低成本颗粒物传感器在矿井下空气质量监测的应用

采矿过程各个环节产生微颗粒空气污染，包括煤尘和柴油机尾气颗粒污染。长期吸入过量这些污染物会导致呼吸系统疾病，例如尘肺病及肺癌。现有矿井微颗粒污染检测系统时空分辨率较低，致使矿工暴露在高浓度污染环境中，工作风险增加。低成本颗粒物传感器为广泛实时监测微颗粒污染浓度提供了一种潜在的解决方案，然而其在矿井的应用还未实现。本论文通过分析其光散射的工作原理，总结了影响其精度的误差源，提出了系统的校对方法框架，确定了井下应用可行性的可靠性评价方案。     

A hint from phosphine complex: The π back-bonding in cobalt-phosphorene composite enables enhanced electrocatalytic performance

Regulating the electronic structure of the metal electrocatalyst is fundamental for its performance optimizing. The electronic states of the active metal centers are highly dependent on their coordination environment, especially when bonding is formed. The π back-bonding can induce great electron density redistribution around metals, yet it is barely applied in electrocatalyst design. Herein we electrodeposited metallic cobalt on black phosphorus(BP)nanosheets, forming BP-Co with a unique π back...     

The effect of surface-free energy and microstructure on the condensation mechanism of water vapor

Obtaining high-water-yield drinking water in arid areas without consuming energy is still a global challenge.Since water vapor is ubiquitous, atmospheric water harvesting technologies are undoubtedly one of the most promising candidates. A typical water condensation process is analyzed in this paper(nucleation, self-growth,coalescence and sliding). The mechanisms of interactions between adsorbate and water vapor are discussed.The effect of surface-free energy and microstructure on water vapor co...