MoS2/MoO3 heterostructure ceramic membrane for nanofiltration

Two-dimensional molybdenum disulfide (MoS2) has been recognized an excellent membrane material owing to its exceptional chemical stability, structural integrity, and high mechanical strength. However, the hydrophilic modification of the MoS2 membrane remains a significant challenge. Herein, we present an in-situ oxidation strategy to construct MoS2/MoO3 heterostructure nanosheets with an outer layer of MoO3 and an internal layer of MoS2 through a thermal annealing process, resulting in the ideal MoS2/MoO3 heterostructure ceramic membrane. This approach enhanced the membrane surface hydrophilicity without blocking channels of MoS2 for mass transfer. The resultant MoS2/MoO3 heterostructure membrane exhibited excellent water permeance of 32.8 L m2 h-1 & sdot;bar-1 and Xylenol Orange (XO) rejection up to 97.4 %, and demonstrated outstanding pressure resistance and long-term operational stability.