The relationship between local structure and visible-light-activated photocatalytic ability of glass–ceramics prepared from Municipal Solid Waste (MSW) was investigated. The samples were characterized by XRD, ⁵⁷Fe Mössbauer spectroscopies, TEM and DRS. From the Mössbauer spectrum, it was found that iron ions are present in Fe^III(tetrahedral) and Fe^II(tetrahedral) coordinations. A high covalent iron magnetic component (Fe^IV) with small isomeric shifts is also confirmed in the Model Slag (MS-x) samples. The energy band gap values of the samples can easily be tuned by simple adjusting the initial iron concentration and heat treatment. The largest degradation of 99.56% was estimated for methylene blue dye under the visible-light irradiation using MS-15. It is concluded that a small change of chemical composition in MSW contributed to a large change of first-order-rate kinetics and local structure. This study provides a novel approach for the removal of contaminants using MSW and sheds new insights into the presence of Fe^IV species enhancing photocatalytic activity.

研究了城市固体废物（MSW）制备的微晶玻璃的局部结构与可见光活化光催化能力之间的关系。通过 XRD、⁵⁷ Fe Mössbauer 光谱、TEM 和 DRS对样品进行表征。从穆斯堡尔谱中，发现铁离子存在于 Fe ^III（四面体）和 Fe ^II（四面体）配位中。高共价铁磁性元件（铁^IV具有小的异构体位移）也证实了在模型矿渣（MS- X) 样品。通过简单地调整初始铁浓度和热处理，可以很容易地调整样品的能带隙值。使用 MS-15 在可见光照射下估计亚甲蓝染料的最大降解为 99.56%。得出的结论是，MSW 中化学成分的微小变化有助于一级速率动力学和局部结构的巨大变化。这项研究提供了一种使用 MSW 去除污染物的新方法，并为增强光催化活性的 Fe ^IV物种的存在提供了新的见解。