|
二维码（扫一下试试看！） |
| Cellulose-based Fluorescent Paper Sensor for Rapid on-site Detection of Fe³⁺ |
| Received:January 23, 2026 Revised:April 08, 2026 |
| DOI：10.11981/j.issn.1000-6842.2026.03.179 |
| Key Words:fluorescent probe;cellulose;iron ion recognition;drinking water |
| Fund Project:中国博士后基金面上项目2023M731166山东省博士后创新项目SDCX—ZG-202303084国家自然科学基金21908167中国博士后基金面上项目（2023M731166）；山东省博士后创新项目（SDCX—ZG-202303084）；国家自然科学基金（21908167）。 |
| Author Name | Affiliation | Postcode | | Xue Jiacheng* | College of Light Industry Science and Engineering， State Key Lab of Bio-based Fiber Materials， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | Shi Jiyuan | College of Light Industry Science and Engineering， State Key Lab of Bio-based Fiber Materials， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | Lu Shijian | College of Light Industry Science and Engineering， State Key Lab of Bio-based Fiber Materials， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | Yang Qiulin | College of Light Industry Science and Engineering， State Key Lab of Bio-based Fiber Materials， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | Huo Dan* | College of Light Industry Science and Engineering， State Key Lab of Bio-based Fiber Materials， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 |
|
| Hits: 69 |
| Download times: 19 |
| Abstract: |
| In this study， guanidinoacetic acid （GAA） and citric acid （CA） were used as materials to synthesize fluorescent conjugates （GCF） with an extended π-conjugated structure through decarboxylation-dehydration-condensation reaction. The hydroxyl groups of pulp fibers were esterified by carboxyl groups of GCF， and then the obtained GCF modified pulp processed into fluorescent paper （GCF-paper） to prepare an immobilized Fe3+ fluorescent probe platform. The results showed that the optimal preparation conditions for GCF were a molar ratio of GAA to CA of 1∶3， a reaction temperature of 140 ℃， and a reaction time of 60 min. Under these conditions， the prepared GCF emitted cyan-green fluorescence at an excitation wavelength of 365 nm. As little as 0.1 mg/L of Fe3+ could quench GCF fluorecence via the “coordination-electron transfer” mechanism， whereas Na+， K+， Ca2+， Mg2+， Zn2+， Cu2+， and Al3+ exhibited negligible response. Its high sensitivity met the detection requirements for the Fe3+ concentration limit （0.3 mg/L） specified in the Standards for Drinking Water Quality （GB 5749—2022）. The optimal preparation conditions for GCF-paper were an esterification temperature of 80 ℃ and an esterification time of 60 min. Compared with the unmodified paper， the difference in mechanical properties of GCF-paper was relatively small （<5%）. In addition， FT-IR analysis was performed to investigate the mechanism of Fe3+ causing fluorescence quenching in GCF-paper. |
| View Full Text View/Add Comment Download reader HTML |
