The invention discloses
porous metal organic
hybrid glass for detecting the
moisture content in industrial oil as well as a preparation method and application of the
porous metal organic
hybrid glass. The structural general formula of the
hybrid glass is RExM (1-x) (NO3) y (C5H2N4) z, RE is at least one light-emitting
rare earth ion of Tb < 3 + >, Eu < 3 + >, Sm < 3 + > and Dy < 3 + >, M is at least one non-light-emitting or weak-light-emitting low-cost cation of Zn < 2 + >, Mg < 2 + >, Ca < 2 + > and Al < 3 + >, and x is the
mole fraction of RE in total cations and meets the condition that xlt is larger than or equal to 0.1; and in the formula, C5H2N4 is a 4, 5-dicyanoimidazole ligand. According to the material, a precursor solution is heated and evaporated, and micron-sized porous structures which are communicated with one another are formed in situ in the curing process. The porous structure greatly increases the specific surface area, so that the material has rapid and sensitive
fluorescence response to
water in oil. When the material is in contact with water-containing industrial oil, an
energy transfer path from a ligand to
rare earth ions in the material is damaged by water molecules, so that the
rare earth characteristic
fluorescence intensity is linearly quenched along with the increase of the
water content. The material has the advantages of simplicity and convenience in preparation, controllable cost, quick response, high sensitivity, good selectivity, easiness in integration and the like, and is suitable for quick and online detection of trace
moisture in industrial oil such as
cutting oil, lubricating oil, hydraulic oil and the like.