Spinach extract and Eosin-Y co-sensitized ceria photoanode for dye sensitized solar cell application: effect of dye adsorption time

Highly toxic divalent cadmium causes serious environmental issues. To quickly monitor and/or efficiently remove this potentially toxic metal ion as well as to explore its interfacial chemistry with metal oxides, a sulfur and carbon co-doped titania (S/C-TiO 2 ) composite is synthesized via a facile sol-gel method with the assistance of sodium lignosulphonate (SLS). The prepared composite displays a well-crystallized TiO 2 nanostructure comprising the anatase phase. Both S and C, which are derived from the SLS template, are found to enter the TiO 2 lattice. The S/C-TiO 2 composite exhibits a porous structure with a wide pore size distribution. The newly synthesized composite shows adsorption capability for the potentially toxic metal Cd(II). The adsorption process requires <5 min to reach equilibrium. The measured equilibrium adsorption capacity is 19.42 mg g −1 , which is twice as high as that of bare TiO 2 . The removal efficiency is as high as 97%. Moreover, the materials are suitable for contaminated solutions over a wide range of pH values and various initial cadmium concentrations. A mechanism for the enhanced adsorption behavior is also proposed.

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“…The sizes of the TiO 2 crystallites in the composite were calculated according to the Scherrer equation:

L (hkl) = 0.9 λ / Δ (hkl) \cos θ

where L (hkl) is the average grain size calculated by (hkl) lattice plane.…”

Section: Resultsmentioning

confidence: 99%

Sulfur and Carbon Co‐doped TiO₂ Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Zou

Shang

Wang

et al. 2019

CLEAN Soil Air Water

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“…For the preparation of nanocrystalline CeO2 powder, [12][13]15,[26][27] cerium nitrate solution in DDW was used as a source of Ce 4+ ions. And ammonia solution was added to this solution as a source of OHions.…”

Section: Synthesis Of Ceo2 Nanoparticlesmentioning

confidence: 99%

“…Various research groups are trying to implement different wide bandgap materials for photoanode; such as TiO2, [1][2][3] ZnO, [4][5][6] SnO2 [7][8] Nb2O5, [9][10] CeO2, [11][12][13] MoO3 [14] etc. One of the most important parameters is the conduction band position of the wide bandgap material used and the lowest unoccupied molecular orbital (LUMO) level of the dye.…”

Section: Introducitonmentioning

confidence: 99%

Eosin-Y Sensitized Bi-layered ZnO Nanoflower-CeO2 Photoanode for Dye-Sensitized Solar Cells Application

Sayyed¹,

Beedri²,

Bhujbal³

et al. 2020

ES Mater. Manuf.

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The energy demand is increasing with the development of science and technology, as even common people are accessible to use different home appliances, devices, and gadgets. Solar energy could be the only feasible solution to the present and future energy crisis. Amongst different types of solar cells, Dye-Sensitized Solar Cells (DSSCs) can cope up with the situation by providing cost effective and environmentally suitable solution. In the present work, we discuss the synthesis of Eosin-Y sensitized bi-layered ZnO nanoflower-CeO2 photoanode for DSSCs. The compact ZnO nanoflower-CeO2 layers were deposited by dip coatings and doctor blade methods respectively. From the XRD analyses, the structures of both ZnO and CeO2 were confirmed with the nanocrystalline size of ~15nm and ~10nm respectively by the Scherrer formula. SEM confirms the nanoflower morphology for ZnO (useful in dye adsorption and electron transfer) and porous, rough and spongy morphology for CeO2 (useful for dye adsorption). The band gap values of ~3.2eV and ~3.1eV for ZnO and CeO2 respectively were calculated using UV-Visible data by Tauc's plot. After device fabrication, form the J-V characteristics, the solar cell parameters for best-performing cells were calculated as open-circuit voltage ~460mV, short circuit photocurrent density ~0.4mA/cm 2 with fill factor ~55%.

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“…Other than TiO 2 photo electrodes, co-sensitization has also been successively achieved using Zn 2 SnO 4 [117], different nanostructures of ZnO such as nanorods [154,204], nanoballs [205], NWs [28,221] and nanoporous film [98], ceria (CeO 2 ) nanoparticles [217] and SnO 2 based electrodes sensitization by QDs [85,255]. Due to the enhanced charge transport of carriers over other morphologies, hierarchical structures of ZnO improved the charge transport and further modification by the chalcogenide nanoparticles was found to enhance the efficiency [152].…”

Section: Role Of Non-tio 2 Photoanodes In Co-sensitization Of Qdsmentioning

confidence: 99%

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

et al. 2019

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Novel materials for third generation solar cells have emerged as one of the major scientific contribution in alternative energy approaches. In this scenario, semiconductor nanomaterials and organic dye molecules have greatly acknowledged for their vast contribution to the solar energy applications. Research on semiconductor nanomaterials for fabricating future generation solar cells is still fascinating due to their extraordinary structural and optical properties. Moreover, functionalization of organic dye molecules helps to harvest large amount of photons in order to apply them for high efficiency solar cell devices. Various attempts have been made to improve efficiency of quantum dot-sensitized solar cells and dye-sensitized solar cells using semiconductor inorganic nanomaterials and organic/organometallic dye molecules. Out of these, co-sensitization has been looking as most promising approach to improve the efficiency considerably. A record of over 14% of efficiency has been achieved in recent years through co-sensitization strategy. The energy transfer process during co-sensitization is also a very crucial and interesting. This review deals about materials, methods, various approaches and role of co-sensitization in enhancing the efficiency of dye-sensitized and quantum dot sensitized solar cells. The critical issues existing in the co-sensitization approach are also elaborately discussed.

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Spinach extract and Eosin-Y co-sensitized ceria photoanode for dye sensitized solar cell application: effect of dye adsorption time

Cited by 16 publications

References 30 publications

Sulfur and Carbon Co‐doped TiO₂ Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Sulfur and Carbon Co‐doped TiO₂ Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Eosin-Y Sensitized Bi-layered ZnO Nanoflower-CeO2 Photoanode for Dye-Sensitized Solar Cells Application

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

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Spinach extract and Eosin-Y co-sensitized ceria photoanode for dye sensitized solar cell application: effect of dye adsorption time

Cited by 16 publications

References 30 publications

Sulfur and Carbon Co‐doped TiO2 Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Sulfur and Carbon Co‐doped TiO2 Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Eosin-Y Sensitized Bi-layered ZnO Nanoflower-CeO2 Photoanode for Dye-Sensitized Solar Cells Application

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

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Sulfur and Carbon Co‐doped TiO₂ Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium

Sulfur and Carbon Co‐doped TiO₂ Composite Fabricated by Lignosulphonate and Its Suitability for Removal of Cadmium