在H2O2分解中的表面化学和催化活性,是高溶解性基化活性碳的分解
Gauhar Mussabek1,2, Saule Baktygerey1,2, Yerzhan Taurbayev1
1Nanotechnological Laboratory of Open Type, Al-Farabi Kazakh National University 050040 Almaty Kazakhstan.
RSC advances
|September 16, 2024
概括
本研究介绍了一种 pyrolytic 方法,用于使用碳气体与一起使活性炭 (AC) 功能化. 由此产生的化AC表现出增强的热稳定性和对过氧化分解的催化活性.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 催化剂是一种催化剂.
背景情况:
- 活性炭 (AC) 是一种多功能材料,在吸附和催化中具有应用.
- 表面功能化对于为特定应用量身定制交流特性至关重要.
- 现有的交流化方法通常涉及等离子体或光子激活.
研究的目的:
- 开发一种新型的 pyrolytic 方法,用来使颗粒活性炭 (AC) 功能化.
- 为了研究碳水化合物 (HFC) 气体热处理对交流属性的影响.
- 描述由此产生的含组及其热稳定性.
主要方法:
- 在400-800°C时,用五乙烯和1,1,1,2-四乙烯对Norit 830 W AC进行 Pyrolytic 处理.
- 化学和元素分析 (例如XPS,FTIR-ATR,TGA,N2吸附).
- 固态19F核磁共振光谱. 固态19F核磁共振光谱.
主要成果:
- 在AC上成功移植,达到5.6%的重量负载.
- 在400°C以上观察到微孔结构收缩.
- 含的组表现出高温稳定性,最高可达1250°C.
- 通过调节温度来控制组组成 (基与半离子) .
- 化表面显示在甲醇中有效的H2O2分解.
结论:
- 拟议的 pyrolytic 方法为交流化提供了一种有效的,无等离子/无光子的途径.
- 实现了可调的表面化学和化AC的增强热稳定性.
- 功能化的AC显示了催化应用的潜力,例如H2O2分解.
相关概念视频
02:50Catalysis
26.8K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.8K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.7K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.7K
00:54Radical Formation: Homolysis
3.5K
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
3.5K
01:01Acid Halides to Carboxylic Acids: Hydrolysis
2.6K
Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
2.6K
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
17.9K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
17.9K
03:01Halogens
18.3K
Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group.
18.3K