探索光催化和光传感应用中形态相关的 CdS/MoS2 异质结构,ACS Applied Nano Materials

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探索光催化和光传感应用中形态相关的 CdS/MoS2 异质结构
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-12-06 , DOI: 10.1021/acsanm.3c04371
Baisali Kundu ₁ , Afsal S. Shajahan ₂ , Brahmananda Chakraborty _{2,

3} , Ranjan K. Behera ₄ , Manas K. Sarangi ₄ , Debabrata Pradhan ₁ , Prasana K. Sahoo ₁

Affiliation

在全球环境问题和能源需求不断升级的情况下，通过可持续方法协同应对这些挑战至关重要。光催化是一种关键的绿色技术，有望实现能源进化和污染物降解。我们提出了一种通过经济有效的基于解决方案的方法合成 CdS、MoS ₂和 CdS/MoS _{2异质结构的简单策略。}所得材料表现出分级纳米结构——纳米颗粒、纳米棒和纳米薄片——可通过溶剂选择（例如水、乙二醇和乙二胺）以及天然硫源L-半胱氨酸来控制，并展示了它们的光催化性能。利用密度泛函理论模拟，我们证实了实验结果，揭示了结构演化、带隙变化以及增强的光催化和光响应特性。CdS/MoS ₂异质结构表现出显着的电荷转移和光电导性，这源于范德华相互作用和电荷迁移。这些混合纳米结构的电荷转移和晶格失配的协同效应表现出显着缩小的带隙，优于原始对应物，并证实了卓越的光催化和光传感性能。我们的研究推进了形态驱动的光催化，为绿色能源转换提供了新的见解。

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Probing Morphology-Dependent CdS/MoS2 Heterostructures for Photocatalytic and Light-Sensing Applications

Amid the escalating global environmental concerns and energy demands, the synergistic remediation of these challenges through sustainable methodologies is paramount. Photocatalysis, a pivotal green technology, holds promise for energy evolution and pollutant degradation. We present a simple strategy for synthesizing CdS, MoS₂, and CdS/MoS₂ heterostructures via a cost-effective solution-based approach. The resultant materials exhibit hierarchical nanoarchitectures- nanoparticles, nanorods, and nanoflakes- controllable by solvent selection, such as water, ethylene glycol, and ethylenediamine, using l-cysteine, a natural source of sulfur, and demonstrate their photocatalytic performances. Employing density functional theory simulations, we corroborate experimental findings, unveiling structural evolution, band gap variation, and enhanced photocatalytic and photoresponsive properties. The CdS/MoS₂ heterostructure demonstrates remarkable charge transfer and photoconductivity, stemming from van der Waals interactions and charge migration. This synergistic effect of charge transfers and lattice mismatch of these hybrid nanostructures manifests a substantially narrowed band gap, outperforming pristine counterparts, and substantiates exceptional photocatalytic and light-sensing performance. Our study advances morphology-driven photocatalysis, offering novel insights into green energy conversion.

更新日期：2023-12-06

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