Hierarchical porous cellulose/lanthanide hybrid materials as luminescent sensor

Wentao Fan，Jiaojiao Du，Junfeng Kou，Zeyu Zhang，Fengyi Liu

College of Chemistry and Chemical Engineering,Yunnan Normal University

摘 要：Photoluminescent hybrid materials containing carboxymethyl cellulose and lanthanide ions（Eu3+, Tb3+）were prepared by a facile method under ambient conditions. Lanthanide ions were covalently grafted to the cellulose framework through coordination with the carboxylic groups of the cellulose. Hybrid materials were fabricated as hydrogel and aerogel. As shown by SEM and pore parameters, aerogel materials which were obtained by supercritical CO₂ drying show hierarchical porous structure. The photoluminescence spectrum of the hybrid materials shows the characteristic red emission of Eu3+ ion and green emission of Tb³⁺. Further luminescent investigations reveal that these hybrid materials can detect Fe³⁺ with relative selectivity and high sensitivity, which suggests that the hybrid materials could be a promising luminescent probe for selectively sensing Fe³⁺ ion.

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