skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Studies on the Fe3+ Doping Effect on Structural, Optical and Catalytic Properties of Hydrothermally Synthesized TiO2 Photocatalyst

Abstract

Pure TiO2 and Fe3+-TiO2 nanoparticles have been prepared by simple hydrothermal method with different Fe3+ concentrations. The synthesized nanoparticles are analysed to determine its structural, optical, morphological and compositional properties using X-ray diffraction, Raman, UV-DRS, photoluminescence, Mossbauer, XPS, TEM and SEM/EDS. The EDS micrograph confirms the existence of Fe3+ atoms in the TiO2 matrix with 0.85, 1.52 and 1.87 weight percent. The crystallite size and band gap decrease with increase in Fe3+concentration. The average particle size obtained from TEM is 7-11 nm which is in good agreement with XRD results. Raman bands at 640 cm-1, 517 cm-1 and 398 cm-1 further confirm pure phase anatase in all samples. XPS shows the proper substitutions of few sites of Ti4+ ions by Fe3+ ions in the TiO2 host lattice. The intensity of PL spectra for Fe3+-TiO2 shows a gradual decrease in the peak intensity with increasing Fe3+ concentration in TiO2, and it indicates lower recombination rate as Fe3+ ions increases. These nanoparticles are further studied for its photocatalytic activities using malachite green dye under UV light, visible light and sunlight.

Authors:
 [1];  [2];  [1];  [3];  [4];  [1]
  1. Department of Physics, Jaysingpur College, Jaysingpur-416101, India
  2. P.G. Department of Chemistry, Jaysingpur College, Jaysingpur-416101, Maharashtra, India
  3. Department of Physics, Shivaji University, Kolhapur-416004, India
  4. Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory (PNNL), Richland, WA 99352, United States
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1375369
Report Number(s):
PNNL-SA-121171
Journal ID: ISSN 2210-6812
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nanoscience &Nanotechnology-Asia; Journal Volume: 7; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; TiO2; Nanoparticle; hydrothermal; synthesis

