2D-montmorillonite-dispersed g-C3N4/TiO2 2D/0Dnanocomposite for enhanced photo-induced H2 evolution from glycerol-water mixture

Fajrina, Nur; Tahir, Muhammad Nawaz

doi:10.1016/j.apsusc.2018.12.076

Cited by 81 publications

(30 citation statements)

References 61 publications

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“…As shown in the spectrum of F 1s for TiO 2 /hectorite (Figure 6b), a peak appears at 685.2 nm, which is related to the physical surface adsorption of F [17]. According to the spectrum of C1s (Figure 6c), the peaks at around 288.1 and 284.6 eV are assigned to sp 2 hybridized C(-N-C=N) of g-C 3 N 4 and exogenous sp 2 hybridized C, respectively [28,29]. As for g-C 3 N 4 /TiO 2 /hectorite, the peaks shift to lower energy region.…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 95%

“…It is known that higher binding energy means lower electron density [28,47]. 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 .…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

“…However, its photo-catalytic efficiency is limited by limited separation efficiency of photogenic electrons and holes, narrow spectral response, low surface area and so on [23][24][25]. Recently, the hetero-junction catalyst g-C 3 N 4 /TiO 2 has been studied for the promoted separation efficiency of photogenic e − and h + due to the well matched energy structure [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 95%

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…The electron cloud density decreases with the binding energy [40,41]. Compared with pure TiO 2 (458.4 and 464.1 eV), the binding energy of Ti 2p 3/2 (458.8 eV) and Ti 2p 1/2 (464.6 eV) of TH-2 is much higher, which should be the formation of the Ti-O-Si bond between TiO 2 and hectorite [35,41,42].…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 94%

One-Pot Synthesis of TiO2/Hectorite Composite and Its Photocatalytic Degradation of Methylene Blue

et al. 2022

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TiO2/hectorite composite photocatalysts with different molar ratios of lithium, magnesium, and silicon were synthesized by a one-pot hydrothermal method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption isotherms, and ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS). When the molar ratio of lithium, magnesium, and silicon was 1.32:5.34:8 (TH-2), the composite showed the highest UV photocatalytic degradation of methylene blue (MB). The apparent rate constant of TH-2 was 0.04361 min−1, which was about 3.12 times that of EVONIK Degussa commercial TiO2 of AEROXIDE P25. The improvement of photocatalytic efficiency of the composite was mainly due to its high specific surface area, light trapping ability, and effective separation of electrons (e−) and holes (h+). At the same time, the F element of hectorite is beneficial to the formation of Ti3+ in TiO2, thus enhancing the photocatalytic activity. After five cycles, the removal rate of MB with TH-2 still reached 87.9%, indicating its excellent reusability.

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“…Therefore, cocatalysts play an important role in improving the performance of photocatalytic H2 evolution. Until now, a large number of strategies were developed to modify semiconductor photocatalysts by cocatalysts, such as Type I heterojunction [69,70], Type II heterojunction [61], p-n heterojunction [62,71,72], Schottky-junction [73,74], Z-scheme heterojunction [75][76][77][78] and S-scheme heterojunction [14], which have been widely designed to form build-in electric field for boosting the charge carrier separation, thus achieving improved photocatalytic hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

The roles and mechanism of cocatalysts in photocatalytic water splitting to produce hydrogen

Xiao

et al. 2020

Chinese Journal of Catalysis

198

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2D-montmorillonite-dispersed g-C3N4/TiO2 2D/0Dnanocomposite for enhanced photo-induced H2 evolution from glycerol-water mixture

Cited by 81 publications

References 61 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

One-Pot Synthesis of TiO2/Hectorite Composite and Its Photocatalytic Degradation of Methylene Blue

The roles and mechanism of cocatalysts in photocatalytic water splitting to produce hydrogen

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