15 documents found, page 1 of 2
Double-defense barrier design for anti-fouling separation membrane with the bio...
Yang, Xue; Chen, Xinyi; Cavaco-Paulo, Artur; Wang, Hongbo; Su, JingMembrane fouling, including the accumulation of bacteria, oil and dyes on the membrane surface, could reduce the permeability and selectivity of the separation membrane. This work proposes a double-defense barrier, integrating the biological catalysis and hydrogel coating on the separation membrane. The first defense barrier was designed by coating polyvinyl alcohol, sodium carboxymethylcellulose and tannic aci...
Construction of a stable manganese/copper core-shell laccase-like enzyme for re...
Chen, Xinyi; Tao, Wenwen; Xu, Ruiguang; Mo, Taoling; Yang, Xue; Cavaco-Paulo, Artur; Su, Jing; Wang, HongboLaccase shows significant potential for environmental remediation, yet its practical implementation is limited by inherent instability and restricted reusability. To address these limitations, we successfully synthesized a Mn/Cu-based core-shell structured laccase-like enzyme (SiO2@APTCu-MnO2) using a sol-gel method coupled with an in situ sacrificial strategy. Compared to natural laccase, SiO2@APTCu-MnO2 exhib...
Enzymatic synthesis of biosafe hematoxylin dyes on hair: enhanced post-dyeing h...
Chen, Xiangcheng; Liu, Lei; Guo, Xinrui; Wang, Hongbo; Cavaco-Paulo, Artur; Su, JingTraditional hair dyes pose significant health and environmental risks due to toxic components like p-phenylenediamine (PPD) and exhibit suboptimal color fastness despite their widespread use. To overcome these limitations, we introduce an eco-efficient enzymatic hair dyeing strategy based on laccase-catalyzed polymerization of hematoxylin, utilizing atmospheric oxygen as a green oxidant and generating water as ...
A backbone support structure and capillary effect-induced high-flux MOF-based m...
Yang, Xue; Chen, XinYi; Su, Xiaolei; Cavaco-Paulo, Artur; Wang, Hongbo; Su, JingMetal-organic frameworks (MOFs) based mixed-matrix membranes (MMMs) exhibited an excellent promise for separating dye molecules and salt ions due to their permeability and selectability. However, controlling interfacial compatibility between the polymer and MOFs remained challenging, and MOF-based MMMs were poorly processable. Herein, the dual-bath coagulation method was developed to form the polyvinylidene flu...
Co-immobilizing laccase-mediator system by in-situ synthesis of MOF in PVA hydr...
Yang, Xue; Chen, Xinyi; Wang, Hongbo; Cavaco-Paulo, Artur; Su, JingThe laccase mediator system (LMS) with a broad substrate range has attracted much attention as an efficient approach for water remediation. However, the practical application of LMS is limited due to their high solubility, poor stability and low reusability. Herein, the bimetallic Cu/ZIFs encapsulated laccase was in-situ grown in poly (vinyl alcohol) (PVA) polymer matrix. The PVA-Lac@Cu/ZIFs hydrogel was formed...
Synthesis of phenylalanine/manganese-copper supramolecular sheets with laccase-...
Chen, Xinyi; Yang, Xue; Su, Xiaolei; Cavaco-Paulo, Artur; Su, Jing; Wang, HongboEnzyme mimics with laccase-like activity showing excellent stability and tolerance have attracted extensive interest in phenolic pollutants treatment. Herein, we presented a mild and convenient strategy for the preparation of laccase-like sheets (denoted as Mn-F-Cu) inspired by the supramolecular self-assembly of the transition metals manganese, copper, and L-phenylalanine (F) under room temperature, alkaline c...
Polydopamine bridging encapsulated laccase on MOF-based mixed-matrix membrane f...
Yang, Xue; Chen, XinYi; Su, Xiaolei; Cavaco-Paulo, Artur; Wang, Hongbo; Su, JingMixed-matrix membranes (MMMs) exhibit significant potential for dye/salt separation. However, overcoming the trade-off between permeability and selectivity, as well as membrane fouling, remains a formidable task. In this work, a biocatalytic membrane was prepared using polydopamine (PDA) as a bridge connecting the metal-organic framework (MOF)-based MMM and immobilized laccase. The MOF-based MMM featured an int...
Anti-biofouling membrane coated with polyvinyl alcohol/sodium carboxymethylcell...
Yang, Xue; Chen, Xinyi; Su, Xiaolei; Cavaco-Paulo, Artur; Wang, Hongbo; Su, JingBiofouling is the most severe challenge for separation membranes. In this study, a metal-organic framework (MOF)-based mixed-matrix membranes (MMMs) with polyvinyl alcohol (PVA)/sodium carboxymethylcellulose (CMC)/tannic acid (TA) hydrogel coating exhibited a comprehensive anti-biofouling property and high efficient for dye/salt separation. For the hydrogel layer, ethanol inhibited the cross-linking of the hydr...
Encapsulated laccase in bimetallic Cu/Zn ZIFs as stable and reusable biocatalys...
Yang, Xue; Zhao, Jing; Cavaco-Paulo, Artur; Jing Su; Wang, HongboLaccase have received extensive attention in pollutant degradation, but its practical viability is largely affected by the poor stability, easy inactivation and difficulty in recycling for the present. Enzyme immobilization offers enhanced enzyme stability and constructs a synergistic system for the efficient adsorption and degradation of pollutants. In this study, bimetallic Cu/Zn ZIFs were synthesized by co-p...
Laccase-catalyzed synthesis of added-value polymers from cork and grape extracts
Li, Nannan; Freitas, David Silva; Santos, Joana; Venâncio, Armando; Noro, Jennifer Martins; Su, Jing; Wang, Hongbo; Silva, Carla; Cavaco-Paulo, ArturThe development of products from natural plant sources, including agriculture and food wastes, contributes significantly to the circular economy and global sustainability. Cork and grape wastes were employed as the primary sources in this study to obtain compounds of interest under mild extraction conditions. Laccase was applied to oxidize the cork and grape extracts, with the aim of producing value-added molec...