Surfactant free, simple, morphological and defect engineered ZnO nanocatalyst: Effective study on sunlight driven and reusable photocatalytic properties

Ranjith, Kugalur Shanmugam

doi:10.1016/j.jphotochem.2016.06.014

Cited by 25 publications

(7 citation statements)

References 49 publications

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“…The excellent photo-catalytic properties were due to the high percentage of polar facets and high oxygen vacancy concentrations which decreased in the order of rose-like > hexagonal prisms > ZnO plates. Later, many other groups synthesized different morphologies of ZnO and claimed that the enhanced photo-activities were due to the high exposure of polar facets and large number of oxygen vacancies [173][174][175][176][177][178].…”

Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…Journal of Nanomaterials nanocatalysts rely on size and morphology of the synthesized material. Different methods are available in the literature to describe the synthetic procedures for controlling the size and morphology of the zinc oxide nanocatalysts such as coprecipitation [119], microwave assisted [153], combustion [154], ion exchange, and vapor phase transport [155]. In 2015, Saikia et al reported the synthesis of zinc oxide nanocatalysts through the leaf extract of Carica papaya and its application in the synthesis of oxime derivatives [156].…”

mentioning

confidence: 99%

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Hussain

Kamal

Hossain

2019

Journal of Nanomaterials

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Nanocatalysis is an emerging field of research and is applicable to nearly all kinds of catalytic organic conversions. Nanotechnology is playing an important role in both industrial applications and academic research. The catalytic activities become pronounced as the size of the catalyst reduces and the surface area-to-volume ratio increases which ultimately enhance the activity and selectivity of nanocatalysts. Similarly, the morphology of the particles also has a great impact on the activity and selectivity of nanocatalysts. Moreover, the electronic properties and geometric structure of nanocatalysts can be affected by polar and nonpolar solvents. Various forms of nanocatalysts have been reported including supported nanocatalysts, Schiff-based nanocatalysts, graphene-based nanocatalysts, thin-film nanocatalysts, mixed metal oxide nanocatalysts, magnetic nanocatalysts, and core-shell nanocatalysts. Among a variety of different rare earth and transition metals, palladium-based nanocatalysts have been extensively studied both in academia and in the industry because of their applications such as in carbon-carbon cross-coupling reactions, carbon-carbon homocoupling reactions, carbon-heteroatom cross-coupling reactions, and C-H activation, hydrogenation, esterification, oxidation, and reduction. The current review highlights the recent developments in the synthesis of palladium and some other metal nanocatalysts and their potential applications in various organic reactions.

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“…The generation of reactive oxygen species (ROS) was also quantified using nitroblue tetrazolium (NBT) (100 mM) and p-chlorobenzoic acid (100 mM) as indicators to determine the amounts of superoxide radical ( • O 2 ) and hydroxyl radical ( • OH), respectively. 32…”

Section: Methodsmentioning

confidence: 99%

“…Additional experiments were performed for five consecutive cycles to test the stability and reusability of the photocatalysts. The generation of reactive oxygen species (ROS) was also quantified using nitroblue tetrazolium (NBT) (100 mM) and p -chlorobenzoic acid (100 mM) as indicators to determine the amounts of superoxide radical ( • O 2 ) and hydroxyl radical ( • OH), respectively …”

Section: Methodsmentioning

confidence: 99%

Promotional Effect of Cu₂S–ZnS Nanograins as a Shell Layer on ZnO Nanorod Arrays for Boosting Visible Light Photocatalytic H₂ Evolution

et al. 2020

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The construction of systematically designed heterostructures with different integrated functionalities in a well-oriented nanoarchitecture is an efficient strategy for attaining high-performance photocatalysts. In this work, a heterostructural platform of ZnO–ZnS–Cu2S core–shell nanorod (NR) arrays is prepared as a photocatalyst for efficient H2 evolution using visible light. The fabrication is a three-step process involving solution growth of a ZnO NR array, followed by reactive sputtering of Cu2O, and then a sulfidation reaction. Addition of a ZnS interlayer to the ZnO–Cu2S core–shell arrays further extends the visible light absorbance range and promotes effective charge carrier separation. More importantly, the transition of Cu2O into Cu2S ensures the effective interaction of the core–shell assembly with the ZnS-based interface, thereby creating a valuable energy-level configuration and spectral bands that allow accurate separation of the photogenerated charge carrier. The effective H2 evolution in response to visible light irradiation is 436 μmol h–1 g–1 for the ZnO–ZnS–Cu2S (8 h) NR arrays, which is 2.55 and 1.61 times higher than that achieved with ZnO–Cu2O and ZnO–Cu2S photocatalytic NR arrays, respectively. The pollutant degradation rate for ZnO–ZnS–Cu2S (8 h) NR arrays under visible light irradiation is 7.8, 2.7, and 1.6 times higher than that achieved with pristine ZnO, ZnO–Cu2O, and ZnO–Cu2S core–shell structures, respectively. These visible light-responsive core–shell heterostructures show promising reuse properties and maintain their stability during use.

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Surfactant free, simple, morphological and defect engineered ZnO nanocatalyst: Effective study on sunlight driven and reusable photocatalytic properties

Cited by 25 publications

References 49 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Promotional Effect of Cu₂S–ZnS Nanograins as a Shell Layer on ZnO Nanorod Arrays for Boosting Visible Light Photocatalytic H₂ Evolution

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Surfactant free, simple, morphological and defect engineered ZnO nanocatalyst: Effective study on sunlight driven and reusable photocatalytic properties

Cited by 25 publications

References 49 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Promotional Effect of Cu2S–ZnS Nanograins as a Shell Layer on ZnO Nanorod Arrays for Boosting Visible Light Photocatalytic H2 Evolution

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Promotional Effect of Cu₂S–ZnS Nanograins as a Shell Layer on ZnO Nanorod Arrays for Boosting Visible Light Photocatalytic H₂ Evolution