Self-assembly of the Ag deposited ZnO/carbon nanospheres: A resourceful photocatalyst for efficient photocatalytic degradation of methylene blue dye in water

Singhal, Sonal; Dixit, Saurabh; Shukla, Anupam

doi:10.1016/j.apt.2018.09.031

Cited by 33 publications

(17 citation statements)

References 38 publications

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“…ZnO has low cost and it can be applicable in wide temperature range, so it has been extensively used in environmental treatment [15]. However, ZnO nanoparticles have some drawbacks, such as ununiformed dispersion, high resistivity, difficulty in fixing, and the facile combination of photogenerated electron-hole pairs [16].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of ZnO-GO Composites for the Photocatalytic Degradation of Methylene Blue

Lin

Hong

Chen

et al. 2020

Journal of Nanomaterials

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Beneficial from the excellent optical performance of zinc oxide (ZnO) nanocrystals and the absorption properties of graphene oxide (GO), the nanocomposites of ZnO and GO with synergistic photocatalytic effects were prepared by a precipitation method, in which GO is utilized as the catalyst carrier. The prepared composites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy and also performed photocatalytic activity for the nanocomposites. The results show that ZnO is uniformly loaded on the surface of GO assisted by an effective interface coupling. Due to interface coupling between ZnO and GO, electrons can be directly transferred from the valence band of ZnO to GO. The photodegradation efficiency of the composites reaches to 97.6%, and the first-order reaction rate constant of photodegradation is calculated to be 0.04401 min-1. The novel ZnO-GO composites with excellent photocatalytic performance display promising potential applications in the field of photocatalysis and will provide a new platform for building next-generation graphene-based semiconductor composites.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of ZnO-GO Composites for the Photocatalytic Degradation of Methylene Blue

Lin

Hong

Chen

et al. 2020

Journal of Nanomaterials

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“…To be precise, doping contributes in three ways: (i) narrowing band gap and promoting adsorption, (ii) improving conductivity of ZnO and mobility of charge carriers and (iii) altering the conduction band (CB) position and valence band (VB) of ZnO. Doping with other element in ZnO semiconductors has attracted attention of many researchers due to the higher amount of charge trap, hence reducing bulk recombination, as well as separating photogenerated electrons and holes more efficiently [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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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“…Photochemical sewerage treatments have been organized using photocatalyst such as metal oxides (TiO 2 [10], ZnO [11,12]), sulfides [13], and oxynitrides [14] because of its inexpensive, well organized and their stability. ZnO has been used widely in environmental treatments has it can be used in broad temperature range [15][16][17][18]. ZnO also has some drawbacks such as un-uniformed dispersal, difficult to fix, and it can be easily recombine the photogenerated electron-hole pairs [19].…”

Section: Introductionmentioning

confidence: 99%

Developing the NiO/CuTiO3/ZnO Ternary Semiconductor Heterojunction for Harnessing Photocatalytic Activity of Reactive Dye with Enhanced Durability

Divya¹,

Sivakumar²,

Sakthi³

et al. 2021

J Inorg Organomet Polym

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Solar active ternary NiO/CuTiO 3 /ZnO semiconductor heterojunction were developed by alcoholic dispersion technique. As prepared ternary system and parent photocatalysts were analyze crystalline phase, surface morphology, light absorbance property, electron hole accusation parting and significant functional groups by means of specific physicochemical feature measurements. From the results, enhanced visible light photo mineralization, superior efficiency of charge carriers separation and better photocatalytic degradation of reactive orange 30 were confirmed for ternary NiO/CuTiO 3 /ZnO semiconductor heterojunction. Hydroxyl radical in the radical trapping experiments confirmed the photocatalytic degradation, which plays an important role in removal of hazardous dye from industrial effluents. This work demonstrates that synergetic effect of CuTiO 3 and NiO in which it proves to be a good option for recovering the consumption of visible light of ZnO-based materials in the ternary hybrid conduction bands.

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Self-assembly of the Ag deposited ZnO/carbon nanospheres: A resourceful photocatalyst for efficient photocatalytic degradation of methylene blue dye in water

Cited by 33 publications

References 38 publications

Green Synthesis of ZnO-GO Composites for the Photocatalytic Degradation of Methylene Blue

Green Synthesis of ZnO-GO Composites for the Photocatalytic Degradation of Methylene Blue

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

Developing the NiO/CuTiO3/ZnO Ternary Semiconductor Heterojunction for Harnessing Photocatalytic Activity of Reactive Dye with Enhanced Durability

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