title: One-pot synthesis of Ni doped CdS nanosheets for near infrared emission and excellent photocatalytic materials for degradation of MB dye under UV and sunlight irradiation.
abstract: Undoped CdS nanostructures and Ni (3%, 5% and 7%) doped CdS nanosheets were synthesized via template-free one pot solvothermal method. The synthesized products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy (RS), UV-visible (UV-vis.) spectroscopy, and photoluminescence (PL) spectroscopy techniques. The Ni doped CdS nanosheets excited by 2.75eV revealed two weak near-infrared emission bands at 2.02 and 1.73eV. These two bands may be due to transition from of d electronic state of Ni to hybridized (p-d) state of Ni ions and S. The photodegradation of MB dye with Ni doped nanosheets is more efficient under sunlight compared to UV light irradiation. The 3% Ni doped nanostructures act as an efficient photocatalyst. The presence of Ni2+generate electron and holes and prolonged the recombination rate by introducing the temporary trapping sites, which essentially causes to improve the photocatalytic efficiency of the synthesized samples.
authors.affiliation: Department of Physics, Motilal Nehru National Institute of Technology Allahabad, Allahabad 211004, India.
authors.forename: Bilal
authors.initials: B
authors.lastname: Ahmed
authors.affiliation: Department of Physics, Motilal Nehru National Institute of Technology Allahabad, Allahabad 211004, India. Electronic address: animesh@mnnit.ac.in.
authors.forename: Animesh K
authors.initials: AK
authors.lastname: Ojha
authors.affiliation: Department of Physics, Motilal Nehru National Institute of Technology Allahabad, Allahabad 211004, India.
authors.forename: Sumeet
authors.initials: S
authors.lastname: Kumar
keywords: 2D sheets; CdS NPs; MB dye; Photocatalyst; TEM