摘要
为改善氧化铜(CuO)的光催化性能,将CuO和多壁碳纳米管(MWCNTs)结合制备了CuO/MWCNTs复合材料。利用扫描电镜(SEM)、傅里叶红外光谱(FTIR)、X射线衍射(XRD)和紫外-可见漫反射(UV-VisDRS)分析对Nano-CuO和CuO/MWCNTs进行形貌、成分、物相结构以及光学性质等一系列的表征与性能分析,结果表明CuO/MWCNTs同时具备CuO和碳纳米管的典型结构,且光吸收性能优于Nano-CuO。在紫外光下进行的两种光催化剂对双酚A(BPA)的光催化降解试验结果显示:两种催化剂作用下BPA光降解平衡的时间一致,均为24 h,但CuO/MWCNTs作为光催化剂时的BPA降解率和反应速率明显高于Nano-CuO,其中降解率高出幅度可达14%~35%;供试范围内,两种材料对BPA的光催化降解率均随催化剂投加量的增加而升高,随pH和离子强度的增加而减小,随BPA浓度的增加呈先增加后减小的趋势,且在相同条件下CuO/MWCNTs受到的影响更大,但其光催化降解率仍远高于Nano-CuO的光催化降解率。研究表明,CuO/MWCNTs复合材料可以显著提高光催化效率及对紫外光的利用率,有效推进了CuO的光催化应用与发展。
To improve the photocatalytic performance of CuO,CuO/multi-wall carbon nanotubes(MWCNTs)composites were prepared by combining CuO with MWCNTs.Both Nano-CuO and CuO/MWCNTs were characterized using scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),and UV-visible diffuse reflectance spectroscopy(UV-Vis DRS)to analyze their morphologies,compositions,phase structures,and optical properties.The results showed that the CuO/MWCNTs had the typical structure of both CuO and MWCNTs,and the light absorption performance of CuO/MWCNTs was better than that of Nano-CuO.Under ultraviolet light,the photocatalytic degradation of bisphenol A(BPA)was performed using two types of photocatalysts.The results showed that under the action of the two photocatalysts the degradation time of BPA reached equilibrium at 24 h;however,under the action of CuO/MWCNTs,the degradation and reaction rates of BPA were significantly higher than those under the action of Nano-CuO,and the degradation rate increased by 14%~35%.Within the test range,the photocatalytic degradation rate of BPA increased with an increase in catalyst dosage,decreased with an increase in pH and ionic strength,and increased first and then decreased with an increase in BPA concentration.CuO/MWCNTs were significantly affected under the same conditions,but the photocatalytic degradation rate of CuO/MWCNTs remained much higher than that of Nano-CuO.CuO/MWCNT composites can significantly improve the photocatalytic efficiency and availability of ultraviolet light,and effectively promote the photocatalytic application and development of CuO.
作者
车乃菊
李银辉
杨帆
刘国平
张增利
李成亮
CHE Naiju;LI Yinhui;YANG Fan;LIU Guoping;ZHANG Zengli;LI Chengliang(National Engineering Research Center for Efficient Utilization of Soil and Fertilize Resources,College of Resources and Environment,Shandong Agricultural University,Tai'an 271018,China;Agricultural and Rural Bureau of Kenli District,Dongying 257500,China;Agricultural and Rural Bureau of Dongying District,Dongying 257000,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2022年第8期1800-1807,共8页
Journal of Agro-Environment Science
基金
国家自然科学基金项目(21377074)。
