A novel Ga(Ⅲ)coordination complex as an efficient sensitizer for enhancing photocatalytic activity of TiO_(2)/rGO nanocomposite

作     者：Amir Hossein Cheshme Khavar Neda Khedri Rubén Rizo Juan Miguel Feliu Martínez Ali Reza Mahjoub Masoumeh Doolabi Ehsan Aghayani Amir Hossein Cheshme Khavar;Neda Khedri;Rubén Rizo;Juan Miguel Feliu Martínez;Ali Reza Mahjoub;Masoumeh Doolabi;Ehsan Aghayani

作者机构：Department of ChemistryFarhangian UniversityTehranIran Department of ChemistryFaculty of Basic SciencesTarbiat Modares UniversityTehranIran Instituto de Electroquímica y Departamento de Química FísicaUniversidad de Alicante03080AlicanteSpain Research Center for Environmental ContaminantsAbadan University of Medical SciencesAbadanIran Department of Environmental Health EngineeringAbadan University of Medical SciencesAbadanIran 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第7期

页      面：1004-1013,I0002页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by grant No.98U587 from Abadan University of Medical Sciences 

主　　题：Gadolinium Coordination complex Sensitizer Photocatalytic Light-harvesting Rare earths 

摘      要：Narrow solar-light response range and rapid charges recombination are the main technical barriers in TiO_(2) photocatalysis *** overcome these restrictions,in this work we synthesized a novel binuclear gadolinium(Ⅲ) coordination complex,[Gd_(2)(DPDB)_6(DMF)_6(H_(2)O_()2)](DPDB=[(4-dimethylamino)phenyldiazenyl] benzenesulfonate),which was used as an inorganic sensitizer for boosting the visible light-harvesting and quantum efficiency of TiO_(2) supported-reduced graphene oxide(rGO) *** structure of [Gd_(2)(DPDB)_6(DMF)_6(H_(2)O)_(2)](Gd-CMP) was determined from single-crystal X-ray diffraction data,which indicates three-dimensional(3D) supramolecular architecture through hydrogen bonding and CH…π_(ph) *** prepared nanohybrid(Gd-CMP/TG) reveals significantly enhanced visible-light-induced photocatalytic activity for degradation of acetaminophen(ACT).The complete removal of 10 mg/L ACT is achieved over Gd-CMP/TG,and the corresponding rate constant of ACT degradation of nanohybrid is 40-fold higher than that of bare TiO_(2).In prepared ternary nanohybrid,metal-coordination sensitizer(Gd-CMP) acts as an electron donor,and at the same time,rGO serves as an electron acceptor,and the synergistic effect between them efficiently enhances charges separation and inhibits e/h pair recombination in the hybridized *** radical scavenger tests indicate that the photo-induced O_(2)^(-·) radicals dominate ACT *** the basis of the experimental results and calculated energy of electronic levels,a possible mechanism for the improved photocatalytic activity is discussed.