有机磷农药造成的环境污染(例如,三唑磷)是一个不断升级的担忧。为了缓解这个问题,介绍了一种新型Al6Si2O13/WO2.72(ASO/WO)纳米复合光催化剂,显着增强了三唑磷的光催化降解。优化的纳米复合材料具有60.0%ASO负载(60-ASO/WO),在140.0min内对三唑磷的降解率为86.3%,略高于60-ASO/WO3(72.6%),显著优于单个ASO(65.0%),WO(59.5%),和WO3(56.2%)。该催化剂在5次循环后保持88.9%的活性,展示卓越的效率和稳定性。此外,其电化学表面积(ECSA,310.0cm2),总有机碳(TOC,去除率为73.7%),光电流,和电化学阻抗都是最佳的。X射线光电子能谱(XPS),电子顺磁共振(EPR),和理论计算阐明了氧空位和S方案异质结在增强电荷分离和光催化性能中的关键作用,证实了氧缺陷和S方案的协同作用。虽然个别因素可以提高光催化活性,它们的组合导致更明显的效果。液相色谱-质谱(LCMS)确定了主要的降解中间体,包括1-苯基-3-羟基-1,2,4-三唑,硫代磷酸二乙酯,和3,5,6-三氯-2-吡啶,强调材料在环境修复中的潜力。
The environmental contamination caused by organophosphorus pesticides (for example, triazophos) is an escalating concern. To mitigate this issue, this study introduces a novel Al6Si2O13/WO2.72 (ASO/WO) nanocomposite
photocatalyst, which markedly enhances the photocatalytic degradation of triazophos. The optimized nanocomposite material with a 60.0 % ASO loading (60-ASO/WO) achieves a degradation rate of 86.3 % for triazophos within 140.0 min, marginally exceeding 60-ASO/WO3 (72.6 %) and significantly outperforming individual ASO (65.0 %), WO (59.5 %), and WO3 (56.2 %). This catalyst retains 88.9 % of its activity after five cycles, showcasing exceptional efficiency and stability. Additionally, its electrochemical surface area (ECSA, 310.0 cm2), total organic carbon (TOC, removal rate of 73.7 %), photocurrent, and electrochemical impedance are all optimal. X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), and theoretical calculations elucidate the critical role of oxygen vacancies and the S-scheme heterojunction in augmenting charge separation and photocatalytic performance, corroborating the synergistic effect of oxygen defects and the S-scheme. While individual factors can enhance photocatalytic activity, their combination results in a more pronounced effect. Liquid chromatography-mass spectrometry (LCMS) identifies the principal degradation intermediates, including 1-phenyl-3-hydroxy-1, 2, 4-triazole, diethyl thiophosphate, and 3, 5, 6-trichloro-2-pyridinol, underscoring the material\'s potential in environmental remediation.