Designing spinel NiCr2O4 loaded Bi2O3 semiconductor hybrid for mitigating the charge recombination and tuned band gap for enhanced white light photocatalysis and antibacterial applications

Janani, B.; Syed, Asad; Thomas, Ajith M.; Al-Rashed, Sarah; Raju, Lija L.; Khan, S. Sudheer

doi:10.1016/j.jallcom.2021.158735

Cited by 50 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparatively, the conduction band (CB) position of BTO was more negative, and the valence band (VB) position of BO was more positive. Hence, according to the fact that pure BTO and BO both were p-type conductivity, it can be concluded that the produced BBTO composite was an interleaved type II and p–p heterojunction. ,,− Such energy band arrangement favored the separation of carriers in BBTO and promoted the photocatalytic efficiency. , …”

Section: Resultsmentioning

confidence: 96%

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Wang

Yan

Sun

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

The binary type II α-Bi 2 O 3 /Bi 12 TiO 20 heterojunction composite was successfully obtained by a simple hydrothermal process. The pH value and the Bi/Ti molar ratio were the key to form the α-Bi 2 O 3 /Bi 12 TiO 20 heterojunction. The α-Bi 2 O 3 nanobelts intertwined with the Bi 12 TiO 20 nanobelts to form a cross-shaped structure in the composite. The obvious red-shift can be detected in Raman spectra. UV−vis DRS also revealed that the effectively reduced band gap of the heterojunction composite led to sunlight absorption in a larger range. Meanwhile, the photocurrent responses and the EIS demonstrated that the combination of Bi 12 TiO 20 and α-Bi 2 O 3 significantly promoted the separation of photogenerated electron−hole pairs and suppressed their recombination, which was also confirmed by PL analysis. Furthermore, photocatalytic degradation experiments proved that the α-Bi 2 O 3 / Bi 12 TiO 20 heterojunction composite had excellent catalytic performance under visible light, whose rate constant value (k) was about 2.0 times that of pure α-Bi 2 O 3 and 4.5 times that of pure Bi 12 TiO 20 samples. A possible photocatalytic mechanism of α-Bi 2 O 3 /Bi 12 TiO 20 was also proposed based on p−p and type II heterojunction. It was concluded that the heterojunction structure markedly promoted the migration and separation of carriers to enhance its photoactivity.

show abstract

Section: Resultsmentioning

confidence: 96%

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Wang

Yan

Sun

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

“…Apparently, the intensity of the characteristic absorption band, in which its peak position is 358 nm, of TC steadily decreases as exposure duration increases, manifesting that the designed microplates have the capacity of removing by harvesting the visible light. For the purpose of quantificationally characterizing the photocatalytic activity of the resultant microplates, the following equation is applied to calculate the photocatalytic degradation rate: 45 where C 0 and C are the concentrations of TC solution without undergoing a photocatalytic process and irradiated by visible light at time t , respectively. Based on the above equation and the measured UV-vis absorption spectra, the irradiation time related TC removal efficiencies, in which BiOCl: x Sm 3+ microplates act as photocatalysts, are calculated, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…These results imply that the doping of Sm 3+ is an effective route to modify the visible light driven photocatalytic activity of BiOCl microplates. Apart from removal efficiency, the reaction kinetic ( K ) value is investigated by adopting the Langmuir–Hinshelwood model: 45 ln( C 0 / C ) = Kt where the exact meanings of C 0 , C and t have been confirmed in eqn (3). Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Improved visible light triggered photocatalytic activities of BiOCl photocatalysts via a synergistic effect of doping and heterojunction engineering

Wu¹,

Lai²,

Ji³

et al. 2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…The recycling experiments of repetitive cycles were performed for the photodegradation of methylene blue to evaluate the durability and stability of as-prepared material [59,60]. The Bi-doped Li-Co ferrites showed similar photocatalytic efficiency after three successive cycles (Figures 16 and 17).…”

Section: Reusabilitymentioning

confidence: 99%

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

Haider

Agboola

Al-Khalli

et al. 2021

Journal of Taibah University for Science

View full text Add to dashboard Cite

Photocatalytic ability of Lithium-Cobalt ferrites was improved by doping with Bi. For the synthesis of different compositions of Bi-doped Li-Co Ferrites, the Micro-Emulsion method was used. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) and Scanning Electron Microscopy (SEM) analyses confirmed its spinel structure and morphology. Bi-substituted Li-Co ferrites exhibit 93.8% and 83.9% degradation of methylene blue and crystal violet, respectively. While using scavenger this value of degradation of crystal violet exceeds up to 98.5%. The rate constants of LiCo 0.5 Bi 0.4 Fe 1.6 O 4 for methylene blue (MB) and crystal violet (CV) are 0.0203 and 0.01615 min −1 , respectively. The band gap energy value calculated using tauc plot is 2.70 eV and 3.95Ev for Li-Co ferrites and Bi-doped Li-Co ferrites, respectively. Electrochemical impedance spectroscopy (EIS) studies confirmed that the doping of Bi in Li-Co spinel ferrites enhances its conductance. The use of these ferrites for photocatalytic degradation is more beneficial because they can be easily separable afterwards due to their magnetic nature which is confirmed by studying the re-usability of the as-synthesized samples. Highlights• Li-Co ferrites and Bi-substituted Li-Co ferrites were synthesized by the micro-emulsion method. • XRD and FTIR confirmed their spinel structural features.• The prepared catalyst successfully degraded the MB ( > 90%) and CV ( > 80%).• Antibacterial studies of as-synthesized samples were also done for S. aureus (Positive Strain) and P. aeruginosa (Negative Strain) microorganisms.

show abstract

Designing spinel NiCr2O4 loaded Bi2O3 semiconductor hybrid for mitigating the charge recombination and tuned band gap for enhanced white light photocatalysis and antibacterial applications

Cited by 50 publications

References 29 publications

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Improved visible light triggered photocatalytic activities of BiOCl photocatalysts via a synergistic effect of doping and heterojunction engineering

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

Contact Info

Product

Resources

About

Designing spinel NiCr2O4 loaded Bi2O3 semiconductor hybrid for mitigating the charge recombination and tuned band gap for enhanced white light photocatalysis and antibacterial applications

Cited by 50 publications

References 29 publications

Preparation of Binary Type II α-Bi2O3/Bi12TiO20 Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Preparation of Binary Type II α-Bi2O3/Bi12TiO20 Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Improved visible light triggered photocatalytic activities of BiOCl photocatalysts via a synergistic effect of doping and heterojunction engineering

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

Contact Info

Product

Resources

About

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance