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Synthesis and application of magnetic reduced graphene oxide composites for the removal of bisphenol A in aqueous solution-a mechanistic study
Wang, PL (Wang, Penglei); Zhou, X (Zhou, Xin); Zhang, YG (Zhang, Yagang); Wang, LL (Wang, Lulu); Zhi, KK (Zhi, Keke); Jiang, YF (Jiang, Yingfang)
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:104Pages:102348-102358
Abstract

Two kinds of magnetic reduced graphene oxide composites (MRGO) namely MRGO-1 and MRGO-2 with different reduction degrees are synthesized by a facile method. MRGO-2 is obtained by further reduction of MRGO-1 using hydrazine to obtain a relatively deeper reduction degree. Removal of bisphenol A (BPA) from aqueous solution using MRGO-1 and MRGO-2 is investigated. The kinetics and isotherm data of BPA absorbed by MRGO-1 and MRGO-2 are both well fitted with the pseudo-second-order kinetic model and the Langmuir isotherm, respectively. The maximum adsorption capacity of MRGO-1 and MRGO-2 for BPA obtained from the Langmuir isotherm is 92.98 mg g(-1) and 71.66 mg g(-1) at 288.15 K, respectively. Furthermore, the used MRGO-1 and MRGO-2 could be collected and recycled efficiently via an external magnet. The BPA adsorption capacity of the MRGO-1 still remained greater than 86% of the initial adsorption capacity after nine repeated absorption-desorption cycles. A thermodynamic study shows that the adsorption is a spontaneous and exothermic process. The maximum adsorption capacity of MRGO-1 for BPA is higher than that of MRGO-2, implying a deeper reduction process to MRGO-2 from MRGO-1 is not essential for the removal of BPA from aqueous solution. The energy is saved by omitting the deep reduction process. It is also found that if severe aggregation of graphene sheets in the deep reduction process to MRGO-2 from MRGO-1 can be alleviated, the corresponding absorption capacity of MRGO-2 for BPA may be greatly improved.

DOI10.1039/c6ra23542e
Indexed BySCI
WOS IDWOS:000387621700073
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5072
Collection资源化学研究室
Corresponding AuthorZhang, YG (Zhang, Yagang)
Affiliation1.Chinese Acad Sci, Ctr Green Chem, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Organ Funct Mat Lab, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xinjiang Inst Engn, Dept Chem & Environm Engn, Urumqi 830023, Peoples R China
Recommended Citation
GB/T 7714
Wang, PL ,Zhou, X ,Zhang, YG ,et al. Synthesis and application of magnetic reduced graphene oxide composites for the removal of bisphenol A in aqueous solution-a mechanistic study[J]. RSC ADVANCES,2016,6(104):102348-102358.
APA Wang, PL ,Zhou, X ,Zhang, YG ,Wang, LL ,Zhi, KK ,&Jiang, YF .(2016).Synthesis and application of magnetic reduced graphene oxide composites for the removal of bisphenol A in aqueous solution-a mechanistic study.RSC ADVANCES,6(104),102348-102358.
MLA Wang, PL ,et al."Synthesis and application of magnetic reduced graphene oxide composites for the removal of bisphenol A in aqueous solution-a mechanistic study".RSC ADVANCES 6.104(2016):102348-102358.
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