【摘要】 用十二烷基磺酸钠对Ag/TiO2光催化剂表面进行了改性,分析了不同酸碱条件下光催化剂表面对烯酰吗啉分子的吸附和氢键的形成情况。在紫外光条件下,以Ag沉积量为0.125%(摩尔分数)的纳米Ag/TiO2为催化剂,对浓度为100 mg.L-1的烯酰吗啉稀水溶液进行光催化降解,5 h降解率为94%。根据降解过程对烯酰吗啉浓度的高效液相色谱分析、液-质联用色谱分析和紫外-可见光谱分析,探讨了烯酰吗啉的可能分解路径。更多还原

【Abstract】 The photocatalyst Ag/TiO2 was modified with SDS,the behavior of adsorption of dimethomorph and the formation of hydrogen bond were also investigated on the surface of photocatalyst under different of pH value.With nano-0.125% (%,mole fraction) Ag/TiO2 as a photocatalyst,the 100 mg·L-1 dimethomorph solution degraded under UV-light irradiation.The rate of photodegradation was 94% in 5 h.Finally,a possible degradation pathway of DMM was proposed based on the analyses of concentration of dimethomorph in the solution by HPLC,LS-MS and UV-Vis spectra during the degradable process.更多还原