Synthesis of MoS2-TiO2 nanocomposite for enhanced photocatalytic and photoelectrochemical performance under visible light irradiation
Artikel i vetenskaplig tidskrift, 2018

In this work, we have prepared MoS2 nanoflakes modified TiO2 nanoparticles (MoS2-TiO2 nanocomposite) with varying concentration of MoS2 (2.5–10 wt.%) by a two-step hydrothermal synthesis method involving specific preparation conditions for the TiO2 nanoparticles and MoS2 nanoflakes. The prepared samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS) techniques. The photocatalytic activity of the pristine TiO2 nanoparticles and MoS2-TiO2 nanocomposite samples were evaluated by examining the photocatalytic degradation of Rhodamine B (RhB). The photoelectrochemical activity of these samples were measured by performing solar water splitting experiments under visible light irradiation. It was observed that the MoS2-TiO2 nanocomposite with 7.5 wt.% MoS2 exhibits highest photocatalytic and photoelectrochemical activity as it has the optimum amount of MoS2 nanoflakes which probably minimizes the recombination of photogenerated charge carriers as compared to other concentrations of MoS2 in MoS2-TiO2 nanocomposite and pristine TiO2 nanoparticles. In addition, a rather high photocatalytic reaction rate constant was observed for MoS2-TiO2 nanocomposite with 7.5 wt.% MoS2 nanoflakes.

Photocatalyst

TiO nanoparticles 2

Photoelectrochemical

MoS nanoflakes 2

Författare

Manan Mehta

Open University

Indian Institute of Technology Delhi

Aadesh P. Singh

Chalmers, Fysik, Kemisk fysik

Sandeeep Kumar

Indian Institute of Technology Delhi

Satheesh Krishnamurthy

Open University

Björn Wickman

Chalmers, Fysik, Kemisk fysik

Suddhasatwa Basu

Indian Institute of Technology Delhi

Vacuum

0042-207X (ISSN)

Vol. 155 675-681

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemi

DOI

10.1016/j.vacuum.2018.05.052

Mer information

Senast uppdaterat

2018-11-09