Performance analysis of anomalous photocatalytic activity of Cr-doped TiO2 nanoparticles [Cr(x)TiO2(1−x)]

Bansal, Jyoti; Tabassum, Rana; Swami, Sanjay Kumar; Bishnoi, Swati; Vashishtha, Pargam; Gupta, Govind; Sharma, Shweta; Hafiz, Aurangzeb Khurram

doi:10.1007/s00339-020-03536-z

Cited by 22 publications

(14 citation statements)

References 42 publications

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“…It is also noted that the sharpest peak of TNC at 144 cm –1 shows a downshift toward the lower frequency region compared to the peak of TNS (shown in Figure d). This may be due to the presence of a lower number of oxygen vacancies in TNC than in the TNS …”

Section: Resultsmentioning

confidence: 99%

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Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Kunka Ravindran,

Narendhiran,

Nambiraj

et al. 2024

ACS Appl. Opt. Mater.

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As a key component of perovskite solar cells (PSCs), the electron transport layer (ETL) extracts charges efficiently. While TiO 2 is widely recognized as a superior electron transport material (ETM) for its numerous advantages, the morphological limitations of spherical TiO 2 nanoparticles (NPs) lead to significant electron losses. Therefore, as an alternative to nanospheres, TiO 2 nanocubes are synthesized through a solvothermal route and employed as ETM in the low-cost carbon electrode-based perovskite solar cells (CPSCs). The structural, morphological, and optical properties of the TiO 2 nanocubes (NCs) are studied and compared with TiO 2 nanospheres (NSs) in detail. The device possessing cubic TiO 2 achieved a power conversion efficiency (PCE) of 10.6% with a current density (J sc ) of 21.79 mA/cm 2 . Recognizing that the oxygen vacancies in cubic TiO 2 are lower than in spherical TiO 2 , it is inferred that further reduction of oxygen vacancies in cubic TiO 2 could enhance the current collection. Hence, to get rid of the oxygen vacancy (which acts as an electron trap) in the cubical TiO 2 , aluminum (Al 3+ ) is incorporated into its matrix. A comprehensive analysis of its impact on structural and optical behavior follows. In addition to its cost-effectiveness and conductive nature, it has been observed that the stable form of Al 3+ replaces the unstable Ti 3+ (which acts as a trap state), thereby reducing the recombination rate. With the highest current collection of 22.85 mA/cm 2 , a PCE of 11.3% has been recorded for the solar cell that possessed 1% Al-doped TNC. Furthermore, the ambient stability of the respective device shows ∼85% of its initial PCE. The effect of the TiO 2 nanostructure and Al 3+ doping in TiO 2 nanocubes is discussed elaborately in this work.

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Section: Resultsmentioning

confidence: 99%

“…This may be due to the presence of a lower number of oxygen vacancies in TNC than in the TNS. 36 The morphology of the synthesized TiO 2 nanostructures was examined using FESEM. The resultant FESEM images are shown in Figure S2.…”

Section: Investigation On Spherical and Cubic Tio 2 As Etm In Cpscmentioning

confidence: 99%

Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Kunka Ravindran,

Narendhiran,

Nambiraj

et al. 2024

ACS Appl. Opt. Mater.

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“…28 Meanwhile, no PdO peak was observed in the PdO/C-Nb 2 O 5 sample, which may be due to its good dispersion and ultra-low loading of Pd. 29 In addition, the loading of Pd 2+ in the Nb 2 O 5 lattice led to the partial substitution of Nb 5+ and charge imbalance, 28,30 consequently inducing the generation of oxygen vacancies to compensate for the charge imbalance. Defects of oxygen vacancies were detected by electron-paramagnetic resonance (EPR) measurement (Fig.…”

Section: Characterizations Of Catalystsmentioning

confidence: 99%

“…The photogenerated electrons (e − ) on the CB rapidly migrate to the surface of the catalyst, while the generated holes (h + ) remain in the catalyst VB position. 8,29,48 This separation of charge is enforced by the loaded PdO. 29 Subsequently, the adsorbed oxygen on the catalyst surface is reduced to superoxide radicals ( OH).…”

Section: Photocatalytic Mechanismmentioning

confidence: 99%

Solvent-free aerobic photocatalytic oxidation of C(sp³)–H and C(sp³)–OH to CO bonds

Jiang,

Wang,

Wang

et al. 2024

Green Chem.

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“…As a result of the dopant's alterations to the lattice parameters, the host lattice will experience the strain. The Williamson-Hall method was deployed to measure the average crystallite structure and lattice strain from the XRD line broadening and shifting [23]. Figure 2 shows the Williamson-Hall plots of all the notable peaks and employs the best linear tting.…”

Section: Crystal Structure and Morphologymentioning

confidence: 99%

Assessment of properties, photocatalytic activity, cytotoxicity, and antibacterial activity of (Cu, Cr) dual-doped ZnO nanoparticles

Ashokkumar

Rajkumar

Pugazhvadivu

2023

Preprint

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Co-precipitation, a minimal technique, was used to successfully create novel (Cr, Cu) dual-doped ZnO nanoparticles (NPs). X-ray diffraction (XRD), energy dispersion X-ray (EDX) analysis, scanning electron microscopes (SEM), and UV-visible absorption spectra had been used to characterize the produced nanoparticle. The produced NPs have a hexagonal wurtzite structure with a high phase purity, according to the XRD pattern. the substitution of Cr increased optical absorption and inducing new absorption peaks in the visible regions that correspond to the transitions from 4A2(4F) to CB and 4A2(4F) to 4T1(4F). Absorption of photon in the visible region led to increase the photo-generated electron-hole pairs and hence RO-species which responsible for photocatalytic activity. Therefore the (Cu, Cr) dual doped ZnO NPs had excellent photocatalytic activity under sun light irradiation. MTT assay was employed to analyze the in vitro cytotoxicity of Cr-doped Zn0.98Cu0.02O NPs on human normal PBMC. The toxicity is enhanced by an increase in Cr concentration in very small amounts at low concentrations and significantly at high concentrations. The antibacterial characteristics of the produced NPs was examined against the bacterial strains P. putida and B. subtilis.

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Performance analysis of anomalous photocatalytic activity of Cr-doped TiO2 nanoparticles [Cr(x)TiO2(1−x)]

Cited by 22 publications

References 42 publications

Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Solvent-free aerobic photocatalytic oxidation of C(sp³)–H and C(sp³)–OH to CO bonds

Assessment of properties, photocatalytic activity, cytotoxicity, and antibacterial activity of (Cu, Cr) dual-doped ZnO nanoparticles

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Performance analysis of anomalous photocatalytic activity of Cr-doped TiO2 nanoparticles [Cr(x)TiO2(1−x)]

Cited by 22 publications

References 42 publications

Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Catalyzing the Affordability of Perovskite Solar Cells with Aluminum-Modified Cubic Titania

Solvent-free aerobic photocatalytic oxidation of C(sp3)–H and C(sp3)–OH to CO bonds

Assessment of properties, photocatalytic activity, cytotoxicity, and antibacterial activity of (Cu, Cr) dual-doped ZnO nanoparticles

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About

Solvent-free aerobic photocatalytic oxidation of C(sp³)–H and C(sp³)–OH to CO bonds