氧化物与石墨碳化物复合物异质连接,以获得高效的Z-方案光催化环境污染物降解性能
Sanjeevamuthu Suganthi1, Shanmugam Vignesh2, Jeyaperumal Kalyana Sundar2
1School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
Environmental research
|July 9, 2023
概括
一种新的氧化物/石墨碳化物 (Co3O4/g-C3N4) 复合物有效降解甲基色和甲基蓝色等有机污染物. 这种Z模式的异质连接增强了可见光下水疗的光催化活性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 光催化作用的光催化
背景情况:
- 石墨碳化物 (g-C3N4) 是一个有前途的可见光光催化剂.
- 开发高效的复合光催化剂对于环境修复至关重要.
- 氧化物 (Co3O4) 可以提高光催化性能.
研究的目的:
- 为了合成一个Co3O4/g-C3N4 Z方案的复合异质连接.
- 评估其对有机污染物的光催化降解效率.
- 为了阐明底层的光催化机制.
主要方法:
- 在超声波辅助下,对Co3O4/g-C3N4复合材料进行水热合成.
- 使用甲基色 (MO) 和甲基蓝色 (MB) 的光催化降解实验.
- 结构性,形态性和光学性质的表征.
- 火实验以确定光催化机制.
主要成果:
- 最佳的0.2M Co3O4/g-C3N4 (GCO2) 复合物在210分钟内显示了65.1%的MO和87.9%的MB降解.
- 复合材料表现出增强的可见光吸收和电荷分离效率.
- 在g-C3N4上的Co3O4纳米粒子改善了电荷传输和减少了重组.
- 基于实验证据提出了一个Z模式机制.
结论:
- 容易合成的Co3O4/g-C3N4Z模式异质连接是有效的.
- 这些复合材料在有机污染物降解方面表现出卓越的光催化活性.
- 性能提升归因于更好的充电动力学和可见光利用.
- 这项工作提出了可见光光催化水疗的可行策略.
更多相关视频
05:47Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
7.8K
08:30A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
Published on: October 6, 2022
2.3K
相关概念视频
01:34The Z-Scheme of Electron Transport in Photosynthesis
10.3K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
10.3K
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K