Abstract: The present disclosure discloses a CO2 quantitative fluorescent sensing material, a preparation method and an application thereof. The preparation method for the CO2 quantitative fluorescent sensing material includes dissolving 9,10-diacrylic anthracene in a solvent to prepare 5-10 mg/mL of a first solution; dissolving MnCl2 or Mn(ClO4)2 in water to prepare 50-100 mg/mL of a second solution; mixing the first solution and the second solution; adding a diluted acid into the mixed solution; sealing and heating the mixed solution. This preparation method is simple. During application, an ionic liquid produced by a reaction of CO2 gas and an amine compound improves an aggregation-induced emission of the CO2 quantitative fluorescent sensing material and a fluorescence thereof is significantly improved. So that a fluorescent CO2 quantification is performed rapidly and accurately.

Abstract: The present disclosure discloses a CO2 quantitative fluorescent sensing material, a preparation method and an application thereof. The preparation method for the CO2 quantitative fluorescent sensing material includes dissolving 9,10-diacrylic anthracene in a solvent to prepare 5-10 mg/mL of a first solution; dissolving MnCl2 or Mn(ClO4)2 in water to prepare 50-100 mg/mL of a second solution; mixing the first solution and the second solution; adding a diluted acid into the mixed solution; sealing and heating the mixed solution. This preparation method is simple. During application, an ionic liquid produced by a reaction of CO2 gas and an amine compound improves an aggregation-induced emission of the CO2 quantitative fluorescent sensing material and a fluorescence thereof is significantly improved. So that a fluorescent CO2 quantification is performed rapidly and accurately.

Abstract: A low-calcium silicate cement consists of calcium oxide, silica, alumina, and iron oxide. A preparation method of the low-calcium silicate cement consists of: subjecting raw materials to crushing, joint grinding and uniform mixing to obtain a low-calcium silicate cement raw meal; calcining the above low-calcium silicate cement raw meal at 1050-1300° C. for 30-90 min, and cooling to obtain low-calcium silicate cement clinker; and levigating the above low-calcium silicate cement clinker till a specific surface area is 400-500 m2/Kg, thereby obtaining a low-calcium silicate cement.

Abstract: A low-calcium silicate cement, comprising: based on the total mass of oxides as 1, 50-60% of calcium oxide, 30-45% of silica, 2-6% of alumina, and 1-4% of iron oxide. A preparation method of the low-calcium silicate cement comprises: subjecting raw materials to crushing, joint grinding and uniform mixing to obtain a low-calcium silicate cement raw meal; calcining the above low-calcium silicate cement raw meal at 1050-1300° C. for 30-90 min, and cooling to obtain low-calcium silicate cement clinker; and levigating the above low-calcium silicate cement clinker till a specific surface area is 400-500 m2/Kg, thereby obtaining a low-calcium silicate cement.