| 摘要: |
| 探索了2种制备氮化碳光催化混凝土的方法：第1种是在浇筑成形的混凝土表面附着二氰二胺粉末后高温煅烧;第2种是直接在浇筑成形的混凝土表面附着氮化碳悬浊液并烘干.通过NO气体的降解对比试验发现：第1种方法制备得到的氮化碳光催化混凝土光催化效率较低,制备工艺复杂,不适宜大规模工程应用;第2种方法制备的光催化混凝土,其光催化效率相比第1种有较大提高,NO气体降解率可达6099%,混凝土抗压强度不会降低,且具有良好的耐久性. |
| 关键词: 混凝土 光催化 二氰二胺 降解 |
| DOI：103969/j.issn.1007 9629201904009 |
| 分类号: |
| 基金项目:贵州省交通厅科技项目（2016 123 040）；贵州省科学技术计划（[2017]2035）；重庆市研究生教育创新基金（CYS18215） |
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| Preparation and Characterization of Photocatalytic Concrete Loaded with Carbon Nitride |
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LU Zhenzhen, LIU Dong, ZHANG Qi, LI Siqi
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School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
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| Abstract: |
| Two methods for the preparation of carbon nitride photocatalytic concrete were introduced. One method was that dicyandiamide powder was put on the surface of prepared concrete, and then high temperature calcination was conducted to produce carbon nitride photocatalytic concrete. The other method was directly applying carbon nitride suspension on the surface of primary concrete and wait for concrete consolidation. Through the test of NO degradation under the irradiation of visible light, the photocatalytic removal efficiency by the photocatalytic concrete prepared by the first method is relatively low compared to the second method, and this method is not suitable for large scale engineering due to complicated preparation process. The photocatalytic concrete prepared by the second method is effective for NO degradation, 6099% NO could be eliminated by the prepared photocatalytic concrete. Besides, the compressive strength and durability of photocatalytic concretes were tested. The results demonstrate that no decrease of the compressive strength and smaller decrease of NO degradation efficiency of photocatalytic concretes prepared by the second method indicating acceptable mechanical property and excellent durability. |
| Key words: concrete photocatalysis dicyandiamide degradation |
