MOF-templated synthesis of photoluminescent MoS2 QDs.

Fabricating MoS2 QDs using porous metal-organic frameworks (MOFs) as templates remains a great challenge, because the MOF structure is prone to collapse during solvothermal reactions, resulting in a loss of the function of the template. In the present work, the production of homogeneous photoluminescent MoS2 QDs was achieved by using the structurally stable MOF MIL-101 as limited nanoreactors. The process developed opens up a new route for fabricating other photoluminescent QDs and their derived nanomaterials.

TiO2 NPs/h-BN: Preparation and catalytic activities of a novel AP catalyst.

The thermal decomposition performance of an oxidizer directly determines the thrust and specific impulse properties of the solid propellant. Hexagonal boron nitride (h-BN) has the characteristics of high catalytic activity and good stability, which can improve the heat release and decomposition temperature of the oxidant, and then improve the energy performance of the propellant. In this study, a novel hybrid material TiO2 NPs/h-BN was successfully prepared by in situ growth, and it was found that when 5 wt.% TiO2 NPs/h-BN was added, the initial decomposition temperature of ammonium perchlorate (AP) decreased by 67.6°C. Due to the addition of TiO2, the gap between the h-BN layers as well as the specific surface increased, which optimized its thermocatalytic performance, and it also proposed a catalytic mechanism for the thermal decomposition process of AP.