Photocatalytic degradation of organic contaminants under solar light using carbon dot/titanium dioxide nanohybrid, obtained through a facile approach

Hazarika, Deepshikha; Karak, Niranjan

doi:10.1016/j.apsusc.2016.03.165

Cited by 82 publications

(77 citation statements)

References 40 publications

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“…Compared to inorganic semiconductor quantum dots, CD possesses the advantages such as excellent biocompatibility, ease of synthesis, surface functionalization, etc. and is very promising for a wide range of potential applications including bio‐imaging, sensors, drug delivery, photocatalysis, light‐emitting diodes, etc ,. Previous studies revealed that CD sensitized TiO 2 nanohybrid can be fully used the visible light and the recombination of photocarriers can be effectively suppressed.…”

Section: Introductionmentioning

confidence: 76%

“…Further, TiO 2 nanoparticles are also considered as one of the most widely studied photocatalysts due to their easy abundance, superior photostability, low toxicity, low cost, and high intrinsic catalytic activity under UV illumination. Thus they offers a facile and inexpensive method for removing environmental pollutants ,…”

Section: Introductionmentioning

confidence: 96%

“…Previous studies revealed that CD sensitized TiO 2 nanohybrid can be fully used the visible light and the recombination of photocarriers can be effectively suppressed. Thus, resulting in significant improvement of the photocatalytic activity of the nanohybrid as CD facilitates in dispersion and stabilization of it ,. Thus, it is expected that the CD@TiO 2 based hyperbranched polymer nanocomposite will exhibit the excellent photocatalytic properties as well as wavelength dependent photluminescence properties.…”

Section: Introductionmentioning

confidence: 99%

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Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite

et al. 2018

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Functional materials with innovative optical features have attracted cumulative attention owing to their indispensable and inimitable roles in the advanced human‐civilization. Thus, in the present work, an excellent excitation wavelength dependent down‐ and up‐conversion photo‐luminescent carbon dot@TiO2 containing waterborne hyperbranched polyester nanocomposite was reported for the first time. Further, the thermosets of the nanocomposite were transparent and emitted different colors on exposure of different wavelengths of UV light. Most interestingly, the nanocomposite showed anti‐reflecting as well as self‐cleaning properties. The self‐cleaning behavior was achieved through photocatalytic degradation of different organic contaminants namely pesticide, phenol, bis‐phenol A and mixed dyes under normal sunlight. Further, the thermosetting nanocomposite can be used as an efficient photocatalyst for reduction of common nitro‐aromatic compound under normal sunlight. The nanocomposites also exhibited strong antibacterial activity against Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumoniae and Pseudomonas aeruginosa bacterial strains. Thus, the studied nanocomposite has remarkable prospect in different advanced applications.

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Section: Introductionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite

et al. 2018

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“…33 In brief, the required quantities of glycerol and citric acid were dissolved in distilled water. The calculated amount of cow urine was added into the above mixture placed in a 100 mL conical flask caped with a cotton plug.…”

Section: Preparation Of CDmentioning

confidence: 99%

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Hazarika

Karak

2016

Green Chem.

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In this study, environmentally friendly waterborne hyperbranched polyester/carbon dot (CD) nanocomposites were fabricated by in situ polymerization through a facile and greener route in absence of catalyst, solvent and neutralizing agent. Three nanocomposites were prepared at different loadings of CD (0.1, 0.5 and 1 wt %). CD was prepared from citric acid and glycerol in presence of cost free cow urine through a one step greener method. The structural attributes of the nanocomposites were evaluated by transmission electron microscopy, X-ray diffraction, Fourier transform infrared and UV-visible spectroscopic studies. The thermosets were obtained by curing the polyester nanocomposite with glycerol based hyperbranched epoxy and fatty acid based poly(amido amine) hardener. The nanocomposites exhibited excellent wavelength dependent down-and up-conversion fluorescence properties. The significant improvements in mechanical properties like tensile strength (7.8 -47 MPa), Young's modulus (243 -745 MPa), toughness (17.82 -51.1 MJm -3 ) and scratch hardness (4 -10 kg) were observed for the thermosetting nanocomposites. Thermogravimetrc analysis supports high thermostability (234 -265 °C) while differential scanning calorimetry authenticated glass transition temperature in the range of 49-56 °C. The rheological study demonstrated shear thining behaviour. The nanocomposite films exhibited good transparency in the visible range. Further, thermosetting nanocomposites were found to be highly biodegradable by Bacillus subtilis and Pseudomonas aeruginosa bacterial strains. The nanocomposite also possesses efficient self-cleaning ability as observed by photodegradation of formaldehyde (within 7 h) and methylene blue (80 min) under exposure of normal sunlight. Thus, this nanocomposite could be used as a promising eco-friendly material for advanced applications.

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“…Nanotechnology is an emerging and rapidly growing field owning to its prominent characters and outstanding applications in science and technology. In addition, due to their considerable diversified physic‐chemical attributes, (e. g. excellent surface effect, small size effect and macroscopic quantum tunneling effect, nanomaterials including carbon nanomaterials, semiconductor nanomaterials, polymeric nanomaterials, metal nanomaterials) resulted in an explosion for a broad range of innovative applications . In recent times, carbon dots, with sizes less than 10 nm, are recognized as new form of photoluminescent carbon nanomaterials family, which have attracted tremendous attentions due to the unique microstructure and optical properties.…”

Section: Introductionmentioning

confidence: 99%

A Facile, Effective Synthesis of Excellent Fluorescent Carbon Dots with Optical Properties

Shen

Wang

2019

ChemistrySelect

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Carbon dots (CDs) are new fluorescent materials which have been sparked intense research due to their excellent properties, such as ultraviolet (UV) absorption, good biocompatibility, low toxicity, facile synthesis, low cost and tunable photoluminescence. Therefore, CDs appear to be a promising nanomaterials in many fields of application. Here, high quality carbon dots (named a‐CDs, b‐CDs, c‐CDs) were synthesized through a mild, facile hydrothermal method without any further modification using different carbon precursors and surfactants. Through carefully comparing and analyzing the three as‐prepared CDs samples, the c‐CDs exhibited exceptional advantages including high fluorescence intensity and satisfactory chemical stability. Then, the structures, morphologies, optical properties were characterized by X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), UV–vis and fluorescence spectroscopic, Raman spectra and transmission electron microscope (TEM) in details. Our results verified that one‐step hydrothermal synthesis was a simple, efficient and green process for the preparation of carbon dots. The investigation on the unique characteristics can provide new recognition on the fluorescent carbon dots.

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Photocatalytic degradation of organic contaminants under solar light using carbon dot/titanium dioxide nanohybrid, obtained through a facile approach

Cited by 82 publications

References 40 publications

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

A Facile, Effective Synthesis of Excellent Fluorescent Carbon Dots with Optical Properties

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Photocatalytic degradation of organic contaminants under solar light using carbon dot/titanium dioxide nanohybrid, obtained through a facile approach

Cited by 82 publications

References 40 publications

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO2 Nanocomposite

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO2 Nanocomposite

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

A Facile, Effective Synthesis of Excellent Fluorescent Carbon Dots with Optical Properties

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Product

Resources

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Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO₂ Nanocomposite