摘要
本研究结合阳极氧化和超声辅助沉积的方法合成碳氮共掺杂的二氧化钛纳米管阵列,并采用XRD、FESEM、UV-vis、XPS等技术对材料进行表征.光电化学(PEC)体系中,碳氮共掺杂二氧化钛纳米管阵列作为阳极,甲基橙溶液作为光电催化氧化的对象,对光催化剂的氧化性能进行了考察,与此同时,在阴极实现光解水产氢,最终在PEC体系中实现同时降解甲基橙和产氢.XRD、FESEM、UV-vis、XPS及TEM等表征结果表明,碳氮成功地掺入到了二氧化钛纳米管阵列中,并未破坏其多孔有序的结构,而且比二氧化钛纳米管阵列具有更高的光催化活性.光电催化降解甲基橙的实验当中,在酸性溶液条件下,二氧化钛纳米管阵列的催化氧化效率较高,降解效率达到了100%,其速率常数为2.3×10-3s-1(p H=4),同时也具有较高的产氢速率(0.95 mmol·h-1),因此,该实验体系在光电催化降解污水中的有机污染物同时产氢方面有应用前景.
This study employed anodization and sonication-assistance methods to synthesize carbon and nitrogenco-doped Ti O2 nanotube arrays. FE-SEM,XRD,XPS and UV-vis spectroscopy were conducted to characterize the obtained C,N-TNAs. Photoelectrochemical（ PEC） degradation of hazardous organic compounds was exemplified by methyl orange,an azo dye,in the anodic chamber,while hydrogen generation was conducted in the cathodic chamber,simultaneously. Results showed that the carbon and nitrogen atoms were successfully doped into the TNAs without disturbing the order nanotube arrays structure. C,N-TNAs performed higher photocatalytic degradation efficiency than that of TNAs. The MO degradation efficiency was up to almost100% with the rate constant of 2. 3 × 10- 3s- 1at p H = 4. The hydrogen production rate was up to 0. 95 mmol·h- 1. Thus,this experiment systemhas application potential in concurrent PEC degradation of organic pollutants and hydrogen generation.
出处
《环境科学学报》
CAS
CSCD
北大核心
2015年第9期2790-2797,共8页
Acta Scientiae Circumstantiae
基金
华南理工大学中央高校基本科研业务费专项基金(青年教师资助计划)~~
