Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
J Colloid Interface Sci. 2012 Mar 1;369(1):381-7. doi: 10.1016/j.jcis.2011.12.023. Epub 2011 Dec 16.
SiO(2)/graphene composite was prepared through a simple two-step reaction, including the preparation of SiO(2)/graphene oxide and the reduction of graphene oxide (GO). The composite was characterized by UV-Vis spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscope, and X-ray photoelectron spectroscopy, and what is more, the adsorption behavior of as-synthesized SiO(2)/graphene composite was investigated. It was interestingly found that the composite shows high efficiency and high selectivity toward Pb(II) ion. The maximum adsorption capacity of SiO(2)/graphene composite for Pb(II) ion was found to be 113.6 mg g(-1), which was much higher than that of bare SiO(2) nanoparticles. The results indicated that SiO(2)/graphene composite with high adsorption efficiency and fast adsorption equilibrium can be used as a practical adsorbent for Pb(II) ion.
SiO(2)/石墨烯复合材料通过简单的两步反应制备，包括 SiO(2)/氧化石墨烯的制备和氧化石墨烯的还原。通过紫外可见光谱、傅里叶变换红外光谱、扫描电子显微镜和 X 射线光电子能谱对复合材料进行了表征，此外，还研究了合成的 SiO(2)/石墨烯复合材料的吸附行为。有趣的是，发现该复合材料对 Pb(II)离子具有高效和高选择性。SiO(2)/石墨烯复合材料对 Pb(II)离子的最大吸附容量为 113.6mg g(-1)，远高于裸 SiO(2)纳米粒子。结果表明，SiO(2)/石墨烯复合材料具有高效吸附和快速吸附平衡的特点，可用作 Pb(II)离子的实际吸附剂。
