相关实验视频

Updated: Jul 14, 2025

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

异原子对与相关的小分子的电荷密度调节精确调节光催化生成的生成

Xiao Hai¹, Liqi Fang^2,3, Minghui Xiong^2,3

¹SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China.

|October 9, 2023

概括

用改性有机半导体显示出光催化进化的前景. 一种新的以烯为基础的催化剂在没有贵金属的情况下实现了高进化率,突出强调了.

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
有机半导体有机半导体

背景情况:

有机半导体为光催化提供可调节的特性.
有效的电荷分离对于光催化进化至关重要.

研究的目的:

开发一种有机半导体光催化剂,以实现高效的进化.
研究改在增强电子转移和催化活性中的作用.

主要方法:

用基修饰的烯分子的合成.
光催化进化速度测量.
使用光谱和显微镜进行表征.
密度函数理论 (DFT) 的计算.

主要成果:

设计的催化剂,Py-m-2N,在没有合催化剂的情况下,实现了48.86 mmol g -1 h -1 的进化率.
原子作为活性位点,促进了电子积累.
DFT的计算证实了从pyrene单元到站点的增强电子传输.

结论:

改性是改善有机半导体光催化剂的有效策略.
开发的以烯为基础的材料显示了无金属光催化生产的高潜力.
这项研究为未来的有机光催化剂开发提供了一个分子设计方法.

关键词:

的生产生产的生产.有机半导体材料是有机的半导体材料.光催化作用的光催化作用烯分子中的烯分子.太阳能是太阳能中的一种.

更多相关视频

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

Published on: April 10, 2019

相关概念视频

Catalysis

Catalysis

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.

Photochemical Electrocyclic Reactions: Stereochemistry

Photochemical Electrocyclic Reactions: Stereochemistry

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

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...