Hydrothermal synthesis of CdS sub-microspheres for photocatalytic degradation of pharmaceuticals

Balushi, Bayan S.M. Al; Marzouqi, Faisal Al; Wahaibi, Bushra Al; Kuvarega, Alex T.; Al-Kindy, Salma M.Z.; Kim, Younghun; Selvaraj, Rengaraj

doi:10.1016/j.apsusc.2018.06.286

Cited by 81 publications

(20 citation statements)

References 44 publications

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“…The binding energy of the characteristic peaks for Cd 3d and S 2p over CdS‐300 °C‐4 h can be disclosed in the high‐resolution XPS spectra (Figure (b) and (c)). The main Cd 3d 5/2 and Cd 3d 3/2 peaks were centered at the binding energy at 404.77 and 411.54 eV, with Δ E of 6.77 eV, which are close to the reported results in the studies, suggesting the existence of Cd 2+ in CdS. The main spectrum of the S 2p and S 2s peaks were at binding energies of 161.37 and 225.22 eV, respectively, which is attributed to S 2− in CdS .…”

Section: Resultssupporting

confidence: 86%

“…The main spectrum of the S 2p and S 2s peaks were at binding energies of 161.37 and 225.22 eV, respectively, which is attributed to S 2− in CdS . Besides, there were no observation about the characteristic peaks of sulfur oxides with binding energies of 167–169 eV or elemental sulfur with 164 eV, further confirming the presence of sulfur in CdS was in the S −2 form . In addition, no characteristic spectra of CdSO 4 were observed, demonstrating that the precursor CdSO 4 · 8/3H 2 O was converted completely into CdS during the 4 h synthesis process at 300 °C.…”

Section: Resultsmentioning

confidence: 91%

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One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

et al. 2019

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Photocatalysts with 2D ultrathin nanosheet structures are gradually attracting significant interest from researchers because of their excellent photoelectric and physicochemical properties. However, the efficient fabrication of 2D CdS nanosheets with high crystallinity and ultrathin thickness still faces huge challenges. In this work, 2D ultrathin CdS nanosheets are synthesized through a simple one‐step solid‐phase strategy using CdSO4 · 8/3H2O as precursors in the CH4N2S atmosphere. The 2D ultrathin CdS nanosheet obtained by calcining at 300 °C for 4 h shows superior photocatalytic activity: the photocatalytic rate of hydrogen generation reaches 149.67 μmol h−1, and the corresponding apparent quantum efficiency is 36.7% at 450 nm. The enhanced photocatalytic activity and excellent photocatalytic stability are realized through the high crystallinity and ultrathin 2D nanosheet structure of CdS, which provide a high surface‐to‐volume ratio and enriched active adsorption sites. The 2D ultrathin nanosheet structure prevents the surface sulfide ions from being oxidized because of the extremely short interface distances and photocatalytic carrier transport, resulting in effective photocorrosion inhibition. Controlled experiments also show that the precursors ZnSO4 · 7H2O and Cd(Ac)2 · 2H2O are converted to 2D ZnS and CdS nanosheets through the one‐step solid‐phase method, illustrating that this simple one‐step solid‐phase strategy can be extended to the fabrication of other metal sulfide photocatalysts with 2D nanostructures.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 91%

One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

et al. 2019

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“…Characteristic diffraction peaks at 22.7 • , 32.4 • , 46.7 • , 52.3 • , 57.8 • , 67.9 • , 72.7 • , and 77.2 • matched with the diffraction peaks of NaNbO 3 (Qian et al, 2018). Characteristic diffraction peaks at 24.8 • , 26.5 • , 28.2 • , 43.7 • , 47.8 • , and 51.8 • matched with the diffraction peaks of CdS (AlBalushi et al, 2018). Characteristic diffraction peaks…”

mentioning

confidence: 72%

“…In Figure 2d, the multi-heterojunctions (NaNbO 3 -CdS, CdS-NiS 2 , NaNbO 3 -NiS 2 ) were tightly bound, and NiS 2 could be observed. The lattice spacing of 0.175, 0.391, and 0.283 nm were observed corresponding to CdS, NaNbO 3 , and NiS 2 , respectively (Ma et al, 2017;Al Balushi et al, 2018;Qian et al, 2018). In addition , Figures 2e-h show the microstructure of NC40% and CdS/NiS 2 .…”

