Novel chitosan-ZnO based nanocomposites as luminescent tags for cellulosic materials

Conducting PANI stimulated ZnO system for visible light photocatalytic degradation of coloured dyes

“…The PANI/ZnO nanocomposites revealed broad and low intensity peaks that signifies the indication of smaller size and possess low crystallinity nanocomposites. The declaration was promised with the previous reports [21,[25][26][27][31][32][33]. The nanocomposite materials express low crystallinity and small size because of the intermolecular interaction between conducting PANI and ZnO nanoparticles [21,[25][26].…”

“…When increasing the PANI quantity into ZnO nanoparticles, it gets dispersed and gives more aggregation, because of the intermolecular interaction between PANI and ZnO nanoparticles [21,[25][26][31][32][33] which were evidently shown in Fig 2 (d). This statement coincides with the previous literatures [21,[25][26]33].…”

An overview of luminescent bio‐based composites

“…The use of ZnO‐based nanocomposites as luminescent tags for cellulosic materials and suitable for use as printed security materials was described by Saeed et al Specifically, chitosan–ZnO nanospheres and chitosan–ZnO–oleic acid QDs were obtained. These novel ZnO nanocomposites showed distinct photoluminescent emissions bands at ∼ 420 nm attributed to the interstitial oxygen, at 485 nm probably originated by the electron transition from the ionized oxygen vacancies level to the valence band, and at ∼ 530 nm related to the deep level.…”

“…These chitosan‐based luminescent materials were firstly used as coatings for electrodes . Nevertheless, their preparation in other forms as regular films, nanospheres/microspheres, or only as capping agent have also been reported as strategies to get advanced luminescent bio‐based materials for distinct applications.…”

Emission‐Color Control in Polymer Films by Memorized Fluorescence Solvatochromism in a New Class of Totally Organic Fluorescent Nanogel Particles

“…Quantumd ots mainly indicate nanoscale semiconductor crystals, and their bandgap can be adjusted depending on the size by the quantum effect. Quantum dots also have features, such as light emission in aw ide wavelength region, high brightness, and long fluorescencel ifetime, [1a, 9] and are expected to be suitable for applicationi n, for example.,s olar cells, [10] security tags [11] and lighting [12] andd isplays, [13] but there are many issues that still need to be solved, such as high cost, low stability,a nd poor dispersibility.…”