Ag2Se-Graphene/TiO2 Nanocomposites, Sonochemical Synthesis and Enhanced Photocatalytic Properties Under Visible Light

作者：Meng Ze Da; Zhu Lei; Ghosh Trisha; Park Chong Yeon; Ullah Kefayat; Nikam Vikram; Oh Won Chun^*

来源：Bulletin of the Korean Chemical Society, 2012, 33(11): 3761-3766.

DOI：10.5012/bkcs.2012.33.11.3761

• Ag2Se
• Graphene
• UV-vis absorption spectra
• Visible light
• Rhodamine B

Ag2Se-Graphene/TiO2 composite was synthesized by a facile sonochemical method. The as-prepared products were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectrophotometer. During the reaction, both of the reduction of graphene oxide and loading of Ag2Se and TiO2 particles were achieved. The as-prepared Ag2Se-Graphene/TiO2 composites possessed great adsorptivity of dyes, extended light absorption range, and efficient charge separation properties simultaneously. Hence, in the photodegradation of rhodamine B (Rh.B), a significant enhancement in the reaction rate was observed with Ag2Se-Graphene/TiO2 composites, compared to the pure TiO2. The high activity can be attributed to the synergetic effects of high charge mobility, and red shift in absorption edge of Ag2Se-Graphene/TiO2 composites.

• 出版日期2012-11-20