Haque M M, Muneer M
Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
J Hazard Mater. 2007 Jun 25;145(1-2):51-7. doi: 10.1016/j.jhazmat.2006.10.086. Epub 2006 Nov 6.
The photocatalytic degradation of an antibiotic norfloxacin [1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline-carboxylic acid, 1], has been investigated in aqueous suspensions of titanium dioxide (TiO(2)) under a variety of conditions. The degradation was studied by monitoring the change in substrate concentration employing UV spectroscopic analysis technique and depletion in total organic carbon (TOC) content as a function of irradiation time. The degradation kinetics were investigated under different conditions such as different types of TiO(2), pH (ranging from 4 to 11), catalyst concentration (0.5-3gL(-1)), substrate concentration (0.15-0.5mM) and in the presence of electron acceptor such as hydrogen peroxide (H(2)O(2), 10mM) besides molecular oxygen. Semiconductor titanium dioxide (Degussa P25) was found to be more efficient as compared with other photocatalysts.
在多种条件下，研究了抗生素诺氟沙星[1-乙基-6-氟-1,4-二氢-4-氧代-7-(1-哌嗪基)-3-喹啉羧酸，1]在二氧化钛（TiO₂）水悬浮液中的光催化降解。通过采用紫外光谱分析技术监测底物浓度的变化以及总有机碳（TOC）含量随照射时间的减少来研究降解情况。在不同条件下研究了降解动力学，如不同类型的TiO₂、pH值（4至11）、催化剂浓度（0.5 - 3gL⁻¹）、底物浓度（0.15 - 0.5mM），以及除分子氧外还存在电子受体如过氧化氢（H₂O₂，10mM）的情况。发现半导体二氧化钛（德固赛P25）与其他光催化剂相比更有效。
