Preparation of dispersible carbon nitride powder and fabrication of its thin films by wet-process

• Published in: Molecular Crystals and Liquid Crystals Vol. 768; no. 16; pp. 868 - 882
• Main Authors: Minato, Shota, Nagata, Hiroki, Matsuda, Masataka, Ohtani, Naoki
• Format: Journal Article
• Language: English; Japanese
• Published: Philadelphia Taylor & Francis 01.11.2024; Informa UK Limited; Taylor & Francis Ltd
• Subjects: Carbon; Carbon nitride; Deionization; Fabrication; Fluorescence; Graphitic carbon nitride; Low speed; Melamine; Methanol; photoluminescence; Production methods; Room temperature; Spin coating; Synthesis; Thin films; Urea
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2024.2377369

To establish a low-cost and environment-friendly method for producing blue fluorescent materials and their thin films, we investigated the conditions for synthesizing graphitic carbon nitride (g-C 3 N 4 ) powder from urea and melamine. We found that urea can be used to synthesize g-C 3 N 4 at lower annealing temperatures than melamine. The synthesized g-C 3 N 4 powder showed good dispersibility in deionized water and methanol, and it was found that relatively uniform g-C 3 N 4 thin films could be obtained by low-speed spin-coating, especially with highly volatile methanol dispersions. These results indicate that blue fluorescent thin films can be fabricated using a wet process at room temperature.