Scalable fabrication of rechargeable photoactive cellulose nanofibrous membranes for efficient degradation of dyes

What We Are Learning from COVID-19 for Respiratory Protection: Contemporary and Emerging Issues

“…The short lifetime (~µs) and limited diffusibility (nanometer range) of the main ROS (HO• and 1 O 2 ) ensure that their biocidal properties only persist briefly and on targeted surfaces without entering the respiratory systems or affecting the mucous membranes of wearers, which makes this a promising approach for use in PPE and especially face masks ( Figure 8 b). Commonly used PS can be classified according to their photoactive structures, such as anthraquinone [ 412 , 415 , 416 , 417 , 418 , 419 ], benzophenone [ 413 , 420 , 421 , 422 , 423 , 424 ], xanthene [ 412 , 425 , 426 , 427 , 428 , 429 ], porphyrin [ 430 , 431 , 432 ], phthalocyanines [ 433 ], and BODIPY [ 434 ] ( Figure 8 c). They have been introduced into flexible and wearable substrates to inspire the design of next-generation RPDs and face masks that possess enhanced biological protective functionality and reduce environmental concerns.…”

Chromophoric Dendrimer-Based Materials: An Overview of Holistic-Integrated Molecular Systems for Fluorescence Resonance Energy Transfer (FRET) Phenomenon

“…However, the fabrication of devices that allow for highly efficient exploitation of light energy is an aspect that remains largely unresolved [17][18][19]. Considering these backgrounds, the molecular design and the potentially adequate performance of photoactive environments emerge as promissory candidates that could play a key role in light-energy processing [20][21][22]. Specifically, molecular environments susceptible to photo-induced energy transfer could have a high potential of application to mimic nature's behavior, e.g., the photosynthesis process [23,24].…”

Antibacterial Activity of Photoactive Silk Fibroin/Cellulose Acetate Blend Nanofibrous Membranes against Escherichia coli

“…35−38 In our previous reports, we fabricated different functional silk fibroin nanofibrous membranes for various applications. 19,20 However, there are some problems with silk fibroin nanofibrous membranes, being hard and brittle in the dry state, lacking surface specificity, and tedious degradation rate control. 39,40 In recent years, many silk fibroin based blend nanofibrous membranes such as silk fibroin/chitin, 41 wool keratose/silk fibroin, 42 poly(lactic acid)/silk fibroin, 43 silk fibroin/poly-(ethylene oxide), and silk fibroin/Tussah silk fibroin were fabricated to improve performances of individual silk fibroin nanofibrous membranes.…”

“…They are considered to be very good at carrying bacteria and serving as a reservoir for the transmission of infection. Thus, antimicrobial textiles may be of great help in the recovery process of immunodeficiency patients and premature babies. − In the past few years, some inorganic nanoparticles such as titanium dioxide (TiO 2 ) were immobilized on surfaces of textile materials to produce reactive oxygen species (ROS) for killing bacteria. − However, the nanoparticles possess weak affinity for the majority of organic fibers, which greatly limits the durable immobilization of the particles onto the fiber surfaces. − Thus, organic photosensitive compounds with strong reactive groups are more attractive for various applications. − In recent years, organic photosensitive compounds were immobilized on the surface of textiles to produce antimicrobial textile products, which exhibited good antimicrobial activity. − …”

“…In our previous study, we fabricated biocidal synthetic poly­(vinyl alcohol- co -ethylene) nanofibrous membranes that can effectively kill bacteria. − However, such synthetic materials are not biodegradable, which could cause serious environmental concerns. − In contrast, the silkworm silk from Bombyx mori cocoons, as natural and biomass fibers, possesses several useful properties such as excellent biocompatibility, adaptable biodegradability, good oxygen/water vapor permeability, etc. − More importantly, the protein has amino acids with functional groups. The immobilization of various functional molecules on the surface of silk fibroin could happen easily through covalent bonding. − In our previous reports, we fabricated different functional silk fibroin nanofibrous membranes for various applications. , However, there are some problems with silk fibroin nanofibrous membranes, being hard and brittle in the dry state, lacking surface specificity, and tedious degradation rate control. , In recent years, many silk fibroin based blend nanofibrous membranes such as silk fibroin/chitin, wool keratose/silk fibroin, poly­(lactic acid)/silk fibroin, silk fibroin/poly­(ethylene oxide), and silk fibroin/Tussah silk fibroin were fabricated to improve performances of individual silk fibroin nanofibrous membranes. , Cellulose acetate (CA), as a derivative of cellulose, can be easily obtained from natural resources and recycled in the environment by biodegradation …”