Investigation of the properties of photocatalytically active Cu-doped Bi2S3 nanocomposite catalysts

Demir, Halil; Şahi̇n, Ömer; Baytar, Orhan; Horoz, Sabit

doi:10.1007/s10854-020-03582-6

Cited by 26 publications

(5 citation statements)

References 43 publications

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“…The obtained values are 1.589 eV, 1.591 eV, and 1.592 eV for Fe x Bi 2-x S 3 (x = 0.4,0.6, and 0.8 wt%) nanostructure respectively, and seen in figure 5(b). The small widening in the energy gap is due to more charge carrier generation produced with the incorporation of Fe doping in Bi 2 S 3 and the same nature has been seen in Cu-doped Bi 2 S 3 nanomaterials [48]. The small widening of the band-gap confirms the shrinking of size due to quantization effect [49] and correlated with the HR-TEM result.…”

Section: Optical Properties: Diffuse Reflectance Uv-vis Spectroscopy ...supporting

confidence: 72%

Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Darji,

Desai,

Deshpande

et al. 2023

Phys. Scr.

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In this study, Bi2S3 nanostructures doped with Iron (Fe) at various concentrations i.e., FexBi2-xS3 (x = 0.0, 0.4, 0.6, 0.8 wt%) were synthesized using the reverse micelle method. EDAX (Energy Dispersive Analysis of x-rays) has shown that the prepared samples are in stoichiometry without any kind of impurities. Rietveld refinement XRD (x-ray diffraction) pattern confirmed the orthorhombic crystal structure and showed good crystallinity of all the samples with increase in Fe content. The unit cell volume is found to be varied from 12.34 nm to 19.39 nm. HRTEM (High Resolution Transmission Electron Microscopy) has shown that the prepared nanostructures are nanorods and nanocylinders with high crystallinity and corroborates with our XRD results. Diffuse reflectance spectroscopy analysis indicated that the band gap has increased from 1.550 eV for pure Bi2S3 to 1.592 eV for Fe0.08Bi1.92S3 nanostructures reflecting the blue shift compared to bulk sample. The photoluminescence spectra (PL) recorded with 250 nm excitation wavelength for powder samples has shown that with increase in Iron concentration the intensity of 440 nm peak increases whereas the peaks at 470 nm and 510 nm decreases. The PL spectra is also recorded for nanostructures dispersed in liquid media and has shown that the peaks at 501 nm is observed while rest of the two peaks are quenched. Raman spectra dependent on temperature is obtained for FexBi2-xS3 (x = 0.0, 0.4, 0.6, 0.8 wt%) samples in pellet form in the range of 80 K to 280 K. All samples have shown B1g and Ag phonon modes with higher intensity. The Gruneisen parameter determined for B1g mode varies from 1.21 to 14.13 whereas for Ag mode it varies from 0.60 to 7.91 with the exception of a negative value of −3.10 for Fe0.06Bi1.94S3 sample. VSM (vibrating sample magnetometer) showed the diamagnetic behavior of Bi2S3 and ferromagnetic behaviour of FexBi2-xS3 (x = 0.0, 0.4, 0.6, 0.8 wt%) samples. The saturation magnetization is found to be reaching to a value of 127.5 emu gm−1 for 0.6 wt% of Fe doping in Bi2S3 and then decreases drastically to 40.34 emu gm−1 for 0.8 wt% Fe doping. The antibacterial efficacy showed that as Fe concentration increases, the MIC (minimal inhibitory concentration) fluctuates between 60 to 70 μg ml−1 and is found to be maximum for Fe0.08Bi1.92S3 sample. It is also found that Fe0.04Bi1.96S3 nanostructures show the lowest MIC value for Gram +ve and Gram –ve bacteria in comparison to Bi2S3 nanostructures.

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Section: Optical Properties: Diffuse Reflectance Uv-vis Spectroscopy ...supporting

confidence: 72%

Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Darji,

Desai,

Deshpande

et al. 2023

Phys. Scr.

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“…Recently, boosting the photocatalytic performance of Bi 2 S 3 through combining it with other semiconductors such as BiOCl/Cu [19], MoS 2 /BiVO 4 [20], AgIO 4 [21], Ag 6 Si 2 O 7 [22], and so on have been reported. Doping copper element has been also shown to be incredibly helpful for improving light harvesting properties of Bi 2 S 3 [23]. Other metals such as Mn [16] and dual Er/Yb [24] as impurities have resulted in the same observation in Bi 2 S 3 lattices which are assigned to the formation of new energy levels and easier charge transfer.…”

Section: Introductionmentioning

confidence: 98%

Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles

Dawi,

Padervand,

Bargahi

et al. 2023

Mater. Res. Express

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A visible-light-active plasmonic photocatalyst was prepared from bismuth sulfide particles modified with Ag-AgCl nanoparticles. The structure of the photocatalyst was analyzed using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), elemental mapping, nitrogen adsorption-desorption isotherms (BET-BJH), and diffuse reflectance spectroscopy (DRS). To evaluate the photocatalytic performance, Acid Blue 92 (AB92) azo dye was degraded in an aqueous solution under visible light illumination. It was found that 0.025 g of the photocatalyst was able to remove over 98% of the AB92 solution at a concentration of 15 ppm and pH 7.5, in accordance with pseudo-first-order kinetics. Superoxide anion radicals (O2-˙) are key components of the photodegradation pathway. Furthermore, the antibacterial activity of the material was investigated against E. coli and S. aureus under irradiation and dark conditions. Transmission electron microscopy (TEM) images of the treated cells showed that the plasmonic photocatalyst destroyed the gram-positive and gram-negative bacterial cell wall structures within two hours of treatment. It is possible that this was caused by efficient generation of destructive superoxide anion radicals on the surface of Ag-AgCl/Bi2S3 particles. 

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“…15 The sulfides of other non-transitional elements, such as tin, lead and bismuth sulfides are well explored and exhibited good photocatalytic, photovoltaic and energy storage performances. [16][17][18][19][20][21] Apart from those, antimony sulfide has also getting attention as a potential candidate for anode material in sodium and lithium ion battery applications due to its high specific capacity value. [22][23][24][25] The antimony sulfide reported as a Janus catalyst for the selective nitrogen reduction reaction 26 and also as a photovoltaic absorber material.…”

Section: Introductionmentioning

confidence: 99%

Electrical response of organic molecule supported preformed and in situ formed antimony sulfide nanoparticles under frequency conditions

2021

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Investigation of the properties of photocatalytically active Cu-doped Bi2S3 nanocomposite catalysts

Cited by 26 publications

References 43 publications

Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles

Electrical response of organic molecule supported preformed and in situ formed antimony sulfide nanoparticles under frequency conditions

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Investigation of the properties of photocatalytically active Cu-doped Bi2S3 nanocomposite catalysts

Cited by 26 publications

References 43 publications

Probing the effect of lightly doped Iron in Bi2S3 nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Probing the effect of lightly doped Iron in Bi2S3 nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles

Electrical response of organic molecule supported preformed and in situ formed antimony sulfide nanoparticles under frequency conditions

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Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity

Probing the effect of lightly doped Iron in Bi₂S₃ nanostructures on Physiochemical properties and efficacy in anti-microbial activity