Enhanced photocatalytic degradation of bisphenol A with Ag-decorated S-doped g-C3N4 under solar irradiation: Performance and mechanistic studies

Oh, Wen−Da; Lok, Li−Wen; Veksha, Andrei; Lim, Teik−Thye

doi:10.1016/j.cej.2017.09.182

Cited by 229 publications

(73 citation statements)

References 54 publications

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“…It could be considered that the Ag + was reduced by the electrons. Then, the advantage of Ag to act as an electron storage increases, minimizing the electron–hole pair recombination rate while enhancing the performance of photocatalysis …”

Section: Resultsmentioning

confidence: 99%

In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

Yin

Fang

et al. 2018

J Chinese Chemical Soc

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Carbon nitride/bismuth sulfide (C3N4/Bi2S3) nanocomposites were prepared by a facile one‐step in situ calcination method using ammonium thiocyanate and bismuth chloride as reagents. The crystal structure, composition, and morphology of the nanocomposites were characterized by X‐ray diffraction (XRD), Fourier transform infrared (FT‐IR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The photocatalytic degradation of rhodamine B (RhB) was carried out to evaluate the photocatalytic activity of the nanocomposites under visible light irradiation. The as‐prepared C3N4/Bi2S3 nanocomposites displayed enhanced visible light absorption. These photocatalysts exhibited superior photodegradation performance under visible light irradiation compared to pure C3N4. Meanwhile, the C3N4/Bi2S3 nanocomposites exhibited remarkably stable photocatalytic efficiency after five cycles of photodegradation of RhB. The C3N4/Bi2S3 heterostructure improved the separation and transfer efficiency of the photogenerated electron–hole pairs. It played an important role for the enhanced photocatalytic performance of the nanocomposite photocatalysts.

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Section: Resultsmentioning

confidence: 99%

In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

Yin

Fang

et al. 2018

J Chinese Chemical Soc

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“…g-C 3 N 4 doping is a common strategy to broaden spectral utilization and band alignment to drive separate photogenerated charge carriers. Doping by metals such as Cu and Fe [224][225][226], non-metals such as B, C, O, or S [224,[227][228][229][230][231], and co-doping [232][233][234] have all been employed for environmental depollution applications. For example, S and O co-doped g-C 3 N 4 prepared by melamine polymerization and subsequent H 2 O 2 activation prior to trithiocyanuric acid functionalization (Figure 21a) enhanced the photocatalytic degradation of RhB (Figure 21b) 6-fold relative to the parent g-C 3 N 4 nanosheet [235].…”

Section: Environmental Remediationmentioning

confidence: 99%

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

2018

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Graphitic carbon nitride (g-C 3 N 4 ) is a promising material for photocatalytic applications such as solar fuels production through CO 2 reduction and water splitting, and environmental remediation through the degradation of organic pollutants. This promise reflects the advantageous photophysical properties of g-C 3 N 4 nanostructures, notably high surface area, quantum efficiency, interfacial charge separation and transport, and ease of modification through either composite formation or the incorporation of desirable surface functionalities. Here, we review recent progress in the synthesis and photocatalytic applications of diverse g-C 3 N 4 nanostructured materials, and highlight the physical basis underpinning their performance for each application. Potential new architectures, such as hierarchical or composite g-C 3 N 4 nanostructures, that may offer further performance enhancements in solar energy harvesting and conversion are also outlined.

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“…Energy-dispersive X-ray spectroscopy (EDS) result of the selected g-C 3 N 4 /Zn 2 GeO 4 -TEOA was measured, and the main elements of Zn, Ge, O, C, and N originated from the starting materials are all distributed in g-C 3 N 4 /Zn 2 GeO 4 -TEOA composite ( Figure 4A-F). 36 The strong peaks between 1200 and 1650 cm −1 are ascribed to the stretching vibration of C-N(-C)-C connections or C-NH-C units. From the HRTEM image in Figure 4H, lattice fringes of Zn 2 GeO 4 -EG and the phase interface between g-C 3 N 4 and Zn 2 GeO 4 -EG can be clearly seen.…”

Section: Phase and Microstructure Characterizationsmentioning

confidence: 99%

“…The transmission band at about 814 cm −1 corresponds to the characteristic out of plane bending vibration of heptazine rings of the triazine units in g-C 3 N 4 . 36 The strong peaks between 1200 and 1650 cm −1 are ascribed to the stretching vibration of C-N(-C)-C connections or C-NH-C units. The broad bands at around 3150 cm −1 are indicative of N-H characteristic stretching vibrations.…”

Section: Photocatalytic Activity Evaluation and Photocurrent Measurmentioning

confidence: 99%

Effects of solvent‐induced morphology evolution of Zn₂GeO₄ on photocatalytic activities of g‐C₃N₄/Zn₂GeO₄ composites

Liu

et al. 2019

J Am Ceram Soc

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Morphology modulation of photocatalyst has been demonstrated to be a crucial strategy for improving the catalytic performance in solar energy conversion system. Here we systematically investigated the influence of the solvent-dependent morphology evolution of Zn 2 GeO 4 phase on the photocatalytic efficiency of the as-prepared g-C 3 N 4 /Zn 2 GeO 4 composites. The morphologies of Zn 2 GeO 4 were rationally tuned from flower-like nanosheets to length-controllable nanorods, and microclusters assembled from microrods through regulating the solution polarity of different organic solvents. Accordingly, the Zn 2 GeO 4 sample prepared in ethylene glycol (EG) with long rod-like morphology and integrated with g-C 3 N 4 , abbreviated as g-C 3 N 4 / Zn 2 GeO 4 (1:1)-EG, exhibited the best visible-light absorption ability and the highest efficiency. The synergetic effect of the long rod-like Zn 2 GeO 4 phase with many exposed (110) crystalline facets and g-C 3 N 4 accelerates the separation and interface transportation of photoexcited charge carriers, as confirmed by photocurrent measurements. The MB degradation mechanism was also proposed to clarify the chargetransfer process and the improved photodegradation activity. This study offers an experimental basis for understanding the significance of morphology control on rational design of photocatalysts with improved performance. K E Y W O R D Sdegradation, photocatalysis, photoreaction, Zn 2 GeO 4 6518 | PEI Et al.

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Enhanced photocatalytic degradation of bisphenol A with Ag-decorated S-doped g-C3N4 under solar irradiation: Performance and mechanistic studies

Cited by 229 publications

References 54 publications

In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

Effects of solvent‐induced morphology evolution of Zn₂GeO₄ on photocatalytic activities of g‐C₃N₄/Zn₂GeO₄ composites

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Enhanced photocatalytic degradation of bisphenol A with Ag-decorated S-doped g-C3N4 under solar irradiation: Performance and mechanistic studies

Cited by 229 publications

References 54 publications

In situ synthesis of C3N4/Bi2S3 composites with enhanced photocatalytic degradation performance under visible light irradiation

In situ synthesis of C3N4/Bi2S3 composites with enhanced photocatalytic degradation performance under visible light irradiation

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

Effects of solvent‐induced morphology evolution of Zn2GeO4 on photocatalytic activities of g‐C3N4/Zn2GeO4 composites

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In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

In situ synthesis of C₃N₄/Bi₂S₃ composites with enhanced photocatalytic degradation performance under visible light irradiation

Effects of solvent‐induced morphology evolution of Zn₂GeO₄ on photocatalytic activities of g‐C₃N₄/Zn₂GeO₄ composites