Kumar Naveen, Kumar Bijender, Gupta Himanshu, Kumar Anuj
Department of Chemistry, S.D. College, Muzaffarnagar, MaaShakumbhari University, Saharanpur 251001, Uttar Pradesh, India.
Creative Research Centre for Nanocellulose Future Composites, InhaUniversity, 100, Inharo, Michuhol-gu, Incheon 22212, Republic of Korea.
Polymers (Basel). 2023 Jan 22;15(3):572. doi: 10.3390/polym15030572.
In this study, a graphene oxide/cellulose composite (GO-cellulose) was prepared usingcellulose and graphene oxide (GO) through ultrasonication, followed by the freeze-dried method. The Brunauer-Emmett-Teller (BET) specific surface area of GO-cellulose (~6.042 m/g) was higher compared to cellulose (1.023 m/g).The UV-Visible spectraindicated that the prepared GO-cellulose composite removedphenol efficiently from aqueous solutions with high adsorption power. The effectiveness of the composite for phenol adsorption was examinedunder diverse conditions.The results reveal that the composite optimally improved the adsorption at pH 7 with a dose of 0.125 g/30 L in about 40 min. The adsorption process showed that in optimum conditions, 86 ± 2% of phenol was removed in 40 min with an adsorption capacity of 6.192 mg g. The adsorption behavior was well fitted to the pseudo-second-order kinetic model and the Langmuir isotherms at all temperatures.The present study suggests that synthesized GO-cellulose is useful inthe removal of phenol pollutants from aqueous solutions.
在本研究中，通过超声处理，然后采用冷冻干燥法，使用纤维素和氧化石墨烯（GO）制备了氧化石墨烯/纤维素复合材料（GO-纤维素）。与纤维素（1.023 m²/g）相比，GO-纤维素的布鲁诺尔-埃米特-泰勒（BET）比表面积更高（约6.042 m²/g）。紫外可见光谱表明，制备的GO-纤维素复合材料具有高吸附能力，能有效从水溶液中去除苯酚。在不同条件下考察了该复合材料对苯酚吸附的有效性。结果表明，该复合材料在pH值为7、剂量为0.125 g/30 L的情况下，约40分钟内对吸附的改善效果最佳。吸附过程表明，在最佳条件下，40分钟内86±2%的苯酚被去除，吸附容量为6.192 mg/g。在所有温度下，吸附行为均很好地符合准二级动力学模型和朗缪尔等温线。本研究表明，合成的GO-纤维素可用于从水溶液中去除苯酚污染物。
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