废弃玻璃水热合成介孔材料及其性能表征

Hydrothermal Synthesis of Mesoporous Material from Waste Glass and Analysis on

尝试运用水热技术,并通过添加Ca(OH)_2将废弃玻璃合成为介孔吸附材料。采用XRD、SEM、BET、XPS表征其物相组成、结晶形貌、比表面积和元素结合能。结果表明,合成的介孔吸附材料主晶相为雪硅钙石,SEM下可见大量针状雪硅钙石结晶,比表面积为12.707 m2/g。选用Ni^(2+)为目标吸附离子,测得Ni^(2+)的最高吸附量达278.53 mg/g。热力学和动力学的模拟计算表明,材料对Ni^(2+)的吸附为单分子化学吸附,其主要吸附机理为Ni^(2+)取代材料中的Ca^(2+)与Na2+并与表面的O成键。

Waste glass has been synthetized to a mesoporous material by adding Ca（OH）_2 in a hydrothermal condition. The phase composition, crystal morphology, specific surface area and element binding energy were characterized by XRD, SEM, BET and XPS respectively. The results indicated that needle-like tobermorite founded under SEM images was the main crystalline phase massive, and the surface area of the mesoporous material was 12.707m/g. The maximum adsorption amount of the material for Ni^（2＋） was measured to be 278.53mg/g. Thermodynamic and kinetics simulation showed that the adsorption mode to Ni^（2＋） of the mesoporous material was monomolecular and chemical adsorption. Ni^（2＋） substituting Ca^（2＋） and Na~＋ ions and binding with atom O on the surface was certified as the main adsorption mechanism.