Highly efficient g-C3N4/Cr-ZnO nanocomposites with superior photocatalytic and antibacterial activity

Qamar, Muhammad Azam; Shahid, Sammia; Javed, Mohsin; Iqbal, Shahid; Sher, Mudassar; Akbar, Muhammad Bilal

doi:10.1016/j.jphotochem.2020.112776

Cited by 131 publications

(43 citation statements)

References 74 publications

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“…In Figure 13, nanocomposites of graphitic carbon nitride/chromium (g-C 3 N 4 /Cr)-ZnO showed exceptional photocatalytic properties in antibacterial applications. 158 Under simulated solar irradiation, g-C 3 N 4 /Cr-ZnO nanocomposite showed an improved photocatalytic mechanism by reducing the bandgap and improved electron-hole regeneration to generate ROS to eradicate bacteria by substantially damaging bacterial cell walls. [159][160][161] A recently reported copper sulfide-conjugated protonated C 3 N 4 (CuS/PCN) composite showed enhanced antibacterial activity under the dual effects of visible light irradiation and a photothermal effect.…”

Section: Carbon-based Nanocompositesmentioning

confidence: 99%

Emerging Trends in Nanomaterials for Antibacterial Applications

Yougbaré¹,

Mutalik²,

Okoro³

et al. 2021

IJN

127

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Around the globe, surges of bacterial diseases are causing serious health threats and related concerns. Recently, the metal ion release and photodynamic and photothermal effects of nanomaterials were demonstrated to have substantial efficiency in eliminating resistance and surges of bacteria. Nanomaterials with characteristics such as surface plasmonic resonance, photocatalysis, structural complexities, and optical features have been utilized to control metal ion release, generate reactive oxygen species, and produce heat for antibacterial applications. The superior characteristics of nanomaterials present an opportunity to explore and enhance their antibacterial activities leading to clinical applications. In this review, we comprehensively list three different antibacterial mechanisms of metal ion release, photodynamic therapy, and photothermal therapy based on nanomaterials. These three different antibacterial mechanisms are divided into their respective subgroups in accordance with recent achievements, showcasing prospective challenges and opportunities in clinical, environmental, and related fields.

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Section: Carbon-based Nanocompositesmentioning

confidence: 99%

Emerging Trends in Nanomaterials for Antibacterial Applications

Yougbaré¹,

Mutalik²,

Okoro³

et al. 2021

IJN

127

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“…76,77 In addition, the accumulated h + in the VB of g-C 3 N 4 might directly degrade MB. [78][79][80][81][82] The produced (O 2 À and OHc) reactive species interact with the MB molecules and decompose them by following a sequence of redox reactions, as given by eqn (2)-( 6). The better photocatalytic activity of the CZS-25 NC might be ascribed to the suppressed e-h pairs recombination rate because of the Fig.…”

Section: Mechanismmentioning

confidence: 99%

Highly efficient visible light active Cu–ZnO/S-g-C₃N₄ nanocomposites for efficient photocatalytic degradation of organic pollutants

et al. 2021

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“…The high reducing electrons located on the CB of Cr(III) would react with O 2 to form O 2 •– . 173 This can further oxidize MB. The holes located on the VB of Ag would photocatalytically oxidize H 2 O, giving rise to an • OH radical, which in turn will oxidize MB.…”

Section: Resultsmentioning

confidence: 99%

Self-Assembled Silver Nanoparticles Decorated on Exfoliated Graphitic Carbon Nitride/Carbon Sphere Nanocomposites as a Novel Catalyst for Catalytic Reduction of Cr(VI) to Cr(III) from Wastewater and Reuse for Photocatalytic Applications

Prabakaran

Pillay

2021

ACS Omega

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Silver nanoparticles decorated on an exfoliated graphitic carbon nitride/carbon sphere (AgNP/Eg-C 3 N 4 /CS) nanocomposites were synthesized by an adsorption method with a self-assembled process. These nanoparticles were characterized by different techniques like UV–visible (UV–vis) spectroscopy, photoluminescence (PL) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Raman spectroscopy, scanning electron spectroscopy (SEM), transmission electron spectroscopy (TEM), electrochemical impedance spectroscopy (EIS), and ζ potential. AgNP/Eg-C 3 N 4 /CS nanocomposites showed a higher catalytic reduction activity for the conversion of Cr(VI) into Cr(III) with formic acid (FA) at 45 °C when compared to bulk graphitic carbon nitride (Bg-C 3 N 4 , Eg-C 3 N 4 , CS, and Eg-C 3 N 4 /CS). The kinetic rate constants were determined as a function of catalyst dosage, concentration of Cr(VI), pH, and temperature for the AgNP/Eg-C 3 N 4 /CS nanocomposite. This material showed higher reduction efficiency (98.5%, k = 0.0621 min –1 ) with turnover frequency (0.0158 min –1 ) for the reduction of Cr(VI) to Cr(III). It also showed great selectivity and high stability after six repeated cycles (98.5%). Further, the reusability of the Cr(III)-AgNP/Eg-C 3 N 4 /CS nanocomposite was also investigated for the photocatalytic degradation of methylene blue (MB) under visible light irradiation with various time intervals and it showed good degradation efficiency (α = 97.95%). From these results, the AgNP/Eg-C 3 N 4 /CS nanocomposite demonstrated higher catalytic activity, improved environmental friendliness, lower cost for the conversion of toxic Cr(VI) to Cr(III) in solutions, and also good reusability.

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Highly efficient g-C3N4/Cr-ZnO nanocomposites with superior photocatalytic and antibacterial activity

Cited by 131 publications

References 74 publications

Emerging Trends in Nanomaterials for Antibacterial Applications

Emerging Trends in Nanomaterials for Antibacterial Applications

Highly efficient visible light active Cu–ZnO/S-g-C₃N₄ nanocomposites for efficient photocatalytic degradation of organic pollutants

Self-Assembled Silver Nanoparticles Decorated on Exfoliated Graphitic Carbon Nitride/Carbon Sphere Nanocomposites as a Novel Catalyst for Catalytic Reduction of Cr(VI) to Cr(III) from Wastewater and Reuse for Photocatalytic Applications

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Highly efficient g-C3N4/Cr-ZnO nanocomposites with superior photocatalytic and antibacterial activity

Cited by 131 publications

References 74 publications

Emerging Trends in Nanomaterials for Antibacterial Applications

Emerging Trends in Nanomaterials for Antibacterial Applications

Highly efficient visible light active Cu–ZnO/S-g-C3N4 nanocomposites for efficient photocatalytic degradation of organic pollutants

Self-Assembled Silver Nanoparticles Decorated on Exfoliated Graphitic Carbon Nitride/Carbon Sphere Nanocomposites as a Novel Catalyst for Catalytic Reduction of Cr(VI) to Cr(III) from Wastewater and Reuse for Photocatalytic Applications

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Highly efficient visible light active Cu–ZnO/S-g-C₃N₄ nanocomposites for efficient photocatalytic degradation of organic pollutants