Ultraviolet (UV) photodecontamination of chemical warfare agents (CWAs) has been an attractive way for decontamination of target areas unapproachable by a wet chemical method. Herein, decontamination was demonstrated using UV and infrared lamps and a home-built scanning 266-nm pulse laser under air and N₂ conditions for the G-series nerve agent simulant model molecules of dimethyl methylphosphonate, dimethyl phosphite, diethyl methylphosphonate, and diethyl phosphite contaminating TiO₂/Ti sheets. Volatile secondary photodecomposition products were examined by gas chromatography and mass spectrometry, and nonvolatile surface residues by X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction crystallography, and Fourier-transform infrared spectroscopy. The wavelength- and power-dependent mechanisms of the formation of diverse secondary products, the role of active O₂⁻, h⁺ and •OH species, and the mechanisms of dissociative adsorption and photodecontamination were fully discussed and found valuable for the development of a remote laser photodecontamination method applicable to diverse CWA-contaminated target areas.

化学战剂 (CWA) 的紫外线 (UV) 光去污已成为对湿化学方法无法接近的目标区域进行去污的一种有吸引力的方法。在此，在空气和 N ₂条件下，使用紫外和红外灯以及自制的扫描 266 nm 脉冲激光对甲基膦酸二甲酯、亚磷酸二甲酯、甲基膦酸二乙酯和亚磷酸二乙酯的 G 系列神经毒剂模拟物模型分子进行了净化污染的TiO ₂/Ti 床单。挥发性二次光分解产物通过气相色谱法和质谱法进行检测，非挥发性表面残留物通过 X 射线光电子能谱、能量色散 X 射线光谱法、X 射线衍射晶体学和傅里叶变换红外光谱法进行检测。充分讨论了形成多种副产物的波长和功率依赖性机制、活性 O ₂ ^-、h ⁺和 •OH 物种的作用，以及解离吸附和光去污的机制，并发现对于开发适用于各种 CWA 污染目标区域的远程激光光净化方法。