title: Sol-hydrothermal synthesis of inorganic-framework molecularly imprinted TiO2/SiO2 nanocomposite and its preferential photocatalytic degradation towards target contaminant.
abstract: Inorganic-framework molecularly imprinted TiO2/SiO2 nanocomposite (MIP-TiO2/SiO2) was successfully prepared by sol-hydrothermal method using 4-nitrophenol as template. The morphology, structure, optical property, zeta-potential and photocurrent of MIP-TiO2/SiO2 were characterized. The adsorption performance and photocatalytic selectivity were also studied. MIP-TiO2/SiO2 shows higher adsorption capacity and selectivity than the non-imprinted TiO2/SiO2 (NIP-TiO2/SiO2). Kinetics results show that the adsorption equilibrium of 4-nitrophenol on MIP-TiO2/SiO2 is established within 20 min, and the adsorption process obeys the pseudo-second-order model. Moreover, MIP-TiO2/SiO2 can completely degrade 4-nitrophenol within 30 min, while NIP-TiO2/SiO2 takes 110 min. It was found that the MIP-TiO2/SiO2 photocatalyst shows molecular recognition ability, leading to selective adsorption and molecular recognitive photocatalytic degradation of 4-nitrophenol. Furthermore, because of its inorganic framework, MIP-TiO2/SiO2 shows excellent reusability.
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
authors: Fang
authors: F
authors: Deng
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
authors: Yin
authors: Y
authors: Liu
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China. Electronic address: luoxubiao@126.com.
authors: Xubiao
authors: X
authors: Luo
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
authors: Shaolin
authors: S
authors: Wu
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China. Electronic address: sllou@hnu.edu.cn.
authors: Shenglian
authors: S
authors: Luo
authors: Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China.
authors: Chaktong
authors: C
authors: Au
authors: Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
authors: Ruoxi
authors: R
authors: Qi
mesh_terms: D000327:Adsorption; D002384:Catalysis; D004563:Electrochemistry; D054802:Molecular Imprinting; D053761:Nanocomposites / Q000737:chemistry* / Q000528:radiation effects; D009596:Nitrophenols / Q000737:chemistry* / Q000528:radiation effects; D055668:Photochemical Processes; D012822:Silicon Dioxide / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D009596:Nitrophenols; C507641:TiO2-SiO2; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide; D014025:Titanium; C024836:4-nitrophenol
keywords: Molecular recognition; Molecularly imprinted photocatalyst; Photocatalytic ability; Sol-hydrothermal method; TiO(2)/SiO(2) nanocomposite