新型炭材料2017，Vol.32Issue(5)：460-466,7.
活性炭表面含氧官能团对TiO2/AC的吸附和光催化活性的影响
Effects of surface oxygen functional groups on activated carbon on the adsorption and photocatalytic degradation activities of a TiO2-AC hybrid for methylene blue and methylene orange
摘要
Abstract
A series of activated carbons ( AC) with different amounts of surface oxygen functional groups was obtained by nitric acid oxidation and heat treatment at different temperatures, and these were used as supports for a TiO2 photocatalyst. The nature and num-ber of the surface oxygen functional groups were determined by Boehm titration. The pore texture and morphology of the ACs and the TiO2-AC hybrid were characterized by nitrogen adsorption and scanning electron microscopy. The adsorption and photocatalytic activi-ty of the material under ultraviolet light irradiation were investigated using methylene blue ( MB, cation dye) and methylene orange ( MO, anion dye) as the model compounds. Results show that the oxidation and heat treatment change the surface oxygen functional groups much more than they do the pore texture. The surface oxygen functional groups, especially the surface carboxylic acid, control the adsorption and photocatalytic activities for MB and MO over the TiO2-AC hybrid. The surface oxygen functional groups have a much greater influence on MB degradation than that on MO. The photocatalytic degradation activity for MB decreases at all heat treat-ment temperatures while that for MO is increased by heat treatment at 250 ℃.关键词
TiO2/活性炭/表面含氧基团/光催化活性Key words
TiO2/Activated carbon/Surface oxygenic groups/Photocatalytic activity分类
化学化工引用本文复制引用
钟永科,周斌,张成江,吴迪..活性炭表面含氧官能团对TiO2/AC的吸附和光催化活性的影响[J].新型炭材料,2017,32(5):460-466,7.基金项目
国家自然科学基金(21167018). :National Natural Science Foundation of China (21167018). （21167018）
