TiO/AC和TiO/CNT纳米复合材料对甲基橙光催化降解性能的比较。

Comparison of the photocatalytic performance of TiO/AC and TiO/CNT nanocomposites for methyl orange photodegradation.

作者信息

Wang Liping, Guo Jingru, Dang Jingjing, Huang Xiaojun, Chen Si, Guan Weisheng

机构信息

College of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, China and Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, China E-mail:

出版信息

Water Sci Technol. 2018 Oct;78(5-6):1082-1093. doi: 10.2166/wst.2018.374.

DOI:10.2166/wst.2018.374

PMID:30339533

Abstract

To enhance the photocatalytic degradation efficiency of TiO on methyl orange (MO) removal, TiO/AC (activated carbon) and TiO/CNT (carbon nanotube) composites were synthesized. The prepared catalysts were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The photocatalytic performance of the obtained composites were investigated by the degradation of MO under UV irradiation (254 nm, 365 nm). The results revealed that the prepared nanocomposite showed higher MO degradation efficiency than pure nano-TiO. Additionally, batch experiments of influencing factors, including HO dosage, metal dopants, inorganic anions, chloride ion concentration and ultraviolet wavelength on the MO removal efficiency were also conducted. The results demonstrated that metal dopant and the presence of HO significantly enhanced MO removal efficiency.

摘要

为提高二氧化钛（TiO）对甲基橙（MO）的光催化降解效率，合成了TiO/AC（活性炭）和TiO/CNT（碳纳米管）复合材料。通过扫描电子显微镜（SEM）、X射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）对制备的催化剂进行了表征。通过在紫外光（254 nm、365 nm）照射下降解MO来研究所得复合材料的光催化性能。结果表明，制备的纳米复合材料对MO的降解效率高于纯纳米TiO。此外，还进行了影响因素的批量实验，包括羟基自由基（HO）用量、金属掺杂剂、无机阴离子、氯离子浓度和紫外波长对MO去除效率的影响。结果表明，金属掺杂剂和HO的存在显著提高了MO的去除效率。