Adsorption of Phenol and Microwave-assisted Regeneration on Carbon Nanotube/Carbon Fabric Composites

作者：Wang Jung Pin^*; Yang Hsi Chi

来源：Disaster Advances, 2012, 5(4): 1430-1435.

• Activated carbon fabrics
• Chemical vapor adsorption
• Carbon nanotubes
• Adsorption
• Phenol
• Microwave regeneration

This study develops an environmentally disaster prevention technology that can adsorb phenol from wastewater by using carbon nanotube (CNT)-activated carbon fabric (ACF) composites. Liquid-phase adsorption of phenol and regeneration efficiency on CNT-ACF composites has been investigated. The high-performance CNT-ACF composites can be prepared through a catalytic chemical vapor deposition approach. The growth technique is capable of decorating CNTs on microscaled ACFs, creating a hierarchical CNT-ACF composite. The as-grown nanotubes were found to have a tortuous shape and to be several micrometers in length. Experimental results showed that the as-prepared CNT-ACF composites exhibit high adsorption capacity of phenol and removal efficiency and the adsorption behavior is well characterized by Freundlich and Langmuir isotherms. An efficient microwave-assisted method is adopted to regenerate the exhausted CNT-ACF composites. After the microwave regeneration (720 W, 20 min) for two times, fairly-high regeneration efficiency of phenol (similar to 79.1%) can be achieved. The merit of the present work sheds some light on (i) the fabrication of CNT-ACF adsorbents with high removal efficiency of organic compounds and (ii) the rapid route to regenerate the exhausted adsorbents.

• 出版日期2012-10