학술논문
Chemically derived quinary Cu2 Co1–x Nax SnS4 photon absorber material and its photocatalytic application
Document Type
Original Paper
Author
Source
Applied Physics A: Materials Science & Processing. 130(4)
Subject
Language
English
ISSN
0947-8396
1432-0630
1432-0630
Abstract
The solar absorbing materials attract attention for the opto-electronic device applications such as solar cells and photocatalysis. Interest in photocatalytic materials to clean up the wastewater has started to increase. Generally, semiconductors sensitive to UV region are used. However, most of the light from the sun is in the visible region. Cu2 CoSnS4 is a promising material that exhibits superior photo-response in the visible regions with an appropriate band gap. In this study, Cu2 CoSnS4 films were prepared by the sol–gel method. Cu2 Co1–x Nax SnS4 was synthesized for the first time by partly substituting sodium with cobalt. With this approach, noticeable improvements were observed in the physical properties of the material. With the sodium replacement, the Cu2 Co1–x Nax SnS4 exhibited high photocatalytic performance toward the degradation of methylene blue (MB) under visible-light irradiation. According to the results, Cu2 CoSnS4 and Cu2 Co1–x Nax SnS4 samples degraded the MB solution by degradation efficacy values of 89.69% and 94.57%, respectively, in a short time like 40 min under visible light. This study shows that the substitution of sodium boosted the degradation efficiency by 5.4%. For the Cu2 CoSnS4 and Cu2 Co1–x Nax SnS4 samples, the computed reaction rate constants are 0.059 min−1 and 0.077 min−1 , respectively.