Graphical This paper reports the one-step synthesis of 1T-MoS₂ nanosheets using a simple hydrothermal method at 140 °C. The highest adsorption abilities for methylene blue and rhodamine b are 605 and 795 mg g⁻¹, respectively. This paper reports on the one-step synthesis of molybdenum disulfide (MoS 2 ) nanosheets with excellent adsorption properties for cationic dyes using a simple hydrothermal method. Compared with 2H-MoS 2 prepared at 220 °C, 1T-MoS 2 prepared at 140 °C showed better adsorption of cationic dyes, with highest adsorption abilities of 605 and 795 mg g⁻¹ for methylene blue and rhodamine b, respectively. The adsorption process follows a pseudo second-order kinetic model, which indicates that the process is mainly controlled by chemisorption. At the same time, the Langmuir isotherm model is more suitable for describing the adsorption process, suggesting a monolayer adsorption on a homogeneous surface of 1T-MoS 2 . Adsorption equilibrium times were observed at 1–6 h in the initial dye concentration range of 100–400 mg/L. The zeta-potential and XPS results suggest that 1T-MoS 2 possesses a negatively charged surface and abundant oxygen-containing functional groups, making it more effective in adsorbing cationic dyes. The excellent adsorption performance of 1T-MoS₂ provides fresh perspectives for the development of MoS₂-based adsorbents.
Wei Guo,Xiaofeng Li,Taihua Zhang,Xueting Chang,Yan An
Aiming at wearable low-grade heat harvesting, we developed a facile drop‑casting strategy to fabricate freestanding polyaniline/1 T-phase molybdenum disulfide (PANI/1 T-MoS 2 ) composite thick films (~37 μm), using m -cresol as the processing solvent and camphorsulfonic acid (CSA) as the dopant. The composite films successfully decouple the conventional trade-off between electrical conductivity ( σ ) and Seebeck coefficient ( S ) through interfacial coupling and carrier regulation enabled by 1 T-MoS 2 . The optimized PANI‑MoS 2 ‑25 sample delivers a maximum power factor ( PF ) of 26.18 μW·m −1 ·K −2 at 378 K, representing an ~19‑fold enhancement over pristine PANI, together with a low thermal conductivity of 0.22 W·m −1 ·K −1 at 298 K, yielding a ZT ≈ 0.05. The film exhibits excellent mechanical reliability, retaining 94.1% of its initial σ and 96.3% of its initial S after 1000 bending cycles at a radius of 8 mm. A ten‑leg series‑connected flexible thermoelectric generator (F‑TEG) assembled from this film produces an open‑circuit voltage of 4.781 mV at Δ T = 10 K (simulating body‑heat harvesting) and 20.716 mV at Δ T = 43 K, with a maximum output power of 0.729 μW and a peak power density of 9.1 μW·cm −2 . This work provides a feasible material platform and processing route for developing wearable thermoelectric devices that combine high output performance, remarkable flexibility, and simple fabrication.
Transition metal sulfides (TMSs) exhibit high theoretical capacity as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, their practical application is severely hindered by poor cycling stability. In this study, Co 3 S₄/1T-MoS₂ heterostructure was confined on nitrogen-doped carbon nanosheets composite (Co 3 S₄/1T-MoS₂@NC) by high-temperature pyrolysis and hydrothermal sulfidation, using ZIF-67 as the precursor, modulated by a small-molecule carbon source. The heterostructure between Co 3 S₄ and 1T-MoS₂ synergistically enhances the electrical conductivity and rapid diffusion kinetics. The aggregation of MoS 2 nanosheets at the interface effectively enhances the electrochemical performance of the material, while the nitrogen-doped carbon generated at the interface provides additional active sites. This interface engineering and the formation of heterostructures endow the material with improved ion storage capabilities. The composite remains high specific capacities of 1192.2 mAh g⁻¹ for LIBs and 615.3 mAh g -1 for SIBs after 100 cycles at 0.1 A g -1 . The combination of enhanced charge transport and structural stability highlights the potential of the heterostructure strategy for next-generation high-performance alkali metal-ion batteries.
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