Terpyridine-based smart organic-inorganic hybrid gel as potential dye-adsorbing agent for water purification

摘要

A terpyridine-based organic-inorganic hybrid gelator possessing triethoxylsilane moiety was synthesized and its adsorption capacity for aromatic dyes in the absence and the presence of metal ions such as Zn2+and Cu2+was measured by UV-vis spectroscopy.From aqueous solutions of dyes,the hybrid gel,in the absence of metal ions,adsorbed 97.4% for basic blue 41,94.2% for crystal violet,and 41.5% for bromocresol green.When metal ion was present,the adsorption capacity of dried hybrid gel 1 for the anionic dye bromocresol green significantly increased due to the enhanced electrostatic interaction between cationic gel and anionic dye.Thus,this hybrid gel can efficiently adsorb various toxic dyes in water.