【摘要】 采用水热法将GO和TNTs复合,制备了一种新型还原氧化石墨烯/二氧化钛纳米管复合材料(r GO/TNTs)。采用BET、XRD、FT-IR对制备的材料进行了表征,并研究了r GO/TNTs协同降解水中Cr(Ⅵ)和苯酚的性能。结果表明,在Cr(Ⅵ)和苯酚共存二元体系中,r GO/TNTs对Cr(Ⅵ)和苯酚的光催化降解反应动力学常数约为其各自单体系的6.3倍和1.2倍;低pH可促进Cr(Ⅵ)和苯酚的去除,而共存无机阴离子对其具有抑制作用。·OH和空穴主导苯酚降解,光生电子直接还原Cr(Ⅵ)。更多还原

【Abstract】 In this study,a novel reduced graphene oxide/titanium dioxide nanotube composite material(rGO/TNTs)was successfully synthesized by the combination of GO and TNTs through hydrothermal reaction. Then the prepared samples of rGO/TNTs were characterized by BET,XRD,and FT-IR,respectively. Finally,the prepared nanotubes were applied to degrade the Cr(Ⅵ) and phenol from water synergistically. The enhanced photocatalytic removals of coexistent Cr(Ⅵ) and phenol by rGO/TNTs were observed in binary systems,and their kinetic constants were about6.3 and 1.2 times those in the respective single systems. The low pH were found to improve the removals of Cr (Ⅵ)and phenol,while the coexisting inorganic anions had negative effects. In addition,hydroxyl radical and holes were proved to dominate the phenol degradation,whereas photogenerated electrons directly reduced the Cr(Ⅵ).更多还原