Ag2S nanoparticle encapsulated in mesoporous material nanoparticles and its application for photocatalytic degradation of dye in aqueous solution

作者：Pourahmad A^*

来源：Superlattices and Microstructures, 2012, 52(2): 276-287.

DOI：10.1016/j.spmi.2012.05.009

• Silver sulfide
• Semiconductor
• Nanocomposite
• Photocatalytic degradation
• Transmission electron microscopy

Semiconductor loaded mesoporous materials in general possess greater photocatalytic activity than pure semiconductors. Hence, with an attempt to achieve higher photocatalytic activity, Ag2S/MCM-41 photocatalysts were prepared by ion exchange method and used for the photocatalytic degradation of methylene blue. The materials were characterized by different analytical techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (IR) and BET (Brunauer-Emmert-Teller) experiments. The effect of Ag2S, MCM-41 support and different wt% of Ag2S over the support on the photocatalytic degradation and influence of parameters such as Ag2S loading, catalyst a mount, pH and initial concentration of dye on degradation are evaluated. The degradation reaction follows pseudo-first order kinetics. It was seen that 0.6 g/L of photocatalyst is an optimum value for the dosage of photocatalyst. The degradation efficiency was decreased in dye concentration above 3.2 ppm for dye.

• 出版日期2012-8