Abstract

There is a piqued interest in development of biobased sorbents for water treatment. Here in we reported, the fabrication of mechanically strong nanopapers by mixed dimensional assembly of 1D Cellulose nanofibers and 2D amino functionalized graphene oxide for water treatment. The fabricated amino functionalized GO/ cellulose nanofiber (AMGO-CNF) nanopaper showed superior antibacterial resistance towards Escherichia coli MTCC 1610 and Klebsiella due to the enhanced surface roughness which was confirmed from SEM and AFM studies. The amino group present in the AMGO enhanced the adsorption efficiency of the nanopaper towards methyl orange dye. The fabricated nanopaper showed an adsorption of 11.05 mg/gm 30 mg/L concentration at pH 2. Maximum adsorption was observed at pH 2 which was due to protonation of amine group. Moreover, the fabricated membrane showed excellent hydrolytic stability which can be corroborated to the surface roughness and reduced hydrophilicity. The investigation into the surface chemistries of cellulose nanofibers beyond the adoption of toxic solvents can enhance the economic usefulness of the process and yield a new eco-friendly adsorbent material that is agreeable to adsorbing various toxic pollutants.

Graphic Abstract

摘要

对用于水处理的生物基吸附剂的开发引起了极大的兴趣。在这里，我们报道了通过一维纤维素纳米纤维和二维氨基官能化氧化石墨烯的混合尺寸组装来制造机械强度高的纳米纸，用于水处理。制备的氨基官能化GO /纤维素纳米纤维（AMGO-CNF）纳米纸对大肠杆菌MTCC 1610和克雷伯氏菌显示出优异的抗菌性由于提高了表面粗糙度，这已从SEM和AFM研究中得到证实。AMGO中存在的氨基提高了纳米纸对甲基橙染料的吸附效率。所制备的纳米纸在pH 2下显示出浓度为11.05 mg / gm 30 mg / L。在pH 2下观察到最大吸附，这是由于胺基的质子化。而且，制得的膜显示出优异的水解稳定性，可以证实其表面粗糙度和降低的亲水性。对纤维素纳米纤维的表面化学的研究，除了采用有毒溶剂之外，还可以提高该方法的经济实用性，并生产出一种新型的环保吸附材料，可以吸附各种有毒污染物。

图形摘要