Nanocrystalline immobilised ZnO photocatalyst for degradation of benzoic acid and methyl blue dye

Suryavanshi, R.D.; Mohite, S.V.; Bagade, A.A.; Shaikh, Shahin; Thorat, J. B.; Rajpure, K.Y.

doi:10.1016/j.materresbull.2018.01.042

Cited by 50 publications

(17 citation statements)

References 38 publications

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“…Fan et al 5 al. 33 prepared ZnO thin films on glass and FTO coated glass substrates by spray pyrolysis and evaluated the efficiency of these electrodes for PEC degradation of of benzoic acid (BA) and methyl blue (MB) dye under UV radiation. The results of this study showed 65.7% degradation of BA and 98.1% of MB within 400 min and 120 min, respectively.…”

Section: 2investigation Of Pec Efficiency Of Zno Nanorodsmentioning

confidence: 99%

“…When the potential is applied a reduction of the recombination the photo-generated electron-hole pairs occurs and consequently an increase of the PC efficiency is obtained. 28,29 Nevertheless, at the best of our knowledge, only a few studies are found in the literature using ZnO nanostructures as a photoanode for PEC, including the studies of Hunge et al 6 , Han et al 30 , Liu et al 31 , Lin et al 32 , Suryavanshi et al 33 , and Sarwar et al 34 These employ nanostructured ZnO as photoanodes for PEC. In addition, only the work of Han et al 30 used ZnO synthesized by CBD as a photoanode for PEC applications.…”

Section: Introductionmentioning

confidence: 99%

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Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

Rosa

Cavalcante

Silva

et al. 2020

j nanosci nanotechnol

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ZnO nanorods were grown on silicon (Si) substrates by two techniques: (i) Chemical Bath Deposition (CBD) and (ii) a CBD seed layer combined with Carbothermal Reduction Vapor Phase Transport (CTR-VPT). The structured ZnO nanorods were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and contact angle measurments. The photoelectrochemical property of ZnO nanorods were analyzed by linear voltammetry under UV-ABC light excitation. Using the ZnO nanorod samples as photoanodes, the removal of methylene blue (MB) as a representative organic compound was studied by the photoelectrocatalytic (PEC) technique applying a potential (E) of 0.6 V. For comparison purposes, experiments were performed under the same conditions using photocatalysis (PC), direct photolysis and using samples of pure Si (support material) as working electrodes in PEC. XRD analyses of ZnO prepared by both methods showed the expected ZnO wurtzite phase and a preferred c-axial orientation in the growth of the nanorods. The presence of ZnO was further confirmed by XPS and contact angle measurements showed that ZnO grown by CBD (ZnO/CBD) had a slightly hydrophobic behavior while ZnO grown by CTR-VPT (ZnO/CTR-VPT) is hydrophilic. Both ZnO sample types were shown to be photoactive, 3 with ZnO/CBD showing higher resultant photocurrent compared to ZnO/CTR-VPT. For the degradation of MB 53% of the compound was removed using ZnO/CBD as a working electrode, while using the ZnO/CTR-VPT electrode led to a removal of 43% of MB. However, direct photolysis alone removed 39% of the MB. The lower removal of MB using ZnO/CTR-VPT samples was related to surface dissociation during the degradation process. The results show that ZnO nanorods prepared by the CBD techique are a promising photoelectrode for PEC applications. Our data also indicate that CTR-VPTgrown nanorods produce uniform nanorod arrays, but this uniform nanostructure deposit does not lead to any increase in PEC activity.

