Photocatalytic degradation of Brilliant Green dye using CdSe quantum dots hybridized with graphene oxide under sunlight irradiation

Thirugnanam, N.; Song, Huaibing; Wu, Yan

doi:10.1016/s1872-2067(17)62964-4

Cited by 80 publications

(29 citation statements)

References 60 publications

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“…In the past year a variety of different techniques have been developed for the removal of organic chemical and dye impurities from contaminated water such as chemical oxidation, solvent extraction, catalytic degradation, biodegradation, coagulation/flocculation, ozone treatment, membrane filtration, ion exchange, and adsorption . Currently many researchers had reported the use of TiO 2 , ZnO, Cu 2 O, SnO 2 , CdS, CdSe and WO 3 for the photocatalytic degradation of dye pollutants. But, these methods are generally harsh reaction conditions, required long reaction time as well as costlier.…”

Section: Introductionmentioning

confidence: 99%

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One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

et al. 2020

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We have developed a facile and efficient one-pot synthesis of nanocomposites of magnetic separable Graphene Polyaniline-Ferrite (G@PANI-Fe 3 O 4 ) and Graphene Polypyrrole-Ferrite (G@PPy-Fe 3 O 4 ) for the use of photocatalytic dye degradation of pollutants. This is the first attempt to synthesize PANI-Fe 3 O 4 and PPy-Fe 3 O 4 on graphene surface by a simple hydrothermal step, where PANI and PPy constructed nanocomposites with graphene and ferrite nanoparticles. The nitrogen-containing functional groups of PANI and PPy have provided more active sites on functionalized G@PANI-Fe 3 O 4 and G@PPy-Fe 3 O 4 nanocomposites for enhanced dye degradation capacity. The photocatalytic activity of as-prepared nanocomposites was investigated by the degradation of direct red 23. The effective degradation of direct red 23 up to 95.44% and 94.98% was observed by using the dose of 1 g/L G@PANI-Fe 3 O 4 and G@PPy-Fe 3 O 4 nanocomposite respectively, at pH 4 and contact time within 10 min only. The degradation capacity of G@PANI-Fe 3 O 4 and G@PPy-Fe 3 O 4 nanocomposite was superior in comparison with reported material and could be recycled at least 10 cycles. As-prepared nanocomposites were well characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Vibrating Sample Magnetometer (VSM) and Scanning Electron Microscope (SEM). The results demonstrated that the magnetically separable G@PANI-Fe 3 O 4 and G@PPy-Fe 3 O 4 nanocomposites are acting as an effective catalyst for dye degradation, which has effective recyclability property. The efficient dye degradation capacity of as-prepared nanomaterials could provide an innovative platform for different applications including the control of water pollution.

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Section: Introductionmentioning

confidence: 99%

“…But, these methods are generally harsh reaction conditions, required long reaction time as well as costlier. However, such photocatalysts also suffer from low degradation capacities and difficult separation techniques . These methods also used metals that are hazardous to the environment.…”

Section: Introductionmentioning

confidence: 99%

One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

et al. 2020

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“…These limitations can be overcome by coupling bismuth vanadate with graphene because it is an excellent 2D structured carbonaceous material with large‐surface area (2630 m 2 /g), high‐charge carriers motion (2 × 10 5 cm 2 /v), and a best medium for electron relocation . Many reduced graphene oxides‐based composites have been reported from which rGO loaded with BiVO 4 have gained much attention because of its excellent properties . The graphene oxide was converted into rGO by light induced carries of bismuth vanadate .…”

Section: Introductionmentioning

confidence: 99%

“…18 Many reduced graphene oxides-based composites have been reported from which rGO loaded with BiVO 4 have gained much attention because of its excellent properties. 21 The graphene oxide was converted into rGO by light induced carries of bismuth vanadate. [22][23][24] There are expectations that well-defined interfaces of composite of rGO/BiVO 4 can be used for best charge separation by ensuring the charge transfer at a time.…”

