Carbon coated TiO2 nanoparticles prepared by pulsed laser ablation in liquid, gaseous and supercritical CO2

Amandeep Singh; Turkka Salminen; Mari Honkanen; Juha Pekka Nikkanen; Tommi Vuorinen; Risto Kari; Jorma Vihinen; Erkki Levänen

doi:10.1088/1361-6528/ab53ba

Carbon coated TiO₂ nanoparticles prepared by pulsed laser ablation in liquid, gaseous and supercritical CO₂

Amandeep Singh (Corresponding Author), Turkka Salminen, Mari Honkanen, Juha Pekka Nikkanen, Tommi Vuorinen, Risto Kari, Jorma Vihinen, Erkki Levänen

BA5204 Materials processing and circular solutions

Tampere University

Research output: Contribution to journal › Article › Scientific › peer-review

9 Citations (Scopus)

Abstract

We report on the synthesis of TiO₂ nanoparticles using nanosecond pulse laser ablation of titanium in liquid, gaseous and supercritical CO₂. The produced particles were observed to be mainly anatase-TiO₂ with some rutile-TiO₂. In addition, the particles were covered by a carbon layer. Raman and x-ray diffraction data suggested that the rutile content increases with CO₂ pressure. The nanoparticle size decreased and size distribution became narrower with the increase in CO₂ pressure and temperature, however the variation trend was different for CO₂ pressure compared to temperature. Pulsed laser ablation in pressurized CO₂ is demonstrated as a single step method for making anatase-TiO₂/carbon nanoparticles throughout the pressure and temperature ranges 5-40 MPa and 30 °C-50 °C, respectively.

Original language	English
Article number	085602
Number of pages	12
Journal	Nanotechnology
Volume	31
Issue number	8
DOIs	https://doi.org/10.1088/1361-6528/ab53ba
Publication status	Published - 1 Jan 2020
MoE publication type	A1 Journal article-refereed

Funding

Keywords

anatase-TiO Raman XPS XRD
core shell particles
high pressure CO
metastable phase
nanoparticle size control
pulsed laser ablation
supercritical fluids

Access to Document

10.1088/1361-6528/ab53ba

Cite this

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title = "Carbon coated TiO2 nanoparticles prepared by pulsed laser ablation in liquid, gaseous and supercritical CO2",

abstract = "We report on the synthesis of TiO2 nanoparticles using nanosecond pulse laser ablation of titanium in liquid, gaseous and supercritical CO2. The produced particles were observed to be mainly anatase-TiO2 with some rutile-TiO2. In addition, the particles were covered by a carbon layer. Raman and x-ray diffraction data suggested that the rutile content increases with CO2 pressure. The nanoparticle size decreased and size distribution became narrower with the increase in CO2 pressure and temperature, however the variation trend was different for CO2 pressure compared to temperature. Pulsed laser ablation in pressurized CO2 is demonstrated as a single step method for making anatase-TiO2/carbon nanoparticles throughout the pressure and temperature ranges 5-40 MPa and 30 °C-50 °C, respectively.",

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AU - Singh, Amandeep

AU - Salminen, Turkka

AU - Honkanen, Mari

AU - Nikkanen, Juha Pekka

AU - Vuorinen, Tommi

AU - Kari, Risto

AU - Vihinen, Jorma

AU - Levänen, Erkki

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KW - pulsed laser ablation

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