循环电压测量研究和太阳光辅助的CeFeO3/CeO2/Fe2O3复合材料的光催化活性
M Kanimozhi1, R Harikrishnan2, M Mani3
1PG and Research Department of Physics, Arignar Anna Govt. Arts College, Cheyyar, Tamil Nadu, India.
Luminescence : the journal of biological and chemical luminescence
|November 23, 2024
概括
这项研究证明了CeFeO3/CeO2/Fe2O3纳米复合物的使用,用于在UV可见光下降解甲蓝染料. 该材料表现出半导体特性和伪电容性行为,使其对污染物降解有效.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 环境化学环境化学
背景情况:
- 有机有毒染料,如甲蓝,对环境构成危险.
- 半导体纳米复合材料对光催化降解有希望.
- 了解相位组成和特性对于材料设计至关重要.
研究的目的:
- 为了合成和描述一个CeFeO3/CeO2/Fe2O3纳米复合材料.
- 为了研究其在太阳辐射下甲蓝色降解的光催化活性.
- 为了探索它的电化学特性,特别是伪电容.
主要方法:
- 使用微波辐射合成CeFeO3/CeO2/Fe2O3纳米复合材料.
- 通过瑞特维尔德精炼 (Fullprof,Match软件) 进行相位分析和结构性表征.
- 在UV可见光下进行光催化降解实验.
- 使用循环电压计 (CV) 进行电化学表征.
主要成果:
- 合成的材料含有CeFeO3 (正方体),CeO2 (立方体) 和Fe2O3 (由瑞特维尔德精炼确认的相).
- 微波辐射 (800W,30s周期) 导致CeFeO2和Fe2O3的副产品由于过热而形成.
- 纳米复合材料在紫外线可见光下有效降解了甲基蓝色.
- FTIR分析证实存在金属氧键,与瑞特维尔德精细的参数一致.
- TGA揭示了一种氧化过程,导致CeFeO3分解成CeO2和Fe2O3,并可观察到体重增加.
- CV曲线表明复合材料的伪容量行为.
结论:
- 该CeFeO3/CeO2/Fe2O3纳米复合材料证明了甲蓝的有效光催化降解.
- 该材料的半导体性质和伪电容性质是其性能的关键.
- 微波辅助合成为生产功能纳米复合材料提供了一种可控的方法.
相关概念视频
Voltammetric Techniques: Cyclic Voltammetry
369
Cyclic voltammetry (CV) is an electrochemical technique used to investigate the redox properties of a chemical species. It involves measuring the current response of an electrochemical cell as a function of the applied potential. The setup for cyclic voltammetry typically consists of a working electrode, a reference electrode, and a counter electrode—all immersed in an electrolyte solution. The working electrode is where the redox reaction of interest occurs, while the reference electrode...
369
Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K


