以氟化工副产物二氧化硅和氢氧化钙为原料,采用静态水热法制备出了由纳米线构成的比表面积高达143.8 m2/g的网状硅酸钙。采用XRD、SEM、BET等手段对产物的物相、形貌特征、比表面积进行了表征;研究了合成体系温度、钙硅摩尔比等因素的影响。通过静态吸附试验对该材料的磷吸附性能进行测试。实验结果表明,在钙硅摩尔比为0.7,120~160℃温度范围内,水热8 h条件下可以得到比表面积较大的纳米线网状硅酸钙;该条件下制备出的样品对含磷模拟污水具有较高效的吸附能力,磷去除率达99.5%。 Fluorochemical by-products of silica and calcium hydroxide as raw materials, the hydrothermal method was used to prepare a nanowire surface area up to 143.8 m2 / g of calcium silicate mesh. The phase, morphology and specific surface area of ​​the product were characterized by means of XRD, SEM and BET. The effects of temperature, molar ratio of calcium to silicon and other factors were studied. The phosphorus adsorption performance of the material was tested by static adsorption test. The experimental results show that the nanosilica calcium silicate with larger specific surface area can be obtained under hydrothermal condition for 8 h under the condition of the molar ratio of calcium to silicon being 0.7-120-160 ℃. Phosphorus simulated wastewater has a more efficient adsorption capacity, phosphorus removal rate of 99.5%.