Visible-active photocatalytic behaviors observed in nanostructured lead chalcogenides PbX (X = S, Se, Te)

Journal Article · Fri Jan 15 00:00:00 EST 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4940304· OSTI ID:22492399

Qiao, Li-Na; Wang, H. C.; Shen, Y.; Lin, Yuan-Hua; Nan, Ce-Wen ^[1]

---

1. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

Nanostructured lead chalcogenides (PbX, X = Te, Se, S) were prepared via a simple hydrothermal method. The powder samples were characterized by XRD, SEM, SAED and DRS. Phase composition and microstructure analysis indicate that these samples are pure lead chalcogenides phases and have similar morphologies. These lead chalcogenides display efficient absorption in the UV-visible light range. The photocatalytic properties of lead chalcogenides nanoparticles were evaluated by the photodegradation of Congo red under UV-visible light irradiation in air atmosphere. The Congo red solution can be efficiently degraded under visible light in the presence of lead chalcogenides nanoparticles. The photocatalytic activities of lead chalcogenides generally increase with increasing their band gaps and shows no appreciable loss after repeated cycles. Our results may be useful for developing new photocatalyst systems responsive to visible light among narrow band gap semiconductors.

• OSTI ID: 22492399
• Journal Information: AIP Advances, Vol. 6, Issue 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
AMINES
AZO DYES
ELECTRON DIFFRACTION
HYDROTHERMAL SYNTHESIS
IRRADIATION
LEAD SELENIDES
LEAD SULFIDES
LEAD TELLURIDES
MICROSTRUCTURE
MORPHOLOGY
NANOPARTICLES
NANOSTRUCTURES
PHOTOCATALYSIS
POWDERS
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SULFONIC ACIDS
VISIBLE RADIATION
X-RAY DIFFRACTION