PDF(Pubmed)
Abstract：
Recycled soda-lime glass powder is a sustainable material that is also often considered a filler in cement-based composites. The changes in the surface properties of the glass particles due to the treatments were analyzed by X-ray photoelectron spectroscopy (XPS) and optical spectroscopy. We have found that there is a relatively high level of carbon contamination on the surface of the glass particles (around 30 at.%), so plasma technology and thermal annealing were tested for surface cleaning. Room temperature plasma treatment was not sufficient to remove the carbon contamination from the surface of the recycled glass particles. Instead, the room temperature plasma treatment of recycled soda-lime glass particles leads to a significant enhancement in their room temperature photoluminescence (PL) by increasing the intensity and accelerating the decay of the photoluminescence. The enhanced blue PL after room-temperature plasma treatment was attributed to the presence of carbon contamination on the glass surface and associated charge surface and interfacial defects and interfacial states. Therefore, we propose blue photoluminescence under UV LED as a fast and inexpensive method to indicate carbon contamination on the surface of glass particles.
摘要：
回收的钠钙玻璃粉是一种可持续的材料，通常也被认为是水泥基复合材料中的填料。通过X射线光电子能谱（XPS）和光谱学分析了由于处理而引起的玻璃颗粒表面性质的变化。我们已经发现，在玻璃颗粒的表面上存在相对较高的碳污染水平（约30at。%),因此，对等离子体技术和热退火进行了表面清洁测试。室温等离子体处理不足以从回收的玻璃颗粒的表面去除碳污染物。相反，回收的钠钙玻璃颗粒的室温等离子体处理通过增加强度和加速光致发光的衰减而导致其室温光致发光（PL）的显着增强。室温等离子体处理后增强的蓝色PL归因于玻璃表面上存在碳污染以及相关的电荷表面和界面缺陷和界面状态。因此,我们提出了在UVLED下的蓝色光致发光作为一种快速且廉价的方法来指示玻璃颗粒表面上的碳污染。
