1,10-Dichlorodecane (D2C10) is shown to be effectively photodegraded in aqueous suspensions of TiO2 using a photoreactor equipped with 300 nm lamps. Solutions exposed to UV light intensities of 3.6 × 10-5 Ein L-1 min-1, established by ferrioxalate actinometry, showed negligible direct photolysis in the absence of TiO2. The degradation rate was optimal with 150 mg/L of TiO2 and a D2C10 concentration (240 μg/L) approaching its solubility limit. Kinetics of photodegradation followed a Langmuir−Hinshelwood model suggesting that the reaction occurred on the surface of the photocatalyst. The presence of h+vb and OH• radical scavengers, including methanol and iodide, inhibited the degradation supporting a photooxidation reaction. Electron scavengers (Ag+, Cu2+, and Fe3+) had small effects on the degradation rate. The lack of transformation of D2C10 in acetonitrile as solvent indicated that the major oxidants were OH• radicals. The presence of tetranitromethane, effectively eliminating the formation of free OH• r...

中文翻译：

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TiO2 水悬浮液中 1,10-二氯癸烷的光催化降解：吸附的氯化烷烃与表面羟基自由基的反应

使用配备 300 nm 灯的光反应器，1,10-二氯癸烷 (D2Cl0) 在 TiO2 的水性悬浮液中被有效地光降解。暴露于 3.6 × 10-5 Ein L-1 min-1 的紫外光强度下（通过草酸铁光度计确定）的溶液在没有 TiO2 的情况下显示可忽略不计的直接光解。降解速率在 150 mg/L 的 TiO2 和 D2ClO 浓度 (240 μg/L) 接近其溶解度极限时是最佳的。光降解动力学遵循 Langmuir-Hinshelwood 模型，表明反应发生在光催化剂的表面。h+vb 和OH• 自由基清除剂（包括甲醇和碘化物）的存在抑制了支持光氧化反应的降解。电子清除剂（Ag+、Cu2+ 和 Fe3+）对降解速率的影响很小。D2ClO 在乙腈溶剂中没有发生转化表明主要的氧化剂是OH• 自由基。四硝基甲烷的存在，有效消除了游离OH•r...