Substrate temperature induced effect on microstructure, optical and photocatalytic activity of ultrasonic spray pyrolysis deposited MoO<sub>3</sub>thin films

Alex, Kevin V.; Jayakrishnan, A. R.; S, Ajeesh Kumar; Ibrahim, Ammar; Kamakshi, Koppole; Silva, José; Sekhar, K. C.; Gomes, M. J. M.

doi:10.1088/2053-1591/ab0f7a

Cited by 22 publications

(17 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD pattern of the pure BTO film consists of a small and broad peak corresponding to the reflection of (101) plane related to BTO. − This suggested the presence of partial amorphous nature of BaTiO 3 . The pure MoO 3 film shows the intense diffraction reflections related to the (020), (040), and (060) planes and are attributed to the orthorhombic phase (α) of MoO 3 . , The heterostructure with t MoO 3 = 40 nm exhibits (101) reflection related to BTO and (002) reflection related to α-MoO 3 which confirms the formation of the BTO/MoO 3 heterostructure. The higher growth rate along [001] direction than that along [010] principle axis favored the (002) orientation .…”

Section: Resultsmentioning

confidence: 71%

“…The shift in the fundamental absorption edge causes the change in band gap energy. Optical direct band gap energy ( E g ) is calculated from Tauc plot using relation . , where “α” is the absorption coefficient, “ h ν” is the incident photon energy, “ A ” is a constant, and “ E g ” is the optical band gap energy. The optical absorption coefficient (α) of the film is given by eq where “ t ” is the film thickness.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, molybdenum trioxide (MoO 3 ) has also gained attraction as a photocatalyst because of its anisotropic crystal growth, formation of rod-shaped morphology, and high photon absorption ability. ,− For instance, Arfaoui et al studied the photocatalytic properties of thermally evaporated MoO 3 films and reported a photodegradation efficiency of 81% using methylene blue (MB) dye with exposure to UV–visible light for 120 min . Recently, we have shown that the photocatalytic efficiency of ultrasonic spray deposited MoO 3 films can be tuned via substrate temperature by using rhodamine B (RhB) as a model dye and attained a maximum efficiency of 91% at an illumination of UV–visible light for 120 min . However, the higher recombination rate of charge carriers in the conventional semiconductor-based catalysts hinders their photocatalytic efficiency .…”

Section: Introductionmentioning

confidence: 99%

“…The effect of MoO 3 layer thickness ( t MoO 3 ) on the photocatalytic efficiency of BTO/MoO 3 heterostructures is investigated. RhB, a highly toxic, carcinogenic, and pollutant dye which is predominantly used in textile and food industries has been selected as a model dye to study the photocatalytic efficiency of BTO/MoO 3 heterostructures . The increased photocatalytic efficiency of BTO/MoO 3 structures than the individual layers was explained based on the combined effects of interface charge coupling, heterojunction band bending, and redistribution of charge carriers.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures

Alex

Prabhakaran

Jayakrishnan

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

In this work, we proposed an efficient heterostructure photocatalyst by integrating the ferroelectric BaTiO3 (BTO) layer with the semiconductor MoO3 layer, availing the ferroelectric polarization of BaTiO3 and high generation of photoinduced charge carriers in the MoO3 layer. The effect of MoO3 layer thickness (t MoO3 ) on the photocatalytic efficiency of the BTO/MoO3 heterostructures is found to be optimum at t MoO3 = 67 nm as t MoO3 varies from 40 to 800 nm. The BTO/MoO3 heterostructure with t MoO3 = 67 nm exhibits a high efficiency of 86% for the degradation of rhodamine B (RhB) under the exposure of UV–visible light for 60 min. The photocatalysis rate kinetics analysis reveals that the rate constant in the heterostructure is 1.7 times of pure BTO and 3.2 times of pure MoO3 films. The enhanced photocatalytic activity in the heterostructures is attributed to the electric field-driven carrier separation due to the ferroelectric polarization and the heterojunction band bending. The charge coupling effect between BaTiO3 and MoO3 is evident from the current–voltage characteristics. The maximum lattice strain in the heterostructure with t MoO3 = 67 nm as evident from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL) analysis further confirms the charge transfer between the layers. The degradation as well as decolorization efficiency of the BTO/MoO3 heterostructure is higher than that of pure BTO and MoO3 films. Radical trapping experiments reveal that electrons are the major contributors to the photocatalytic activity of the BTO/MoO3 heterostructure. The reusability test shows only a reduction of 5% in the efficiency of the heterostructure after five photocatalysis cycles. The heterostructure can also efficiently decompose the other dyes such as rose bengal and methyl violet. Thus, our findings prove that an efficient and reusable photocatalyst can be designed through the integration of the ferroelectrics with the semiconductor layers.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures

