Rapid Degradation of rhodamine B over Cyclodextrin Modified TiO2
A novel β-cyclodextrin (β-CD) grafted titanium dioxide (TiO2/β-CD) was synthesized through photo-induced self assembly methods,and its structure was characterized.The TiO2/β-CD hybrid nanomaterial showed high photoactivity under visible light irradiation (λ ≥ 400 nm and/or λ ≥ 420 nm) and simulated solar irradiation (λ ≥ 365 nm).Photodegradation ofrhodamine B followed the Langmuir-Hinshelwood kinetics model.The initial rate R0 of rhodamine B degradation increased by 4.6,2.4 and 1.5 times in the irradiation conditions of λ ≥ 420 nm,λ ≥ 400 nm and λ ≥ 365 nm,respectively.β-CD increased the lifetimes of the excited states of the unreactive guests and facilitated the electron transfer from the excited dye to the TiO2 conduction band,which enhanced the dye pollutant degradation.
β-cyclodextrin rhodamine B self assembly TiO2
Xu Zhang Nansheng Deng
School of Resources and Environmental Science,Wuhan University,Wuhan,430079,P.R.China
国际会议
大理
英文
764-768
2011-08-18（万方平台首次上网日期，不代表论文的发表时间）