The MoS2 nanosheets suspensions were prepared based on liquid exfoliation method. The suspensions are characterized by absorbance and photoluminescence (PL) spectroscopy. The results show the PL signal from suspensions is enhanced evidently. Meanwhile

the optimized processing conditions

such as increasing of ultrasonic time

decreasing of centrifugal rotational speed

using large-size bulk MoS2 and adding ball-milling process

could enhance the absorbance of the suspensions. Using micro-area PL testing can obtain the PL signal from single MoS2 nanosheet

and it's PL main peak is located at 652 nm

which corresponds to a band gap of 1. 9 eV. When the single MoS2 nanosheet is annealed

its PL signal is enhanced. The morphology of MoS2 nansosheets is characterized by SEM and AFM

the results show the most MoS2 nansosheets have a lateral size of several hundred nanometers and a thickness of several nanometers. Besides

MoS2 nansosheets reinforced epoxy composites were prepared by mixing MoS2 nansosheets suspension and E51 epoxy. The composites are characterized by PL and tensile testing. And the results show the PL signal from composites is enhanced as well. While the composites are annealed

the PL signal shows obvious shift which could be ascribed to residual thermal stress in the composites. Meanwhile

the toughness of the composites is also improved.