School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China.
Global Centre for Environmental Remediation, University of Newcastle, Callaghan, NSW 2308, Australia.
Chemosphere. 2019 Mar;219:148-154. doi: 10.1016/j.chemosphere.2018.11.181. Epub 2018 Dec 3.
Graphene is usually synthesized through deoxygenation of graphene oxide (GO) by hydrazine which functions as a reducing agent, but the production of graphene via this method suffers a high cost and is often regarded to be not environmental-friendly. In this work, we developed a simple and efficient method for the green reduction of GO to reduced graphene oxide (rGO) dispersed on sugarcane bagasse derived from rGO/bagasse material. The rGO/bagasse was characterized by Scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, Thermogravimetric analysis, X-ray photoelectron spectroscopy and X-ray diffraction analysis. All these characterization techniques clearly revealed that the rGO has been successfully prepared by reduction sugars. In addition, rGO synthesized from bagasse was considered as a promising adsorbent for removing methyl blue. Adsorption kinetics were also applied to stimulate the adsorption process, and the adsorption behavior of this new adsorbent fits well with the pseudo-second-order kinetic model (R = 0.98). Finally, the cycling experiments for MB adsorption by bagasse synthesized rGO confirmed that the as-prepared rGO was reusable. Taken together, all results in this work provided the new insights into the green reduction of GO by bagasse, and the formation of rGO/bagasse material presented a great potential in the disposal of dye waste water.
石墨烯通常通过水合肼将氧化石墨烯（GO）脱氧来合成，水合肼在该过程中作为还原剂，但通过这种方法生产石墨烯成本高，且通常被认为不环保。在这项工作中，我们开发了一种简单有效的方法，通过将还原糖还原氧化石墨烯（rGO），将 rGO 分散在来源于 rGO/甘蔗渣复合材料的甘蔗渣上。通过扫描电子显微镜、傅里叶变换红外光谱、拉曼光谱、热重分析、X 射线光电子能谱和 X 射线衍射分析对 rGO/甘蔗渣进行了表征。所有这些表征技术都清楚地表明，rGO 已通过还原糖成功制备。此外，甘蔗渣合成的 rGO 被认为是一种很有前途的吸附剂，可用于去除亚甲基蓝。还应用吸附动力学来模拟吸附过程，这种新型吸附剂的吸附行为很好地符合拟二级动力学模型（R=0.98）。最后，通过甘蔗渣合成 rGO 对 MB 的吸附循环实验证实，所制备的 rGO 是可重复使用的。综上所述，这项工作的所有结果为通过甘蔗渣绿色还原 GO 提供了新的见解，rGO/甘蔗渣材料的形成在处理染料废水方面具有很大的潜力。
