Open AccessCos as Co-Catalyst for Enhancing the Tio2 Photoelectrochemical Water Splitting
Author(s) -
Mutia Agustina,
Amilia Linggawati,
Khuzaimah Arifin
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1351/1/012034
Subject(s) - photocatalysis , anatase , materials science , band gap , titanium dioxide , rutile , water splitting , scanning electron microscope , catalysis , semiconductor , cobalt sulfide , chemical engineering , hydrothermal circulation , electrochemistry , chemistry , optoelectronics , electrode , metallurgy , biochemistry , engineering , composite material
Titanium dioxide is a semiconductor that widely applied because it is environmentally friendly and has good catalytic activity. However, the wide band gap of TiO 2 limits its application in photocatalytic activities. Cobalt sulfide (CoS) is extensively used as a photocatode in photoelectochemistry because it has good electrochemical activity, low cost and non-toxic. The formation of p-n junction between TiO 2 and CoS can reduce the band gap of the former, and the load transfer of photoelectrochemical activity can be increased. TiO 2 /CoS is a promising photocatalyst in enhancing photoelectrochemical performance. In this work, a TiO 2 /CoS thin film was synthesized through hydrothermal method to study the effect of CoS on TiO 2 and improve the photoelectrochemical performance. Characterization were performed using X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and UV reflectance. Results showed that as-synthesized TiO 2 /CoS was a mixed phase of TiO 2 (anatase, rutile) and CoS with agglomerate-shaped small particles. The band gap of TiO2 was reduced after CoS was loaded at 2.75 eV. The density of as-synthesized sample was 1.2572 mA at 1 V compared with Ag/AgCl under light irradiation.