Barium‐Doped Zinc Oxide Thin Films as Highly Efficient and Reusable Photocatalysts

Jayakrishnan, A. R.; Alex, Kevin V.; Tharakan, Anoja Tony; Kamakshi, Koppole; Silva, José; Prasad, Madavi S.; Sekhar, K. C.; Gomes, M. J. M.

doi:10.1002/slct.201904943

Cited by 17 publications

(20 citation statements)

References 56 publications

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“…Moreover, Figure 7C exhibits two peaks centered at the binding energy of 405.08 and 412.52 eV related to Cd 3d 5/2 and Cd 3d 3/2 which indicate the existence of Cd 2+ ions in Cd, Ba co‐doped ZnO nanorods 36 . Furthermore, the peaks noted at 783.09 and 794.54 eV in the Ba 3d core level spectrum (Figure 7D) accord well with the binding energies of the respective Ba 3d 3/2 and Ba 3d 5/2 and designate the substitution of Ba 2+ into the ZnO matrix 29,37 . Hence, XPS analysis successfully demonstrates the inclusion of Cd 2+ and Ba 2+ ions into the ZnO lattice.…”

Section: Resultssupporting

confidence: 57%

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

Samuel

Shaji

Dhas³

et al. 2023

Surface & Interface Analysis

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The utilization of highly efficient ultraviolet (UV)-attenuating materials has inevitably signaled an ever-increasing demand to mitigate the impending pessimistic impact of UV rays that consistently depletes the ozone atmosphere. In this context, a highly efficient Cd, Ba co-doped ZnO nanomaterial has been prepared using a facile wet chemical approach. X-ray diffractometer analysis indicates the evolution of wurtzite structure of ZnO with a slight peak shift towards the higher angle upon co-doping which ascertains the impacted lattice contraction. N 2 adsorption/desorption isotherms of the material supplement magnificently a typical type-IV behavior displaying an H1 type hysteresis loop at high pressures whereby authorizing the open meso-porous characteristics. The resulting Cd, Ba co-doped ZnO nanorods disclose integrated performances of widespread polychromatic UV-visible luminescent emission, wide band gap, and enhanced UV absorbance. In particular, Cd, Ba co-doped ZnO nanorods impart a positive UV-blocking execution of 97% for UVA at 360 nm and 88% for UVB at 320 nm, which is found to be higher than most of the reported ZnO-related materials. Besides these intriguing aforementioned properties, co-doping is also appropriate for imparting better bacterial inhibition against the two tested strains (Escherichia coli and Staphylococcus aureus). Altogether, these results indicate that the co-doped ZnO nanorods developed in the current investigation could potentially serve as a propitious alternative UV-blocking material, especially for biomedical applications.

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Section: Resultssupporting

confidence: 57%

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

Samuel

Shaji

Dhas³

et al. 2023

Surface & Interface Analysis

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“…Interestingly, a slight The shift originated from the change in strain in the host lattice with the addition of the heteroatom. 26 Furthermore, the presence of the Se element and state in α-Fe 2 O 3 was confirmed and analyzed based on its XPS features. The Se-doped α-Fe 2 O 3 with optimal Se doping (vide infra) was used for the XPS study.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…As expected, E g modes in the Raman spectrum of Se-doped α-Fe 2 O 3 shifted toward higher wavenumber compared to undoped α-Fe 2 O 3 . The shift originated from the change in strain in the host lattice with the addition of the heteroatom …”

Section: Resultsmentioning

confidence: 99%

Doping of Nonmetal Se in Fe₂O₃ Nanowire Array-Based Photoanodes for Water Oxidation

Wen

et al. 2021

ACS Appl. Nano Mater.

