SnO2 nanoparticles embedded onto MoS2 nanoflakes- An efficient catalyst for photodegradation of methylene blue and photoreduction of hexavalent chromium

被引：17
作者：
Szkoda, M. [1 ,2 ]
Zarach, Z. [1 ]
Nadolska, M. [3 ]
Trykowski, G. [4 ]
Trzci, K. [1 ]
机构：
[1] Gdansk Univ Technol, Fac Chem, Dept Chem & Technol Funct Mat, Narutowicza 11-12, PL-80233 Gdansk, Poland
[2] Gdansk Univ Technol, Adv Mat Ctr, Ul Narutowicza 11-12, PL-80233 Gdansk, Poland
[3] Gdansk Univ Technol, Fac Appl Phys & Math, Narutowicza 11-12, PL-80233 Gdansk, Poland
[4] Nicolaus Copernicus Univ Torun, Fac Chem, Gagarina 7, PL-87100 Torun, Poland
来源：
ELECTROCHIMICA ACTA | 2022年 / 414卷
关键词：
MoS2-based photocatalysts; Photoreduction; Photodegradation; Methylene blue; Hexavalent chromium; FEW-LAYER MOS2; PHOTOCATALYTIC DEGRADATION; HYDROTHERMAL SYNTHESIS; HIGH-PERFORMANCE; TIO2; NANOSHEETS; NANOSTRUCTURES; HETEROJUNCTION; REDUCTION; HETEROSTRUCTURE;
D O I：
10.1016/j.electacta.2022.140173
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this work, a molybdenum disulfide/tin oxide (MoS2/SnO2) composite was successfully prepared via a hydrothermal method. The MoS2/SnO2 composite was used as a photocatalyst for photoreduction of hexavalent chromium and photodecomposition of methylene blue. It exhibited higher photocatalytic performance under-simulated solar light irradiation than MoS2 itself. The obtained material was characterized by several spectroscopic and microscopic techniques, namely X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). TEM images of the MoS2/SnO2 revealed that SnO2 nanoparticles were embedded into MoS2. Furthermore, photo degradation mechanism and the role of adsorption were discussed. The enhanced photocatalytic performance of MoS2/SnO2 composite can be directly attributed to the presence of SnO2, which may increase the separation efficiency of the electron-hole pairs. The 99.5% of MB removal was achieved after 5 minutes of illumination. To the best of our knowledge, it is one of the most photoactive MoS2-based photocatalysts for methylene blue (MB) photodecomposition. Moreover, the obtained composite was highly active against chromium (VI) photo reduction. This work provides evidence that the MoS2/SnO2 composite possesses enormous potential in photo-catalytic applications.
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页数：12
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