Fabrication of CeO2/Fe2O3 composite nanospindles for enhanced visible light driven photocatalysts and supercapacitor electrodes

Narayanasamy, Arul; Mangalaraj, D.; Ramachandran, Rajendran; Grace, Andrews Nirmala; Han, Jeong In

doi:10.1039/c5ta02630j

Cited by 210 publications

(79 citation statements)

References 58 publications

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“…[164] Hollow structures composed of tiny NPs or with nanosized thickness combine the merits from both nanoscale and microscale, which is very useful to overcome current challenges in this field. [167] Many other researchers discovered that hollow CeO 2 structures are efficient in photocatalytic detoxificatation of cyanide, [168] reduction of Hg, [169] as well as the degradation of various dye pollutants, such as methylene blue, [170] acid orange, [171] eosin yellow, [172] and Rhodamine B. The obtained NTs were about 15 ± 5 nm in inner diameter, 25 ± 10 nm in outer diameter, and a few micrometers in length.…”

Section: Photocatalysismentioning

confidence: 99%

Hollow Micro/Nanostructured Ceria‐Based Materials: Synthetic Strategies and Versatile Applications

Wang

2018

Advanced Materials

108

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Hollow micro/nanostructured CeO2‐based materials (HMNCMs) have triggered intensive attention as a result of their unique structural traits, which arise from their hollowness and the fascinating physicochemical properties of CeO2. This attention has led to widespread applications with improved performance. Herein, a comprehensive overview of methodologies applied for the synthesis of various hollow structures, such as hollow spheres, nanotubes, nanoboxes, and multishelled hollow spheres, is provided. The synthetic strategies toward CeO2 hollow structures are classified into three major categories: 1) well‐established template‐assisted (hard‐, soft‐, and in situ template) methods; 2) newly emerging self‐template approaches, including selective etching, Ostwald ripening, the Kirkendall effect, galvanic replacement, etc.; 3) bottom‐up self‐organized formation synthesis (namely, oriented attachment and self‐deformation). Their underlying mechanisms are concisely described and discussed in detail, the differences and similarities of which are compared transversely and longitudinally. Niche applications of HMNCMs in a wide range of fields including catalysis, energy conversion and storage, sensors, absorbents, photoluminescence, and biomedicines are reviewed. Finally, an outlook of future opportunities and challenges in the synthesis and application of CeO2‐based hollow structures is also presented.

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Section: Photocatalysismentioning

confidence: 99%

Hollow Micro/Nanostructured Ceria‐Based Materials: Synthetic Strategies and Versatile Applications

Wang

2018

Advanced Materials

108

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“…Again, CNTs and graphenes are ideal candidates for loading both TMOs and ECPs [64][65][66][72][73][74][75][76][77]. There are also attempts to support the active materials on other inorganic nanomaterials to help not only ion transport kinetics and material stability, but also to exert desired chemical interactions with the active material [81,82]. A fairly successful example was recently reported for coating MnO 2 on nanowires of CeO 2 and the test of the MnO 2 -CeO 2 composite positrode in an asymmetrical supercapacitor with an oxidised graphene negatrode in an aqueous electrolyte of 1.0 mol L −1 Na 2 SO 4 [81].…”

Section: Materials For Supercapatterymentioning

confidence: 99%

Supercapacitor and supercapattery as emerging electrochemical energy stores

Chen

2016

International Materials Reviews

607

199

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This article reviews critically selected recent literature on electrochemical energy storage (EES) technologies, focusing on supercapacitor and also supercapattery which is a generic term for various hybrid devices combining the merits of rechargeable battery and supercapacitor. Fundamentals of EES are explained, aiming at clarification of some literature confusions such as the differences between capacitive and non-capacitive Faradaic charge storage mechanisms, and between cathode and positive electrode (positrode), and between anode and negative electrode (negatrode). In particular, the concept and origin of pseudocapacitance are qualitatively correlated with the band model for semiconductors. Strategies for design and construction of supercapattery are discussed in terms of both the materials structures and device engineering. Selection of materials, including electrolytes, is another topic reviewed selectively. Graphenes and carbon nanotubes are the favourable choice to composite with both capacitive and non-capacitive redox materials for improved kinetics of charge storage processes and charge-discharge cycling stability. Organoaqueous electrolytes show a great potential to enable EES to work at sub-zero temperatures, while solid ion conducting membranes and ionic liquids can help develop high voltage (>4.0 V) and hence high energy supercapatteries. ARTICLE HISTORY

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“…Surface property of CeO 2 and dislocation of dye molecule varies with the different pH value. In basic media, there is an increase in hydroxyl radicals which leads to the increase in photocatalytic activity (Arul et al 2015;Khan et al 2014;Lei et al 2015). Figure 17a shows the effect of catalytic load on the catalytic activity of CeO 2 NPs.…”

Section: Resultsmentioning

confidence: 99%

Fabricated CeO2 nanopowders as a novel sensing platform for advanced forensic, electrochemical and photocatalytic applications

Rohini

Nagabhushana

Darshan³

et al. 2017

Appl Nanosci

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In Forensic investigation, identification of various types of ridge details are essential in order to fix the criminals associated in various crimes. Even though several methods and labeling agents are available to visualize latent finger prints (LFPs) there is still simple, accurate, cost-effective, and non-destructive tool is required. In the present work, CeO 2 nanopowders (NPs) are prepared via simple solution combustion route using Tamarindus indica fruit extract as a fuel. The optimized NPs are utilized for visualization of LFPs on various surfaces by powder dusting method. Results revealed that visualized LFPs exhibit Level 3 features such as pores and ridge contours under normal light with high sensitivity and without background hindrance. The photometric characteristics of the prepared samples exhibit blue color emission and highly useful in warm light emitting diodes. The photocatalytic studies were carried out with different Methylene blue (MB) dye concentration and pH values. The obtained results reveal that the CeO 2 NPs exhibits an excellent catalytic properties which can act as a good catalytic reagent. The findings demonstrate that the prepared NPs are quite useful as a labeling agent for visualization of LFPs, efficient catalysts for dye degradation as well as solid-state lighting applications.

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Fabrication of CeO₂/Fe₂O₃ composite nanospindles for enhanced visible light driven photocatalysts and supercapacitor electrodes

Cited by 210 publications

References 58 publications

Hollow Micro/Nanostructured Ceria‐Based Materials: Synthetic Strategies and Versatile Applications

Hollow Micro/Nanostructured Ceria‐Based Materials: Synthetic Strategies and Versatile Applications

Supercapacitor and supercapattery as emerging electrochemical energy stores

Fabricated CeO2 nanopowders as a novel sensing platform for advanced forensic, electrochemical and photocatalytic applications

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