Photodegradation of orange II dye using p-n junction NiO/TiO2 composite, and assessment of its biological activities

Gul, Tamanna; Ahmad, Shujaat; Khan, Idrees; Khan, Ibrahim; Almehmadi, Mazen; Alsaiari, Ahad Amer; Allahyani, Mamdouh; Saeed, Khalid

doi:10.1016/j.jscs.2023.101654

Cited by 11 publications

(5 citation statements)

References 57 publications

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“…26 The crystalline structures of the TiO 2 composite are demonstrated to closely match with that of a tetragonal geometry (JCPDS File, no. 21-1272), 20 whereas the XRD spectrum of the nanofiber composite NiO@TiO 2 has additional peaks that are observed at 37.2, 44.0, 62.8, and 74.4°, which correspond to the crystalline planes of (111), ( 200), (220), and (311), respectively, which are the characteristic diffraction peaks for the crystal plane on the cubic phase of NiO (JCPDS, no. 47-1049).…”

Section: Morphology and Structuralmentioning

confidence: 99%

“…One of the most common strategies to improve the conductivity is doping or making a composite with some other TMs like Ni. 19 Composites of NiO and TiO 2 have been studied extensively for various applications such as for the photodegradation of dye, 20 as electrochromic materials, 21 for rechargeable lithium ion batteries, 22 and as electrochemical gas sensors. 23−25 Wang et al reported that a NiO/TiO 2 -based p−n heterojunction structure serves as an efficient photocatalyst for hydrogen production from a methanol−water mixture.…”

Section: Introductionmentioning

confidence: 99%

“…Composites of NiO and TiO 2 have been studied extensively for various applications such as for the photodegradation of dye, as electrochromic materials, for rechargeable lithium ion batteries, and as electrochemical gas sensors. − Wang et al reported that a NiO/TiO 2 -based p–n heterojunction structure serves as an efficient photocatalyst for hydrogen production from a methanol–water mixture . Furthermore, Li et al demonstrated that mesoporous NiO/TiO 2 composite nanofibers have increased H 2 -production activity using methanol as a scavenger .…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Haile,

Cobet,

Ulbricht

et al. 2024

J. Phys. Chem. C

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Nowadays, hydrogen fuel is becoming more popular, and it is attracting significant attention as a sustainable and environmentally benign energy source owing to its zero emission of harmful substances and high energy density. Hydrogen generation through the electrocatalytic hydrogen evolution reaction (HER) employs economically inexpensive and selfsupported electrocatalysts that hold immense potential to provide a sustainable and cost-effective fuel in the future energy scenario. A self-supported NiO@TiO 2 nanofiber composite on Ti-foil is synthesized via a hydrothermal approach, and it is used as an electrocatalyst in the HER under alkaline conditions. The surface morphology, crystalline structure, and chemical composition of the electrode are analyzed by using high-resolution scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, which confirms that NiO nanoparticles are anchored to the surface of TiO 2 nanofibers. Investigation of the electrocatalytic properties of the NiO@TiO 2 nanofiber composite in a 1 M KOH electrolyte solution for the HER showed an overpotential of 144 mV at 10 mA cm −2 with a Tafel slope of 152.34 mV dec −1 . The NiO that is anchored to the TiO 2 nanofibers creates more catalytically active sites, which increases the surface area and enhances the HER performance. The charge transfer resistance of R ct = 41.6 Ω is determined from the electrode kinetics analyzed by using an electrochemical impedance spectroscopy Nyquist plot. The chronopotentiometric stability test confirms that the NiO@TiO 2 composite electrode shows a robust production of H 2 gas with only 7.6% potential deviation after 12 h of electrocatalytic activity. Furthermore, a Faradaic efficiency of 86% for hydrogen is achieved after 100 min of the HER. The results confirm that the NiO@TiO 2 nanofiber composite is a promising candidate material for the electrocatalysis of the HER.

