One-pot synthesis of covalently functionalized reduced graphene oxide–polyaniline nanocomposite for supercapacitor applications

Arjun, Nadarajan; Uma, Kasimayan; Pan, Guan‐Ting; Yang, Thomas C.-K.; Sharmila, Ganapathi

doi:10.1007/s10098-018-1573-8

Cited by 12 publications

(2 citation statements)

References 58 publications

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“…rGO (Figure 1c) consists of inhomogeneous particles formed by sheets that pack very close together, with different diameters (ca. 1 μm to 5 μm), similar to what has been observed in other works [29]. The MoS2 was previously delaminated by ultrasound treatment in aqueous solution (Figure 1d).…”

Section: Characterization Of the Photocatalystssupporting

confidence: 88%

Photodegradation of Ciprofloxacin and Levofloxacin by Au@ZnONPs-MoS2-rGO Nanocomposites

Machín¹,

Soto-Vázquez²,

García³

et al. 2023

Preprint

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November 15th, 2022 was selected as the day where the human population reached the 8 billion mark [1]. This new reality will force the governments around the world to find ways to sustainably produce and secure food, water, and energy for their countries [2-4]. In terms of water, its quality and availability has been a matter of great concern in recent decades [5], especially with the emergence of new organic and inorganic pollutants [6]. Among organic contaminants, the detection of trace amounts of fluoroquinolone antibiotics, such as ciprofloxacin (CFX) and levofloxacin (LFX), in natural water bodies, has been of great concern in the scientific community [7,8]. Some of the side effects of the consumption of these antibiotics are nausea, diarrhea, abdominal pain, rash, low sugar levels, and antibiotic resistance to bacterial infections, among others [9,10]. It was estimated that in 2019 more than 1.27 million people died due to antibiotic-resistant bacterial infections [11], and this number is expected to rise to 10 million by 2050, if the trend continues [12]. Because of this, new ways to degrade antibiotics from water have been developed over the years. A method that has been implemented for some time is the use of photocatalysts for the degradation of these compounds in water [13]. Semiconductors such as titanium oxide (TiO2), zinc oxide (ZnO), zinc sulfide (ZnS), cadmium sulfide (CdS), strontium peroxide (SnO2), or tungsten trioxide (WO3), among others, are commonly used in photocatalytic processes [14-16]. Zinc oxide has been widely used due to its low cost and stability in aqueous solution, easy production, and because it is an environmentally friendly material [17,18]. It has been identified that some of the disadvantages of ZnO as photocatalyst are photocorrosion, recombination of electron-hole pairs, fast backward reactions, and inability to use visible light [18]. Multiple approaches have been implemented over the years to reduce these limitations. One of them is the use of noble metals such as platinum (Pt), gold (Au), or even silver (Ag) as cocatalysts [15-17,19]. These metals can increase the photocatalytic activity by reducing the recombination of electron-hole pairs, as well allowing the use of visible light [20]. For example, Quin and coworkers [21] prepared a bio-inspired hierarchical assembly of carbonized spinach leaves@Au/ZnO for the degradation of CFX under visible light. The results showed a degradation of 61% of the antibiotic in a period of 180 minutes. Chankhanittha et al. [22] developed different Ag@ZnO composites for the complete degradation of red dye and ofloxacin antibiotic in 25 and 80 minutes, respectively. The researchers attributed the improved photoactivity to the high electron-hole separation efficiency at the photocatalyst interface, as well as the creation of the Schottky barrier at the silver-zinc oxide interface.

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Section: Characterization Of the Photocatalystssupporting

confidence: 88%

Photodegradation of Ciprofloxacin and Levofloxacin by Au@ZnONPs-MoS2-rGO Nanocomposites

Machín¹,

Soto-Vázquez²,

García³

et al. 2023

Preprint

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show abstract

“…Figure 6 shows the comparison of the Raman spectrum of the studied sample before and after adsorption. According to the shape of the spectrum after adsorption, it shows changes in the intensity ratio of ID/IG, which decreased from 0.96 to 0.84 (Arjun et al, 2018). This value shows the change in the electron states of graphene oxide in the adsorption process.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 93%

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Salami,

Bahram,

Farhadi

et al. 2024

J Polym Environ

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In the present study, a novel four-component flexible film based on α-ketoglutaric acid, chitosan, polyaniline, and graphene oxide (α-CTS-PANI-GO) was synthesized and characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and Raman spectroscopy. The simultaneous removal properties of α-CTS-PANI-GO were evaluated in the removal of cationic and anionic dyes, Methylene Blue (MB) and Acid Orange 7 (AO7). Using the Central Composite Decomposition (CCD), the effect of different variables such as pH, temperature, adsorbent dose, and time on AO7 and MB removal was studied. Various isotherm models, such as Langmuir and Freundlich, were investigated, and the processing of experimental equilibrium data confirmed the suitability and application of the Langmuir model. Analysis of experimental adsorption data using various kinetic models, such as quasi-first and second-order models, shows the applicability of the firstorder equation. The results showed that in the optimal conditions, the removal percentage was about 95% for AO7 and 80% for MB, which indicates the successful performance of the synthetic film compared to the method.

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Evolution of electrochemical properties of polyaniline doped by graphene oxide

et al. 2021

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One-pot synthesis of covalently functionalized reduced graphene oxide–polyaniline nanocomposite for supercapacitor applications

Cited by 12 publications

References 58 publications

Photodegradation of Ciprofloxacin and Levofloxacin by Au@ZnONPs-MoS2-rGO Nanocomposites

Photodegradation of Ciprofloxacin and Levofloxacin by Au@ZnONPs-MoS2-rGO Nanocomposites

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Evolution of electrochemical properties of polyaniline doped by graphene oxide

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