Photocatalytic Degradation of Perfluorooctanoic Acid (PFOA) with β-Ga2O3at Reductive Atmosphere
Photocatalytic degradation of perfluorooctanoic acid (PFOA) with wide bandgap β-Ga2O3 at reductive atmosphere was studied. β-Ga2O3 was first prepared and characterized by XRD, TEM and UV-vis diffuse reflection techniques. Photocatalytic degradation of PFOA was carried out in the presence of thiosulfate (S2O3 2-) and N2 bubbling and results displayed that decomposition was 98% and defluorination was 32% after 3 h, when used UV light (λ=254 nm) power was 15 W, dosage of S2O3 2- and β-Ga2O3 was 50 μM and 0.5 g/L, respectively. Degradation abided by pseudo first-order kinetics and kinetics constant (k) was 0.024 min-1 and half life (t1/2) was 28.88 min. Produced intermediates were detected by LC-MS and spectrum revealed that PFOA was attacked by photoinduced electrons and shorter chain perfluorocarboxylic acids (CnF2n+1COOH, 1≤n≤6) and fluoride ion were the major products in aqueous solution.
ZHAO Baoxiu ZHANG Pengyi L(U) Mou ZHOU Li
School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment,Ts School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033,
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
152-156
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）