Coupling ZnIn₂S₄ Nanosheets with MoS₂ Hollow Nanospheres as Visible-Light-Active Bifunctional Photocatalysts for Enhancing H₂ Evolution and RhB Degradation

Abstract

In this study, Mo-glycerate was used as a precursor to create MoS2 hollow nanospheres (HNS), which were then used for the first time to modify ZnIn2S4 nanosheets to create MoS2 HNS/ZnIn2S4 photocatalysts. The findings demonstrate that MoS2 HNS/ZnIn2S4 heterojunctions exhibited remarkably boosted photocatalytic properties and excellent reusability for both RhB degradation and H2 evolution without the use of Pt as a co-catalyst. Among the heterojunctions, the RhB degradation and H2 evolution efficiencies of the optimized MoS2 HNS/ZnIn2S4-3 wt % composite were almost 5 and 34 times higher than those of ZnIn2S4, respectively. The excellent performance of MoS2 HNS/ZnIn2S4-3 wt % might be attributed to the expansion of the visible-light response range and the accelerated separation efficiency of photo-induced carriers, according to the findings of the optical property tests. Based on the established band gap position and characterization results, a potential mechanism for appealing photocatalytic activity over MoS2 HNS/ZnIn2S4 heterojunctions was also postulated.

3D MoS2/MgIn2S4 Nanoflower Heterojunctions for Photoreduction of Cr(VI): Mechanism, Influence, and Toxicity Evaluation

“…For In 3d (Figure d), the two peaks at 445.05 and 453.57 eV were attributed to In 3d 5/2 and In 3d 3/2 of In 3+ , respectively. The two S 2p peaks of MS belonged to S 2p 3/2 and S 2p 1/2 , respectively (Figure e), indicating that S in MS was present in the form of S. − MIS and the 3% MS/MIS generally showed similar spectra, except for the peak of Mo. For Mo 3d (Figure f), the XPS peaks of Mo in MS can be divided into three core-level XPS peaks.…”

“…51 The construction of a 3D structure with rich edges is of great significance to the synthesis of highly active photocatalysts in heterogeneous power systems. Chen et al 52 employed hollow MoS 2 to modify ZnIn 2 S 4 in the preparation of MoS 2 NHS/ZnIn 2 S 4 composites. Interaction between MoS 2 and ZnIn 2 S 4 expanded the absorption range of visible light, promoted the separation and transfer of photoinduced carriers, and significantly improved photocatalytic efficiency.…”

Facile Construction of 2D/2D ZnIn2S4-Based Bifunctional Photocatalysts for H2 Production and Simultaneous Degradation of Rhodamine B and Tetracycline

“…ZnIn 2 S 4 was prepared via an oil-bath process according to the former literature [12]. 272 mg of ZnCl 2 , 442 mg of InCl 3 , and 300 mg of TAA were dissolved into 50 mL of deionized water (pH = 2.5), and heated at 80 • C for 2 h. After cooling, ZnIn 2 S 4 could be obtained by separating, washing, and drying under a vacuum at 60 • C overnight.…”

“…ZnIn 2 S 4 , as an outstanding representative of ternary metal chalcogenides, possesses two-dimensional (2D) nanosheet morphologies, a narrow bandgap of ca. 2.4 eV, and good stability, and thus is recognized to be a suitable candidate for visible-light photocatalytic hydrogen production and pollutant degradation [12,13]. Nonetheless, pristine ZnIn 2 S 4 tends to agglomerate and displays low separation efficiency of the photogenerated electronhole pairs, which greatly restricts its photocatalytic property with hindering its application in the photocatalytic realm [14].…”

In Situ Fabrication of a 2D/2D MXene/CN Heterojunction for Photothermally Assisted Photocatalytic Sterilization under Visible Light Irradiation

“…Pathogenic bacteria caused by water pollution pose a serious threat to human health. More importantly, with the accelerated industrialization of society, waterborne diseases and environmental pollution will continue to spread, which is undoubtedly not conducive to the long-term sustainability of human society. − The light-driven sterilization technology stands out among many sterilization technologies, due to its environmental friendliness, universality, and durability, and has been widely documented. − However, the current light-driven sterilization technology suffers from unsatisfying sterilization performance, which limits its practical industrial application. − Therefore, developing a high-efficiency light-driven sterilization system is urgently needed.…”