Research And Equipment Development Of Water Collection Device Based On MOF Material

The global water scarcity issue is becoming increasingly severe,and obtaining clean drinking water in arid regions has always been a challenge.A new method of obtaining clean water from the air has attracted people’s interest in addressing the drinking water needs of people in arid regions.Metal-organic framework materials（MOFs）have great potential for atmospheric water harvesting in arid regions.However,the high cost of MOFs material synthesis has hindered their mass production.Additionally,in practical water collection work,the stacking of the material itself can significantly reduce its water collection performance.In this study,MOF-303 was synthesized using a reflux method at atmospheric pressure instead of the traditional solvothermal method.The product’s performance was verified by characterization,which was comparable to the product synthesized by the solvothermal method.By controlling the reaction time and temperature,the optimal reaction conditions were determined to be 120℃ for 9 hours,and the yield reached as high as93.56%.This approach increased the yield and reduced the difficulty of the reaction.To address the issue of performance decline during material stacking in MOF-303,single-layer graphene was added to MOF-303 to synthesize a MOF-303 graphene composite aerogel through a co-reaction.By further optimizing the ratio,the optimal quality ratio of graphene:MOF-303 was determined to be 1:20.The adsorption speed of the composite material was increased by 1/3 compared to that of pure MOF-303.A successful atmospheric water harvesting device was developed,powered by solar energy and capable of off-grid automatic operation.The device was computer-controlled and data was collected with easy operation.Finally,liquid water was successfully collected,achieving a preliminary result of 0.84L·kg _MOF-1 day-1（24℃,45%RH）and meeting the standard for drinking water quality.