Ag–Co oxides nanoparticles supported on carbon nanotubes as an effective catalyst for the photodegradation of Congo red dye in aqueous medium

Zada, Noor; Khan, Idrees; Shah, Tariq; Gul, Tamanna; Khan, Nasib; Saeed, Khalid

doi:10.1080/24701556.2020.1713159

Cited by 17 publications

(15 citation statements)

References 37 publications

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“…A uniform, stable, highly ordered and controllable nanoparticle film can be prepared by self-assembly method [26], which can improve the reproducibility and sensitivity of SERS detection. A previous study reported that the annealed Ag-Zr film deposited on polyimide (PI) can produce a new type of particle/film structure [27], which is significantly different from the traditional granular film [28][29][30][31]. Considering that the Ag nanoparticles spontaneously formed on the surface of the annealed Ag-Zr alloy films and the nanophase effects in copper alloys [27,[32][33][34][35][36][37], we attempt to selfgrown Ag nanoparticles with different morphologies on the surface of the deposited Mo-Ag alloy films by adjusting the Ag content at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Lian

Sun

et al. 2020

Nanotechnology Reviews

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Ag nanoparticles/Mo–Ag alloy films with different Ag contents were prepared on polyimide by magnetron sputtering. The effects of Ag contents on the microstructure of self-grown Ag nanoparticles/Mo–Ag alloy films were investigated using XRD, FESEM, EDS and TEM. The Ag content plays an important role in the size and number of uniformly distributed Ag nanoparticles spontaneously formed on the Mo–Ag alloy film surface, and the morphology of the self-grown Ag nanoparticles has changed significantly. Additionally, it is worth noting that the Ag nanoparticles/Mo–Ag alloy films covered by a thin Ag film exhibits highly sensitive surface-enhanced Raman scattering (SERS) performance. The electric field distributions were calculated using finite-difference time-domain analysis to further prove that the SERS enhancement of the films is mainly determined by “hot spots” in the interparticle gap between Ag nanoparticles. The detection limit of the Ag film/Ag nanoparticles/Mo–Ag alloy film for Rhodamine 6G probe molecules was 5 × 10−14 mol/L. Therefore, the novel type of the Ag film/Ag nanoparticles/Mo–Ag alloy film can be used as an ideal SERS-active substrate for low-cost and large-scale production.

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Section: Introductionmentioning

confidence: 99%

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Lian

Sun

et al. 2020

Nanotechnology Reviews

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“…It helps in the generation of protons and hydroxyl radicals that play important roles in the oxidation and reduction process of holes and electrons, respectively. 49 The effect of pH media on the degradation of methylene blue were evaluated at different pH values (3, 5, 6. 5, 9, and 11), and the results are shown in Figure 9 .…”

Section: Resultsmentioning

confidence: 99%

“…The pH of organic contaminants is very important in the photocatalytic degradation process. It helps in the generation of protons and hydroxyl radicals that play important roles in the oxidation and reduction process of holes and electrons, respectively . The effect of pH media on the degradation of methylene blue were evaluated at different pH values (3, 5, 6.…”

Section: Resultsmentioning

confidence: 99%

Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

2020

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Bis(morpholinyl-4-carbodithioato)-platinum(II) was synthesized and characterized using spectroscopic techniques and single-crystal X-ray crystallography. The Pt(II) complex crystallized in a monoclinic space group P 2 1 / n with a Pt(II) ion located on an inversion center coordinated two morpholinyl dithiocarbamate ligands that are coplanar to form a slightly distorted square planar geometry around the Pt(II) ion. The complex was thermolyzed at 120, 180, and 240 °C to prepare PtS 2 nanoparticles. Powder X-ray diffraction patterns confirmed the hexagonal crystalline phase for the as-prepared PtS 2 nanoparticles irrespective of thermolysis temperature. Bead-like shaped PtS 2 - 120 nanoparticles with a particle size in the range of 12.46–64.97 nm were formed at 120 °C, while PtS 2 - 180 prepared at 180 °C is quasi-spherical in shape with particles in the range of 24.30–46.87 nm. The PtS 2 - 240 obtained at 240 °C is spherical with particles in the range of 11.45–46.85 nm. The broad emission maxima of the as-prepared PtS 2 nanoparticles are ascribed to the particles’ broad size distributions. The photocatalytic degradation of methylene blue by the PtS 2 nanoparticles shows a maximum efficiency of 87% for PtS 2 - 240 after 360 min. The effects of photocatalytic dosage, irradiation time, pH medium, and scavengers were also evaluated. Cyclic voltammetry of the PtS 2 nanoparticles showed a reversible redox reaction, while the electrochemistry of the as-prepared PtS 2 indicates that the electron transfer process is diffusion-controlled.

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“…Consequently, water purification is seen as a hot topic for research, which promotes scientific interest in it. [41,42,186] In water various types of pollutants are present. If we look inside the organic pollutant it again possesses enormous compounds but here we are focusing on degradation of dyes and nitrophenol as it disturb aquatic life and possess various toxic effects.…”

Section: Catalytic Degradation Of Organic Pollutantsmentioning

confidence: 99%

“…[36,37,186] The decomposition of organic pollutants is challenging due to their large size, complex structures, and nonbiodegradable nature. [36,41] To remove this organic pollutant conventional techniques like precipitation, filtration, ion exchange, and adsorption are used but they possess some limitations insufficient, need long reaction time, are non-destructive and convert the organic pollutant into another contaminants which is non-biodegradable and further need to be treated [37,41]. To overcome this limitation nanoparticles are used as a catalyst to remove organic pollutants as their effectiveness, ease of use, nonselective oxidation, low cost, full mineralization, and destruction of synthetic organic contaminants provide benefits over other conventional approaches as shown in the Figure 9.…”

Section: Catalytic Degradation Of Organic Pollutantsmentioning

confidence: 99%

Ag‐Based Bimetallic Nanoparticles for the Catalytic Reduction of Nitrophenol and Organic Dyes: An Overview

Bhatu,

Mavlankar,

Baviskar

et al. 2024

ChemistrySelect

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Bimetallic nanoparticles with synergistic effects revealed much higher catalytic activity than respective monometallic materials. This review describes bimetallic nanoparticles, especially silver nanoparticles, combined with the other transition elements, such as Ag−Fe, Ag−Co, Ag−Ni, and Ag−Cu, as an enhanced catalytically active material. The coverage is given to the various methods of preparation, in which factors responsible for different structures of bimetallic nanoparticles are thoroughly discussed. Lastly, we explore the use of bimetallic nanoparticles as a catalyst for the degradation of numerous organic pollutants that contribute to water pollution.

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Ag–Co oxides nanoparticles supported on carbon nanotubes as an effective catalyst for the photodegradation of Congo red dye in aqueous medium

Cited by 17 publications

References 37 publications

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

Ag‐Based Bimetallic Nanoparticles for the Catalytic Reduction of Nitrophenol and Organic Dyes: An Overview

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