罗达胺B的降解由氧硫酸激活与一个NiFe-LDH@CoFe-PBA复合物
Chunmiao Fan1, Dengjie Zhong1, Yunlan Xu1
1College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
Langmuir : the ACS journal of surfaces and colloids
|September 24, 2025
概括
一种新型的CoFe-PBA装载的NiFe-LDH催化剂使用过氧硫酸盐 (PMS) 有效地降解罗达胺B (RhB). 这种异质金属催化剂在环境修复应用中表现出高效率和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 罗达胺B (RhB) 是一种常见的污染物,需要有效的降解方法.
- 异质催化剂在环境应用中具有优势,因为它们易于分离和可重复使用.
- 氧硫酸盐 (PMS) 激活是一种有前途的先进氧化过程,用于去除污染物.
研究的目的:
- 为了合成和描述一种新的复合催化剂,NiFe-LDH@CoFe-PBA.
- 评估NiFe-LDH@CoFe-PBA用于使用PMS降解RhB的催化性能.
- 阐明催化机制并确定涉及的主要反应性氧物种 (ROS).
主要方法:
- 合成NiFe-LDH@CoFe-PBA复合材料的方法.
- 使用能量分散光谱,里埃变换红外光谱和X射线衍射进行了表征.
- 在各种条件下,使用PMS与合成的催化剂对RhB的降解实验.
- 通过机理学研究识别ROS.
主要成果:
- 通过表征证实NiFe-LDH@CoFe-PBA的成功合成.
- 在优化条件下在15分钟内达到98.99%的RhB降解 (50毫克L-1RhB,0.2克L-1催化剂,0.2克L-1PMS,pH6.36).
- CoFe-PBA增强了NiFe-LDH的分散性和活性位点,改善了电子转移和PMS激活.
- 单一氧 (1O2) 被确定为主要的ROS,负责RhB降解.
结论:
- NiFe-LDH@CoFe-PBA是一种高效,稳定和环保的异质催化剂,用于RhB降解.
- 复合催化剂有效地激活PMS,产生用于污染物清除的ROS.
- 这项工作提出了设计用于废水处理的先进金属基催化剂的新策略.
更多相关视频
16:41Detecting, Visualizing and Quantitating the Generation of Reactive Oxygen Species in an Amoeba Model System
Published on: November 5, 2013
16.6K
08:57Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases
Published on: February 24, 2018
10.5K
相关概念视频
02:23Alcohols from Carbonyl Compounds: Reduction
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
01:24Preparation of Aldehydes and Ketones from Nitriles and Carboxylic Acids
Although it is possible to reduce a carboxylic acid to an aldehyde, strong reducing agents, like lithium aluminum hydride (LAH), prohibit a controlled reduction, instead causing the generated aldehyde to instantly over-reduce to a primary alcohol.
Reducing carboxylic acid derivatives like acyl chlorides (RCOCl), esters (RCO2R′), and nitriles (RCN) using milder aluminum hydride agents like lithium tri-tert-butoxyaluminum hydride [LiAlH(O-t-Bu)3] and diisobutylaluminum hydride [DIBAL-H] allows...
Reducing carboxylic acid derivatives like acyl chlorides (RCOCl), esters (RCO2R′), and nitriles (RCN) using milder aluminum hydride agents like lithium tri-tert-butoxyaluminum hydride [LiAlH(O-t-Bu)3] and diisobutylaluminum hydride [DIBAL-H] allows...
01:17Carboxylic Acids to Primary Alcohols: Hydride Reduction
Carboxylic acids, upon reaction with strong reducing agents such as lithium aluminum hydride followed by hydrolysis, undergo reduction to form primary alcohols.
01:19Acid Halides to Alcohols: LiAlH4 Reduction
Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
01:20Amides to Amines: LiAlH4 Reduction
Amide reduction with strong reducing agents like lithium aluminum hydride proceeds through a nucleophilic acyl substitution to form amines. Primary, secondary, and tertiary amides yield primary, secondary, and tertiary amines, respectively.
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.
00:55Nitriles to Amines: LiAlH4 Reduction
Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...