In situ growth of Ag nanoparticles on pristine graphene and their applications in conductive ink
In situ growth of Ag nanoparticles on pristine graphene and their applications in conductive ink
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DOI：
10.1007/s11051-023-05751-0
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发表时间：
2023-05-01
影响因子：
2.5
通讯作者：
Yin，Jian-Zhong
中科院分区：
文献类型：
--
作者：
Zhu，Lei;Xu，Qin-Qin;Yin，Jian-Zhong
用Ag纳米颗粒修饰的石墨烯可以跨越缺陷并桥接相邻的石墨烯片以增强其导电性，使得复合材料比纯石墨烯更适合用于导电墨水的制备。在这项研究中，提出了一种简单的一锅法制备Ag NPs@石墨烯纳米复合材料。通过低速机械搅拌和低功率超声波剥离石墨以获得原始石墨烯，其具有比RGO更少的结构缺陷和本征缺陷。然后，以AgNO 3为前驱体，PVP为分散剂，葡萄糖为还原剂，将Ag纳米粒子原位负载到石墨烯上，解决了晶界和重叠缺陷的负面影响。均匀分散的Ag纳米颗粒被锚定在多层石墨烯片上或之间。Ag纳米粒子的平均粒径为56 nm。最后，将所制备的Ag NPs@石墨烯纳米复合材料作为导电填料制备了水性导电油墨。在最佳烧结温度和时间（150 °C，20 min）下，丝网印刷导电图案的方块电阻为21.6 mΩ sq−1，表明该导电油墨在印刷电子领域具有很大的应用潜力。
Graphene decorated with Ag nanoparticles can cross the defect and bridge the adjacent graphene sheets to enhance its conductivity, making the composite more suitable for conductive ink preparation rather than pure graphene. In this study, a facile one-pot method to prepare Ag NPs@graphene nanocomposite is proposed. Graphite is exfoliated by low-speed mechanical agitation and low-power ultrasonic to obtain pristine graphene, which has fewer structural defects and intrinsic defects than RGO. Then, Ag nanoparticles are in situ loaded on graphene with AgNO3as the precursor, PVP as the dispersant, and glucose as the reducing agent, solving the negative effect of grain boundaries and overlap defects. Uniformly dispersed Ag nanoparticles are obtained anchored on or between the multi-layer graphene sheets. The average size of Ag nanoparticles is 56 nm. Finally, the prepared Ag NPs@graphene nanocomposite is used as conductive filler to prepare water-based conductive ink. At the optimal sintering temperature and time (150 °C for 20 min), the square resistance of the conductive patterns printed by screen printing is 21.6 mΩ sq−1, indicating that the conductive ink has great potential applications in printed electronics.