TiO2 nanofibers embedded with g-C3N4 nanosheets and decorated with Ag nanoparticles as Z-scheme photocatalysts for environmental remediation

Ghafoor, Samina; Inayat, Asia; Aftab, Faryal; Duran, Hatïce; Kirchhoff, Kathrin; Waseem, Sadia; Arshad, Sidra

doi:10.1016/j.jece.2019.103452

Cited by 41 publications

(12 citation statements)

References 58 publications

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“…[38] Ghafoor, S. et al reported TNFs embedded with g-C 3 N 4 nanosheets and decorated them with Ag NPs which exhibited 0.031 min À 1 pseudo-first order rate constant with almost 100 % photoreduction in 150 minutes. [11] Hence, it can be concluded that Ag deposition on P-doped TNFs showed excellent photoreduction of Cr(VI) under solar light illumination due to the synergistic effects discussed earlier.…”

Section: Photocatalytic Reduction Of Cr(vi)mentioning

confidence: 82%

“…[10] However, the use of TiO 2 is still limited due to its wide band-gap (i. e. 3.2 eV) that requires UV light (only 4 % of solar spectrum) to photo-generate the electronhole (e-h) pairs, high rate of their recombination and low electron transfer rate to oxygen. [11] Further the recovery and recycling of TiO 2 nanoparticles (NPs) is another major challenge for its practical applications. [12] One dimensional (1D) TiO 2 nanofibers (NFs) are the most interesting materials whose ultralong structure, produced by the low cost and relatively easy electrospinning technique, enhance the photocatalytic activity by increasing the charge separation and its transportation resulting in a reduction in the rate of recombination.…”

Section: Introductionmentioning

confidence: 99%

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P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

et al. 2020

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We report the synthesis of titania nanofibers (TNF) of ∼ 195 nm mean diameter doped with phosphorus through one-pot electrospinning followed by decoration of Ag nanoparticles (NPs). The Ag NPs of ∼ 8 nm size on 2 % P-doped TNFs (Ag-PTNFs) showed excellent photocatalytic activity for the reduction of Cr(VI), under simulated solar light, with ∼ 100 % conversion to Cr(III) in 90 min at pH 3 with a pseudo-first order rate constant of 0.085 min À 1 that is 96.5 % higher than TNFs. The Ag-PTNFs also exhibited excellent photodegradation of methylene blue with pseudo-first order rate constant of 0.052 min À 1 which is 82.7 % better than TNFs. The enhanced photocatalytic performance of Ag-PTNFs is attributed to the reduced band-gap, increased charge separation and reduced recombination rates. A proposed photocatalytic mechanism based on the synergistic effect of both Ag and P doping is presented which highlights the potential of these composite materials for water remediation.

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Section: Photocatalytic Reduction Of Cr(vi)mentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

et al. 2020

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“…Electrospinning parameters, including polymer solution properties, can be changed and controlled in order to obtain different nanofiber morphologies. Electrospun nanofibers are excellent candidates for use as membranes in water and wastewater treatment, including dye degradation [129][130][131][132], heavy metal ion adsorption [133][134][135], oily water separation [136,137], and microbial disinfection [130,138,139]. There are many types of materials, and these are briefly presented in Figure 3.…”

Section: Methodsmentioning

confidence: 99%

Multifunctional Membranes—A Versatile Approach for Emerging Pollutants Removal

et al. 2022

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This paper presents a comprehensive literature review surveying the most important polymer materials used for electrospinning processes and applied as membranes for the removal of emerging pollutants. Two types of processes integrate these membrane types: separation processes, where electrospun polymers act as a support for thin film composites (TFC), and adsorption as single or coupled processes (photo-catalysis, advanced oxidation, electrochemical), where a functionalization step is essential for the electrospun polymer to improve its properties. Emerging pollutants (EPs) released in the environment can be efficiently removed from water systems using electrospun membranes. The relevant results regarding removal efficiency, adsorption capacity, and the size and porosity of the membranes and fibers used for different EPs are described in detail.

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“…Ghafoor et al synthesized g-C 3 N 4 NS/ Ag/ TiO 2 NFS Z-scheme photocatalyst nanocomposites for environmental remediation for degradation of MB under simulated solar light irradiation. Moreover, the formation of Z-scheme heterojunction between TiO 2 and g-C 3 N 4 and the surface plasmon resonance (SPR) effect of Ag nanoparticles are responsible for enhanced visible-light absorption, photocatalytic activity, and charge separation of these nanofiber composites (Ghafoor et al, 2019). Moreover, Zhang et al synthesized Ag-TiO 2 / rGO nanocomposite via a solvothermal method for the removal of RhB dyes.…”

Section: Constructing G-c 3 N 4 /Tio 2 -Based Ternary Nanocomposites ...mentioning

confidence: 99%

Visible-Light-Driven g-C₃N₄/TiO₂ Based Heterojunction Nanocomposites for Photocatalytic Degradation of Organic Dyes in Wastewater: A Review

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Mekonnen

Asaithambi

et al. 2022

Air, Soil and Water Research

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Water pollution by organic contaminants is one of the most severe issues confronting the world today as a result of the rapid increase of industrialization, urbanization, human population growth, and advances in agricultural technologies. Several attempts have been made to address global water pollution issues by utilizing conventional wastewater treatment technologies. However, conventional wastewater treatment methods have several limitations such as low efficiency, high operation costs, generation of secondary waste, require additional chemicals as oxidants and extra energy. Therefore, Heterogeneous photocatalysis has gained a lot of attention in the degradation of persistent organic pollutants because it combines high efficiency, environmental friendliness, cheap cost, and safety. Subsequently, the designing of novel nanocomposite photocatalysts with strong visible light-harvesting ability, efficient charge separation and transportation, and superb stability is imminently desired for wastewater treatment. Recently, the notion of combining g-C3N4 with TiO2 to design high photocatalytic performance heterojunction photoactive nanocomposites for organic pollutant degradation has received a lot of attention. Meanwhile, the construction of g-C3N4/TiO2-based heterojunction nanocomposites may enhance the ability of harvesting visible light, boost charge separation and transfer efficiency, and robust photocatalytic activity. Firstly, this review concisely explained the main sources of water pollution, as well as potential treatment approaches and the fundamental mechanism of heterogeneous photocatalysis. Subsequently, the details of properties, synthesis techniques, photoactivity modification strategies, and photocatalytic applications of g-C3N4, TiO2, and g-C3N4/TiO2 heterojunction photocatalysts are presented. Following that, the recent advances aimed at improving the photocatalytic performance of various types of visible-light-driven g-C3N4/TiO2 heterojunction photocatalysts for organic pollutant degradation in wastewater are presented in detail. Finally, some concluding remarks and perspectives on the challenges and opportunities for constructing different types of g-C3N4/TiO2-based heterostructured photocatalysts are presented.

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TiO2 nanofibers embedded with g-C3N4 nanosheets and decorated with Ag nanoparticles as Z-scheme photocatalysts for environmental remediation

Cited by 41 publications

References 58 publications

P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

Multifunctional Membranes—A Versatile Approach for Emerging Pollutants Removal

Visible-Light-Driven g-C₃N₄/TiO₂ Based Heterojunction Nanocomposites for Photocatalytic Degradation of Organic Dyes in Wastewater: A Review

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TiO2 nanofibers embedded with g-C3N4 nanosheets and decorated with Ag nanoparticles as Z-scheme photocatalysts for environmental remediation

Cited by 41 publications

References 58 publications

P‐doped TiO2 Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

P‐doped TiO2 Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

Multifunctional Membranes—A Versatile Approach for Emerging Pollutants Removal

Visible-Light-Driven g-C3N4/TiO2 Based Heterojunction Nanocomposites for Photocatalytic Degradation of Organic Dyes in Wastewater: A Review

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P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

P‐doped TiO₂ Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

Visible-Light-Driven g-C₃N₄/TiO₂ Based Heterojunction Nanocomposites for Photocatalytic Degradation of Organic Dyes in Wastewater: A Review