Amorphous carbon dot and chitosan based composites as fluorescent inks and luminescent films

Siddique, Abu Bakr; Singh, Vishwa Pratap; Pramanick, A K; Ray, Mallar

doi:10.1016/j.matchemphys.2020.122984

Cited by 27 publications

(14 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is of great scientific significance to use fluorescent silk for weaving, making clothes and decorations, and using the biodegradation characteristics of silk for drug treatment. Siddique et al 121 designed and developed a composite of amorphous CDs and chitosan that can be used to prepare fluorescent inks and luminescent films. The inks and films thus prepared have properties unmatched by inks and films prepared from crystalline isoforms of carbon.…”

Section: Fluorescent Productsmentioning

confidence: 99%

“…In particular, chitosan derivative fluorescent probes can combine fluorescent functional groups with the high adsorption properties of chitosan to construct multifunctional and efficient new fluorescent materials. 121…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

“…Fig. 28 Schematic diagram of the preparation of amorphous CD-chitosan composite-based fluorescent inks and luminescent films by the ultrasonic synthesis of amorphous CDs 121. …”

mentioning

confidence: 99%

See 2 more Smart Citations

Preparation and application of chitosan-based fluorescent probes

Liang

Zuo

et al. 2022

Analyst

View full text Add to dashboard Cite

show abstract

Section: Fluorescent Productsmentioning

confidence: 99%

Section: Conclusion and Prospectsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and application of chitosan-based fluorescent probes

Liang

Zuo

et al. 2022

Analyst

View full text Add to dashboard Cite

show abstract

“…One of the most common approaches, when the application has a high degree of complexity or a very specific one [ 27 , 28 , 29 , 30 ], is to create a composite system that, in addition to the fluorescent component, contains one or more of the other constituents with different properties that combine synergistically.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Ferrite Particles Produced by Sol-Gel Autocombustion and Embedded in Polysilane: An Innovative Route to Magnetically-Induced Fluorescence Composites

Samoilă¹,

Cojocaru²,

Simionescu³

et al. 2022

Molecules

View full text Add to dashboard Cite

Fluorescence detection is currently one of the commonly used techniques worldwide. Through this work, the preparation and optical properties of an interesting composite material are discussed. It is shown that encapsulating cobalt spinel ferrite (CoFe2O4), obtained by the sol-gel autocombustion method, into poly[diphenyl-co-methyl(H)]silane matrix leads to fluoromagnetic particles (PSCo) with intriguing optical properties. Transmission electron microscopy, combined with energy-dispersive X-ray analysis, showed 500 nm large spherical structures containing a core (around 400 nm in diameter) composed of magnetic ferrite particles, surrounded by a thin layer of semiconductive fluorescent polymer. The as-obtained material exhibited ferrimagnetic properties. The FTIR spectrum confirmed that the Si-H functionality of the polysilane was preserved. UV spectroscopy combined with molecular modeling studies indicated that the magnetic core had a strong influence on the intramolecular electron transitions characteristic of the σ-conjugated polysilane. Further analysis by steady-state fluorescence spectroscopy revealed that the internal magnetic field strongly enhances the polysilane emission. This property will be further investigated in the future in order to develop new detection devices.

show abstract

“…The separation and permeability of the TFC membrane mainly depend on the cross-linked polyamide (PA) layer on the surface . In recent years, many new types of FO membranes have been developed in academia and industrial companies by modifying the existing structure in PA selective layers. , Liu et al developed a new approach to enhance antibacterial property and salt rejection by immobilizing silver (Ag) nanoparticles (NPs) on a PA layer with bovine serum protein . Li et al used m -phenylenediamine (MPD)-graphene oxide (GO) aqueous solution to polymerize with trimesoyl chloride (TMC) to mix GO into a PA selective layer, which fabricates a new type of TFC-FO membrane with enhanced surface hydrophilicity and water flux .…”

Section: Introductionmentioning

confidence: 99%

Corn Stalk-Derived Carbon Quantum Dots with Abundant Amino Groups as a Selective-Layer Modifier for Enhancing Chlorine Resistance of Membranes

Wang

Zhang

Cai

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Low permeability and chlorine resistance of normal thin-film composite (TFC) membranes restrict their practical applications in many fields. This study reports the preparation of a high chlorine-resistant TFC membrane for forward osmosis (FO) by incorporating corn stalk-derived N-doped carbon quantum dots (N-CQDs) into the selective polyamide (PA) layer to construct a polydopamine (PDA) sub-layer (PTFCCQD). Membrane modification is characterized by surface morphology, hydrophilicity, Zeta potential, and roughness. Results show that TFCCQD (without PDA pretreatment) and PTFCCQD membranes possess greater negative surface charges and thinner layer-thickness (less than 68 nm). With N-CQDs and PDA pretreatment, the surface roughness of the PTFCCQD membrane decreases significantly with the co-existence of microsized balls and flocs with a dense porous structure. With the variation of concentration and type of draw solution, the PTFCCQD membrane exhibits an excellent permeability with low J (reverse salt flux)/J (water flux) values (0.1-0.25) due to the enhancement of surface hydrophilicity and the shortening of permeable paths. With 16,000 ppm·h chlorination, reverse salt flux of the PTFCCQD membrane (8.4 g m–2 h–1) is far lower than those of TFCCQD (136.2 g m–2 h–1), PTFC (127.6 g m–2 h–1), and TFC (132 g m–2 h–1) membranes in FO processes. The decline of salt rejection of the PTFCCQD membrane is only 8.2%, and the normalized salt rejection maintains 0.918 in the RO system (16,000 ppm·h chlorination). Super salt rejection is ascribed to the existence of abundant NH bonds (N-CQDs), which are preferentially chlorinated by free chlorine to reduce the corrosion of the PA layer. The structure of the PA layer is stable during chlorination also due to the existence of various active groups grafted on the surface. This study may pave a new direction for the preparation of durable biomass-derivative (N-CQD)-modified membranes to satisfy much more possible applications.

show abstract

Amorphous carbon dot and chitosan based composites as fluorescent inks and luminescent films

Cited by 27 publications

References 56 publications

Preparation and application of chitosan-based fluorescent probes

Preparation and application of chitosan-based fluorescent probes

Cobalt Ferrite Particles Produced by Sol-Gel Autocombustion and Embedded in Polysilane: An Innovative Route to Magnetically-Induced Fluorescence Composites

Corn Stalk-Derived Carbon Quantum Dots with Abundant Amino Groups as a Selective-Layer Modifier for Enhancing Chlorine Resistance of Membranes

Contact Info

Product

Resources

About