Can structure influence hydrovoltaic energy generation? Insights from the metallic 1T′ and semiconducting 2H phases of MoS2†

IF 5.8 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Nanoscale Pub Date : 2024-12-11 DOI:10.1039/D4NR02416H
Kaushik Suvigya, Saini Lalita, Siva Nemala Sankar, Andrea Capasso, Li-Hsien Yeh and Kalon Gopinadhan
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Abstract

Hydrovoltaic power generation from liquid water and ambient moisture has attracted considerable research efforts. However, there is still limited consensus on the optimal material properties required to maximize the power output. Here, we used laminates of two different phases of layered MoS2 – metallic 1T′ and semiconducting 2H – as representative systems to investigate the critical influence of specific characteristics, such as hydrophilicity, interlayer channels, and structure, on the hydrovoltaic performance. The metallic 1T′ phase was synthesized via a chemical exfoliation process and assembled into laminates, which can then be converted to the semiconducting 2H phase by thermal annealing. Under liquid water conditions, the 1T′ laminates (having a channel size of ∼6 Å) achieved a peak power density of 2.0 mW m−2, significantly outperforming the 2H phase (lacking defined channels) that produced a power of 2.4 μW m−2. Our theoretical analysis suggests that energy generation in these hydrophilic materials primarily arises from electro-kinetic and surface diffusion mechanisms. These findings highlight the crucial role of phase-engineered MoS2 and underscore the potential of 2D material laminates in advancing hydrovoltaic energy technologies.

Abstract Image

结构能否影响水伏特发电?从 MoS2 的金属 1T' 相和半导体 2H 相中获得的启示
利用液态水和环境湿度发电已经引起了大量的研究。然而,对于最大化功率输出所需的最佳材料特性,仍然存在有限的共识。在这里,我们使用两种不同相的层状MoS2 -金属1T'和半导体2H -作为代表系统来研究特定特性,如亲水性,层间通道和结构,对光伏性能的关键影响。金属1T′相通过化学剥离工艺合成并组装成层叠板,然后通过热退火将其转化为半导体2H相。在液态水条件下,1T'层压板(通道尺寸为~6 Å)的峰值功率密度为2.0 mW。m-2,显著优于产生2.4 μ w - m-2的2H相(缺乏定义通道)。我们的理论分析表明,这些亲水性材料中的能量产生主要来自电动力学和表面扩散机制。这些发现强调了相工程MoS 2的关键作用,并强调了二维材料层压板在推进光伏能源技术方面的潜力。
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来源期刊
Nanoscale
Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
12.10
自引率
3.00%
发文量
1628
审稿时长
1.6 months
期刊介绍: Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.
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