Effect of alkaline treatment on photochemical activity and stability of Zn0.3Cd0.7S

Abideen, Zain Ul; Teng, Fei

doi:10.1016/j.apsusc.2018.09.195

Cited by 41 publications

(15 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The survey spectrum ( Figure 3a) shows that the sample is composed of Zn, Cd, and S. High-resolution XPS spectra of Zn 2p ( Figure 3b ) and Cd 3d ( Figure 3c ) exhibit a pair of symmetrical peaks with the binding energy of 1021.4 eV (Zn 2p 3/2 ), 1044.5 eV (Zn 2p 1/2 ), 404.9 eV (Cd 3d 5/2 ), and 411.7 eV (Cd 3d 3/2 ), respectively, indicating that the valence states of Zn and Cd elements are +2 [32,42,43]. As seen in Figure 3d, S 2p peaks located at 161.44 eV (S 2p 3/2 ) and 162.64 (S 2p 1/2 ) confirm the presence of S 2− in 0.3ZCS [26,29,31]. In addition, the binding energy of Zn 2p and Cd 3d in 0.3ZCS is slightly higher than that of ZnS and CdS, respectively (Figure 3b,c), as also reported by other studies [39,44].…”

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 66%

“…The binding energy of S 2p in 0.3ZCS is slightly higher than that of CdS, but is close to to that of ZnS ( Figure 3d). The shifts of the binding energies indicate the formation of a solid solution [29,39].…”

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 99%

“…On the other hand, although the E vb of xZCS (excluding x = 0.9 and 1) is less than the standard redox potential of • OH/OH − and cannot oxidize OH − to form • OH radicals, the photogenerated holes can directly oxidize the dyes [26,28,29].…”

Section: Optical Property and Band Structure Analysismentioning

confidence: 99%

“…Various methods, such as hard-template [30,31], microwave [28], coprecipitation [23], solvothermal [20,32], and hydrothermal [29,33,34], have been developed for the preparation of ZCS. In general, the hydrothermal route is a green and cost-effective technique to prepare highly crystallized samples with fewer defects; however, it has drawbacks, e.g., it is difficult to regulate the particle size of the product, and it requires a long reaction time [9,29,33,35]. Thus for ZCS preparation, an optimized hydrothermal procedure to decrease particle size and treatment time is highly desirable.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Ultrasonication-Assisted Synthesis of ZnxCd1−xS for Enhanced Visible-Light Photocatalytic Activity

et al. 2020

View full text Add to dashboard Cite

Zn x Cd 1−x S as a solid solution photocatalyst has attracted widespread attention for its unique adjustable band gap structure and good and stable performance. A novel synthesis approach for Zn x Cd 1−x S is still required to further improve its performance. In this study, we synthesized a series of Zn x Cd 1−x S (x = 0−1) solid solutions via an ultrasonication-assisted hydrothermal route. In comparison with conventional methods of preparation, the sample prepared by our innovative method showed enhanced photocatalytic activity for the degradation of a methyl orange (MO) solution under visible light due to its high crystallinity and small crystallite size. Furthermore, the composition and bandgap of Zn x Cd 1−x S can be tuned by adjusting the mole ratio of Zn 2+ /Cd 2+ . Zn 0.3 Cd 0.7 S shows the highest level of activity and stability for the degradation of MO with k = 0.85 h −1 , which is 2.2 times higher than that of CdS. The balance between band gap structure-directed redox capacity and light absorption of Zn 0.3 Cd 0.7 S accounts for its high photocatalytic performance, both of which are determined by the composition of the solid solution. Also, a degradation mechanism of MO over the sample is tentatively proposed. This study demonstrates a new strategy to synthesize highly efficient sulfide photocatalysts.

show abstract

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 66%

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 99%

Section: Optical Property and Band Structure Analysismentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Ultrasonication-Assisted Synthesis of ZnxCd1−xS for Enhanced Visible-Light Photocatalytic Activity

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The relatively intense band at about 408 nm corresponds to the near band edge (NBE) emission. The peaks at 422, 449, 468, 482 and 492 nm may be related to the surface or defect states [1].…”

Section: Photochemical Property Of Zno Microtubesmentioning

confidence: 99%

One‐step hydrothermal synthesis of ZnO microtubes with an efficient photocatalytic activity

Abideen

Shah

Teng

et al. 2020

Micro & Nano Letters

Self Cite

View full text Add to dashboard Cite

show abstract

Designing Robust CdS Nanostructures for Superior Photostability and Enhanced Photocatalytic Degradation of Organic Pollutants

Ul Abideen,

Bibi,

Liu

2024

ChemistrySelect

View full text Add to dashboard Cite

Till date it is a great challenge to synthesize CdS photocatalyst with a high stability. In this study, a stable CdS photocatalyst was successfully synthesized by a simple, cost‐effective hydrothermal route via cadmium acetate and thiourea as Cd and S precursors, respectively. The effect of different processing times (8 h and 24 h) and molar ratios on the photocatalytic activity and stability were mainly investigated. The samples were characterized in detail by XRD, FT‐IR, XPS, UV‐vis DRS, Photolummiscence spectroscopy and Surface photovoltage. The photocatalytic activity of the as‐obtained nanostructures was examined for methylene blue (MB) dye degradation under visible light irradiation (λ≥420 nm). After 70 min of irradiation, nearly 82 % of MB was degraded by CdS nanostructures, display an improved photocatalytic activity for MB degradation with an apparent rate constant (k) of 0.019 min−1. Additionally, CdS nanostructures sustained a good photostability after five consecutive cycles. The higher photocatalytic activity of CdS nanostructure is attributed to an efficient separation of photogenerated electron‐hole pairs stimulated by its optimal molar ratio, optimal temperature and surface morphology. Our synthesized stable nanostructures have potential for dye contaminated waste‐water treatment.

show abstract

Effect of alkaline treatment on photochemical activity and stability of Zn0.3Cd0.7S

Cited by 41 publications

References 79 publications

Ultrasonication-Assisted Synthesis of ZnxCd1−xS for Enhanced Visible-Light Photocatalytic Activity

Ultrasonication-Assisted Synthesis of ZnxCd1−xS for Enhanced Visible-Light Photocatalytic Activity

One‐step hydrothermal synthesis of ZnO microtubes with an efficient photocatalytic activity

Designing Robust CdS Nanostructures for Superior Photostability and Enhanced Photocatalytic Degradation of Organic Pollutants

Contact Info

Product

Resources

About