A review on vertical and lateral heterostructures of semiconducting 2D-MoS with other 2D materials: a feasible perspective for energy conversion

• Published in: Nanoscale 2021-06, Vol.13 (22), p.998-9944
• Main Authors: Swain, Gayatri, Sultana, Sabiha, Parida, Kulamani
• Format: Article
• ISSN: 2040-3364; 2040-3372
• DOI: 10.1039/d1nr00931a

Fossil fuels as a double-edged sword are essential to daily life. However, the depletion of fossil fuel reservoirs has increased the search for alternative renewable energy sources to procure a more sustainable society. Accordingly, energy production through water splitting, CO 2 reduction and N 2 reduction via photocatalytic and electrocatalytic pathways is being contemplated as a greener methodology with zero environmental pollution. Owing to their atomic-level thickness, two-dimensional (2D) semiconductor catalysts have triggered the reawakening of interest in the field of energy and environmental applications. Among them, following the unconventional properties of graphene, 2D MoS 2 has been widely investigated due to its outstanding optical and electronic properties. However, the photo/electrocatalytic performance of 2D-MoS 2 is still unsatisfactory due to its low charge carrier density. Recently, the development of 2D/2D heterojunctions has evoked interdisciplinary research fascination in the scientific community, which can mitigate the shortcomings associated with 2D-MoS 2 . Following the recent research trends, the present review covers the recent findings and key aspects on the synthetic methods, fundamental properties and practical applications of semiconducting 2D-MoS 2 and its heterostructures with other 2D materials such as g-C 3 N 4 , graphene, CdS, TiO 2 , MXene, black phosphorous, and boron nitride. Besides, this review details the viable application of these materials in the area of hydrogen energy production via the H 2 O splitting reaction, N 2 fixation to NH 3 formation and CO 2 reduction to different value-added hydrocarbons and alcohol products through both photocatalysis and electrocatalysis. The crucial role of the interface together with the charge separation principle between two individual 2D structures towards achieving satisfactory activity for various applications is presented. Overall, the current studies provide a snapshot of the recent breakthroughs in the development of various 2D/2D-based catalysts in the field of energy production, delivering opportunities for future research. Emerging 2D-MoS 2 based 2D/2D heterostructures toward high-efficiency energy conversion applications. A powerful combination of 2D-MoS 2 with other 2D materials furnishes an excellent heterointerface for superior photo/electrocatalytic performances.