Ni doped ZnS nanoparticles as photocatalyst: Can mixed phase be optimized for better performance?

Shah, Ekta; Vaghasiya, Jayraj V.; Soni, Saurabh S.; Panchal, C. J.; Suryavanshi, Priya; Chavda, Mukesh; Soni, Hemant

doi:10.1016/j.jece.2016.10.031

Cited by 11 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, some researchers have observed improved photo-catalytic activity in 0D, 1D and 2D ZnO and ZnS nanostructures upon Ni 2+ doping [18,[24][25][26][27][28]. Other researchers have reported FM in ZnO NC and discussed its origin related to Ni impurity [29,30].…”

Section: Introductionmentioning

confidence: 99%

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Kamran

2018

Nanotechnology

View full text Add to dashboard Cite

For the first time, 1D Ni ion doped CdS nanowires (NWs) were synthesized via chemical vapour deposition (CVD). The synthesized CdNiS NWs were single crystalline. We have reported here the investigation of optical, electrical and magnetic properties of prepared NWs for optoelectronic and spintronic applications. Successful incorporation of Ni ions in an individual CdS NW has been confirmed through several characterization tools: significantly higher angle and phonon mode shift were observed in the XRD and Raman spectra. SEM-EDX and XPS analysis also confirmed the presence of Ni ions. Room temperature photoluminescence (RT-PL) showed multiple peaks: two emission peaks in the visible region centered at 517.1 nm (green), 579.2 nm (orange), and a broad-band near infra-red (NIR) emission centered at 759.9 nm. The first peak showed 5 nm red shift upon Ni doping, hinting at the formation of exciton magnetic polarons (EMPs), and broad NIR emission was observed in both chlorides and bromides, which was assigned to d-d transition of Ni ions whose energy levels lying at 749.51 nm (13 342 cm) and 750.98 nm (13 316 cm) are very close to NIR emission. Orange emission not only remained at same peak position-its PL intensity was also significantly enhanced at 78 K; this was assigned to d-d transition (A → E) of Ni ions. It was observed that 11.4% Ni ion doping enhanced the conductivity of our sample around 20 times, and saturation magnetization (M) increased from 7.2 × 10 Am/Kg to 1.17 × 10 Am/Kg, which shows promise for optoelectronic and spintronic applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Kamran

2018

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…The acceptor density ( N A ) was calculated using the equation where e , ε, ε 0 , and N A are the electron charge (1.602 × 10 –19 C), dielectric constant (7.60 for Cu 2 O), permittivity of the vacuum (8.85 × 10 –14 F cm –1 ), and acceptor density (hole density in p-type Cu 2 O), respectively (Table S3). …”

Section: Resultsmentioning

confidence: 99%

Benzylic C_sp³–H Bond Oxidation on the (111) Facets of Octahedral Cu₂O Nanocrystals

Gupta

Machhi

Baraiya

et al. 2021

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

Octahedral-shaped Cu2O nanocrystals (o-Cu2O NCs) have been synthesized by the wet chemical method. By powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM), it was confirmed that the synthesized material was Cu2O NCs with octahedral morphology with the (111) facets exposed. The synthesized o-Cu2O NCs have been explored as the catalyst for benzylic sp3 C–H bond oxidation. Reaction parameters like oxidants, solvents, temperature, and reaction time were optimized for the model oxidation reaction involving diphenylmethane (DPM) as a substrate. The results obtained indicate that the substrate having benzylic sp3 C–H bond energy less than 90 kcal/mol can be easily oxidized to the corresponding carbonyl compound in the presence of these nanocrystals at RT with stirring the reaction mixture over the bar magnet (up to 92% conversion). The oxidation of Cu2O to CuO occurs all together with the progress of the reaction when carried out under typical aerial atmosphere in the presence of light (daylight and mercury compact fluorescent lamp (CFL) tubes prevailing in the laboratory). However, this can be avoided when the reaction was carried out in the dark or inert atmosphere or continuous flow of oxygen gas. A reaction mechanism has been proposed based on the free radical scavenger experiments and other special experiments. Also, the chemical events that occurred in the proposed reaction mechanism have been supported by mass spectral and electrochemical analysis, density functional theory (DFT) calculations, and some other special experiments. Furthermore, Brunauer–Emmett–Teller (BET) surface area analysis was carried out to confirm the catalytic effect due to facets. The experimental results also lead to proving the activation of O2 molecule through single electron transfer (SET) mechanism on the (111) facets of semiconducting Cu2O NCs in light.

show abstract

Photocorrosion inhibition of sulphide‐based nanomaterials for energy production through photocatalytic water splitting

Yaseen

Tahir

Wattoo

2021

Intl J of Energy Research

View full text Add to dashboard Cite

Summary To overcome the energy shortage and environmental pollution, sunlight is considered an ideal source to solve these problems. Photocatalyst water splitting for H2 production by using solar energy is a favourable technology to deal with the energy shortage, global warming and environmental pollution. During the last few years, sulphide‐based nanomaterial photocatalysts have attained considerable attention due to their comparatively narrow bandgap energy, show excitation in the visible region, at a wavelength of about 600 nm, and thus demonstrate high photocatalytic activities. But semiconductor photocatalysts are easy to be photocorroded due to sensitivity in visible light. The photocorrosion hinder their photocatalytic performance. In order to overcome photocorrosion effects, some modifications in the photocatalysts' surface are required, for example adjusting the metal sulphide structure, depositing anti‐photocorrosion layers or nanoparticles on the surface of semiconductors, which inhibit the photocorrosion attack and sustain the stability. In this review, we discuss progress in the structure, preparation methods, H2 evolution rate, photocorrosion inhibition and energy and environmental applications of different sulphide‐based nanomaterial photocatalysts.

show abstract

Ni doped ZnS nanoparticles as photocatalyst: Can mixed phase be optimized for better performance?

Cited by 11 publications

References 52 publications

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Benzylic C_sp³–H Bond Oxidation on the (111) Facets of Octahedral Cu₂O Nanocrystals

Photocorrosion inhibition of sulphide‐based nanomaterials for energy production through photocatalytic water splitting

Contact Info

Product

Resources

About

Ni doped ZnS nanoparticles as photocatalyst: Can mixed phase be optimized for better performance?

Cited by 11 publications

References 52 publications

Role of Ni2+(d8) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Role of Ni2+(d8) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Benzylic Csp3–H Bond Oxidation on the (111) Facets of Octahedral Cu2O Nanocrystals

Photocorrosion inhibition of sulphide‐based nanomaterials for energy production through photocatalytic water splitting

Contact Info

Product

Resources

About

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Role of Ni²⁺(d⁸) ions in electrical, optical and magnetic properties of CdS nanowires for optoelectronic and spintronic applications

Benzylic C_sp³–H Bond Oxidation on the (111) Facets of Octahedral Cu₂O Nanocrystals