氧化石墨烯/钼尾矿光催化自清洁水泥制备及其性能

Preparation and Properties of the Photocatalysis Self-cleaning Graphene Oxide/Molybdenum Tailings Cement

将光催化剂固载于具有凝固特性的水泥材料表面,隧道墙面、人行道路等,可以直接利用太阳能,可以有效去除大气环境中的有机污染物。本文首先采用传统Hummers法制备氧化石墨烯,通过NaOH水热处理得到表面亲水改性氧化石墨烯,将GO高温煅烧制得三维网状氧化石墨烯。将不同结构的氧化石墨烯纳米片层结构引入钼尾矿水泥基体材料中制备光催化自清洁水泥材料。并以罗丹明B为目标污染物研究氧化石墨烯钼尾矿复合水泥材料的光催化性能。研究结果表明,加入氧化石墨烯的水泥基材料表现出优异的光催化性能。300W汞灯光照1h后,GO、GO_(NaOH)、3D-GO复合型水泥材料对100mL 2.0mg·L^(-1)罗丹明B光降解率分别达到了60.02%、70.11%、80.05%。

By immobilizing the photocatalyst in the solidification cement material surface,tunnel wall,and the pedestrian path,can directly use the solar energy and effectively remove the organic pollutants in the atmospheric environment. In this paper,we used the traditional Hummers method to prepare the graphene oxide,and then prepared the surface hydrophilic modified GONa OHby heat-treatment with Na OH,and calcined at high temperature to prepare three-dimensional network of graphene oxide. The photocatalytic self-cleaning cement material was prepared by introducing the different structures of graphene oxide into molybdenum tailings cement.The photocatalytic properties of the composite cement materials with rhodamine B as the target pollutant were studied. The results showed that the cement-based materials with the addition of graphene oxide exhibited excellent photocatalytic performance. After 1 h illumination of 300 W mercury lamp,the photodegradation efficiency of GO,GONaOH and 3D-GO molybdenum tailings cement were 60. 02 %,70. 11 % and 80. 05 %,respectively for 100 mL 2. 0 mg·L^-1 Rhodamine B.