明胶银纳米复合材料封装的毛细管阵列用于甲醛的可视化比色分析  

Encapsulating gelatin-silver nanocomposites onto arrayed capillary tubes toward a visual colorimetric strategy for formaldehyde

作　　者：姜耀[1] 孙宗招 龙大成 段志强[1,2] 刘陵瑗 王雪 王桦[1,2] 

机构地区：[1]曲阜师范大学化学与化工学院,山东省生命有机分析重点实验室,山东曲阜273165 [2]济宁市功能材料与监测器件工程技术中心,山东三生新材料科技有限公司,山东济宁272000

出　　处：《化学传感器》2016年第4期32-37,共6页Chemical Sensors

基　　金：国家自然科学基金(21675099);国家科技部“星火计划”(2015GA105005);山东省西部经济隆起带基层科技人才计划(XB2016CX014)资助

摘　　要：以明胶为还原剂和稳定剂,借助低温速冻终止反应技术,一锅式合成了包含银纳米颗粒与银离子的明胶银纳米复合材料,进而将之共价修饰于经氨基化的毛细管内壁,制成对甲醛敏感的功能化毛细管阵列。通过毛细现象自动吸取样品,在碱性环境下,利用银纳米颗粒催化甲醛还原其中银离子,引起银颗粒的增长变色,实现了对水产品中甲醛的灵敏、快速、高通量、可视化的比色检测。Gelatin-silver nanocomposites were synthesized by the one-pot reactions using gelatin as the reductant and stable agent,which was skillfully stopped at a suitable reaction time by quick freezing.The so prepared nanocomposites containing simultaneously silver nanoparticles and silver ions were covalently encapsulated onto the amine-derivatized inner surface of arrayed capillary tubes serving as the functionalized platform for the rapid and high-throughput detection of formaldehyde.The formaldehyde-containing sample solutions were automatically sucked into the capillary tubes by the capillarity.Under the alkaline environment,formaldehyde would reduce silver ions catalyzed by silver nanoparticles in the gelatin-silver nanocomposites,so that the metallic silver could be deposited onto the surface of catalytic silver nanoparticles showing a visual color change.Subsequently,the developed visual colorimetric sensing system was employed to probe formaldehyde in aquatic products with high detection sensitivity.

关 键 词：明胶银纳米材料 毛细管阵列 毛细现象 甲醛 比色检测 

分 类 号：TB33[一般工业技术—材料科学与工程] O657.3[理学—分析化学]