title: Conferring Natural-Derived Porous Microspheres with Surface Multifunctionality through Facile Coordination-Enabled Self-Assembly Process.
abstract: In this study, multifunctional chitin microspheres are synthesized and utilized as a platform for multiple potential applications in enzyme immobilization, catalytic reduction and adsorption. Porous chitin microspheres with an average diameter of 111.5 μm and a porous architecture are fabricated through a thermally induced phase separation method. Then, the porous chitin microspheres are conferred with surface multifunctionality through facile coordination-enabled self-assembly of tannic acid (TA) and titanium (Ti(IV)) bis(ammonium lactate)dihydroxide (Ti-BALDH). The multipoint hydrogen bonds between TA and chitin microspheres confer the TA-Ti(IV) coating with high adhesion capability to adhere firmly to the surface of the chitin microspheres. In view of the biocompatibility, porosity and surface activity, the multifunctional chitin microspheres are used as carriers for enzyme immobilization. The enzyme-conjugated multifunctional porous microspheres exhibit high catalytic performance (102.8 U·mg(-1) yeast alcohol dehydrogenase). Besides, the multifunctional chitin microspheres also find potential applications in the catalytic reduction (e.g., reduction of silver ions to silver nanoparticles) and efficient adsorption of heavy metal ions (e.g., Pb(2+)) taking advantages of their porosity, reducing capability and chelation property.
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Han
authors.affiliation: School of Environment Science and Engineering, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.
authors.forename: Jiafu
authors.initials: J
authors.lastname: Shi
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.
authors.forename: Teng
authors.initials: T
authors.lastname: Nie
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.
authors.forename: Xueyan
authors.initials: X
authors.lastname: Wang
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Yang
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.|Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University , Tianjin 300072, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Wu
authors.affiliation: Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) ,Tianjin 300072, China.
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Jiang
mesh_terms: D000426:Alcohol Dehydrogenase / Q000737:chemistry*; D002686:Chitin / Q000737:chemistry*; D008863:Microspheres; D016062:Porosity; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D029701:Saccharomyces cerevisiae Proteins / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D029701:Saccharomyces cerevisiae Proteins; D013634:Tannins; D002686:Chitin; D014025:Titanium; D000426:Alcohol Dehydrogenase
keywords: TA−TiIV coating; chitin; coordination-enabled self-assembly; multifunctionality; porous microspheres