过渡金属二甲基化物的最新进展和发展:合成,特性和应用
Shilpa Thakur1, Pandian Mannu2, Chung-Li Dong2
1School of Applied Engineering, University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun, Uttarakhand, 248007, India.
概括
过渡金属二化物 (TMDCs) 是具有独特特性的有希望的二维材料. 本综述涵盖了它们的合成,特性和在电子和能源领域的各种应用.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 石墨烯的发现激起了人们对二维材料的兴趣,如,,六边形化和过渡金属二化物 (TMDC).
- 由于其特殊的化学和物理特性,TMDCs被广泛研究.
- 少数层或单层TMDC提供优势,如弱层间力,直接带间隙,活性位点和大间距,可用于气体传感,能量转换/储存,催化和光电子.
研究的目的:
- 为了提供一个全面的过渡金属二甲基化物 (TMDCs) 概述.
- 讨论TMDC的固有特性,制造方法和应用.
- 突出目前在TMDCs领域的挑战和未来的研究方向.
主要方法:
- 本综述综合了关于TMDC制造技术的信息.
- 讨论的方法包括水/溶热合成,物理蒸气沉积 (PVD),化学蒸气沉积 (CVD) 和其他化学和物理蒸气方法.
- 该审查还涵盖了TMDC属性的表征及其修改.
主要成果:
- TMDC 具有独特的特性,适合各种先进的应用.
- 目前的制造方法允许合成具有量身定制特征的TMDC.
- 展示了TMDC在传感,能源,催化和光电子领域的多种应用.
结论:
- TMDC是多功能二维材料,在多个科学和技术领域具有重大潜力.
- 合成和稳定性研究的进一步进展对于实现它们的全部潜力至关重要.
- 探索新的应用和理解TMDC行为仍然是未来研究的关键领域.
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相关概念视频
Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
Crystal Field Theory - Octahedral Complexes
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
