radiation

Synthesis of TiO2/polyaniline photocatalytic nanocomposite and its effects on degradation of metronidazole in aqueous solutions under UV and visible light radiation

A Polianilina No Cenário Ambiental: Uma Aborgagem Sobre Fotocatálise Heterogênea

Nanocomposites of nanosilica-immobilized-nanopolyaniline and crosslinked nanopolyaniline for removal of heavy metals

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