Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
J Hazard Mater. 2010 Sep 15;181(1-3):886-97. doi: 10.1016/j.jhazmat.2010.05.096. Epub 2010 Jun 8.
Optimization of photocatalytic degradation of C.I. Basic Blue 3 (BB3) under UV light irradiation using TiO(2) nanoparticles in a rectangular photoreactor was studied. The investigated TiO(2) was Millennium PC-500 (crystallites mean size 5-10 nm) immobilized on non-woven paper. Central composite design was used for optimization of UV/TiO(2) process. Predicted values of decolorization efficiency were found to be in good agreement with experimental values (R(2)=0.9686 and Adj-R(2)=0.9411). Optimization results showed that maximum decolorization efficiency was achieved at the optimum conditions: initial dye concentration 10mg/L, UV light intensity 47.2 W/m(2), flow rate 100 mL/min and reaction time 120 min. Photocatalytic mineralization of BB3 was monitored by total organic carbon (TOC) decrease, and changes in UV-vis and FT-IR spectra. The photodegradation compounds were analyzed by UV-vis, FT-IR and GC-mass techniques. The degradation pathway of BB3 was proposed based on the identified compounds.
采用 TiO2 纳米粒子在矩形光反应器中紫外光照射下优化 C.I.碱性蓝 3（BB3）的光催化降解。所研究的 TiO2 是固定在无纺纸上的 Millennium PC-500（结晶粒度为 5-10nm）。采用中心复合设计对 UV/TiO2 工艺进行优化。发现脱色效率的预测值与实验值吻合良好（R2=0.9686，Adj-R2=0.9411）。优化结果表明，在最佳条件下可达到最大脱色效率：初始染料浓度 10mg/L、紫外光强度 47.2W/m2、流速 100mL/min 和反应时间 120min。通过总有机碳（TOC）的减少和紫外可见光谱及傅里叶变换红外光谱的变化来监测 BB3 的光催化矿化。通过紫外可见光谱、傅里叶变换红外光谱和 GC-MS 技术分析光降解产物。根据鉴定的化合物提出了 BB3 的降解途径。
