薛嘉成,史纪元,鲁世键,杨秋林,霍丹.纤维素基荧光纸传感器的构建及其对Fe3+的现场快速检测[J].中国造纸学报,2026,41(3):179-187 本文二维码信息
二维码(扫一下试试看!)
纤维素基荧光纸传感器的构建及其对Fe3+的现场快速检测
Cellulose-based Fluorescent Paper Sensor for Rapid on-site Detection of Fe³⁺
投稿时间:2026-01-23  修订日期:2026-04-08
DOI:10.11981/j.issn.1000-6842.2026.03.179
中文关键词:  荧光探针  纤维素  铁离子识别  饮用水
Key Words:fluorescent probe  cellulose  iron ion recognition  drinking water
基金项目: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)。
作者单位邮编
薛嘉成* 天津科技大学轻工科学与工程学院,生物基纤维材料全国重点实验室,天津,300457 300457
史纪元 天津科技大学轻工科学与工程学院,生物基纤维材料全国重点实验室,天津,300457 300457
鲁世键 天津科技大学轻工科学与工程学院,生物基纤维材料全国重点实验室,天津,300457 300457
杨秋林 天津科技大学轻工科学与工程学院,生物基纤维材料全国重点实验室,天津,300457 300457
霍丹* 天津科技大学轻工科学与工程学院,生物基纤维材料全国重点实验室,天津,300457 300457
摘要点击次数: 67
全文下载次数: 19
中文摘要:
      本研究以胍基乙酸(GAA)与柠檬酸(CA)为原料,通过脱羧-脱水-缩聚反应形成扩展π-共轭结构的荧光共轭物(GCF);GCF利用其表面羧基将纸浆纤维的羟基酯化,以得到的GCF改性纸浆抄造制备荧光纸(GCF-纸),以获得固定化Fe3+荧光探针平台。结果表明,GCF的最优制备条件为GAA与CA物质的量比1∶3、反应温度140 ℃、反应时间60 min,其可在激发波长365 nm下发出青绿色荧光,0.1 mg/L的Fe3+即可使GCF荧光猝灭,而对Na+、K+、Ca2+、Mg2+、Zn2+、Cu2+、Al3+等几乎无响应,其高灵敏度满足GB 5749—2022《生活饮用水卫生标准》中Fe3+含量检测的限值(0.3 mg/L)要求。GCF-纸的最佳制备条件为酯化温度80 ℃、酯化时间60 min,与未改性纸相比,其力学性能差异较小(<5%)。此外,红外光谱表征结果表明,Fe3+导致GCF-纸荧光猝灭归因于“络合-电子转移”机理。
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.
查看全文  查看/发表评论  下载PDF阅读器  HTML