材料科学
X射线光电子能谱
光催化
异质结
光电流
光降解
化学工程
降级(电信)
吸收(声学)
复合数
反应速率常数
吸收光谱法
石墨氮化碳
可见光谱
辐照
纳米技术
光化学
核化学
傅里叶变换红外光谱
纳米复合材料
罗丹明B
作者
Jungang Yi,Kun Wu,Huadong Wu,Jia Guo,Linfeng Zhang,Hao Li,Jianding Li
出处
期刊:NANO
[World Scientific]
日期:2021-05-12
标识
DOI:10.1142/s1793292021500636
摘要
The presence of the antibiotics in the wastewater has posed a huge risk to aquatic life and human health. It is a great significance to develop an effective technology to treat the antibiotics-containing wastewater. In this study, a series of g-C 3 N 4 /NH 2 -MIL-88B(Fe) composite photocatalysts are synthesized through a simple one-step method. The structure and optical properties of prepared photocatalysts are detected by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectra (UV–Vis DRS), photoluminescence (PL) spectroscopy and transient photocurrent techniques, respectively. FESEM and TEM show that MOF is uniformly dispersed in petaloid g-C 3 N 4 . The uniform dispersion of Fe-MOFs in the heterojunction composites increases the specific surface area ([Formula: see text] of g-C 3 N 4 , which results in a great adsorption property for the nanocomposite. The capture experiment shows that [Formula: see text][Formula: see text] and [Formula: see text] are the main active substances in ciprofloxacin (CIP) degradation. These prepared composite photocatalysts exhibit excellent CIP photodegradation activity under visibly light irradiation with an apparent rate constant of 0.0127[Formula: see text][Formula: see text] (3.74 times as the rate of single component). The remarkable catalytic performance can be ascribed to the fact that the g-C 3 N 4 /NH 2 -MIL-88B(Fe) heterojunction inhibits the recombination of photoinduced electron–hole pairs and improved the visible light absorption.
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