One step synthesis of polyacrylamide functionalized graphene and its application in Pb(II) removal
One step synthesis of polyacrylamide functionalized graphene and its application in Pb(II) removal
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聚丙烯酰胺功能化石墨烯的一步合成及其在去除Pb(II)中的应用
DOI：
10.1016/j.apsusc.2014.07.155
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发表时间：
2014-10
影响因子：
6.7
通讯作者：
Liangsen Liu
中科院分区：
文献类型：
--
作者：
Lei Chen;Baodong Li;Jiarong Niu;Liangsen Liu
以氧化石墨（GO）为原料，丙烯酰胺为单体，采用γ射线辐照法在室温下制备了聚丙烯酰胺接枝石墨烯（PAM-g-graphene）。我们的策略包括通过原位自由基聚合将PAM链接枝在GO的表面上和层间，这导致GO剥离成单独的片。结果表明，PAM-g-石墨烯样品的接枝率为24.2%，厚度为2.59 nm。此外，所制备的PAM-g-graphene中含有PAM的氨基和少量的氧官能团，对Pb（II）离子具有上级吸附性能。吸附过程在30 min内达到平衡，吸附等温线符合Langmuir和Freundlich经典吸附等温线模型。PAM-g-石墨烯对Pb（II）的测定吸附容量为819.67 mg g-1（pH 6），分别是石墨烯纳米片和碳纳米管容量的20倍和8倍。这种化学改性石墨烯具有良好的通用性和适应性、优异的吸附能力和快速提取等特点，有望为全球性的水体重金属污染物去除问题提供新的思路。
Polyacrylamide grafted graphene (PAM-g-graphene) from graphite oxide (GO) was successfully prepared by γ-ray irradiation with acrylamide monomers in aqueous at room temperature in this paper. Our strategy involves the PAM chains graft on the surface and between the layers of GO by in situ radical polymerization which led to the exfoliation of GO into individual sheets. Results show that the degree of grafting of PAM-g-graphene samples is 24.2%, and the thickness is measured to be 2.59 nm. Moreover, the as-prepared PAM-g-graphene with some amino from PAM and little oxygen functional groups exhibit superior adsorption of Pb(II) ions. The adsorption processes reach equilibrium in just 30 min and the adsorption isotherms are described well by Langmuir and Freundlich classical isotherms models. The determined adsorption capacity of PAM-g-graphene is 819.67 mg g−1(pH 6) for Pb(II), which is 20 times and 8 times capacities of that for graphene nanosheets and carbon nanotubes according to reports, respectively. This chemically modified graphene synthesized by this fast one-step approach, featuring a good versatility and adaptability, excellent adsorption capacity and rapid extraction, may provide a new idea for the global problem of heavy metal pollutants’ removal in water.
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影响因子：
3.4
作者：
S. Chatterjee;B. T. T. Chu-B.-T.-T.-Chu-2262873342
通讯作者：
S. Chatterjee;B. T. T. Chu-B.-T.-T.-Chu-2262873342
DOI：
10.1016/j.saa.2013.09.088
发表时间：
2014-01-24
影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.5772/14665
发表时间：
2011-04
期刊：
--
影响因子：
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作者：
H. Salavagione;Gerardo Martínez;Gary Ellis
通讯作者：
H. Salavagione;Gerardo Martínez;Gary Ellis
影响因子：
15.6
作者：
Hou Wang;Xingzhong Yuan;Yan Wu;Hua-jun Huang;Xin Peng;G. Zeng;H. Zhong;Jie Liang;Miao-miao Ren-Miao
通讯作者：
Hou Wang;Xingzhong Yuan;Yan Wu;Hua-jun Huang;Xin Peng;G. Zeng;H. Zhong;Jie Liang;Miao-miao Ren-Miao