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Section: 2investigation Of Pec Efficiency Of Zno Nanorodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

Rosa

Cavalcante

Silva

et al. 2020

j nanosci nanotechnol

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“…[1][2][3] From the various industrial water pollutants, the organic dyes are the most widespread class of pollutants and are frequently released by textile and paper industries. [3][4][5][6] Protection of water bodies from such organic contaminants is the greatest challenge of twenty-first century for environmentalists and researchers. Methyl orange (MO) is the most common dye of textile industries and has extraordinary potential to cause severe health problems.…”

Section: Introductionmentioning

confidence: 99%

<p>Bio Framework-Derived Facile MoO3-NiO-PdO-Pd Nanomaterial for Detoxification of Organic Pollutants</p>

Shaheen

Ahmad

Ali

et al. 2020

IJN

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Introduction: The catalytic behavior of metal oxide nanomaterials for removal of organic pollutants under dark ambient conditions, without any additional stimulant, is of great interest among the scientific community. Methods: In this account, a nanomaterial of ternary metal oxides (MoO 3-NiO-PdO-Pd) was synthesized via greener approach and was explored for degradation of methyl orange in water environment in dark ambient conditions in comparison with light conditions. The biochemical species of Abies pindrow were treated with aqueous solution of precursor's salt following sol gel synthesis strategy. We further attuned morphology and chemistry of MoO 3-NiO-PdO-Pd by incorporating bioactive compounds of A. pindrow. Result and Discussion: The bio-fabricated MoO 3-NiO-PdO-Pd revealed outstanding catalytic behavior with 92% degradation of methyl orange within 15 min in the dark at ambient temperature and pressure. Whereas, in the presence of visible light irritation, the catalyst degraded 97% of methyl orange in 15 min. According to the reaction kinetics of degradation, the catalysts illustrated good stability in light (R 2 =0.93) as well as in dark conditions (R 2 =0.98). Furthermore, the outstanding reusability and recyclability of the synthesized nanomaterial was observed for four runs of the experiment under dark and light conditions. Conclusion: Therefore, A. pindrow-synthesized MoO 3-NiO-PdO-Pd nanocatalyst demonstrated significant potential for detoxification of organic pollutants for water remediation.

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“…With the aid of ultraviolet (UV) light, the photogenerated electrons (e − ) and holes (h + ) in ZnO semiconductor can react with O 2 , OH − , and H 2 O to produce active species such as • O 2− and • OH. Organic pollutants in wastewater are eventually oxidized by these active species into small nontoxic organic compounds or inorganic substances such as H 2 O and CO 2 , thereby reducing pollution in the water environment.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping

Luo

et al. 2019

Physica Status Solidi (a)

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ZnO, Fe 0.01 ZnO, Sn 0.05 ZnO, and Fe 0.01 Sn 0.01 ZnO photocatalysts are prepared by a simple low-temperature solution method using Zn(NO 3 ) 2 , Fe(NO 3 ) 3 , SnCl 4 , and NaOH as raw materials. X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller surface area analysis, X-ray photoelectron spectroscopy, ultraviolet-visible diffusion spectroscopy, and photoluminescence spectroscopy are performed to characterize the products. All doped ZnO samples exhibit enhanced photocatalytic activity compared with undoped ZnO toward methylene blue (MB) degradation. In particular, Sn 0.05 ZnO shows excellent performance among the doped samples. The degradation rate of MB by Sn 0.05 ZnO reaches 99.61% after 120 min of illumination, which is approximately 2.2 times as high as that by undoped ZnO (45.88%). A comparison of the photocatalytic activity of the samples reveals the effects of Fe 3þ and Sn 4þ doping on the photocatalytic performance of ZnO on the basis of the following aspects: formation of impurity level, particle size, and pore structure of catalyst, microstructural changes in the crystal, and action of doped ions.

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Nanocrystalline immobilised ZnO photocatalyst for degradation of benzoic acid and methyl blue dye

Cited by 50 publications

References 38 publications

Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

<p>Bio Framework-Derived Facile MoO3-NiO-PdO-Pd Nanomaterial for Detoxification of Organic Pollutants</p>

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping

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Nanocrystalline immobilised ZnO photocatalyst for degradation of benzoic acid and methyl blue dye

Cited by 50 publications

References 38 publications

Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

Photoelectrocatalytic Degradation of Methylene Blue Using ZnO Nanorods Fabricated on Silicon Substrates

<p>Bio Framework-Derived Facile MoO3-NiO-PdO-Pd Nanomaterial for Detoxification of Organic Pollutants</p>

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe3+ and Sn4+ Doping

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Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping