Tailoring power conversion efficiency of dye sensitized solar cell based on ZnO/g-C3N4 hybrid photoelectrodes via microwave irradiation route

Vijayanath, S.; Janaki, K.

doi:10.1016/j.inoche.2020.108119

Cited by 24 publications

(4 citation statements)

References 29 publications

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“…The typical diffraction peaks located at two-theta 25.31°, 36.95°, 37.79°, 38.57°, 48.05°, 53.88°, and 62.69° agree well with the primary reflections of the (101), (103), (004), (112), (200), (105), and (204) planes of the nano-TiO2 (PDF#71-1166), respectively. The diffraction peaks of pure g-C3N4 appearing at two-theta 12.86° and 27.59° are indexed as reflection from (100) and (002) planes corresponding to the inter-layer structural packing and the characteristic inter-planar stacking of the aromatic systems, respectively [34,35]. The diffraction peaks corresponding to TiO2 are clearly visible in the 5-CN-TO composite, but the diffraction peaks corresponding to g-C3N4 are not obvious, which is due to the sublimation of urea during the heating process, lessening the content of g-C3N4 in the composite.…”

Section: Xrd Analysismentioning

confidence: 99%

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Junxia

Cheng

et al. 2023

Catalysts

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The comprehensive utilization of low-grade diatomite resources and the effective treatment of printing and dyeing wastewater have attracted widespread attention. The combined scrubbing-magnetic separation-acid leaching-roasting process was used to increase the SiO2 content from 59.22% to 86.93%, reduce the Al2O3 content from 18.32% to 6.75%, and reduce the Fe2O3 content from 6.85% to 1.24% in the low-grade diatomite from Heilongjiang, China. The TiO2/g-C3N4/diatomite nanocomposite was prepared by a facile ultrasonic-thermal polymerization method. In this ternary structure, diatomite skeleton effectively increased the surface area with abundant adsorption sites, prevented g-C3N4 from restacking, and facilitated the separation of electrons and holes via the formation of TiO2/g-C3N4 heterojunctions. The degradation rate was 98.77%, 90.59%, and 89.16% for the three catalytic reaction cycles of the MB solution, respectively. The composite showed a high degradation rate of the MB solution after three cycles, which indicated that the composite had good recyclability. Through the free radical capture test, it was elucidated that O2−·, h+, and ·OH all played a role in the photocatalytic reaction of the TiO2/g-C3N4/diatomite to the MB solution, in which O2−· was mainly responsible for the photocatalytic oxidation mechanism, and the reaction kinetics were further investigated. This nanostructured TiO2/g-C3N4/diatomite composite has fascinating visible light catalytic activity and excellent stability.

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Section: Xrd Analysismentioning

confidence: 99%

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Junxia

Cheng

et al. 2023

Catalysts

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“…In comparison with other heterojunctions, GCN/ZnO display light absorption properties spanning a major portion of UV–visible region. Also, the combined catalytic effects and the surface-active sites along with their appropriate electronic band structures render effective charge carrier separation. , The other idiosyncrasy is the convenient preparation of these semiconductors using affordable precursors that allows one to tailor the heterojunction properties through altering the preparation methods. , The investigations of GCN/ZnO in many fields such as marine anticorrosion and antifouling, photovoltaics, sensors, luminescence, and anticancer drug have sparked enormous interest on this exquisite heterostructure.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 The other idiosyncrasy is the convenient preparation of these semiconductors using affordable precursors that allows one to tailor the heterojunction properties through altering the preparation methods. 3,12 The investigations of GCN/ZnO in many fields such as marine anticorrosion and antifouling, 13 photovoltaics, 14 sensors, 15 luminescence, 16 and anticancer drug 17 have sparked enormous interest on this exquisite heterostructure.…”

