钴铈复合氧化物催化降解2,4,6-三氯酚

Catalytic Dgradation of 2,4,6-Trichlorophenol by Cobalt-Cerium Complex Oxides

采用溶胶-凝胶法制备了一种疏松多孔的钴铈复合氧化物,该复合氧化物具有较大的比表面积和孔体积。并以废水中一定浓度的2,4,6-三氯酚作为模型化合物,研究自制的钴铈复合氧化物对水中的2,4,6-三氯酚的催化降解效果。研究结果表明,自制的钴铈复合氧化物所具有的氧化还原性能以及协同催化作用使其对废水中的2,4,6-三氯酚具有一定的催化降解活性。初始溶液的pH值对降解影响较大,酸性条件更有利于2,4,6-三氯酚的降解。100 mg自制的钴铈复合氧化物与10 m L 100 mg/L的2,4,6-三氯酚在25℃下恒温振荡30 h,2,4,6-三氯酚的降解率可达到86.3%,溶液中可被氧化的有机物含量下降了36.7%。

The loose and porous cobalt-cerium complex oxides were prepared by sol-gel method with high specific surface area and larger pore volume. The catalytic degradation effect of the prepared cobalt-ceri- um composite oxiaes on 2,4,6-trichlorophenol as model compound in the wastewater has been studied. The results showed that the cobalt-cerium composite oxides have good degradation activity on 2,4,6-trichlorophenol, because of redox ability and synergistic catalysis of cobalt-cerium composite oxides. The initial pH value of the solution was proven to have significant effect on the degradation, lower pH of the solution brought high degradation efficiency. 100 mg of cobalt-cerium composite oxide and 10 mL of 100 mg/L 2,4,6-trichlorophenol were vibrated at 25℃ for 30 h, the degradation efficiency of 2,4,6-tri- chlorophenol can reach 86.3% ,and the amounts of the organic compounds apt to be oxidized decreased by 36.7%.