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Achieving ideal photoelectrochemical (PEC) water splitting efficiency for renewable chemical fuel generation is a highly preferable but a challenging target. To do so, much effort needs to be taken to investigate photoelectrodes. In this study, we report the amelioration of hematite (α-Fe 2 O 3 ), which is a well-known semiconducting oxide suitable for PEC water oxidation. The Se-doped α-Fe 2 O 3 nanowire array thin film on the fluorine-doped tin oxide substrate was synthesized by a facile one-step hydrothermal process followed by in situ two-step annealing at 823 and 1073 K. A photocurrent of 0.85 mA cm −2 at 1.23 V versus RHE was achieved for the Se-doped α-Fe 2 O 3 photoanode, which was more augmented than the undoped α-Fe 2 O 3 photoanode (0.33 mA cm −2 ). The Mott−Schottky plot revealed that the carrier concentration of α-Fe 2 O 3 was strongly increased through Se doping. Photovoltage and electrochemical impedance spectroscopy indicated that Se-doped α-Fe 2 O 3 exhibited a stronger driving force and reduced charge transport resistance, which were crucial aspects for higher photocurrent. Our work highlights the importance of the nonmetal element dopant to improve the PEC performance of α-Fe 2 O 3 via convenient preparation.

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“…The ratio of current under the light condition to that under dark condition (I light /I dark ) at 1.5 V is found to be higher for the BMA heterostructure as shown in Figure 4d, further confirming its improved charge carrier generation and separation. [20] Table 1. Fitted parameters of the electrical impedance of the heterostructures.…”

Section: Electrical Studiesmentioning

confidence: 99%

Ternary Heterostructures Based on BaTiO₃/MoO₃/Ag for Highly Efficient and Reusable Photocatalytic Applications

Alex

Silva

Kamakshi

et al. 2023

Adv Materials Inter

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This work shows the fabrication of an efficient ternary heterostructure photocatalyst by integrating ferroelectric BaTiO3 (BTO) as the bottom layer, semiconductor MoO3 as the middle layer and plasmonic silver nanoparticles (Ag NPs) as the top layer, respectively. The BaTiO3/MoO3/Ag (BMA) heterostructure exhibits a higher photodegradation and photocatalytic efficiency of 100% for rhodamine B (RhB) dye under a UV–Visible light illumination of 60 min when compared with its binary heterostructure counterparts BaTiO3/Ag (BA) and MoO3/Ag (MA). The increased photocatalytic activity in BMA heterostructure is attributed to its enhanced interfacial electric field due to the electric double layer formation at BTO‐MoO3 and MoO3‐Ag interfaces. The higher blueshift in the surface plasmon resonance (SPR) peak observed for the BMA heterostructure clearly indicates an increased electron transfer toward the top Ag NPs layer under optical illumination. The higher resistive switching (RS) ratio, the increased difference in voltage minima, and the improved photocurrent generation, as evident from the I–V characteristics, illustrate the enhanced charge carrier generation and separation in BMA heterostructure. A smaller arc radius observed for the Nyquist plot of BMA heterostructure clearly showcases its increased interfacial charge transfer (CT). The CT mechanism and reusability of the BMA heterostructure are also studied.

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Barium‐Doped Zinc Oxide Thin Films as Highly Efficient and Reusable Photocatalysts

Cited by 17 publications

References 56 publications

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

Doping of Nonmetal Se in Fe₂O₃ Nanowire Array-Based Photoanodes for Water Oxidation

Ternary Heterostructures Based on BaTiO₃/MoO₃/Ag for Highly Efficient and Reusable Photocatalytic Applications

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Barium‐Doped Zinc Oxide Thin Films as Highly Efficient and Reusable Photocatalysts

Cited by 17 publications

References 56 publications

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

UV‐blocking performance and antibacterial activity of Cd, Ba co‐doped ZnO nanomaterials prepared by a facile wet chemical method

Doping of Nonmetal Se in Fe2O3 Nanowire Array-Based Photoanodes for Water Oxidation

Ternary Heterostructures Based on BaTiO3/MoO3/Ag for Highly Efficient and Reusable Photocatalytic Applications

Contact Info

Product

Resources

About

Doping of Nonmetal Se in Fe₂O₃ Nanowire Array-Based Photoanodes for Water Oxidation

Ternary Heterostructures Based on BaTiO₃/MoO₃/Ag for Highly Efficient and Reusable Photocatalytic Applications