State Key Laboratory of Geological Processes & Mineral Resources, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China.
J Hazard Mater. 2012 May 30;217-218:11-8. doi: 10.1016/j.jhazmat.2011.12.053. Epub 2012 Jan 16.
Cuprous oxide is firstly created on acidized sepiolite (AS) by a simple deposition method for photocatalytic degradation of the red water produced from 2,4,6-trinitrotoluene (TNT) manufacturing. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), ultraviolet-visible diffuse reflection absorptive spectroscopy (UV-vis/DRS), and Fourier transform infrared (FT-IR) spectroscopy are used to characterize the photocatalyst composites. Gas chromatography/mass spectrometry (GC/MS) is employed to determine the organic constituents in the red water. The results show that the cuprous oxide particles can be immobilized on the surface of the AS fibers and the structure of the AS is altered when cuprous oxide interacts with AS via chemical reactions besides physical adsorption. The AS improves the optical properties of cuprous oxide and red-shifts the band gap thereby enhancing the utilization of visible light. The Cu(2)O/AS composites demonstrate excellent photocatalytic performance in the degradation of red water. 87.0% of red water can be photocatalytically degraded by Cu(2)O/AS after illumined for 5h and a majority of organic components of red water except 1,3,5-trinitrobenzene were degraded according to GC-MS analysis.
首先通过简单的沉积方法在酸化海泡石（AS）上生成氧化亚铜，用于光催化降解由制造 2,4,6-三硝基甲苯（TNT）产生的红色废水。采用 X 射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、紫外-可见漫反射吸收光谱（UV-vis/DRS）和傅里叶变换红外（FT-IR）光谱对光催化剂复合材料进行了表征。采用气相色谱/质谱（GC/MS）法测定红色废水中的有机成分。结果表明，氧化亚铜颗粒可以固定在 AS 纤维表面上，并且当氧化亚铜通过化学反应与 AS 相互作用时，除了物理吸附之外，AS 的结构也会发生改变。AS 提高了氧化亚铜的光学性能，并使带隙红移，从而增强了可见光的利用。Cu（2）O/AS 复合材料在降解红色废水中表现出优异的光催化性能。在光照 5h 后，Cu（2）O/AS 可将 87.0%的红色废水光催化降解，根据 GC-MS 分析，除了 1,3,5-三硝基苯之外，红色废水中的大多数有机成分都被降解。
