Mardani Hamid Reza, Forouzani Mehdi, Ziari Mitra, Biparva Pourya
Department of Chemistry, Payame Noor University (PNU), PO BOX 19395-4697, Tehran, Iran.
Department of Chemistry, Payame Noor University (PNU), PO BOX 19395-4697, Tehran, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Apr 15;141:27-33. doi: 10.1016/j.saa.2015.01.034. Epub 2015 Jan 28.
CuxZn(1-x)O, FexZn(1-x)O (x=0.01) and ZnO nanoparticles were and were characterized by X-ray diffraction, ultraviolet and visible spectroscopy, FTIR spectroscopy and SEM. The photodegradation of an aqueous solution of methylene blue (as an organic pollutant) by nanoparticles with H2O2 (30%) under visible light and the progress of the reaction were monitored by UV-Vis spectroscopy absorption. The photocatalytic oxidation efficiency of all nanoparticles was 100% at the appropriate time. The degradation time was 90 min for FeZnO, 120 min for CuZnO and 210 min for ZnO. This indicates that the photocatalytic activity of the doped nanoparticles was better than that of ZnO alone. ZnO doped with a small amount of Fe or Cu decreased the size of the nanoparticles and the band gap and increased photocatalytic efficiency.
制备了CuxZn(1-x)O、FexZn(1-x)O（x = 0.01）和ZnO纳米颗粒，并通过X射线衍射、紫外可见光谱、傅里叶变换红外光谱和扫描电子显微镜对其进行了表征。在可见光下，用纳米颗粒与30%的H2O2对亚甲基蓝水溶液（作为有机污染物）进行光降解，并通过紫外可见光谱吸收监测反应进程。在适当时间，所有纳米颗粒的光催化氧化效率均为100%。FeZnO的降解时间为90分钟，CuZnO为120分钟，ZnO为210分钟。这表明掺杂纳米颗粒的光催化活性优于单独的ZnO。掺杂少量Fe或Cu的ZnO减小了纳米颗粒的尺寸和带隙，并提高了光催化效率。
