Synthesis of PdAg/Bi2WO6 nanocomposites for efficient photodegradation of rhodamine B under visible light irradiation

• Published in: Journal of the Australian Ceramic Society Vol. 58; no. 1; pp. 299 - 307
• Main Authors: Phuruangrat, Anukorn, Buapoon, Saowaluk, Bunluesak, Thanaporn, Suebsom, Piyada, Thongtem, Somchai, Thongtem, Titipun
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01-02-2022
• Subjects: Ceramics; Chemistry and Materials Science; Composites; Glass; Inorganic Chemistry; Materials Engineering; Materials Science; Natural Materials; WO; AgPd/Bi; Active species; Nanocomposites; Photocatalytic reaction
• ISSN: 2510-1560; 2510-1579
• DOI: 10.1007/s41779-021-00688-w

In this research, heterostructure PdAg/Bi
2
WO
6
nanocomposites as visible light-driven photocatalyst prepared by photodeposition method were studied for photodegradation of rhodamine B (RhB) under visible light irradiation. X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) results show that Pd
2+
and Ag
+
ions were reduced to form bimetallic PdAg nanoparticles on the orthorhombic Bi
2
WO
6
nanoplates by photoreduction reaction. The photodegradation of RhB showed that the loaded bimetallic PdAg nanoparticles can play the significant role in improving the photocatalytic performance of the pure Bi
2
WO
6
nanoplates and heterostructure Pd/Bi
2
WO
6
nanocomposites. Among them, the heterostructure Pd
0.7
Ag
0.3
/Bi
2
WO
6
nanocomposites can lead to the highest degradation rate of RhB solution under visible light irradiation which was attributed to the synergistic effect between bimetallic Pd and Ag loaded on top of Bi
2
WO
6
nanoplates by forming the Schottky barrier, suppressing the recombination of charge carriers and enhancing the photocatalytic reaction.