Synthesis and characterization of Mn:CdS nanoflower thin films prepared by hydrothermal method for photocatalytic activity

Al-Jawad, Selma M. H.; Imran, Natheer Jamal; Aboud, Kahlaa H.

doi:10.1007/s10971-021-05656-1

Cited by 25 publications

(5 citation statements)

References 44 publications

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“…When the Mn doping concentration increases, the physical shape of the individual particles appears to be more spherical than agglomerated. [32]. The micrographs clearly demonstrate that the synthesized nanocrystals have a smooth surface that appears spherical.…”

Section: Sem Analysismentioning

confidence: 85%

Study of structural, morphological and optical properties of Mn+2 doped CdS nanoparticles synthesized at various doping concentration

Ranjan,

Negi,

Choubey

et al. 2023

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Manganese-doped cadmium sulphide semiconductor nanoparticles (CdS: Mn) NPs have been created utilizing a microwave-assisted solvothermal technique at different Mn concentrations (0, 1%, 3%, and 5%). The chemicals utilized for the preparation of Mndoped CdS nanoparticles were sodium sulphide (Na2S.xH2O), manganese chloride (MnCl2.4H2O), and cadmium acetate (CH3COO)2Cd., H2O). To determine the structural dimensions of the generated nanoparticles, the Debye-Scherer equation was used to calculate the average crystallite size at the full-width half maximum (FWHM) of the diffraction peaks. FTIR spectra analysis was used to look at the various functional and vibrational groups present in the Mn-doped CdS nanoparticle sample. The structure features of the produced nanoparticles have been examined using X-ray diffraction patterns. Energy dispersive X-rays were employed to ascertain the chemical composition of the synthesized nanoparticles. The optical properties and quantification of the energy band gap of the nanoparticles have been done using UV-V spectroscopy. According to XRD calculations, the cubic zinc-blend structure of the generated NPs had a crystal size of between 4 and 7 nm. By using EDX spectroscopy, the incorporation of Mn at the CdS lattice was confirmed.

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Section: Sem Analysismentioning

confidence: 85%

Study of structural, morphological and optical properties of Mn+2 doped CdS nanoparticles synthesized at various doping concentration

Ranjan,

Negi,

Choubey

et al. 2023

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“…Previous reports by Ibrahim et al, suggested band gap values around 2.34 eV in Mn-doped CdS QDs, while Ganguly et al, reported a slight blue shift around 3.04 eV. Recently Jawad et al, reported a considerable red shift in Mn-doped CdS26 .The apparent shift of the band gap toward the blue spectrum, as indicated in Table2, highlights the quantum confinement effect arising from the diminished particle size within the nanoscale range. This emphasizes the influence of nitrogen in modifying the band gap.…”

mentioning

confidence: 83%

Adaptive Paramagnetism and Photoluminescence in Nitrogen Co-doped Mn: CdS Composite Quantum Dots

Reddy M,

Kumar Y B

2023

Orient. J. Chem

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Manganese-doped cadmium sulfide quantum dots (QDs), co-doped with nitrogen, were synthesized using the chemical co-precipitation method (CPM). Surfactant 2-mercaptoethanol (ME) was used to efficiently regulate the size of these QDs. X-ray diffraction (XRD) analyses verified that the particles fell within the nano-dimension, measuring between 1-2 nm. A Rietveld analysis with X’pert high score software (XPHS) proved that these synthesized QDs contained many phases. The energy dispersive X-ray spectroscopy (EDX) technique confirmed the successful incorporation of both manganese and nitrogen dopants into the CdS. Ultraviolet-visible analysis (UV-Vis) demonstrated a noticeable shift towards the blue end in the energy gap, indicating the presence of a quantum-confinement effect. The photoluminescence (PL) investigations revealed a significant emission peak at λ = 634 nm, linked to the transition from 4T1 to 6A1, attributed to the incorporation of Mn2+ within the CdS core. Electron paramagnetic spectroscopy (EPR) demonstrated paramagnetic characteristics. EPR assessments of the g factor (1.995) and hyperfine splitting constant (A) values (7 mT) verified the existence of nitrogen and manganese ions in the tetrahedral positions of the CdS core. The notable alterations noticed in the magnetic and optical characteristics of the fabricated quantum dots imply promising uses in optoelectronic and magneto-luminescent applications.

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“…For direct bandgap semiconductors, the forbidden bandwidth of the material can be calculated from hυ with [F(R)•hυ] 0.5 . [30,31] The calculated results are shown in Fig. 3(c), the forbidden bandwidth of CdS in cubic brillar zincite phase is 2.2 eV, and the doping of Mn gradually decreases the forbidden bandwidth of CdS.…”

Section: Characterization Of Catalystsmentioning

confidence: 95%

Mn doping improves the photocatalytic performance of CdS photocatalysts

Qi,

Li,

Zhang

et al. 2024

Preprint

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In recent years, CdS photocatalytic materials are known for their relatively narrow bandgap and high light-absorbing ability, which is favoured by a wide range of academics in the field of photocatalysis. However pure CdS photogenerated carriers are susceptible to complexation and photocorrosion, so the photocatalytic effect is not ideal. In order to improve the photocatalytic performance of CdS, to study the mechanisms of their modification, this thesis employs transition metal (Mn)-doped CdS to enhance its photocatalytic performance and improve photocorrosion. MnxCd1-xS in cubic sphalerite phase was prepared by hydrothermal method, the photocatalytic decolourisation of 50 mL of 10 mg/L MB by Mn0.2Cd0.8S at 240 min in the photocatalytic experiment was 90 %, with a reaction rate constant of 0.00982 min-1, 3.86 times that of the cubic sphalerite phase CdS. The reaction rate constant was 0.01102 min-1, which is 4.42 times greater than the hexagonal fibrous zinc ore phase CdS. The doping of Mn both led to an increase in the photocatalytic stability of CdS, the main active groups in the photocatalytic degradation of MB by MnxCd1-xS were all O2-·.

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Synthesis and characterization of Mn:CdS nanoflower thin films prepared by hydrothermal method for photocatalytic activity

Cited by 25 publications

References 44 publications

Study of structural, morphological and optical properties of Mn+2 doped CdS nanoparticles synthesized at various doping concentration

Study of structural, morphological and optical properties of Mn+2 doped CdS nanoparticles synthesized at various doping concentration

Adaptive Paramagnetism and Photoluminescence in Nitrogen Co-doped Mn: CdS Composite Quantum Dots

Mn doping improves the photocatalytic performance of CdS photocatalysts

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