Enhanced visible-light-driven Pd/Bi 2 WO 6 heterojunctions used for photodegradation of rhodamine B
- PDF / 2,319,783 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 117 Downloads / 257 Views
ORIGINAL PAPER
Enhanced visible‑light‑driven Pd/Bi2WO6 heterojunctions used for photodegradation of rhodamine B Thanaporn Bunluesak1 · Anukorn Phuruangrat1 · Jarupat Teppetcharat1 · Panudda Patiphatpanya2 · Phattranit Dumrongrojthanath3 · Somchai Thongtem4,5 · Titipun Thongtem2,5 Received: 14 March 2020 / Accepted: 10 October 2020 © Iranian Chemical Society 2020
Abstract Heterostructure Pd/Bi2WO6 nanocomposites as visible-light-driven photocatalyst used for degradation of rhodamine B (RhB) were prepared by a sonochemical-assisted deposition method. Phase, morphology, atomic vibration mode, oxidation state of element and optical properties of pure B i2WO6 and heterostructure Pd/Bi2WO6 nanocomposites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, Fast-Fourier-Transform electron diffraction and X-ray photoelectron spectroscopy. The analyses showed a mixed phase of face-centered cubic Pd structure as a minor phase and orthorhombic Bi2WO6 structure as a major phase with Pd nanoparticles supported on top of Bi2WO6 nanoplates. The photocatalytic performance of Bi2WO6 and Pd/Bi2WO6 was tested through photodegradation of rhodamine B (RhB) under visible light irradiation. In this research, the loaded Pd nanoparticles greatly increased the photodegradation of RhB under visible light irradiation. Heterostructure 10% Pd/Bi2WO6 nanocomposites showed the highest photocatalytic activity for RhB degradation under visible light irradiation because of the formation of Schottky barriers and promotion of interfacial charge-transfer kinetics between metallic nanoparticles and semiconducting nanoplates. Keywords Pd/Bi2WO6 heterojunction · Photodegradation reaction · Spectroscopy
Introduction
* Anukorn Phuruangrat [email protected] * Titipun Thongtem [email protected] 1
Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
2
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
3
Rajamangala University of Technology Lanna Chiang Rai, Chiang Rai 57120, Thailand
4
Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
5
Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Toxic organic dyes present in wastewater from textile, paper and cosmetics industries are serious problems because they are highly carcinogenic and toxic to the environment and can cause major damage to living organisms [1–3]. Photocatalysis as green technology has been used for wastewater treatment by removing organic pollutants with low cost, environmental friendly, sustainability and repeatability by the use of artificial and natural light sources existing everywhere on Earth [1, 4]. TiO2 with a bandgap of 3.2 eV is the most interesting photocatalyst for environmental purification because it has high ch
Data Loading...
