摘要
以尿素、醋酸锌、柠檬酸为主要原料,采用浸渍-热聚合法分别制备了ZnO/g-C3N4和CDs/ZnO/g-C3N4复合材料,考察了2种催化剂在可见光下对罗丹明B的光降解效率。利用XRD、TEM、XPS、UV-Vis DRS、FTIR对催化剂进行了表征和评价。结果表明:石墨相氮化碳(g-C3N4)呈片状,ZnO呈棒状,碳点(CDs)平均直径约为10 nm,呈单分散排布,分散性较好;且CDs/ZnO/g-C3N4仍保持石墨相g-C3N4的晶型结构,三元组分相互协同作用使CDs/ZnO/g-C3N4在可见光下,光照时间为210 min,对质量浓度为8 mg/L的RhB溶液表现出优异的光催化性能,其降解罗丹明B的效果优于单体g-C3N4、ZnO及ZnO/g-C3N4,降解率可达到70%左右。
ZnO/g-C3N4 and CDs/ZnO/g-C3N4 composites were prepared by impregnation-thermal polymerization with urea,zinc acetate and citric acid as main raw materials.The photocatalytic degradation of Rhodamine B under visible light was investigated using the composites as photocatalysts.The catalysts were characterized and evaluated by means of XRD,TEM,XPS,UV-Vis DRS and FTIR.The results showed that graphite phase carbon nitride(g-C3N4)was flaky,ZnO was rod-shaped,and carbon dots(CDs)had an average diameter of about 10 nm,which was monodisperse and exhibited good dispersibility.Furthermore,CDs/ZnO/g-C3N4 still maintained the crystal structure of g-C3N4 in the graphite phase.CDs/Zn O/g-C3N4 displayed excellent photocatalytic performance for Rh B solution with a mass concentration of 8 mg/L under visible light illumination for 210 min due to the synergistic effect of ternary components.Moreover,CDs/ZnO/g-C3N4 could degrade Rh B better than monomer g-C3N4,ZnO and ZnO/g-C3N4,with a degradation rate of about 70%.
作者
张洁
田景芝
郝欣
荆涛
郑永杰
曹向宇
ZHANG Jie;TIAN Jing-zhi;HAO Xin;JING Tao;ZHENG Yong-jie;CAO Xiang-yu(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,Heilongjiang,China;Light Industry Textile Institute,Qiqihar University,Qiqihar 161006,Heilongjiang,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第7期1439-1445,共7页
Fine Chemicals
基金
黑龙江省教育厅(135309212)
2018年黑龙江省优势特色学科项目(YSTSXK201858)
