摘要
The composite of MoS 2 and hollow carbon sphere (MoS 2 @HCS) is prepared via a glucose-assisted one pot synthesis. The composite consists of hierarchical spheres with a diameter of 0.5–4 μm and these hollow spheres are decorated with a number of curled and interlaced MoS 2 nanosheets. After the composite is subject to the lithium intercalation, the MoS 2 is converted from 2H to 1T phase. In this current work, the activities of 1T-MoS 2 @HCS toward photocatalytic hydrogen evolution and the reduction of I 3 − in dye-sensitized solar cells (DSCs) are systemically investigated. When evaluated as the photocatalyst for hydrogen evolution, the amount of evolved hydrogen over 1T-MoS 2 @HCS can reach 143 μmol in 2 h, being 3.6 times higher than as-synthesized 2H-MoS 2 @HCS. Additionally, the 1T-MoS 2 @HCS can be employed as the counter electrode (CE) material in DSCs. The DSCs based on 1T-MoS 2 @HCS CE possesses the power conversion efficiency of 8.94%, being higher than that with 2H-MoS 2 @HCS CE (8.16%) and comparable to that with Pt CE (8.87%). Our study demonstrates that 1T-MoS 2 @HCS has a great potential as an inexpensive alternative to Pt catalysts.