材料科学
光催化
复合材料
水泥
罗丹明B
降级(电信)
扫描电子显微镜
化学工程
化学
有机化学
计算机科学
电信
工程类
催化作用
作者
V. P. Singh,K. Venkata Sandeep,H.S. Kushwaha,Satvasheel Powar,Rahul Vaish
标识
DOI:10.1016/j.conbuildmat.2017.10.035
摘要
Abstract In this work, ZnO nanoneedles were synthesized employing a co-precipitation method. Further, white cement composites were prepared with ZnO filler of 5%, 10% and 15% by weight ratio. With the increasing concentration of ZnO in cement matrix the synergetic effect between ZnO and white cement matrix was observed through FE-SEM and UV–visible. We studied the photocatalytic degradation of pollutant (Rhodamine 6G) using ZnO nano-needles embedded in white cement matrix under ultraviolet irradiation (UV) along with enhanced hydrophobic nature and the antimicrobial property of the cement. The pseudo-first order kinetics was found in a photocatalytic process, and degradation rate constant was enhanced up to 0.147 min −1 for ZnO modified cement which was significantly higher than the pure cement (0.037 min −1 ). Antimicrobial studies were performed using bacterial strains Escherichia.coli (JM109, Promega Gram negative), Bacillus subtilis (MTCC121, Gram-positive) and fungal strain Aspergillus niger (MTCC281) for all the composites. A significant improvement in bacterial and fungal degradation was observed in ZnO modified cement than control and pure cement in a dose-dependent manner.
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