碱性浸洗处理对生物质基活性炭性能影响.pdfVIP

第33 卷第12 期 合肥工业大学学报( 自然 科 学 版 ) V ol. 33 No. 12 2010 年12 月 JOURNAL OF H EFEI UNIVERSITY OF TECH NOLOGY Dec. 2010 Doi: 10. 3969/ j. issn. 2010. 12. 025 李学良, 邢高瞻, 刘爱菊 ( , 230009) : ( SEMEDS) ( FTIR) , ( CV) ( EIS) , , , ; 3206 F/ g, 6 8% ; 500 989% , ( 906%) ; : ; ; :T Q12 . 11 : A :2010) 1218 004 Eff ect of alkaline solution treatment on properties of biomassbased activated carbon LI Xueliang, XING Gaozhan, LIU Aiju ( School of Chemical Engineering, Hefei U niver sity of T echnology, H efei 230009, China) Abstract: A commercial selfmade biomassbased activated carbon( AC) was treated by lye. T he chan ges in structure and composition of the treated carbons w ere characterized by SEMEDS and FTIR. The influence of surface treatment on the electrochemical performance of the carbons w as studied by cyclic voltammetry( CV) and electrochemical impedance spectroscopy( EIS) . T he results show that the silicate content of treated activated carbon decreases, and the surface of carboncarbon triple bond is introduced, as a result the electrochemical properties of the activated carbons significantly enhance. The specific capacitance of treated carbons by lye is 3206 F/ g, w hich increases by 6 8% compared w ith intact carbon, and after the cycle of 500 times the capacitance remains more than 989%, w hich is higher than the untreated carbon( 906% ) . CV curves of treated activated carbons show nicer re versibility and EIS ones show ideal electrochemical properties. Key words: activated carbon( AC) ; electrode material; supercapacitance [ 1] [ 2] [ 3- 5] , ( ) ,