循環農業：農業廢棄物高價值化【環境工程學系/林坤儀特聘教授】
| 論文篇名 | 英文：Hydroxylation and sodium intercalation on g-C3N4 for photocatalytic removal of gaseous formaldehyde 中文：g-C3N4的羥基化和鈉插層光催化去除氣態甲醛 |
| 期刊名稱 | Carbon |
| 發表年份,卷數,起迄頁數 | 2021,175, 467-477 |
| 作者 | Hu, Chechia*; Tsai, Wei-Fan; Wei, Wei-Han; Lin, Kun-Yi Andrew(林坤儀)*; Liu, Miao-Ting; Nakagawa, Keizo |
| DOI | 10.1016/j.carbon.2021.01.112 |
| 中文摘要 | 在這項研究中，羥基改性/鈉插層 g-C3N4 被用作通過吸附和光催化氧化去除氣態甲醛 (HCHO) 的有效材料。在使用不同 NaOH 濃度的簡單回流反應中，g-C3N4 的表面接枝羥基 (‒OH) 基團與氣態 HCHO 形成內部氫鍵，而 Na 原子嵌入 g-C3N4 的層狀結構中以產生電子轉移路徑（層-Na-層）以改善光催化氧化的電荷分離。與裸 g-C3N4 相比，g-C3N4 的羥基化和 Na 嵌入顯著提高了其 HCHO 去除效率。改性 g-C3N4 的 HCHO 去除能力達到約 0.12 ppm g−1 min−1，是裸 g-C3N4 (<0.06 ppm g−1 min−1) 的兩倍。此外，修飾的 g-C3N4 至少重複使用三次，活性沒有任何下降。這項工作為通過羥基化和鈉嵌入修飾 g-C3N4 提供了一種簡便、簡單、快速的方法，以增強 HCHO 吸附和電子轉移，使其成為一種有前途的室內 HCHO 去除材料。 |
| 英文摘要 | In this study, hydroxyl-modified/Na-intercalated g-C3N4 was used as an effective material for the removal of gaseous formaldehyde (HCHO) through adsorption and photocatalytic oxidation. In a simple reflux reaction using different NaOH concentrations, the surface-grafted hydroxyl (‒OH) groups of g-C3N4 formed internal hydrogen bonds with gaseous HCHO, while the Na atoms intercalated into the layered structure of g-C3N4 to create an electron transfer path (layer‒Na‒layer) to improve charge separation for photocatalytic oxidation. The hydroxylation as well as Na intercalation of g-C3N4 significantly increased its HCHO removal efficiency compared with that of bare g-C3N4. The HCHO removal capacity of the modified g-C3N4 reached approximately 0.12 ppm g−1 min−1, which was twice that of bare g-C3N4 (<0.06 ppm g−1 min−1). Moreover, the modified g-C3N4 was reused at least thrice without any decline in activity. This work provides a facile, simple, and fast approach to the modification of g-C3N4 via hydroxylation and Na intercalation to enhance HCHO adsorption as well as electron transfer, rendering it a promising material for indoor HCHO removal. |
| 發表成果與本中心研究主題相關性 | 透過本研究可進一步建立開發本研究計算所需之觸媒材料，並釐清可適合應用之環境條件! |
