Synergetic effect of g-C3N4/ZnO binary nanocomposites heterojunction on improving charge carrier separation through 2D/1D nanostructures for effective photocatalytic activity under the sunlight irradiation

Kumaresan, N.; Sinthiya, M. Maria Angelin; Sarathbavan, M.; Ramamurthi, K.; Sethuraman, K.; Babu, R. Ramesh

doi:10.1016/j.seppur.2019.116356

Cited by 63 publications

(37 citation statements)

References 46 publications

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“…46 The absorption peak between 1650 and 1200 cm À1 can be expressed as the stretching vibration peak of triazine ring structure skeleton. 35,47 In addition, the absorption band from 3500 cm À1 to 3000 cm À1 corresponds to the stretching vibration of the terminal NH 2 and the NH groups generated by the incomplete condensation of CN. In the infrared spectrum of pure AVO, the peak at 875 cm À1 corresponds to V]O double bond vibration.…”

Section: Resultsmentioning

confidence: 99%

“… 33 Among these methods, coupling with other semiconductors is an effective and simple method, which can improve the separation efficiency of photogenerated electrons and holes, and is widely used. For example, g-C 3 N 4 –CdS, 34 g-C 3 N 4 –ZnO 35 and other photocatalysts have shown high catalytic activity. Due to its relatively narrow band gap and wide response range to visible light, Ag 3 VO 4 has attracted much attention for its excellent performance in decomposing organic pollutants, antibacterial activity and water decomposition under visible light irradiation.…”

Section: Introductionmentioning

confidence: 99%

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Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

Jiang

Zhu²,

Guo

et al. 2022

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

Jiang

Zhu²,

Guo

et al. 2022

RSC Adv.

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“…The enhanced photocatalytic activity of g-C3N4-ZnO is likely due to the synergistic effects of photon acquisition and direct contact between organic dyes and photocatalyst [470]. To be more specific, the RhB dye degradation efficiency of this composite is 99% and 95% after one and three cycles under sunlight irradiation, respectively [471]. It is reported that the highest degradation efficiency for MB is obtained for the 30 wt % few-layer g-C3N4-ZnO nanocomposites is the best composition [472].…”

Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

2022

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g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4–metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4–metal-oxide-based heterojunctions.

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“…constructed djembe-like ZnO and its composite with g-C3N4 as a visiblelight-driven heterojunction photocatalyst for the degradation of organic dyes, Zhu et al, (2014) [26] prepared carbon-doped zinc oxide (ZnO) hybridized with graphitic carbon nitride (g-C3N4) nanocomposite photocatalysts through simple one-step calcination of evaporationdried mixture of dicyandiamide and zinc nitrate and the photocatalytic activity of the resultant catalyst was examined for the degradation of methylene blue (MB) dye under visible light. Kumaresan et al, (2019) [27] synthesized heterojunction of g-C3N4/ZnO binary nanocomposites in 2D/1D by sonication assisted hydrothermal method for effective degradation of RhB dye and 4-chlorophenol under solar light irradiation. Tan et al, (2019) [28] prepared g-C3N4/ZnO heterostructure nanocomposites using self-assembly method for the degradation of MB dye under visible light.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of g-C3N4/ZnO Nanoheterostructures for Effective Degradation of Methylene Blue Dye under Visible Light Irradiation

Meena

Poswal²,

Surela³

et al. 2022

Preprint

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In the present, the g-C3N4/ZnO hybrid nanoheterostructures photocatalysts with different weight percents of ZnO have been successfully prepared by a facile grinding, dehydration followed by pyrolysis method. The structural and textural properties of the prepared samples were investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy combine electron dispersive spectroscopy (FESEM-EDS) and UV-vis spectroscopy. The photocatalytic performance of the fabricated g-C3N4/ZnO nanostructures was investigated for the degradation of methylene blue (MB) dye and it is determined much higher in compare to the bare g-C3N4 nanosheets and ZnO nanorods. The optimized ZnO content in the g-C3N4/ZnO photocatalyst was determined to be 25%. In the current study, 99.54% of MB dye is degraded in 60 min of visible light irradiation at pH = 10 over g-C3N4/ZnO (25%) photocatalyst. The results of the kinetic study reveals that photodegradation reactions have followed the first-order kinetics and the rate constant values of MB photodegradation in presence of prepared g-C3N4/ZnO (25%) is determined ∼13 and ∼7.76 times greater than that of the bare g-C3N4 and ZnO respectively. The enhanced photocatalytic efficiency of the fabricated g-C3N4/ZnO nanoheterostructures could be due to the creation of heterojunction by the coupling of two semiconductors of well matched band structures in which effective charge transfer has been occurred. The prepared g-C3N4/ZnO has demonstrated significant photostability after utilization in four runs of cycles. The decrease in the catalyst performance even after four repeated cycles is approximately 8%. The superoxide free radicals (•O2−) are the main reactive species participated in the degradation of MB dye. The current approach of fabrication of heterojunction has presented a competent and simplistic synthetic tactic of creation of visible-light-driven photocatalyst for the effective photocatalytic mineralization of organic dye contaminants in the aqueous medium.

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Synergetic effect of g-C3N4/ZnO binary nanocomposites heterojunction on improving charge carrier separation through 2D/1D nanostructures for effective photocatalytic activity under the sunlight irradiation

Cited by 63 publications

References 46 publications

Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

Fabrication of g-C3N4/ZnO Nanoheterostructures for Effective Degradation of Methylene Blue Dye under Visible Light Irradiation

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Synergetic effect of g-C3N4/ZnO binary nanocomposites heterojunction on improving charge carrier separation through 2D/1D nanostructures for effective photocatalytic activity under the sunlight irradiation

Cited by 63 publications

References 46 publications

Ag3VO4/g-C3N4/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

Ag3VO4/g-C3N4/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

Fabrication of g-C3N4/ZnO Nanoheterostructures for Effective Degradation of Methylene Blue Dye under Visible Light Irradiation

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Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light

Ag₃VO₄/g-C₃N₄/diatomite ternary compound reduces Cr(vi) ion in aqueous solution effectively under visible light