Citation Formats

Kamble, Ravi, Sabale, Sandip, Chikode, Prashant, Puri, Vijaya, Yu, Xiao-Ying, and Mahajan, Smita. Studies on the Fe3+ Doping Effect on Structural, Optical and Catalytic Properties of Hydrothermally Synthesized TiO2 Photocatalyst. United States: N. p., 2017. Web. doi:10.2174/2210681207666161227160317.
Kamble, Ravi, Sabale, Sandip, Chikode, Prashant, Puri, Vijaya, Yu, Xiao-Ying, & Mahajan, Smita. Studies on the Fe3+ Doping Effect on Structural, Optical and Catalytic Properties of Hydrothermally Synthesized TiO2 Photocatalyst. United States. doi:10.2174/2210681207666161227160317.
Kamble, Ravi, Sabale, Sandip, Chikode, Prashant, Puri, Vijaya, Yu, Xiao-Ying, and Mahajan, Smita. 2017. "Studies on the Fe3+ Doping Effect on Structural, Optical and Catalytic Properties of Hydrothermally Synthesized TiO2 Photocatalyst". United States. doi:10.2174/2210681207666161227160317.
@article{osti_1375369,
title = {Studies on the Fe3+ Doping Effect on Structural, Optical and Catalytic Properties of Hydrothermally Synthesized TiO2 Photocatalyst},
author = {Kamble, Ravi and Sabale, Sandip and Chikode, Prashant and Puri, Vijaya and Yu, Xiao-Ying and Mahajan, Smita},
abstractNote = {Pure TiO2 and Fe3+-TiO2 nanoparticles have been prepared by simple hydrothermal method with different Fe3+ concentrations. The synthesized nanoparticles are analysed to determine its structural, optical, morphological and compositional properties using X-ray diffraction, Raman, UV-DRS, photoluminescence, Mossbauer, XPS, TEM and SEM/EDS. The EDS micrograph confirms the existence of Fe3+ atoms in the TiO2 matrix with 0.85, 1.52 and 1.87 weight percent. The crystallite size and band gap decrease with increase in Fe3+concentration. The average particle size obtained from TEM is 7-11 nm which is in good agreement with XRD results. Raman bands at 640 cm-1, 517 cm-1 and 398 cm-1 further confirm pure phase anatase in all samples. XPS shows the proper substitutions of few sites of Ti4+ ions by Fe3+ ions in the TiO2 host lattice. The intensity of PL spectra for Fe3+-TiO2 shows a gradual decrease in the peak intensity with increasing Fe3+ concentration in TiO2, and it indicates lower recombination rate as Fe3+ ions increases. These nanoparticles are further studied for its photocatalytic activities using malachite green dye under UV light, visible light and sunlight.},
doi = {10.2174/2210681207666161227160317},
journal = {Nanoscience &Nanotechnology-Asia},
number = 2,
volume = 7,
place = {United States},
year = 2017,
month = 8
}
  • Al, Ce co-doped TiO{sub 2}/ZrO{sub 2} (TZ) nano composites have been prepared by hydrothermal method. The structural and optical properties of the obtained samples were investigated by X –ray diffraction (XRD) and UV-Visible spectroscopy respectively. It has been found that the crystallite size of all the samples was distributed in the range 9.19 to 17.41 nm. The content of anatase phase varied in the range 48.71 to 100% depending on doping. The dopant produced lattice strain in material and it was found between 0.027 - 0.069. A clear shift of absorption edge for different dopant has been observed from UV-Visible absorptionmore » spectra. The change in optical bandgap, refractive index, absorption co efficient and optical conductivity was also evaluated from absorption spectra.« less
  • This paper presents the structural and optical properties of magnesium doped zinc oxide nanoparticles synthesized by mechanochemical processing. ZnO nanoparticles of different crystallite size were synthesized by milling the precursor materials for 5 h in a high energy planetary ball mill in Zr{sub 2}O{sub 3} media. NaCl was added as diluent to control the reaction rate in order to avoid the growth of nanoparticles. The milled powders were heat treated at 600 deg. C and then NaCl was leached out using distilled water. X-ray Diffraction (XRD) technique was employed for the phase and crystallite size analysis of the nanoparticles. Crystallitemore » sizes were calculated from the XRD peak broadening using the Sherrer's formula. Scanning Electron Microscope was employed to analyze the particle morphology and size distribution of the Mg doped ZnO nanoparticles. Ultraviolet-Visible (Uv-Vis) spectroscope also was employed to analyze the optical absorption of the ZnO nano particles. Tauc plots were used to determine the energy gap of the nanoparticles samples.« less
  • Highlights: • Pure and Ni doped ZnO nanopowders were synthesized by low cost sonochemical method. • The optical properties of Zn{sub 1−x}Ni{sub x}O nanopowders can be tuned by varying Ni content. • The results reveal the solubility limit of Ni into ZnO matrix as below 8%. - Abstract: Zn{sub 1−x}Ni{sub x}O nanopowders with different Ni contents of x = 0.0, 0.04 and 0.08 were synthesized via cost effective sonochemical reaction method. X-ray diffraction (XRD) pattern reveals pure wurtzite phase of prepared nanostructures with no additional impurity peaks. The morphology and dimensions of nanoparticles were investigated using scanning electron microscope (SEM).more » A sharp and strong peak for first order optical mode for wurtzite zinc oxide (ZnO) structure was observed at ∼438 cm{sup −1} in Raman spectra. The calculated optical band gap (E{sub g}) from UV–vis transmission data was found to decrease with increase in Ni content. The observed red shift in E{sub g} with increasing Ni content in ZnO nanopowders were in agreement with band gap behaviours found in their photoluminescence (PL) spectra. The synthesised ZnO nanopowders with controlled band gap on Ni doping reveals their potential for use in various electronic and optical device applications. The results were discussed in detail.« less
  • Transition-metal dichalcogenides like molybdenum disulphide have intrigued intensive interest as two-dimensional (2D) materials beyond extensively studied graphene due to their unique electronic and optical properties. Here we report the hydrothermal synthesis of MoS{sub 2} nanostructures without the addition of any surfactants. The structural and optical properties of the synthesized samples were characterized by various techniques, including X-ray diffraction (XRD), UV-Vis absorption, photoluminescence (PL), and Raman analysis. XRD and Raman spectroscopic studies confirm the formation of hexagonal phase and well ordered stacking of S-Mo-S layers. The increased lattice parameters of MoS{sub 2} samples are due to the stress or strain inducedmore » bending and folding of the layers. The synthesized MoS{sub 2} nanostructures shows a large optical absorption in 300-700 nm region and strong luminescence at 640 nm. In addition, the optical results demonstrates the quantum confinement in layered d-electron material MoS{sub 2} that can lead to engineer its various properties for electronic and optoelectronic applications.« less
  • The reactive facing-target sputtering method was used to deposit WO{sub 3} thin films from a metal tungsten disk in an Ar+O{sub 2} mixture gas atmosphere at different sputtering pressures. X-ray diffraction, scanning electron microscopy (SEM), UV-visible spectrophotometer, and Raman studies were performed to study structural, surface morphology, and optical properties of the as-deposited and annealed samples. Annealing treatments were done in oxygen atmospheres. All the as-deposited films were amorphous in structure. The films annealed at 400 deg. C and deposited at 200 W show preferential orientation. SEM images show nanorodlike growth for the films deposited at a sputtering pressure ofmore » 0.15 Pa and annealed at 400 deg. C. The optical absorption edge of the as-deposited films prepared at the sputtering pressures of 0.8-0.15 Pa varied between 340 and 380 nm and shifted up to 480 nm when the samples were annealed at 400 deg. C. From Raman spectra, we observed the O-W{sup 6+}-O bonds, and the W{sup 6+}=O stretching mode of terminal atoms on the surface of WO{sub 3} microcrystalline grains. The crystal structures of the annealed films were of monoclinic phase. The suitability of the films for the WO{sub 3}/TiO{sub 2} heterogeneous photocatalyst are analyzed and discussed.« less