Section: Introductionmentioning

confidence: 99%

Insighting role of reduced graphene oxide in BiVO₄ nanoparticles for improved photocatalytic hydrogen evolution and dyes degradation

et al. 2019

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Summary Hydrogen energy production and dyes degradation have been considered the need of modern age of technology in globe irrespective of the level of science and research in that country. Hydrogen gas is a green energy fule for the future application and abunduntly available in environment. Various techniques are reported for the production of hydrogen energy among which photocatalysis method is envirnmental friendly, cost‐efficient method using water that also decontaminated from dyes, which is a main problem nowadays because of increase in industrial applications according to the living standards. The composite of Bismuth vanadate (BiVO4) with the coupling of the rduced graphene oxide (rGO) were synthezied by the facial hydrothermal technique by using a bismuth nitrate penta hydrate and amonium metavanadate as main precour and graphene oxide solution for reduced graphene oxide incorporation. X‐ray diffraction (XRD), Scanning Electron Microscope (SEM), ultraviolet adsorption spectroscopy (UV‐vis), and Brunauer‐Emmett‐Teller (BET) characterization tools investigate the role of concentration of the coupling material rGO in BiVO4. All characterization techniques confirms that 1.5% rGO/BiVO4 shows transformation of tetragonal to monoclinic phase with altration of the particles size (25‐40 nm), with high‐surface area, having irregular spherical porous clusters degradation of methelene blue (97%), production of green energy in the form of hydrogen gas fuel, and enhancement of the absorption of light that is clear intimation of the high photocatalytic efficiency towards the decontamination of the wastewater and production of hydrogen gas. Prepared nanostructured composite in current work reveals effective photocatalytic activity for decontamination of the wastewater and evolution of hydrogen energy would be the precise idea to utilize them in near future with various promising applications.

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“…The photocatalysis process is a useful method for removing resistant organic compounds from water that are difficult to remove by conventional methods, e.g., coagulation, sedimentation, and filtration [8][9][10]. The application of semiconductors as photocatalysts offers an environmentally friendly way of using solar energy to remove different organic compounds in the presence of various catalysts, such as TiO 2 [1,6,[11][12][13][14][15][16], ZnO [17,18], CdS [19,20], ZnS [21], Fe 2 O 3 [22][23][24], Cu 2 O [25], ZrO 2 [26], WO 3 [27,28], V 2 O 5 [29], and CdSe [30]. In the case of environmental analytical studies, TiO 2 has favorable semiconductor photocatalytic properties, due to its high photocatalytic activity upon irradiation with UV, high stability in a wide range of pH (modified and non-modified water samples), and low price [11], but its major drawback compared to other semiconductors is its relatively low (only 3-5%) utilization of solar light irradiation.…”

Section: Introductionmentioning

confidence: 99%

Application of Hierarchical Nanostructured WO3 and Fe2O3 Composites for Photodegradation of Surfactants in Water Samples

et al. 2019

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This study describes the utilization of hierarchical photoactive surface films for the decomposition of surfactants in water samples (with different pH). Photoactive films, containing tungsten (VI) oxide and iron (III) oxide (hematite), were deposited in a systematic and controlled manner using a layer-by-layer method. Physicochemical properties of the photoactive materials were developed and characterized using XRD analysis, Raman spectroscopy, water contact angle, voltammetry, and microscopic (SEM) techniques. The resulting multilayer films showed attractive performances in the photodegradation of the anionic surfactant sodium dodecyl sulfate (SDS) and the nonionic surfactant (1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol (Triton™ X-144) under solar light irradiation. The efficiency of the surfactants’ photodegradation was evaluated with a “test” based on a method, which is extremely sensitive to surfactants’ interference, with trace analysis of Pb using anodic stripping voltammetry on mercury electrodes (recovery study). The usefulness of hierarchical photoactive systems in the photodegradation of both surfactants is demonstrated in the presence and absence of the applied bias voltage. The maximum decomposition times were 2–3 h and 30 min, respectively. Furthermore, a properly designed layer system may be proposed, matching the pH of the water sample (depending on the treatment on the sampling side).

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Photocatalytic degradation of Brilliant Green dye using CdSe quantum dots hybridized with graphene oxide under sunlight irradiation

Cited by 80 publications

References 60 publications

One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

Insighting role of reduced graphene oxide in BiVO₄ nanoparticles for improved photocatalytic hydrogen evolution and dyes degradation

Application of Hierarchical Nanostructured WO3 and Fe2O3 Composites for Photodegradation of Surfactants in Water Samples

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Photocatalytic degradation of Brilliant Green dye using CdSe quantum dots hybridized with graphene oxide under sunlight irradiation

Cited by 80 publications

References 60 publications

One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation

Insighting role of reduced graphene oxide in BiVO4 nanoparticles for improved photocatalytic hydrogen evolution and dyes degradation

Application of Hierarchical Nanostructured WO3 and Fe2O3 Composites for Photodegradation of Surfactants in Water Samples

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Insighting role of reduced graphene oxide in BiVO₄ nanoparticles for improved photocatalytic hydrogen evolution and dyes degradation