A new ZnO/rGO/polyaniline ternary nanocomposite as photocatalyst with improved photocatalytic activity

Wu, Huipeng; Lin, Shengling; Chen, Chuanxiang; Liang, Wei; Liu, Xiaoyan; Yang, Hongxun

doi:10.1016/j.materresbull.2016.06.036

Cited by 95 publications

(29 citation statements)

References 73 publications

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“…The generated radicals then degrade MB and produce oxidized organic products. The observed enhanced photocatalytic activity can be attributed to the surface properties of nanocomposites that provide a high surface area, enhancing MB absorption [62]. Photodegradation abilities generally depend on photogenerated electron–hole pairs.…”

Section: Resultsmentioning

confidence: 99%

Effect of GO Additive in ZnO/rGO Nanocomposites with Enhanced Photosensitivity and Photocatalytic Activity

et al. 2019

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Zinc oxide/reduced graphene oxide nanocomposites (ZnO/rGO) are synthesized via a simple one-pot solvothermal technique. The nanoparticle–nanorod turnability was achieved with the increase in GO additive, which was necessary to control the defect formation. The optimal defect in ZnO/rGO not only increased ZnO/rGO surface and carrier concentration, but also provided the alternative carrier pathway assisted with rGO sheet for electron–hole separation and prolonging carrier recombination. These properties are ideal for photodetection and photocatalytic applications. For photosensing properties, ZnO/rGO shows the improvement of photosensitivity compared with pristine ZnO from 1.51 (ZnO) to 3.94 (ZnO/rGO (20%)). Additionally, applying bending strain on ZnO/rGO enhances its photosensitivity even further, as high as 124% at r = 12.5 mm, due to improved surface area and induced negative piezoelectric charge from piezoelectric effect. Moreover, the photocatalytic activity with methylene blue (MB) was studied. It was observed that the rate of MB degradation was higher in presence of ZnO/rGO than pristine ZnO. Therefore, ZnO/rGO became a promising materials for different applications.

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Section: Resultsmentioning

confidence: 99%

Effect of GO Additive in ZnO/rGO Nanocomposites with Enhanced Photosensitivity and Photocatalytic Activity

et al. 2019

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“…C 0 / C can be substituted by A 0 / A for the reason that the concentration ( C ) is directly proportional to the absorbance ( A ) aswhere k is a constant and A is the absorption intensity. 55…”

Section: Methodsmentioning

confidence: 99%

Hierarchically Grown NiO-Decorated Polyaniline-Reduced Graphene Oxide Composite for Ultrafast Sunlight-Driven Photocatalysis

Ahuja

Ujjain

Arora³

et al. 2018

ACS Omega

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Polymers and transition-metal oxides have gained great interest as a photocatalyst in environmental remediation. They could be modified with each other in order to improve their activity. Here, a sunlight-responsive hierarchically structured ternary composite of nickel oxide, polyaniline, and reduced graphene oxide (NiO@PANI/RGO) has been synthesized and employed as a catalyst for dye [methylene blue (MB)] degradation. PANI/GO synthesized by interfacial polymerization acts as a matrix for the growth of NiO using a microemulsion solvothermal method, ensuing an in situ reduction of graphene oxide during the formation of a hierarchical NiO@PANI/RGO composite. Morphological studies of the as-synthesized NiO@PANI/RGO composite reveal fine NiO (10 nm) nanoparticles intercalated between the uniformly grown PANI spines (50–60 nm) over the RGO surface. The optical band gap of ∼1.9 eV calculated from the UV–vis spectrum illustrates the extended light absorption range for the NiO@PANI/RGO photocatalyst. The efficiency of 98% MB degradation within 11 min with the degradation rate constant 0.086 min –1 for NiO@PANI/RGO has surpassed any other report on metal oxide/graphene-based ternary composites. Overall, this work could pave the way for the fabrication of futuristic hierarchical structured ternary nanocomposites as an efficient photocatalyst and facilitate their application in the environmental protection issues.

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“…Photocatalytic degradation of dyes pollutants is one of the AOPs that, because of the ease of operation, fast reaction and its low costs are strongly considered. The requirement for the performance of such processes is the presence of a radiation source with appropriate wavelength and a suitable semiconductor . Among various semiconductors employed as photocatalyst, zinc sulfide (ZnS) could be considered as an appropriate alternative photocatalyst due to the nontoxic nature and high negative reduction potential of excited electrons .…”

Section: Introductionmentioning

confidence: 99%

Novel ZnS/Carbon Nanofiber Photocatalyst for Degradation of Rhodamine 6G: Kinetics Tracking of Operational Parameters and Development of a Kinetics Model

Mehrizad

Gharbani

2017

Photochem & Photobiology

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A novel nanocomposite in the role of photocatalyst was prepared by composition of zinc sulfide (ZnS) nanoparticles with carbon nanofibers (CNFs) and was characterized. The XRD, EDX, and FE-SEM analysis revealed that ZnS is successfully embedded in CNFs matrix. The DRS results indicated that supporting of ZnS by CNFs led to a decrease of the band gap energy. The photocatalytic degradation of a hazardous xanthine dye, Rhodamine 6 G (Rh-6G), by the prepared ZnS/CNFs composite was examined from the kinetics point of view. Nonlinear regression analysis was used to develop a mathematical kinetics model based on the Langmuir-Hinshelwood mechanism, and an empirical equation was obtained for the estimation of apparent pseudo-first-order rate constant (k ) as a function of operational parameters (viz. initial dye concentration, ZnS/CNFs content, pH, and irradiation intensity). Based on the results, k increased with an increase ZnS/CNFs content, pH, and UV light intensity, whereas it decreased by increasing the initial Rh-6G concentration. Moreover, a new kinetics model was obtained based on proposed elementary steps to determine k . In the final stage of the work, intermediate materials produced within photocatalytic degradation of Rh-6G dye were detected by GC-MS analysis.

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A new ZnO/rGO/polyaniline ternary nanocomposite as photocatalyst with improved photocatalytic activity

Cited by 95 publications

References 73 publications

Effect of GO Additive in ZnO/rGO Nanocomposites with Enhanced Photosensitivity and Photocatalytic Activity

Effect of GO Additive in ZnO/rGO Nanocomposites with Enhanced Photosensitivity and Photocatalytic Activity

Hierarchically Grown NiO-Decorated Polyaniline-Reduced Graphene Oxide Composite for Ultrafast Sunlight-Driven Photocatalysis

Novel ZnS/Carbon Nanofiber Photocatalyst for Degradation of Rhodamine 6G: Kinetics Tracking of Operational Parameters and Development of a Kinetics Model

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