| 초록 |
Graphitic carbon nitride (CN) has been significantly considered as a promising metal-free candidate for solar hydrogen generations and water purifications because of its high thermal and chemical stability and appealing electronic structure. However, the practical applications of CN are still restricted due to its low water dispersibility and rapid charge recombination. Herein, we suggested a simple scalable process to synthesize highly water-soluble K-doped CN (KCN) for producing hydrogen in the presence of different dye molecules. Our experimental results showed a significant increase in water dispersibility of the obtained samples, up to 7 times, compared with the bulk one. Interestingly, the introduction of potassium into the carbon nitride framework facilitated the formation of structural defects on CN surfaces, hence retarding electron-hole pair recombination. Consequently, such KCN exhibited better photoactivity, which was approximately 12 times that of bulk CN for hydrogen production in the presence of triethanolamine (TEOA) in the solution. |