Section: Photocatalytic Hydrogen Evolution Measurementmentioning

confidence: 94%

“…NaNbO 3 itself has excellent electrical conductivity and chemical stability. It not only acts as a carrier for CdS to increase the reaction surface with water but also forms a heterojunction with CdS, which can improve light irradiation stability and accelerate charge separation (Al Balushi et al, 2018). As an active site, NiS 2 can improve photocatalytic activity and facilitate the separation of electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

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Efficient and Stable Photocatalytic Hydrogen Evolution Activity of Multi-Heterojunction Composite Photocatalysts: CdS and NiS2 Co-modified NaNbO3 Nanocubes

Zhu

Niu

et al. 2020

Front. Chem.

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In this study, a NaNbO 3 /CdS/NiS 2 ternary composite photocatalyst containing no precious metals was successfully prepared by a simple hydrothermal method. The prepared ternary photocatalyst has a significant improvement in photocatalytic performance of hydrogen production from water splitting under visible light irradiation. The best sample NCN40% hydrogen production rate is 4.698 mmol g −1 h −1 , which is about 24.7 times that of pure CdS sample. In addition, the stability of the composite catalyst in the long-term photocatalytic hydrogen production cycle is also improved. The reason for the enhanced hydrogen production performance may be the optimization of the microstructure of the catalyst and the reduction of photogenerated electron-hole recombination. The construction of multi-heterojunctions (NaNbO 3-CdS, CdS-NiS 2 , and NaNbO 3-NiS 2) helps to reduce the recombination of carriers. Furthermore, the in-situ-formed NiS 2 nanoparticles can serve as active sites for hydrogen evolution. All of these factors induced the improved photocatalytic activity of the as-prepared ternary photocatalyst.

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Development of a novel and high performance visible‐light‐induced Cd₃OSO₄ nanophotocatalyst for degradation of diazinon

Kakhki

Ahsani

2020

Applied Organom Chemis

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One of the most important challenge in recent years is the removal and even better than that the degradation of poisons from environmental systems. Nanostructures due to their interesting properties are very suitable for this purpose. Herein, Cd3OSO4 nanomaterial was synthesized with a simple co precipitation method, characterized and was used, as a visible‐light‐driven photocatalyst in degradation of diazinon. The experimental conditions were also optimized. The results showed degradation efficiency is about 90%. Moreover, some kinetic studies were performed and showed this system obeys first order kinetics. Photo‐ oxidation mechanism was investigated in the presence of hole and electron scavengers. This is the first report on the investigation of the photocatalytic properties of Cd3OSO4 nanomaterial. The calculations of band gap of this new photocatalyst (1.85ev) showed its capability for application as a new visible light driven photocatlyst.

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Hydrothermal synthesis of CdS sub-microspheres for photocatalytic degradation of pharmaceuticals

Cited by 81 publications

References 44 publications

One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

Efficient and Stable Photocatalytic Hydrogen Evolution Activity of Multi-Heterojunction Composite Photocatalysts: CdS and NiS2 Co-modified NaNbO3 Nanocubes

Development of a novel and high performance visible‐light‐induced Cd₃OSO₄ nanophotocatalyst for degradation of diazinon

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Hydrothermal synthesis of CdS sub-microspheres for photocatalytic degradation of pharmaceuticals

Cited by 81 publications

References 44 publications

One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

One‐Step Solid‐Phase Synthesis of 2D Ultrathin CdS Nanosheets for Enhanced Visible‐Light Photocatalytic Hydrogen Evolution

Efficient and Stable Photocatalytic Hydrogen Evolution Activity of Multi-Heterojunction Composite Photocatalysts: CdS and NiS2 Co-modified NaNbO3 Nanocubes

Development of a novel and high performance visible‐light‐induced Cd3OSO4 nanophotocatalyst for degradation of diazinon

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Development of a novel and high performance visible‐light‐induced Cd₃OSO₄ nanophotocatalyst for degradation of diazinon