Fabrication of CdS PbWO4 nanocomposite to improve the photocatalytic degradation efficiency of methylene blue under visible light irradiation

Rajendran, Ranjith; Jayaraman, Venkatesan; Krishnakumar, V.

doi:10.1016/j.jpcs.2019.01.015

Cited by 25 publications

(5 citation statements)

References 48 publications

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“…Because the semiconductor-based materials have a suitable band structure with the illuminated appropriate light source, the electrons, and holes are generated which can potentially produce hydroxyl radicals ( • OH) and superoxide radicals ( −• O 2 ) through various light-driven chemical reactions. Thus the widely-studied semiconductor photocatalysts are CeO 2 , ZnO, TiO 2 , CdS, Ta 3 N 5 , PbWO 3 , NiO, and BiFeO 3 are proved to be an effective photocatalyst [1][2][3][4][5][6][7][8][9]. Among the several semiconducting photocatalysis, TiO 2 has been considered a promising product in the photocatalytic process due to its high photocatalytic activity, chemical stability, non-toxicity, relatively inexpensive, and showing substantial UV light absorption.…”

Section: Introductionmentioning

confidence: 99%

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Kunnamareddy¹,

Rajendran

Megala

et al. 2021

J Inorg Organomet Polym

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In this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.

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Section: Introductionmentioning

confidence: 99%

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Kunnamareddy¹,

Rajendran

Megala

et al. 2021

J Inorg Organomet Polym

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“…The carrier transport characteristics and electrochemical impedance spectra of Bi 5 Ti 3 FeO 15 nanofibers were investigated, as displayed in Figure e. Generally, the smaller impedance arc diameter represents the smaller carrier transfer interface resistance. , It can be seen from Figure e that the nanofibers calcined at 700 °C have the smallest arc diameter than other nanofibers, suggesting that it has the smallest carrier transfer interface resistance and fastest interface carrier transport ability. Figure f shows transient piezocurrent density–time curves of nanofibers under ultrasonic vibration.…”

Section: Resultsmentioning

confidence: 99%

“…The carrier transport characteristics and electrochemical impedance spectra of Bi 5 Ti 3 FeO 15 nanofibers were investigated, as displayed in Figure7e. Generally, the smaller impedance arc diameter represents the smaller carrier transfer interface resistance.68,69 It can be seen from Figure7ethat the nanofibers calcined at 700 °C have the smallest arc diameter…”

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confidence: 94%

Bi₅Ti₃FeO₁₅ Nanofibers for Highly Efficient Piezocatalytic Degradation of Mixed Dyes and Antibiotics

Zhu

et al. 2023

ACS Appl. Nano Mater.

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A piezocatalyst with highly efficient catalytic efficiency toward multiple pollutants’ removal can improve treatment efficiency and reduce the consumption of catalysts, which is ideal for practical applications. Herein, Bi5Ti3FeO15 nanofibers were prepared using electrospinning and its excellent piezocatalytic performances for mixed dyes’ and antibiotics’ degradation were revealed. Rhodamine B (RhB) is degraded by 98% in 20 min, and the acquired reaction rate constant is 0.195 min–1 under ultrasonic vibration. Particularly, the mixed dyes of RhB, acid orange 7, methylene blue, and methyl orange are simultaneously degraded within 40 min, a high rate constant of 0.106 min–1 is achieved, and the degradation efficiencies can be always maintained at ∼100% for five consecutive cycles. The obtained rate constant for mixed dyes’ degradation is superior to many of the previously reported catalysts just toward one dye degradation. Furthermore, it is further demonstrated that tetracycline hydrochloride, bisphenol A, and phenol can be also efficiently degraded by 94, 90, and 79%, respectively, within 30 min. The piezocatalytic performances of nanofibers at different pH values and reaction temperatures were also explored. Catalytic mechanism investigations demonstrate that the optimized Bi5Ti3FeO15 nanofibers possess a weaker carrier recombination rate, smaller carrier transfer resistance, and higher carrier separation efficiency, which account for its superior piezocatalytic performance. This work reveals that Bi5Ti3FeO15 nanofiber is a superior catalyst for organic pollutants’ degradation under mechanical vibration and offers a strategy for the design of other high-performance piezocatalysts.

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“…The binding energy of Cd 3d 5/2 attributed to the Cd 2+ bonding state and the spin–orbit separation of 6.5 eV for Cd are in agreement with the previous data. 46 The peaks occuring in the range ∼160 eV–164 eV are associated with the binding energy of S 2− species. For S, the peaks are fitted with Gaussian functions for the deconvolution.…”

Section: Resultsmentioning

confidence: 99%

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm³⁺doped CdS quantum dots

Duy

Tan

et al. 2021

RSC Adv.

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Fabrication of CdS PbWO4 nanocomposite to improve the photocatalytic degradation efficiency of methylene blue under visible light irradiation

Cited by 25 publications

References 48 publications

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Bi₅Ti₃FeO₁₅ Nanofibers for Highly Efficient Piezocatalytic Degradation of Mixed Dyes and Antibiotics

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm³⁺doped CdS quantum dots

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Fabrication of CdS PbWO4 nanocomposite to improve the photocatalytic degradation efficiency of methylene blue under visible light irradiation

Cited by 25 publications

References 48 publications

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Bi5Ti3FeO15 Nanofibers for Highly Efficient Piezocatalytic Degradation of Mixed Dyes and Antibiotics

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+doped CdS quantum dots

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Product

Resources

About

Bi₅Ti₃FeO₁₅ Nanofibers for Highly Efficient Piezocatalytic Degradation of Mixed Dyes and Antibiotics

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm³⁺doped CdS quantum dots