Photocatalytic properties of Mn-doped NiO spherical nanoparticles synthesized from sol-gel method

Lee, Sejoon; Sharma, Sanjeev K.; An, Namhyun; Lee, Seung Joo; Kim, Deuk Young; Im, Young Jae; Cho, Yung Duk; Ganesh, R. Sankar; Ponnusamy, S.; Raji, P.; Purohit, L.P.

doi:10.1016/j.ijleo.2016.08.126

Cited by 115 publications

(29 citation statements)

References 33 publications

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“…NiO nanostructures are chemically stable and has good electrical conductivity as well as magnetic and optical properties, which make it a promising material for technological applications such as antiferromagnetic materials (7), electrode materials for lithium-ion batteries (8), electrochemical supercapacitors (9), gas sensors adsorbents (10), optical amplifier and tunable laser (11), photovoltaic devices (12) and electrochromic materials (13,14). Methods such as sol-gel method (15), solvothermal route (16), hydrothermal (17), thermal decomposition (18), precipitation method (19), and plants such as Moringa oleifera (20), Tamarix serotine (21), Callistemon viminalis (22) and Agathosma betulina (23) allow the synthesis of NiO nanostructures. Among them, TiO 2 is one of the excellent metal oxide photocatalysts for water splitting and oxidative degradation of organic pollutants (24,25).…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Diallo

Kaviyarasu

Ndiaye

et al. 2018

Green Chemistry Letters and Reviews

106

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NiO is one of the most important candidates for semiconductors metal oxide nanocrystals by the arrangement of photocatalytic application. However, the photocatalytic performance of biosynthesized nanocrystals using Aspalathus linearis (Burm.f.) R. Dahlgren has not been investigated yet. In this contribution, we synthesize α-Ni(OH) 2 using an A. linearis. A heat treatment of the α-Ni(OH) 2 is carried out at 300-400°C for 2 h at normal air yields. Furthermore, we have characterized the structural, optical and photocatalytic activity of the samples. The optical results indicate that biosynthesized nanocrystals exhibit UV-visible light absorption and a narrow range distribution of intense green light (518.95 nm) emission, which decreases significantly as annealing temperature increases. The bandgap energies of the sample annealed at 300-400°C shift to lower photon energy, compared to bulk NiO (∼ 4 eV). Moreover, the photocatalytic experimental results reveal that NiO nanocrystals enable color switching of methylene blue.

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Section: Introductionmentioning

confidence: 99%

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Diallo

Kaviyarasu

Ndiaye

et al. 2018

Green Chemistry Letters and Reviews

106

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“…This phenomenon can also be seen in NiO‐based and other materials . In addition, the degradation efficiency of the as‐formed ZnO/Ni 0.9 Zn 0.1 O‐82 catalyst is superior to those NiO and NiO‐based catalysts modified by other components under the same UV‐light source (Figure d) …”

Section: Resultsmentioning

confidence: 57%

“…Migration of electrons to CB induces the formation of holes in VB, and the positive holes can react with surface bound water to generate the hydroxyl radical ( . OH), which can thus be considered as active center to promote the photocatalytic reaction . It is also a dominating procedure for MB degradation in this work, which has proven by the trapping experiments (Figure a).…”

Section: Resultsmentioning

confidence: 65%

Bimetallic Metal‐Organic Framework Derived ZnO/Ni_0.9Zn_0.1O Nanocomposites for Improved Photocatalytic Degradation of Organic Dyes

Zhong

Zhao

et al. 2020

ChemistrySelect

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An optimized structure is of considerable importance for nickle oxide (NiO)‐based materials to achieve high performance as catalyst for contaminant degradation due to the inherent large band gap. Herein, a series of hybrids of NiO nanoparticles doped with zinc oxide (ZnO) semiconductor were fabricated via a facile one‐step calcination of bimetallic metal‐organic frameworks with varied Ni2+/Zn2+ molar ratios (MOF‐NiZn). It is worth noting that partial positions of Ni in NiO lattice are replaced by Zn to form a Ni0.9Zn0.1O phase. Benefiting from the unique hybrid advantage, the rationally designed material could effectively lower the band gap of NiO, thus improving the photocatalytic performance. The optimized ZnO/Ni0.9Zn0.1O‐82 catalyst exhibits the highest degradation activity towards methylene blue (MB) with efficiency up to 97.4 % within 60 min. Additionally, the radicals trapping experiments reveal that the photo‐generated hydroxyl radical (.OH) is the predominant active species during the photodegradation of MB.

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“…In this regard, metal oxide nanomaterials such as NiO nano-disks have shown a promising potential for dye adsorption and photodecomposition. This metal oxide as doped and undoped has been synthesized via different techniques such as sol-gel [156], metal organic chemical vapor deposition [157], precipitation [158], solvothermal route [159], and a hydrothermal method [160]. The latter technique has been used for synthesis of NiO nano-disks (5-20 nm) as the photocatalysts that can photodegrade MB dye under visible light (98.7% in 20 min).…”

Section: D Inorganic Nano-adsorbentsmentioning

confidence: 99%

The Nanosized Dye Adsorbents for Water Treatment

Homaeigohar

2020

Nanomaterials

145

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Clean water is a vital element for survival of any living creature and, thus, crucially important to achieve largely and economically for any nation worldwide. However, the astonishingly fast trend of industrialization and population growth and the arisen extensive water pollutions have challenged access to clean water across the world. In this regard, 1.6 million tons of dyes are annually consumed. Thereof, 10%–15% are wasted during use. To decolorize water streams, there is an urgent need for the advanced remediation approaches involving utilization of novel materials and technologies, which are cost and energy efficient. Nanomaterials, with their outstanding physicochemical properties, can potentially resolve the challenge of need to water treatment in a less energy demanding manner. In this review, a variety of the most recent (from 2015 onwards) opportunities arisen from nanomaterials in different dimensionalities, performances, and compositions for water decolorization is introduced and discussed. The state-of-the-art research studies are presented in a classified manner, particularly based on structural dimensionality, to better illustrate the current status of adsorption-based water decolorization using nanomaterials. Considering the introduction of many newly developed nano-adsorbents and their classification based on the dimensionality factor, which has never been employed for this sake in the related literature, a comprehensive review will be presented.

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Photocatalytic properties of Mn-doped NiO spherical nanoparticles synthesized from sol-gel method

Cited by 115 publications

References 33 publications

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Bimetallic Metal‐Organic Framework Derived ZnO/Ni_0.9Zn_0.1O Nanocomposites for Improved Photocatalytic Degradation of Organic Dyes

The Nanosized Dye Adsorbents for Water Treatment

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Photocatalytic properties of Mn-doped NiO spherical nanoparticles synthesized from sol-gel method

Cited by 115 publications

References 33 publications

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Bimetallic Metal‐Organic Framework Derived ZnO/Ni0.9Zn0.1O Nanocomposites for Improved Photocatalytic Degradation of Organic Dyes

The Nanosized Dye Adsorbents for Water Treatment

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Bimetallic Metal‐Organic Framework Derived ZnO/Ni_0.9Zn_0.1O Nanocomposites for Improved Photocatalytic Degradation of Organic Dyes