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Laser‐Induced Reactive Deposition of Nanostructured CoS 2 ‐ and Co 2 CuS 4 ‐Based Films with Fenton Catalytic Properties
Author(s) -
Vála Lukáš,
Medlín Rostislav,
Koštejn Martin,
Karatodorov Stefan,
Jandová Věra,
Vavruňková Veronika,
Křenek Tomáš
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201801403
Subject(s) - chemistry , x ray photoelectron spectroscopy , scanning electron microscope , raman spectroscopy , substrate (aquarium) , pulsed laser deposition , laser ablation , analytical chemistry (journal) , thin film , deposition (geology) , chemical engineering , nanotechnology , laser , materials science , optics , paleontology , oceanography , physics , chromatography , sediment , engineering , composite material , biology , geology
Highly polymorphic cobalt sulfide represents attractive material because of its unique electronic, optical, magnetic, mechanical and catalytic properties. Pulsed laser irradiation of a solid CoS 2 target results in ablation and deposition of thin films on Ta and Cu substrate, which were analyzed using scanning electron microscopy, Raman and FTIR spectroscopy, X‐ray photoelectron spectroscopy, high resolution electron microscopy and electron diffraction. These complementary analyses revealed that the film on Ta consists of the parent cubic CoS 2 whereas the film on Cu exhibits a multiphase structure containing the cubic CoS 2 and cubic Co 2 CuS 4 . The ternary species is known as an active electrode material with relatively high energy density for electrochemical capacitors and proves interdiffusion events at the interface of copper and colliding CoS 2 particles. Such facile and one‐step process represents the first example of the Co 2 CuS 4 formation through ablative reactive deposition on unheated substrate and adds to very rare examples of reactive laser deposition of ablated metal sulfides on unheated surfaces. The CoS 2 ‐based films deposited on Ta and the Co 2 CuS 4 ‐based films deposited on Cu were examined for their catalytic effect in Fenton degradation of methylene blue (MB). Their efficiency to degrade MB is compared and discussed.