Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India; Tata Steel R&D, Jamshedpur 831 007, India.
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
J Hazard Mater. 2016 Jan 15;301:127-36. doi: 10.1016/j.jhazmat.2015.08.042. Epub 2015 Aug 28.
A novel nanocomposite derived from cationically modified guar gum and in-situ incorporated SiO2 NP (cat-GG/SiO2) has been developed. The cat-GG has been synthesised by grafting poly(2-(diethylamino)ethyl methacrylate) on GG backbone. Various analyses endorse the suitability of cat-GG as well-organized template for the development of homogeneous SiO2 NPs. Dye adsorption studies predict that cat-GG/SiO2 efficiently and selectively adsorb anionic dyes (reactive blue-RB and Congo red-CR) from mixture of dye solutions. This is because of high surface area, multifunctional chelating H-bonding interactions and electrostatic interactions of cationic adsorbent with anionic dyes. Dyes adsorbed on the composite surface are desorbed reversibly using pH 10 stripping solution. Besides, cat-GG/SiO2 has been recycled efficiently with no prominent loss of dye uptake capacity, even after 4 adsorption-desorption cycles.
一种新型的纳米复合材料，由阳离子改性瓜尔胶和原位掺入的 SiO2 NP（cat-GG/SiO2）组成。cat-GG 是通过在 GG 主链上接枝聚（2-（二乙基氨基）乙基甲基丙烯酸酯）合成的。各种分析都证实了 cat-GG 作为均相 SiO2 NPs 开发的合适模板。染料吸附研究表明，cat-GG/SiO2 能够从染料混合溶液中高效、选择性地吸附阴离子染料（活性蓝-RB 和刚果红-CR）。这是因为阳离子吸附剂与阴离子染料之间具有高比表面积、多功能螯合氢键相互作用和静电相互作用。在 pH 10 的洗脱溶液中可以将吸附在复合材料表面的染料可逆解吸。此外，即使经过 4 次吸附-解吸循环，cat-GG/SiO2 也可以有效地回收，染料吸附容量没有明显损失。
