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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%。
A porous porous composite oxide of cerium and cerium was prepared by sol-gel method. The composite oxide has large specific surface area and pore volume. The catalytic degradation of 2,4,6-trichlorophenol in water was studied by using 2,4,6-trichlorophenol in wastewater as model compound. The results show that the redox performance of the self-made cobalt-cerium composite oxide and its synergistic catalysis have certain catalytic activity on the 2,4,6-trichlorophenol in the wastewater. The pH value of the initial solution has a greater impact on the degradation, acidic conditions are more conducive to the degradation of 2,4,6-trichlorophenol. 100 mg homemade cobalt-cerium composite oxide and 10 m L 100 mg / L 2,4,6-trichlorophenol were heated at 25 ℃ for 30 h, the degradation rate of 2,4,6-trichlorophenol reached 86.3%. The content of organic compounds that can be oxidized in the solution decreased by 36.7%.