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Section: Morphology and Structuralmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Haile,

Cobet,

Ulbricht

et al. 2024

J. Phys. Chem. C

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“…High catalytic activity, a large surface area, and an accessible mass transport pathway of a microporous network are the anticipated features of hierarchically porous Ni-NiO/C/g-C 3 N 4 networks. Therefore, synthesizing a ternary composite of NiO with carbon (C) and C 3 N 4 without additional chemical treatment could be an environmentally friendly way to develop a new catalyst [ 32 ]. Further, NiO on carbonaceous support could prevent the potential agglomeration of NiO and subsequently would gain conducive ground for the maximum utilization of catalytic properties ascending from the surface [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Integrated Ozonation Ni-NiO/Carbon/g-C3N4 Nanocomposite-Mediated Catalytic Decomposition of Organic Contaminants in Wastewater under Visible Light

Alhato,

Kumar,

Barakat

2024

Nanomaterials

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Developing a hybrid process for wastewater purification is of utmost importance to make conventional methods more efficient and faster. Herein, an effective visible light-active nickel–nickel oxide/carbon/graphitic carbon nitride (Ni-NiO/C/g-C3N4)-based nanocatalyst was developed. A hybrid process based on ozonation and Ni-NiO/C/g-C3N4 visible light photocatalysis was applied to decolourize the Congo red (CR), Alizarin Red S (ARS), and real dairy industry wastewater. The synthesized catalyst was characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Χ-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectrophotometry (UV-Vis DRS). The factors affecting the catalytic process were evaluated, including contact time, solution pH, initial dye concentration, etc. The degradation rate of CR and ARS was compared between the photocatalysis, ozonation, and integrated photocatalytic ozonation (PC/O3) methods. The results showed 100% degradation of CR and ARS within 5 min and 40 min, respectively, by integrated PC/O3. The reusability of the modified catalyst was evaluated, and four successive regenerations were achieved. The modified Ni-NiO/C/g-C3N4 composite could be considered an effective, fast, and reusable catalyst in an integrated PC/O3 process for the complete decolourization of wastewater.

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“…The excessive use of orange II dye will significantly pollute water bodies, and prolonged exposure to this dye can result in a number of health problems for humans. 24–26 Many research works have been reported on the adsorption 27–33 and photocatalytic degradation 24–26 of orange II dye using different types of adsorbents and photocatalysts, respectively.…”

Section: Introductionmentioning

confidence: 99%

Purification of aqueous orange II solution through adsorption and visible-light-induced photodegradation using ZnO-modified g-C₃N₄ composites

Suhag,

Khatun,

Tateishi

et al. 2024

RSC Adv.

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Photodegradation of orange II dye using p-n junction NiO/TiO2 composite, and assessment of its biological activities

Cited by 11 publications

References 57 publications

Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Integrated Ozonation Ni-NiO/Carbon/g-C3N4 Nanocomposite-Mediated Catalytic Decomposition of Organic Contaminants in Wastewater under Visible Light

Purification of aqueous orange II solution through adsorption and visible-light-induced photodegradation using ZnO-modified g-C₃N₄ composites

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Photodegradation of orange II dye using p-n junction NiO/TiO2 composite, and assessment of its biological activities

Cited by 11 publications

References 57 publications

Hydrothermally Fabricated NiO@TiO2–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Hydrothermally Fabricated NiO@TiO2–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Integrated Ozonation Ni-NiO/Carbon/g-C3N4 Nanocomposite-Mediated Catalytic Decomposition of Organic Contaminants in Wastewater under Visible Light

Purification of aqueous orange II solution through adsorption and visible-light-induced photodegradation using ZnO-modified g-C3N4 composites

Contact Info

Product

Resources

About

Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Hydrothermally Fabricated NiO@TiO₂–Nanofiber Composite for Efficient Electrocatalytic Hydrogen Evolution Reaction

Purification of aqueous orange II solution through adsorption and visible-light-induced photodegradation using ZnO-modified g-C₃N₄ composites