Insight into the Mechanism of Graphene Oxide Degradation via the Photo-Fenton Reaction.
Insight into the Mechanism of Graphene Oxide Degradation via the Photo-Fenton Reaction.
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DOI：
10.1021/jp503413s
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发表时间：
2014-05-15
期刊：
影响因子：
--
通讯作者：
Star A
中科院分区：
文献类型：
--
作者：
Bai H;Jiang W;Kotchey GP;Saidi WA;Bythell BJ;Jarvis JM;Marshall AG;Robinson RA;Star A
石墨烯代表了一种有吸引力的二维碳基纳米材料，在电子、电池、传感器和复合材料等应用中具有很大的前景。最近的工作表明，碳基纳米材料是可降解/可生物降解的，但很少有工作花费在确定降解过程中形成的产品。由于这些产品可能具有毒理学影响，可能会渗入环境或人体，因此随着碳基纳米材料的商业化，深入了解其机制和结构仍然很重要。我们提供了一个潜在的机制，通过光芬顿反应的氧化石墨烯降解的洞察。我们已经确定，在处理1天后，产生了中间氧化产物（MW为150-1000 Da）。在较长的反应时间（即，第2天和第3天），这些产物不再以高丰度存在，并且系统由石墨烯量子点（GQD）主导。根据FTIR、MS和NMR数据，提出了这些氧化产物的潜在结构，这些氧化产物由氧化的多环芳烃组成。
Graphene represents an attractive two-dimensional carbon-based nanomaterial that holds great promise for applications such as electronics, batteries, sensors, and composite materials. Recent work has demonstrated that carbon-based nanomaterials are degradable/biodegradable, but little work has been expended to identify products formed during the degradation process. As these products may have toxicological implications that could leach into the environment or the human body, insight into the mechanism and structural elucidation remain important as carbon-based nanomaterials become commercialized. We provide insight into a potential mechanism of graphene oxide degradation via the photo-Fenton reaction. We have determined that after 1 day of treatment intermediate oxidation products (with MW 150–1000 Da) were generated. Upon longer reaction times (i.e., days 2 and 3), these products were no longer present in high abundance, and the system was dominated by graphene quantum dots (GQDs). On the basis of FTIR, MS, and NMR data, potential structures for these oxidation products, which consist of oxidized polycyclic aromatic hydrocarbons, are proposed.
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影响因子：
13.6
作者：
Jonsson, Sofia;Persson, Ylva;Tysklind, Mats
通讯作者：
Tysklind, Mats
影响因子：
7.4
作者：
Kaiser, Nathan K.;Savory, Joshua J.;Marshall, Alan G.
通讯作者：
Marshall, Alan G.
影响因子：
4.4
作者：
BECKE, AD
通讯作者：
BECKE, AD
DOI：
10.1016/1044-0305(94)85001-1
发表时间：
1994-07-01
影响因子：
3.2
作者：
EMMETT, MR;CAPRIOLI, RM
通讯作者：
CAPRIOLI, RM
影响因子：
41.2
作者：
Geim, A. K.;Novoselov, K. S.
通讯作者：
Novoselov, K. S.