摘要
研究了不同制备工艺及掺量的石墨相氮化碳(g-C_(3)N_(4))对混凝土的力学性能及对NO气体光催化降解性能的影响及变化规律。通过TEM、SEM、XRD分别对材料的物相及微观结构进行了表征,利用微机控制全自动压力试验机和氮氧化物分析仪分别研究了掺g-C_(3)N_(4)后混凝土的抗压强度及对NO的降解性能。结果表明,四种不同种类的g-C_(3)N_(4)掺入后混凝土都具有对NO的降解作用,其中,少层g-C_(3)N_(4)的降解率最高,且在紫外线等照射24 h后其仍能保持较高的降解率;g-C_(3)N_(4)掺量不超过0.8%时混凝土的抗压强度不会有太大影响,在此范围内尽可能提高g-C_(3)N_(4)的掺量来提高其对NO的降解作用。
The effects of different preparation technology and amount of graphite phase carbon nitride(g-C_(3)N_(4))on the mechanical properties of the concrete and photocatalytic degradation of NO gas were studied.The phase and microstructure of the materials were characterized by TEM,SEM and XRD.The compressive strength and NO degradation of the concrete with g-C_(3)N_(4) were studied by means of a microcomputer controlled automatic pressure tester and a nitrogen oxide analyzer.The results show that four kinds of g-C_(3)N_(4) added in concrete have obvious degradation effect on NO,among which the degradation rate of a few layers g-C_(3)N_(4) is the highest,and it can still maintain a high degradation rate 24 h after UV irradiation.The compressive strength of concrete will not be greatly affected when the amount of g-C_(3)N_(4) does not exceed 0.8%,and the adding g-C_(3)N_(4) can be improved as much as possible in this range to improve the degradation of NO.
作者
张瑜都
孔文琼
赵建昌
张晴
ZHANG Yu-du;KONG Wen-qiong;ZHAO Jian-chang;ZHANG Qing(Shaanxi Railway Institute,Weinan 714000,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Automobile,Tongji University,Shanghai 200092,China)
出处
《混凝土与水泥制品》
2021年第3期7-10,共4页
China Concrete and Cement Products
基金
陕西铁路工程职业技术学院科研基金项目(KY2017-0883)
陕西省科技攻关项目(2013GY2-03)。
关键词
石墨相氮化碳
光催化混凝土
NO
降解性能
抗压强度
Graphite phase carbon nitride
Photocatalytic concrete
NO
Degradation performance
Compressive strength
