一种具有光催化活性的水泥的新制备方法
摘要
添加钛白粉生产的半成品获得的。半成品在 300和 600℃下煅烧 1、3和 5小时,然后将这种材料以 1和 3wt.%的量加入
到水泥基体中。通过测量抗折和抗压强度以及初凝和终凝时间,作者对新材料进行表征。在氮氧化物的光氧化过程
中测试了光催化活性。具有光催化活性的水泥也通过测量硫含量进行了表征。本文还进行了与原始水泥和在 600℃下
煅烧的TiO2光催化剂相比,TiO2负载水泥的反射率的测量。应该强调的是,尽管在某些情况下,光催化剂的加入降
低了改性水泥的抗折和抗压强度,但这些数值仍在PN-EN197-1:2012标准范围内。研究还发现,初凝和终凝时间与
锐钛矿的晶体大小有关,较大晶体的存在大大延迟了终凝时间。这可能是由于锐钛矿晶体表面对水的吸附造成的。
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