N3C-缺陷调整的g-C3N4光催化剂:结构优化和增强的四环素降解性能
Yu Lu1,2, Chengbao Liu1,2,3, Leizhi Zheng1,2,3
1Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, China.
Nanomaterials (Basel, Switzerland)
|March 26, 2025
概括
将缺陷 (N3C) 引入石墨碳化物 (g-C3N4) 中可以提高光催化性能. 这种简单的方法提高了环境修复的效率,特别是降解四环素 (TC).
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 环境化学环境化学
背景情况:
- 石墨碳化物 (g-C3N4) 是一个有前途的光催化剂.
- 已知缺陷 (N3C) 可以改善g-C3N4的性能.
- 优化缺陷度是增强光催化活性的关键.
研究的目的:
- 为了准备g-C3N4与可调节的N3C缺陷度,使用一个简单的单步烧解方法.
- 研究N3C缺陷对g-C3的电子结构和光催化性能的影响.
- 为了评估N3C-修改的g-C3N4对四环素降解的光催化效率.
主要方法:
- 尿素和酸混合物的一步热解.
- 使用技术来确定缺陷度,表面积,带隙和电子结构的表征.
- 在可见光照射下使用四环素 (TC) 作为模型污染物的光催化降解实验.
主要成果:
- 可调节的N3C缺陷度已成功引入g-C3N4.
- N3C缺陷将导电带向下移动了0.12V,提高了减电能力.
- 特定表面积从44.07增加到87.08m2/g,带隙缩小到2.41 eV.
- 对TC降解的光催化活性达到54.8%,大约是原始g-C3N4的1.5倍.
- 观察到高稳定性,在四个循环后,效率仅下降5.4%.
结论:
- N3C缺陷工程策略有效地提高了g-C3N4的光催化性能.
- 修改后的g-C3N4显示出优越的可见光吸收和电荷分离效率.
- 这项工作为开发用于环境修复应用的基于g-C3N4的先进材料提供了途径.
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