Improved photocatalytic activity of g-C3N4/TiO2 composites prepared by a simple impregnation method

Miranda, Cristian; Mansilla, Héctor D.; Yáñez, Jorge; Obregón, S.; Colón, G.

doi:10.1016/j.jphotochem.2012.12.014

Cited by 253 publications

(112 citation statements)

References 16 publications

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“…From the XPS spectra of C 1s in Figure 6c, three peaks centered at 285, 286.2, and 288.9 eV can be observed in all three samples. The main C 1s corresponds to adventitious carbon species presenting a band located at 284.4 eV [44]. The small shoulder at 286.4 and 288.9 eV could be accounted for with the C-N-C and C-(N)3 groups of g-C3N4, respectively [26,45,46].…”

Section: Phase Structures and Morphologymentioning

confidence: 93%

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Zhu

Murugananthan

et al. 2018

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Abstract:In the present study, a nanocomposite material g-C 3 N 4 /Fe-TiO 2 has been prepared successfully by a simple one-step hydrothermal process and its structural properties were thoroughly studied by various characterization techniques, such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, electron paramagnetic resonance (EPR) spectrum, X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectrometry (UV-vis DRS). The performance of the fabricated composite material towards the removal of phenol from aqueous phase was systematically evaluated by a photocatalytic approach and found to be highly dependent on the content of Fe 3+ . The optimum concentration of Fe 3+ doping that showed a dramatic enhancement in the photocatalytic activity of the composite under visible light irradiation was observed to be 0.05% by weight. The separation mechanism of photogenerated electrons and holes of the g-C 3 N 4 /Fe-TiO 2 photocatalysts was established by a photoluminescence technique in which the reactive species generated during the photocatalytic treatment process was quantified. The enhanced photocatalytic performance observed for g-C 3 N 4 -Fe/TiO 2 was ascribed to a cumulative impact of both g-C 3 N 4 and Fe that extended its spectrum-absorptive nature into the visible region. The heterojunction formation in the fabricated photocatalysts not only facilitated the separation of the photogenerated charge carriers but also retained its strong oxidation and reduction ability.

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Section: Phase Structures and Morphologymentioning

confidence: 93%

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Zhu

Murugananthan

et al. 2018

Catalysts

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“…2. Present isotherm of bare TiO 2 is assigned to type IV according to the IUPAC classification, displaying a H 2 hysteresis loop of a capillary condensation [19]. The feature of type IV isotherm is closely relevant to the presence of mesopores during aggregation of anatase nanoparticles [21,28], which is also identified by the average pore size of 3.43 nm calculated with the BJH method from adsorption data.…”

Section: Nitrogen Adsorptionmentioning

confidence: 98%

“…Several investigations have reported that composites of bulk g-C 3 N 4 and TiO 2 structures of both semiconductors are well matched and readily form heterojunction interfaces along boundaries [3,[18][19][20][21][22]. Yan et al reported that g-C 3 N 4 -TiO 2 composites prepared in a direct grind manner could catalyze hydrogen evolution under visible light [3].…”

Section: Introductionmentioning

confidence: 99%

“…Yan et al reported that g-C 3 N 4 -TiO 2 composites prepared in a direct grind manner could catalyze hydrogen evolution under visible light [3]. Miranda et al demonstrated that g-C 3 N 4 -TiO 2 composites by a simple impregnation method exhibited improved photocatalytic activity upon degradation of phenol [19]. Zhao et al indicated that g-C 3 N 4 -TiO 2 hybrid by a hydrolysis approach could efficiently remove phenol in visible light [20].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids

Chang

Zhang

Xie

et al. 2014

Applied Surface Science

190

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a b s t r a c tA series of TiO 2 hybrids composited with exfoliated g-C 3 N 4 nanosheets (CNs) were successfully synthesized through a facile sol-gel method and fully characterized by X-ray diffraction patterns (XRD), Fourier transform-infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV-vis diffuse reflectance spectra (UV-vis DRS). The CNs-TiO 2 hybrids were exposed to visible light irradiation and showed much higher catalytic capability toward degrading dye rhodamine B (RhB) comparing with bare TiO 2 and N-TiO 2 . The sample CNs-TiO 2 -0.05 exhibited the largest apparent reaction rate constant among all CNs-TiO 2 hybrids, which was 2.4 times and 7.0 times as high as bare TiO 2 and N-TiO 2 , respectively. The enhanced catalytic efficiency could be mainly attributed to the well-matched band gap structure with heterojunction interface, suitable specific surface area, and favorable optical property. In addition, active species trapping experiments were conducted, revealing that photoinduced holes (h + ) had a severe influence on catalytic outcome, through which a possible catalytic mechanism was finally realized and proposed.

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“…Nevertheless, most of these works had mainly focused on using g-C 3 N 4 /TiO 2 composite as a catalyst under visible light irradiation to produce H 2 [28,29] or to degrade common organics, such as dye [30][31][32], phenol [33,34], formaldehyde [35], or dibenzothiphene [36]. To date, there has been little research into the photocatalytic decontamination ability of g-C 3 N 4 /TiO 2 and its mineralization mechanism for EOCs in water, especially for the decomposition of pharmaceuticals.…”

Section: Introductionmentioning

confidence: 99%

Can environmental pharmaceuticals be photocatalytically degraded and completely mineralized in water using g-C3N4/TiO2 under visible light irradiation?—Implications of persistent toxic intermediates

Nie

Gao

et al. 2016

Applied Catalysis B: Environmental

162

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Improved photocatalytic activity of g-C3N4/TiO2 composites prepared by a simple impregnation method

Cited by 253 publications

References 16 publications

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids

Can environmental pharmaceuticals be photocatalytically degraded and completely mineralized in water using g-C3N4/TiO2 under visible light irradiation?—Implications of persistent toxic intermediates

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