Boosting visible light photocatalysis of Ag6Si2O7/dandelion shaped Bi2S3 heterojunctions

Wang, Fangxiao; Liu, Zelin; Dong, Yu-Wei; Sun, Huaze

doi:10.1016/j.colsurfa.2022.128732

Cited by 14 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bi2S3 is a direct band gap semiconductor [29,30]. By plotting (αhν) 2 versus hv can exhibit the calculated Eg of Bi2S3-B is 1.33 eV.…”

Section: Structure and Compositionmentioning

confidence: 99%

See 1 more Smart Citation

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

Wu,

Chen,

Jiang

et al. 2023

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

The crystal structure and morphology of photocatalysts play a crucial role in determining their photocatalytic performance. In this study, we synthesized and investigated 1D/2D Bi2S3 as a potential visible-light-activated photocatalyst for the reduction of aqueous Cr(VI). The 1D/2D Bi2S3 was synthesized using hydrothermal synthesis technique by heating Bi2(H2O)2(SO4)2(OH)2 precursor and sodium sulfide at 190 ℃ for 24 h, where the molar ratio of Bi to S elements in the reaction reagents was changed from 1:6 to 2:3. The structure, composition, and optoelectronic properties of the prepared Bi2S3 were characterized using X-ray diffraction, UV-vis diffuse reflectance spectra, field emission scanning electron microscopy, electrochemical impedance spectra, and transient photocurrent. It is shown that the prepared orthorhombic Bi2S3 has full-spectrum photoresponsivity. Bi2S3-B with 1D/2D heterogeneous structure exhibits the lowest charge carrier transport resistance, and its photocurrent intensity is nearly twice that of Bi2S3-C. It demonstrates the highest photocatalytic activity in visible-light photocatalytic reduction of aqueous Cr(VI), with a reduction rate of 54.5% after 140 minutes of light exposure. According to the bandgap of Bi2S3 and radical scavenger experiments, a reaction mechanism for the photocatalytic reduction of Cr(VI) by Bi2S3 was proposed. Furthermore, the results highlight the economic and environmentally friendly nature of the hydrothermal synthesis method using homemade precursors, which allows for the regulation of Bi2S3 morphology and the enhancement of its visible photocatalytic activity. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

show abstract

“…Bi2S3 is a direct band gap semiconductor [29,30]. By plotting (αhν) 2 versus hv can exhibit the calculated Eg of Bi2S3-B is 1.33 eV.…”

Section: Structure and Compositionmentioning

confidence: 99%

“…It can be observed in Figure 4(a) that Bi2S3-B exhibits significant absorption of visible light between 400 nm and 700 nm. The band gap energy (Eg) of Bi2S3-B can be estimated from the Kubelka-Munk function in Equation ( 3) [29,30]:…”

Section: Structure and Compositionmentioning

confidence: 99%

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

Wu,

Chen,

Jiang

et al. 2023

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

show abstract

“…[3] Among them, the photocatalytic oxidation method has attracted widespread attention because of its outstanding advantages such as mild reaction conditions, small secondary pollution, high efficiency and high reusability performance. [4,5] BiOX (X = Cl, Br, I) materials have generated considerable interest in the direction of photocatalysis attributed to their excellent chemical stability, characteristic band structure and multiple morphologies. [6] Among them, Bi 12 O 17 Cl 2 , which has a narrow bandgap value, has the ability to use sunlight more efficiently, so it is considered to be an excellent n-type semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Flower‐Like Ag₆Si₂O₇/Bi₁₂O₁₇Cl₂ p‐n Heterojunctions: Enhanced Photocatalytic Activity and Mechanistic Insight**

Zhang¹,

Wang

2023

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Photocatalytic degradation is one of the effective ways to remove dyes. Accelerating the separation of photogenerated charge is an effective method for high efficiency visible‐driven catalysis. Here, a potential flower‐like Ag6Si2O7/Bi12O17Cl2 p‐n heterojunctions were successfully prepared. Ag6Si2O7/Bi12O17Cl2 can achieve light capture in a wider range of visible light and provide directional channel for carrier to achieve more efficient space charge separation. The constructed Ag6Si2O7/Bi12O17Cl2 showed excellent photocatalytic removal of 25 mg/L (100 mL) Rhodamine B (RhB) within 20 min. The rate constant for RhB degradation was 0.202 min−1 by Ag6Si2O7/Bi12O17Cl2‐2 which was more than 3.6 times greater than Bi12O17Cl2 (0.055 min−1) and 3.2 times greater than Ag6Si2O7 (0.063 min−1). In addition, the results of free radical capture experiment indicate the ⋅OH plays a leading role in the photocatalytic degradation of RhB and a possible Z‐scheme charge transfer paths and the formation of active species over Ag6Si2O7/Bi12O17Cl2 was proposed to elucidate the reaction mechanism.

show abstract

“…Several anti-photo corrosion strategies include ion imprinted polymer [15], element doped [16], cocatalyst coupling [17], and tandem heterojunction structures [18] have been reported to be efficient for the abovementioned goal. 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].…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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. 

show abstract

Boosting visible light photocatalysis of Ag6Si2O7/dandelion shaped Bi2S3 heterojunctions

Cited by 14 publications

References 45 publications

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

Flower‐Like Ag₆Si₂O₇/Bi₁₂O₁₇Cl₂ p‐n Heterojunctions: Enhanced Photocatalytic Activity and Mechanistic Insight**

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

Contact Info

Product

Resources

About

Boosting visible light photocatalysis of Ag6Si2O7/dandelion shaped Bi2S3 heterojunctions

Cited by 14 publications

References 45 publications

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

Flower‐Like Ag6Si2O7/Bi12O17Cl2 p‐n Heterojunctions: Enhanced Photocatalytic Activity and Mechanistic Insight**

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

Contact Info

Product

Resources

About

Flower‐Like Ag₆Si₂O₇/Bi₁₂O₁₇Cl₂ p‐n Heterojunctions: Enhanced Photocatalytic Activity and Mechanistic Insight**