Iron Impurities as the Active Sites for Peroxidase-like Catalytic Reaction on Graphene and Its Derivatives | |
Dong Y(董莹)1![]() ![]() ![]() ![]() ![]() | |
刊名 | ACS Applied Materials & Interfaces
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2015 | |
卷号 | 7期号:28页码:15403-15413 |
关键词 | defect-free graphene low-oxygen graphene graphene oxide iron-doped graphene oxide peroxidase-like activity |
ISSN号 | 1944-8244 |
通讯作者 | 李静 ; 郭志光 |
英文摘要 | We established four kinds of good dispersing systems of graphene and its derivatives with different structural characteristics to estimate their peroxidase-like activity. Besides graphene oxide (GO), it is demonstrated that defect-free graphene, low-oxygen graphene, and iron(III)-doped graphene oxide (GO-Fe) are all capable of H2O2 activation to oxidize peroxidase substrates. As for defect-free graphene, the dispersibility in reaction medium exerts great impact on its catalytic activity and our further judgements concerning the nature of active sites. Improved stability and further exfoliation of defect-free graphene in reaction medium are beneficial to the access of reactants to active sites on the basal planes and enhance its peroxidase-like activity, which is superior to that of low-oxygen graphene and much higher than that of GO. In addition, their peroxidase-like activity can be greatly inhibited by the addition of iron chelators. Interestingly, the introduction of trace ferric ions into GO does not lead to an apparent change except for remarkable increase of its peroxidase-like activity. Therefore, we propose that the observed iron impurities rather than the doped nonmetallic heteroatoms play an important role in the peroxidase-like activity of graphene and its derivatives. In this light, saturated iron(III) was immobilized onto the oxygen-donor coordination of GO to immensely promote its activity. The peroxidase-like activity of the prepared GO-Fe was systematically evaluated by using 3,3′,5,5′-tetramethylbenzidine and pyrogallol as peroxidase substrates and was compared to that of horseradish peroxidase and hemin. As a result, GO-Fe shows excellent peroxidase-like catalytic activity, which is comparable to that of hemin. Furthermore, GO-Fe was used for the quantitative detection of H2O2 and glucose. |
学科主题 | 材料科学与物理化学 |
收录类别 | SCI |
资助信息 | the National Natural Science Foundation of China (Nos. 21203217;11172301);the "Top Hundred Talents" Program of Chinese Academy of Sciences |
语种 | 英语 |
WOS记录号 | WOS:000358558300034 |
公开日期 | 2015-12-24 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/18523] ![]() |
专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Li J(李静); Guo ZG(郭志光); Li J(李静) |
作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Hubei Univ, Minist Educ, Key Lab Green Preparat & Applicat Funct Mat, Wuhan 430062, Peoples R China |
推荐引用方式 GB/T 7714 | Dong Y,Li J,Shi L,et al. Iron Impurities as the Active Sites for Peroxidase-like Catalytic Reaction on Graphene and Its Derivatives[J]. ACS Applied Materials & Interfaces,2015,7(28):15403-15413. |
APA | Dong Y.,Li J.,Shi L.,Guo ZG.,李静.,...&李静.(2015).Iron Impurities as the Active Sites for Peroxidase-like Catalytic Reaction on Graphene and Its Derivatives.ACS Applied Materials & Interfaces,7(28),15403-15413. |
MLA | Dong Y,et al."Iron Impurities as the Active Sites for Peroxidase-like Catalytic Reaction on Graphene and Its Derivatives".ACS Applied Materials & Interfaces 7.28(2015):15403-15413. |
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