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標題: Ultrasonic chemical synthesis of CdS-reduced graphene oxide nanocomposites with an enhanced visible light photoactivity
作者: Yi-Chen Lin
Du-Cheng Tsai
Zue-Chin Chang
Fuh-Sheng Shieu
關鍵字: Reduce graphene oxide;Cadmium sulfide;Photocatalytic activity
Project: Applied Surface Science, Volume 440, Pages 1227-1234
In this study, we report a facile ultrasonic method to prepare a series of CdS and reduced graphene oxide (CdS/rGO) composites with different weight ratios of graphene at temperature as low as 70 °C for 20 min by employing ammonia as a complexing agent of Cd2+ ions and reducing agent of graphene oxide (GO). Pure CdS particles had a poor crystallinity and aggregated to large particles size. As GO was incorporated into CdS, a uniform dispersion of CdS particles with high crystallinity on rGO sheets was clearly observed. The as-prepared CdS/rGO composites have a wide and strong photo absorption in the visible region and display a substantially improved photocatalytic activity for the degradation of methylene blue under visible light irradiation by forming a heterojunction of rGO and CdS. However, too much rGO will shield the light of the active sites for the CdS nanoparticle surface and thus limit further improvement in the photocatalytic efficiency.
DOI: 10.1016/j.apsusc.2018.01.305
Appears in Collections:材料科學與工程學系

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