Faculty of Science, Malek-ashtsr University of Technology, Shahin-shahr, Iran.
Environ Technol. 2010 Oct;31(11):1183-90. doi: 10.1080/09593330903414220.
The bleaching of Congo red was studied in the presence of zinc sulphide nanoparticles doped with Co2+ ion. The nanoparticles of zinc sulphide, doped with cobalt, were synthesized by controlled coprecipitation in the presence of mercaptoethanol as a capping agent. The characterization of nanoparticles was studied using UV-Vis spectra, XRD pattern and SEM and TEM images. The size of the nanoparticles was determined to be 10-40 nm. A maximum dye degradation of 94% was obtained under UV irradiation for 120 min. Also, a destruction of 98% was achieved under sunlight irradiation in 12 h at the optimum conditions. The photoreactivity and reproducibility of the proposed photocatalyst was compared with Degussa P25. The photodegradation of Congo red was investigated in real water containing carbonate, bicarbonate and sulphate ions. The pseudo-first-order rate constant, k, was 2.2 x 10(-2) min(-1) and 2.9 x 10(-2) h(-1) under UV and sunlight irradiations, respectively.
在 Co2+ 掺杂的硫化锌纳米粒子存在下研究了刚果红的漂白。通过在巯基乙醇作为封端剂存在下的控制共沉淀合成了钴掺杂的硫化锌纳米粒子。使用 UV-Vis 光谱、XRD 图谱和 SEM 和 TEM 图像研究了纳米粒子的特性。纳米粒子的尺寸确定为 10-40nm。在 120 分钟的 UV 照射下，最大染料降解率达到 94%。在最佳条件下，太阳光照射 12 小时，可达到 98%的破坏率。与 Degussa P25 相比，评估了所提出的光催化剂的光反应性和重现性。在含有碳酸盐、碳酸氢盐和硫酸盐离子的实际水中研究了刚果红的光降解。在 UV 和阳光照射下，假一级速率常数 k 分别为 2.2×10(-2) min(-1)和 2.9×10(-2) h(-1)。
