Abstract Graphitic carbon nitride (g‐C3N4) has recently arisen at the forefront of researching in many areas. For this reason, the establishment of attractive and functional methodologies for the preparation of g‐C3N4 films and coatings to develop novel applications is very important. Therefore, this paper is focused on taken advantage of the functionalities of ultrasound-assisted liquid-phase exfoliation (UALPE) process and inkjet printing (IJP) technique for the fabrication of g‐C3N4 films. By an integral analysis, a stable and printable colloidal ink containing exfoliated g‐C3N4 with an average particle size of 263 nm was formulated. Reproducible and well-defined g‐C3N4 films with 10, 20 and 30 printing-passes have been obtained where the distinctive characteristic related to the automatic droplets’ deposition provided by IJP technique allowed an easy control on the spatial uniformity, thickness and transparency. Additionally, the inkjet printed g‐C3N4 films were evaluated as a fluorescence sensor exhibiting a good response in the presence of Ag+ aqueous solution. The strategy here reported can be exploited for the deposition of large-area and complex patterns of g‐C3N4 onto a variety of rigid and flexible substrates through the simple and low-cost UALPE and IJP approaches.

中文翻译：

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喷墨打印制备石墨氮化碳薄膜

摘要 石墨氮化碳 (g-C3N4) 最近出现在许多领域的研究前沿。因此，建立具有吸引力的功能性方法来制备 g-C3N4 薄膜和涂层以开发新的应用非常重要。因此，本文的重点是利用超声辅助液相剥离 (UALPE) 工艺和喷墨印刷 (IJP) 技术的功能来制备 g-C3N4 薄膜。通过积分分析，配制了一种稳定且可印刷的胶体油墨，其中含有平均粒径为 263 nm 的剥离 g-C3N4。具有 10 个可重复且定义明确的 g-C3N4 薄膜，已经获得了 20 和 30 次印刷，其中与 IJP 技术提供的自动液滴沉积相关的独特特征可以轻松控制空间均匀性、厚度和透明度。此外，喷墨印刷的 g-C3N4 薄膜被评估为一种在 Ag+ 水溶液存在下表现出良好响应的荧光传感器。本文报道的策略可用于通过简单且低成本的 UALPE 和 IJP 方法将 g-C3N4 的大面积和复杂图案沉积到各种刚性和柔性基板上。