Enhanced performance of sodium doped TiO2 nanorods based dye sensitized solar cells sensitized with extract from petals of Hibiscus sabdariffa (Roselle)

Shalini, S.; Balasundaraprabhu, R.; Kumar, T. Satish; Muthukumarasamy, N.; Prasanna, S.; Sivakumaran, K.; Kannan, M.D.

doi:10.1016/j.matlet.2018.03.091

Cited by 32 publications

(12 citation statements)

References 7 publications

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“…Hu et al presented the photo deposition of Ag nanoparticles on branched TiO 2 nanorod arrays for dye-sensitized solar cells which presented light-to-electricity conversion efficiencies in the range of 1.87–2.83% [ 48 ]. Even though the performance was reasonable, the TiO 2 nanoflower-based photoanode (in our case) showed higher photovoltaic performance when compared to similar photoanode based DSSCs in other scientific literature [ 44 , 46 , 47 , 48 ].…”

Section: Resultscontrasting

confidence: 54%

“…Moreover, Raman bands at 634 cm −1 (E g mode), 401 cm −1 (B 1g ), and 516 cm −1 (doublet of A 1g and B 1g modes) were associated to symmetric Ti–O vibration from the A g symmetric modes of the TiO 6 octahedra and the splitting of the degenerate mode of TiO 6 octahedra [45]. The obtained results were typical for the anatase phase of TiO 2 [44,45].…”

Section: Resultsmentioning

confidence: 99%

“…Raman scattering spectroscopy was used to further investigate the structural and scattering properties of the synthesized TiO 2 nanoflowers in the range 100–800 cm −1 ( Figure 4 c). All the observed Raman bands in the range of 100–800 cm −1 corresponded to the representative peaks of O–Ti–O in TiO 2 nano-materials [ 44 ]. The appearance of the Raman band at 148 cm −1 was indicative of anatase TiO 2 [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

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Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

et al. 2019

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This paper reports the rapid synthesis, characterization, and photovoltaic and sensing applications of TiO2 nanoflowers prepared by a facile low-temperature solution process. The morphological characterizations clearly reveal the high-density growth of a three-dimensional flower-shaped structure composed of small petal-like rods. The detailed properties confirmed that the synthesized nanoflowers exhibited high crystallinity with anatase phase and possessed an energy bandgap of 3.2 eV. The synthesized TiO2 nanoflowers were utilized as photo-anode and electron-mediating materials to fabricate dye-sensitized solar cell (DSSC) and liquid nitroaniline sensor applications. The fabricated DSSC demonstrated a moderate conversion efficiency of ~3.64% with a maximum incident photon to current efficiency (IPCE) of ~41% at 540 nm. The fabricated liquid nitroaniline sensor demonstrated a good sensitivity of ~268.9 μA mM−1 cm−2 with a low detection limit of 1.05 mM in a short response time of 10 s.

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Section: Resultscontrasting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

et al. 2019

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“…ere are current research studies focusing on the use of plant extracts for the green synthesis of different types of nanomaterials because the phytochemicals present in these natural extracts participate as capping agents or templates for the stabilization of crystalline phases and size control of the nanoparticles produced [26][27][28][29][30][31][32]. Recently, a mixture of rutile with impurities for anatase phase has been prepared via green synthesis using M. citrifolia leaves extract by the hydrothermal method with calcination temperature 400°C.…”

Section: Introductionmentioning

confidence: 99%

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Solano

Herrera

Maestre

et al. 2019

Journal of Nanotechnology

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Anatase TiO2 nanoparticles doped with iron ions have been synthesized via the green chemistry method using aqueous extract of lemongrass (Cymbopogon citratus) obtained from Soxhlet extraction and doped by wet impregnation. The TiO2 anatase phase has been doped with Fe3+ (0.05, 0.075, and 0.1 Fe3+ : Ti molar ratio) at 550°C and 350°C, respectively. The scanning electron microscopy with energy-dispersive X-ray (SEM-EDS) shows nanoparticle clusters and efficiencies of impregnations between 66.5 and 58.4% depending on the theoretical dopant amount. The electron transmission microscopy (TEM) reveals final particle sizes ranging between 7 and 26 nm depending on the presence or not of the dopant. The cathodoluminescence (CL) and photoluminescence (PL) studies of the doped and undoped nanoparticles show a luminescence signal attributed to surface oxygen vacancies (visible CL emission 380–700 nm and PL emission 350–800 nm); additionally, a decrease in emission intensity is observed due the inhibition of the recombination of the photogenerated electron-holes pairs; moreover, nanopowders were analyzed by UV-Vis spectrophotometry of diffuse reflectance, and the absorption edge of the Fe-TiO2 in comparison to undoped TiO2 is extended greatly toward the visible light. The six bands (A1g + 2B1g + 3Eg) found by Raman spectroscopy and the x-ray diffraction pattern (XRD) confirm that synthesized TiO2 is only anatase phase, which is commonly used as a catalyst in waste water treatment, specifically in heterogeneous photocatalytic processes.

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“…They recorded a PCE of 6% for sodium‐doped TiO 2 . [ 25 ] It is worth mentioning that only very few reports are available on Na 0.23 TiO 2 /TiO 2 nanorods for DSSC application.…”

Section: Introductionmentioning

confidence: 99%

A New Functional Composite for Photovoltaic and Sensor Applications

Ghosh

Roy

Mukhopadhyay

et al. 2021

Adv Elect Materials

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As a preliminary drive to eventually develop dye‐sensitized solar cell (DSSC)‐powered gas sensors, many oxide‐based systems have been explored to fabricate sensors that can show response at room temperature for any analyte gas. As an outcome of recent work in this endeavor, a composite nanorod of anatase TiO2 with Na0.23TiO2 is found to exhibit both photovoltaic performance and gas sensing at room temperature as demonstrated here. An interesting morphology change along with a phase change from nanoparticle to nanorod is observed during the hydrothermal synthesis of anatase TiO2 nanoparticles with sodium hydroxide under a highly basic condition. In order to understand the effect of the minor phase Na0.23TiO2 on the inherent properties of anatase TiO2, the application of nanorod composite in two unique potential application areas, DSSC and acetone sensings is investigated. The composite material exhibits an enhanced efficiency of 7.85% for a DSSC. Surprisingly, a resistive sensor fabricated with the synthesized composite material exhibits room temperature p‐type sensing behavior toward different concentrations of acetone (10, 5, 3, 2, and 1 ppm) with high selectivity.

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Enhanced performance of sodium doped TiO2 nanorods based dye sensitized solar cells sensitized with extract from petals of Hibiscus sabdariffa (Roselle)

Cited by 32 publications

References 7 publications

Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

A New Functional Composite for Photovoltaic and Sensor Applications

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Enhanced performance of sodium doped TiO2 nanorods based dye sensitized solar cells sensitized with extract from petals of Hibiscus sabdariffa (Roselle)

Cited by 32 publications

References 7 publications

Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

Rapid Growth of TiO2 Nanoflowers via Low-Temperature Solution Process: Photovoltaic and Sensing Applications

Fe-TiO2 Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

A New Functional Composite for Photovoltaic and Sensor Applications

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Product

Resources

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Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment