Dye-sensitized solar cell based on TiO<sub>2</sub>/MnO<sub>2</sub>composite film as working electrode

Prasetio, Adi; Habieb, Alvin Muhammad; Alkian, Ilham; Arifin, Zainal; Widiyandari, Hendri

doi:10.1088/1742-6596/877/1/012005

Cited by 15 publications

(10 citation statements)

References 12 publications

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“…Moreover, A and E g are a constant and the energy band gap, respectively; if the semiconductor has an indirect band gap, n is 2; if not, n is 1/2 for a direct band gap. As for the indirect band gap of anatase TiO 2 , , optical energy gaps were calculated at about 3.13 eV for BaFe 12 O 19 /TiO 2 /Pt and 3.08 eV for BaFe 12 O 19 /TiO 2 /Pd, respectively, as shown in Figure .…”

Section: Resultsmentioning

confidence: 95%

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Razavi

Ghanbari

Salavati‐Niasari

2022

Ind. Eng. Chem. Res.

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Adding noble metals and barium hexaferrite to TiO 2 creates novel magnetic plasmonic nanocomposites with high activity in the photodegradation of organic contaminants. In this work, we have synthesized BaFe 12 O 19 by microwave and sol−gel combustion (using green fuel, glucose) methods and TiO 2 by the sol−gel method. Then, noble metals (Pt and Pd) were deposited on BaFe 12 O 19 /TiO 2 by a reducing agent (glucose: green surfactant) under ultrasound waves. The samples were characterized. On the basis of XRD and SEM results, the composites are highly crystalline and impurity-free. TEM images and BET analysis indicated the samples have a suitable morphology. Furthermore, the magnetic analysis showed the addition of TiO 2 and noble metals to barium hexaferrite has led to the lower coercivity, but the synthesized nanocomposites still have the suitable magnetic properties (M sBaFe12O19/TiO2@Pt = 37, M sBaFe12O19/TiO2/Pd = 34, M rBaFe12O19/TiO2@Pt = 16, M rBaFe12O19/TiO2/Pd = 13.9 emu/g). UV−vis DRS spectra revealed the band gaps of BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd are 3.13 and 3.08 eV, respectively. Finally, BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd nanocomposites were used to degrade the anionic and cationic dyes under visible irradiation within 120 min. The highest percentage of degradation was related to methyl orange, around 96% and 92% by BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd, respectively. Indeed, Pt because of its high work function and electron affinity is more effective in photodegradation.

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Section: Resultsmentioning

confidence: 95%

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Razavi

Ghanbari

Salavati‐Niasari

2022

Ind. Eng. Chem. Res.

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“…(iii) With the incorporation of manganese and increasing its concentration the bandgap decreases, which may be due to the lower values of the direct and indirect energy gap of MnO 2 [30]. Thus, MnO 2 can modify the absolute positions of the valence and conduction bands position, which results in the broad absorption band in present phosphors [34,35].…”

Section: Xps Analysismentioning

confidence: 98%

Simultaneous effects of synthesis temperature and dopants on MgWO₄ UC phosphors

Prasad

Kumar

2022

Methods Appl. Fluoresc.

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A sequence of coactivated divalent-metal tungstate Er3+/Yb3+/Mn4+: MgWO4 phosphors have been successfully developed to study the effect of synthesis temperature on the crystal structure, surface morphology, fluorescence, temperature sensing and the dynamics involved in the processes. Upconversion (UC) intensity of the Er3+/Yb3+: MgWO4 phosphors increased by ~ 109 and ~ 778 times on increasing the synthesis temperature from 800 ºC to 1000 ºC and 1200 ºC. UC intensity of the Er3+/Yb3+/Mn4+: MgWO4 phosphors has been significantly improved up to ~ 90 times via charge compensation. The incorporation of Mn4+ in the Er3+/Yb3+ codoped crystal system shifted the UC spectra from sharp green peaks to broadband emission along with amended sensing abilities. The ratiometric techniques of thermally coupled stark sublevels of the Er3+ have been used to achieve a wide temperature range (300 - 623K). The prepared nanophosphors show maximum absolute & relative sensitivities ~ 25.86×10-3 K-1 @453K and ~ 10.39×10-3 K-1 @303 K respectively with an accuracy of ± 0.42K@303K.

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“…Lee et al reported enhanced electron injection and decreased recombination in organic light emitting diodes while using MnO 2 as an interlayer between the organic emitter and cathode [18]. Improved electron transport was also reported for DSC devices that were fabricated while using TiO 2 -MnO 2 composite working electrodes [19]. MnO 2 has also been reported as a low-cost counter electrode in DSC devices [20].…”

Section: Introductionmentioning

confidence: 95%

Metal Oxide Oxidation Catalysts as Scaffolds for Perovskite Solar Cells

et al. 2020

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Whilst the highest power conversion efficiency (PCE) perovskite solar cell (PSC) devices that have reported to date have been fabricated by high temperature sintering (>500 °C) of mesoporous metal oxide scaffolds, lower temperature processing is desirable for increasing the range of substrates available and also decrease the energy requirements during device manufacture. In this work, titanium dioxide (TiO2) mesoporous scaffolds have been compared with metal oxide oxidation catalysts: cerium dioxide (CeO2) and manganese dioxide (MnO2). For MnO2, to the best of our knowledge, this is the first time a low energy band gap metal oxide has been used as a scaffold in the PSC devices. Thermal gravimetric analysis (TGA) shows that organic binder removal is completed at temperatures of 350 °C and 275 °C for CeO2 and MnO2, respectively. By comparison, the binder removal from TiO2 pastes requires temperatures >500 °C. CH3NH3PbBr3 PSC devices that were fabricated while using MnO2 pastes sintered at 550 °C show slightly improved PCE (η = 3.9%) versus mesoporous TiO2 devices (η = 3.8%) as a result of increased open circuit voltage (Voc). However, the resultant PSC devices showed no efficiency despite apparently complete binder removal during lower temperature (325 °C) sintering using CeO2 or MnO2 pastes.

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Dye-sensitized solar cell based on TiO₂/MnO₂composite film as working electrode

Cited by 15 publications

References 12 publications

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Simultaneous effects of synthesis temperature and dopants on MgWO₄ UC phosphors

Metal Oxide Oxidation Catalysts as Scaffolds for Perovskite Solar Cells

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Dye-sensitized solar cell based on TiO2/MnO2composite film as working electrode

Cited by 15 publications

References 12 publications

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe12O19/TiO2 Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe12O19/TiO2 Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Simultaneous effects of synthesis temperature and dopants on MgWO4 UC phosphors

Metal Oxide Oxidation Catalysts as Scaffolds for Perovskite Solar Cells

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Dye-sensitized solar cell based on TiO₂/MnO₂composite film as working electrode

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Simultaneous effects of synthesis temperature and dopants on MgWO₄ UC phosphors