Section: Introductionmentioning

confidence: 99%

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

Kumar¹,

Kavitha²,

Manjunatha³

2023

Energy Fuels

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Heterostructuring the g-C 3 N 4 (GCN) with wide gap oxide photocatalysts is of prominent interest as they can harvest photons spanning the UV−visible region. In this regard, GCN/ZnO have garnered remarkable attention due to their admirable structure, optical, dimensional anisotropy, and electronic properties. The 2D sheet-like structure of GCN can serve as a suitable substrate for the growth of distinct ZnO nanostructures under the multitude of reaction conditions. This review focuses on the progress in the rational design and interface engineering of GCN/ZnO to from Type-II and Z/S-scheme heterojunctions, followed by their relevant photocatalytic applications toward H 2 evolution, CO 2 reduction, pollutant degradation, and bacteria inactivation. The mechanism underlying the crystallization of GCN and ZnO together with their intimate contact in the composite are emphasized under the light of diverse preparation methods. The modification of GCN/ZnO with cocatalysts such as metals, alloy, semiconductors, and carbon materials to form ternary systems to highlight their advancements. The gap analysis and future prospectus of this intricate heterostructure concerning the challenges in synthetic approaches and the charge carrier dynamics are discussed. This review envisages the development of efficient GCN/ZnO-based heterostructures for multiscale applications.

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“…A. Balapure et al has reported ZnO@g-C3N4 core-shell nanocomposites using melamine as a precursor showing that the nanocomposites have been enhanced photocatalytic performance in comparison to g-C3N4 or ZnO [6]. S. Vijayanath et al has reported g-C3N4 modified by ZnO nanoparticles with improved the light absorption property in the visible light region and retarded the electron-hole recombination process which enhanced photo-oxidation and photo-reduction activity [7]. R. Manimozhi has reported that g-C3N4/ZnO heterostructure photocatalyst showed to enhance crystal violet photocatalytic degradation efficiency [8].…”

Section: Introductionmentioning

confidence: 99%

ZnO/g-C3N4/Fe3O4 Nanocomposites Embedded Sa-PVA as Photocatalyst Hydrogel Beads for Photodegradation

Pattanasiri

Sangjan

2022

KEM

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In this research, Fe3O4 NPs and g-C3N4 nanosheets were synthesized by co-precipitation and the thermal decomposition method, respectively. The ZnO/g-C3N4/Fe3O4 nanocomposites (ZGF) with the varying weight sight of Fe3O4 NPs were 0.5 (0.5ZGF), 1.25 (1.25ZGF), 2.5 (2.5ZGF), and 5.0 (5.0ZGF) wt%, which were synthesized by a facile method. Synthesized Fe3O4 NPs, g-C3N4 nanosheets, and ZGF nanocomposite were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM). Then ZGF nanocomposites were contained on sodium alginate-polyvinyl alcohol (SA-PVA) as hydrogel packing material. Kinetics of photocatalytic activity and adsorption were studied by first-order reaction, second-order reaction, the pseudo-first-order, the pseudo-second-order, Elovich, and Avrami models. Especially, the photocatalytic activity and adsorption process of ZGF-SA-PVA composite hydrogel beads have been represented via Methylene Blue removal. The photodegradation efficiency of 2.5ZGF-SA-PVA composite hydrogel beads under visible light irradiation is increased by over 2 times, to be much higher than that of SA-PVA hydrogel beads. The results show that the organic removal efficiency of the SA-PVA hydrogel bead can be effectively improved by the ZGF nanocomposite.

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Tailoring power conversion efficiency of dye sensitized solar cell based on ZnO/g-C3N4 hybrid photoelectrodes via microwave irradiation route

Cited by 24 publications

References 29 publications

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

ZnO/g-C<sub>3</sub>N<sub>4</sub>/Fe<sub>3</sub>O<sub>4</sub> Nanocomposites Embedded Sa-PVA as Photocatalyst Hydrogel Beads for Photodegradation

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Tailoring power conversion efficiency of dye sensitized solar cell based on ZnO/g-C3N4 hybrid photoelectrodes via microwave irradiation route

Cited by 24 publications

References 29 publications

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Integrated Nanostructures of TiO2/g-C3N4/Diatomite Based on Low-Grade Diatomite as Efficient Catalyst for Photocatalytic Degradation of Methylene Blue: Performance and Mechanism

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

ZnO/g-C<sub>3</sub>N<sub>4</sub>/Fe<sub>3</sub>O<sub>4</sub> Nanocomposites Embedded Sa-PVA as Photocatalyst Hydrogel Beads for Photodegradation

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Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications