Solar Photocatalysis of TiO₂ Supported Natural Palygorskite Nanofibers Elaborated by a One_Pot Mechanochemical Route  

作　　者：Lakbita Omar Rhouta Benaissa Goetz Vincent Maury Francis Plantard Gaël Daoudi Lahcen Lakbita Omar;Rhouta Benaissa;Goetz Vincent;Maury Francis;Plantard Gaël;Daoudi Lahcen(Mohammed VI Polytechnic University (UM6P), Marrakech, Morocco;IMED_Lab, Faculty of Sciences and Technologies, Cadi Ayyad University, Marrakech, Morocco;PROcédés Matériaux et Energie Solaire, Rambla de la Thermodynamique, PROMES_CNRS, UPR 8521, Perpignan, France;CIRIMAT, Université de Toulouse, Toulouse, France;Laboratoire de Geoscience et Géoenvironnement, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad, Marrakech Morocco)

机构地区：[1]Mohammed VI Polytechnic University (UM6P), Marrakech, Morocco [2]IMED_Lab, Faculty of Sciences and Technologies, Cadi Ayyad University, Marrakech, Morocco [3]PROcédés Matériaux et Energie Solaire, Rambla de la Thermodynamique, PROMES_CNRS, UPR 8521, Perpignan, France [4]CIRIMAT, Université de Toulouse, Toulouse, France [5]Laboratoire de Geoscience et Géoenvironnement, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad, Marrakech Morocco

出　　处：《Journal of Minerals and Materials Characterization and Engineering》2022年第3期254-274,共21页矿物质和材料特性和工程（英文）

摘　　要：This study reports the successful synthesis of supported TiO₂_Palygorskite nanocomposites by a one-pot dry mechanochemical route. Indeed, the elaboration procedure involved an in-situ reaction between accessories carbonates present in raw fibrous palygorskite clay and titanyl sulfate (TiOSO₄) precursor under variable grinding conditions, essentially ball/solid matter mass ratio and rotation velocity. This yielded after air annealing at 600%C for 1 h to the immobilization of anatase TiO₂ nanoparticles (≈8 nm of average size) as evidenced by XRD and TEM analyses. Once the conditions of elaboration were optimized, the photocatalytic properties were evaluated under 3 conditions: artificial UV radiation, artificial solar radiation (UV + visible range) and under dynamic solar illumination taking into account the discontinuities of the solar resource. The results allowed the estimation and comparison of the catalyst’s capabilities and showed its ability to work under natural irradiation. The so developed supported photocatalysts TiO₂/Palygorskite exhibited a good activity towards the removal of Orange G (OG) dye from aqueous media under artificial UV and natural solar radiations.This study reports the successful synthesis of supported TiO₂_Palygorskite nanocomposites by a one-pot dry mechanochemical route. Indeed, the elaboration procedure involved an in-situ reaction between accessories carbonates present in raw fibrous palygorskite clay and titanyl sulfate (TiOSO₄) precursor under variable grinding conditions, essentially ball/solid matter mass ratio and rotation velocity. This yielded after air annealing at 600%C for 1 h to the immobilization of anatase TiO₂ nanoparticles (≈8 nm of average size) as evidenced by XRD and TEM analyses. Once the conditions of elaboration were optimized, the photocatalytic properties were evaluated under 3 conditions: artificial UV radiation, artificial solar radiation (UV + visible range) and under dynamic solar illumination taking into account the discontinuities of the solar resource. The results allowed the estimation and comparison of the catalyst’s capabilities and showed its ability to work under natural irradiation. The so developed supported photocatalysts TiO₂/Palygorskite exhibited a good activity towards the removal of Orange G (OG) dye from aqueous media under artificial UV and natural solar radiations.

关 键 词：TiO₂ PALYGORSKITE Mechanochemical Synthesis Nanocomposite Solar Photocatalysis Wastewater Treatment 

分 类 号：O64[理学—物理化学]