New and highly efficient Ag doped ZnO visible nano photocatalyst for removing of methylene blue

Kakhki, Roya Mohammadzadeh; Tayebee, Reza; Ahsani, Fatemeh

doi:10.1007/s10854-016-6268-5

Cited by 61 publications

(19 citation statements)

References 65 publications

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“…open sci. 7: 191590 reported by Mohammadzadeh et al and Goswami & Sahai [32,33]. In fact, the impurities for peak intensity for Ag metal increased as the stoichiometry increased at peak position (111).…”

Section: Phase Studiesmentioning

confidence: 83%

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Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

et al. 2020

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Ag and Ni/ZnO photocatalyst nanostructures were successfully synthesized by a sol–gel method. In this work, the photocatalyst sample was systematically studied based on several factors affecting the performance of photocatalyst, which are size, morphology, band gap, textural properties and the number of active sites presence on the surface of the nanocatalyst. X-ray diffraction revealed that Ag/ZnO nanomaterials experienced multiple phases, meanwhile for Ni/ZnO the phase of nanomaterials were pure and single phase for stoichiometry less than 5%. Field emission scanning electron microscope (FESEM) showed almost all of the synthesized nanomaterials possessed a mixture of nanorods and spherical-like shape morphology. The Ag/ZnO showed high photocatalytic activity, producing at least 14th trials of nanocatalyst reusability on degradation of methyl orange under UV irradiation. Interestingly, this phenomenon was not observed in larger surface area of Ni/ZnO nanomaterials which supposedly favour photocatalytic activity, but instead producing poor photocatalytic performance. The main reasons were studied and exposed by temperature-programmed desorption of carbon dioxide (TPD–CO 2 ) which showed that incorporation of Ag into ZnO lattice has enhanced the number of active sites on the surface of the nanocatalyst. Whereas incorporation of Ni in ZnO has lowered the number of active sites with respect to undoped ZnO. Active sites measurement is effective and significant, providing opportunities in developing an intensive study as an additional factor.

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Section: Phase Studiesmentioning

confidence: 83%

“…Although the XRD peak position did not exhibit any changes, some alteration was noted for peak intensity and width. In this case, introduction of Ag/Ni did not move the peak to a lower position, as [32,33]. In fact, the impurities for peak intensity for Ag metal increased as the stoichiometry increased at peak position (111).…”

Section: Photocatalytic Activitymentioning

confidence: 86%

Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

et al. 2020

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“…Therefore, using Ag would be more eco-friendly and easier to apply in the industry. 32–38 The deposited Ag nanoparticles (Ag NPs) on the photocatalyst surface can effectively suppress the recombination of photogenerated electron–hole pairs due to the Schottky barrier formed at the interface between the metal and semiconductor. Moreover, surface plasmon resonance (SPR) of Ag NPs significantly improves the absorption of visible light.…”

Section: Introductionmentioning

confidence: 99%

Efficient photocatalytic degradation of dyes using photo-deposited Ag nanoparticles on ZnO structures: simple morphological control of ZnO

et al. 2021

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“…Evidently, these methods cannot yet adequately eliminate toxic coloured constituents and their environmental impacts. Moreover, the existing chemical and biological methods are frequently expensive and demonstrate limited efficiency . The advantages of heterogeneous photocatalytic techniques that make them superior to traditional methods include the removal of pollutants in the range of ppb, avoidance of production of polycyclic compounds and reduction of the cost of the afferent procedures …”

Section: Introductionmentioning

confidence: 99%

A robust UV–visible light‐driven SBA‐15‐PS/phthalhydrazide nanohybrid material with enhanced photocatalytic activity in the photodegradation of methyl orange

Tayebee

Kakhki

Audebert

et al. 2018

Applied Organom Chemis

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SBA‐15‐PS/phthalhydrazide (PHD) is presented as a new heterogeneous inorganic–organic nanohybrid photocatalyst with high stability, superior recyclability and remarkable performance in the degradation of methyl orange (MO). Distinctive parameters, including photocatalyst and dye concentrations, pH and degradation time, were assessed for MO degradation catalysed by SBA‐15‐PS/PHD. This new heterogeneous nanocatalyst was characterized using Fourier transform infrared and UV–visible spectroscopies, thermogravimetric analysis, scanning and transmission electron microscopies and elemental analysis. Photodegradation of MO of up to 92% under the optimum conditions (photocatalyst = 0.015 g, [MO] = 4 ppm, pH = 2) was accomplished in 25 min using SBA‐15‐PS/PHD. A preliminary kinetic investigation was performed, and pseudo‐first‐order kinetics with a high rate constant (0.068 min−1) was found for MO degradation. Additional results showed that the photodegradation of MO was increased in the presence of hole scavengers. Therefore a photoreduction mechanism for MO degradation is proposed.

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New and highly efficient Ag doped ZnO visible nano photocatalyst for removing of methylene blue

Cited by 61 publications

References 65 publications

Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

Efficient photocatalytic degradation of dyes using photo-deposited Ag nanoparticles on ZnO structures: simple morphological control of ZnO

A robust UV–visible light‐driven SBA‐15‐PS/phthalhydrazide nanohybrid material with enhanced photocatalytic activity in the photodegradation of methyl orange

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