Constructing 1D/2D heterojunction photocatalyst from FeSe ₂ nanorods and MoSe ₂ nanoplates with high photocatalytic and photoelectrochemical performance

Abstract

Although the traditional metal oxide catalyst has high activity and strong degradation ability, the forbidden bandgap is generally larger, and the utilization rate of sunlight is much low. Moreover, the high internal resistance inhibits carrier transfer, so the photoelectrochemical performance needs to be improved. Selenides with narrow bandgap and low internal resistance are promising candidates for photocatalysts. A new type of 1D/2D selenide heterojunction was constructed by compositing MoSe 2 and FeSe 2 , two kinds of narrow bandgap metal selenides. In this 1D/2D heterojunction, MoSe 2 presents a three-dimensional network structure, which can effectively collect and transport optical carriers, and it is an ideal heterostructure as a substrate loaded with 1D FeSe 2 nanorods. Moreover, this heterojunction has good light absorption characteristics and can achieve full spectrum absorption of ultraviolet and visible light. This FeSe 2 /MoSe 2 composite has photocatalytic performance more than 3.4 times that of MoSe 2 , and its photoelectrochemical performance is more than 2 times. The experimental results show that FeSe 2 / MoSe 2 is an ideal composite system with great potential in photocatalysis.

Review of Hybrid 1D/2D Photocatalysts for Light-Harvesting Applications

“…The TEM image in Figure 7i shows the interface contact between MoSe 2 and FeSe 2 having a d spacing of 0.646 nm attributed to the (002) plane and FeSe 2 having a d spacing of 0.368 nm corresponding to the (110) lattice plane. 78 Similarly, Wu et al reported the self-assembly preparation of hybrid Pdoped g-C 3 N 4 tubes through the bottom-up approach of pyrolysis shown in Figure 7j under the desired condition. The product was then freeze-dried and calcined for growth of the nanostructure.…”

1D/2D Heterostructured Photocatalysts: From Design and Unique Properties to Their Environmental Applications

“…Zhang and coworkers reported a new type of 1D/2D selenide heterojunction constructed by compositing MoSe 2 nanoplates and FeSe 2 nanorods, two kinds of narrow bandgap metal selenides as shown in Figure 3c. [ 48 ] In the FeSe 2 /MoSe 2 1D/2D heterostructure, FeSe 2 1D nanorods loaded on the 2D surface of MoSe 2 nanoplates to achieve a large surface well contacting for carriers′ transfer channel, and mostly carriers generated in the FeSe 2 will transfer through the channel, which means carriers can transfer between the heterojunction very easily to achieve high separation efficiency and enhanced photocatalytic performance in the degradation of methylene blue (MB) as shown in Figure 3d. Besides, a series of direct Z‐scheme WO 2.72 /ZnIn 2 S 4 hybrid photocatalysts composed of 1D WO 2.72 nanorods and 2D ZnIn 2 S 4 nanosheets also have been designed and constructed for tetracycline hydrochloride (TCH) degradation.…”

“…Reproduced with permission. [ 48 ] Copyright 2019, John Wiley & Sons; e,f) CdS/Ti 3 C 2 T x heterostructure. Reproduced with permission.…”

“…[ 6,41–44 ] The designed synthesis and application of dimensional heterostructures with multifunctional materials use the synergism or the summation effects from different dimensional materials, and those newly developed materials may realize the unique dimensionality‐dependent advantages and mitigate the disadvantages in using for different photocatalytic reactions as shown in Table 1 . [ 17,45–51 ] In this table, we summarized the performances of different 1D/2D heterogeneous photocatalysts used in various photocatalytic reactions, such as hydrogen production, pollutants removal, and carbon dioxide reduction. Besides, it is worthy to mention that the interface between these two segments might introduce the engineering in the electronic states, which will provide some new attributes during photocatalysis that are greatly different from that of the single components.…”

Simple Hydrothermal Synthesis of Molybdenum Disulfide and Its Application for a Large‐Area Photodetector

“…As a typical 2D graphene-layered material, transition metal dihalide (TMD) has great potential in the application of photoelectric conversion due to its quantum confinement effect, inherent atomic structure, and fascinating physical properties. [7][8][9] To date, various TMD-based photodetectors have been reported in previous studies and have shown excellent performance. For example, Zheng et al prepared a large-area, highcrystalline WSe 2 thin film by pulsed laser deposition and applied it to a broadband photodetector of 370-1064 nm.…”