Cr(VI) Removal by Magnetic Carbon Nanocomposites Derived from Celluose at Different Carbonization Temperatures

Bin Qiu, Yiran Wang, Dezhi Sun, Qiang Wang, Xin Zhang, Brandon Weeks, Ryan O'Connor, Xiaohua Huang, Suying Wei, Zhanhu Guo

Research output: Contribution to journalArticle

Abstract

Magnetic carbon nanoadsorbents fabricated by using cellulose and Fe(NO3)(3) as the carbon and iron precursors have demonstrated great Cr(VI) removal performance. The magnetic carbon synthesized at a carbonization temperature of 700 degrees C and a heating rate of 10 degrees C min(-1) (MC7-10) has a greater Cr(VI) removal capacity (22.8 mg g(-1)) in neutral solutions due to its larger specific surface area (247.14 m(2) g(-1)). Moreover, the magnetic carbon fabricated at a carbonization temperature of 800 degrees C and a heating rate of 10 degrees C min(-1) (MC8-10) has the highest Cr(VI) removal capacity (278.8 mg g(-1)) in acidic solutions, much higher than those of cellulose (12.0 mg g(-1)), zero valent iron (ZVI)/chitosan (55.8 mg g(-1)) and ZVI doped ordered mesoporous carbon (256.86 mg g(-1)). The high removal capacity was attributed to its higher content of ZVI and specific surface area (136.27 m(2) g(-1)) of MC8-10. The reduction of Cr(VI) to Cr(III) by the oxidation of carbon l
Original languageEnglish
Pages (from-to)9817-9825
JournalJournal of Materials Chemistry A
DOIs
StatePublished - 2015

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