Alex

Prabhakaran

Jayakrishnan

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…X-ray diffraction information reveals the microstructural details and different structural parameters. The lattice constants "a," "b," and "c" for h-MoO3 can be determined from the inter-planar spacing values of {h, k, l} planes with the Miller indices h, k, l by using the following equation [17]:…”

Section: X-ray Diffraction Studiesmentioning

confidence: 99%

Influence of Bio-Inspired Ag doped MoO3 Nanoparticles in the Seedling Growth and Inhibitory Action Against Microbial Organisms

Raj¹,

Bennie²,

Xavier³

et al. 2021

Preprint

View full text Add to dashboard Cite

Herein we report the hydrothermal synthesis, characterization and biological applications of h-MoO3 and silver doped MoO3 nanoparticles (NPs). The phase formation of the synthesized NPs was identified using X-ray diffraction studies and vibrational spectral studies. The average crystallite size of the NPs tends to decrease as the dopant concentration increases. The surface morphology and the elemental composition of the nanoparticles were observed from SEM and EDAX analysis. The crystallite nature was obtained from HRTEM images. The band gap energies obtained from UV-DRS spectra for h-MoO3 (3.26 eV) were starting to decrease as the concentration of the dopant Ag increases (3.22-2.76eV). The antibacterial activity of the prepared nanoparticles was tested against some gram positive and gram negative bacterial strains viz., Staphylococcus aureus, Bacillus cereus and Citrobacter koseri and Pseudomonas aeruginosa respectively. Also their seed germination properties were studied on foxtail and finger millet seeds for a period of seven days.

show abstract

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

et al. 2020

View full text Add to dashboard Cite

In this study, the effect of Ba doping content on the photocatalytic activity of (Zn1‐xBaxO (ZBO); x=0 to 0.2) thin films is investigated. The efficiency of ZBO photocatalyst for the decolorization of Rhodamine B (RhB) is found to be optimum at x=0.1. The Zn0.9Ba0.1O film exhibits an efficiency of ≈ 96% at an irradiation time of 60 min. The high photocatalytic activity of Ba doped ZnO films is attributed to the high efficient generation and separation of photo‐induced charge carriers as evident from photocurrent measurements. Further, the texture and the oxygen vacancies favor the photocatalytic activity as suggested by the x‐ray diffraction (XRD), scanning electron microscope (SEM), x‐ray photoelectron spectroscopy (XPS), Raman spectroscopy and photoluminescence (PL) analysis. Moreover, the reusability test reveals that the photocatalyst performance remains for at least six consecutive cycles without significant change. The higher efficiency and outstanding reusability of Zn0.9Ba0.1O make it a potential candidate for photocatalytic applications.

show abstract

Substrate temperature induced effect on microstructure, optical and photocatalytic activity of ultrasonic spray pyrolysis deposited MoO₃thin films

Cited by 22 publications

References 31 publications

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures

Influence of Bio-Inspired Ag doped MoO3 Nanoparticles in the Seedling Growth and Inhibitory Action Against Microbial Organisms

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

Contact Info

Product

Resources

About

Substrate temperature induced effect on microstructure, optical and photocatalytic activity of ultrasonic spray pyrolysis deposited MoO3thin films

Cited by 22 publications

References 31 publications

Charge Coupling Enhanced Photocatalytic Activity of BaTiO3/MoO3 Heterostructures

Charge Coupling Enhanced Photocatalytic Activity of BaTiO3/MoO3 Heterostructures

Influence of Bio-Inspired Ag doped MoO3 Nanoparticles in the Seedling Growth and Inhibitory Action Against Microbial Organisms

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

Contact Info

Product

Resources

About

Substrate temperature induced effect on microstructure, optical and photocatalytic activity of ultrasonic spray pyrolysis deposited MoO₃thin films

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures

Charge Coupling Enhanced Photocatalytic Activity of BaTiO₃/MoO₃ Heterostructures