Rapid Synthesis of C-TiO<sub>2</sub>: Tuning the Shape from Spherical to Rice Grain Morphology for Visible Light Photocatalytic Application

Sambandam, Balaji; Surenjan, Anupama; Philip, Ligy; Pradeep, Thalappil

doi:10.1021/acssuschemeng.5b00044

Cited by 78 publications

(32 citation statements)

References 50 publications

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“…In the deconvoluted core level O1 s spectrum (Figure b), the main peak entered at 529.78 eV corresponds to Ti−O−Ti (lattice O 2– ) of anatase TiO 2 . Whereas, the peaks at 530.45, 531.49, and 532.85 originated from Ti−O−C, Ti−OH/CO/O−CO, and C−O, respectively . This result is in consistent with that obtained from the C1 s spectrum of the sample.…”

Section: Resultssupporting

confidence: 90%

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Chattopadhyay

Maiti

Das

et al. 2016

Adv Materials Inter

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cycling especially on fast changing rate due to their low lithium intercalation potential (≈0.1 V vs Li/Li + ), resulting the risk of short circuit that may end up with thermal explosion. [7] Whereas, in case of TiO 2 anode materials, not only its relatively high discharge potential (≈1.7 V vs Li/Li + ) suppresses the formation of lithium dendrites but also its low volume expansion during lithiation/delithiation improves long cycling durability and inhibits the formation of solid electrode interface. [8,9] Thus these two aspects of TiO 2 synergistically facilitate superior safety of batteries along with a theoretical capacity of ≈170 mAh g -1 which is comparable with the commercialized cathode material. [10] Additionally, TiO 2 materials are of low cost, nontoxic, chemically and thermally stable. All these properties make TiO 2 advantageous anode material for lithium ion battery application. Unfortunately, the electrochemical performances of TiO 2 is still challenging due to its low electronic conductivity and Li-ion diffusivity inducing a poor rate capability. [11] In addition to that, uses of TiO 2 nanoparticle anodes are restricted by other several issues like particle agglomeration and dissolution during cycling that result in decrease in electroactive area and performance degradation. Present research on this field has made considerable effort to fabricate dimensionally controlled nanostructured TiO 2 with high surface area to enhance the energy storage performances. [12,13] This is because nanostructured materials offer shortening of Li + diffusion path, large interfacial active area, and also possess the ability to relax the strain generated during Li + insertion/extraction process. [14][15][16] In this perspective 1D nanomaterials such as nanotubes or nanofibers are good choice to satisfy all these criteria due to their large specific surface area and high aspect ratio (surface to volume ratio) which assure favorable transport of both the electrons and Li + . [3,17,18] On the other side, porosity within the structure not only enables high rate capability by decreasing the polarization resistance but also it allows easy access of active sites for Li + , electrons and electrolyte resulting improved kinetics favorable for better cycle performance and storage capacity. [19][20][21] Moreover, Li storage performances in The authors report a novel strategy to fabricate electrospun anatase TiO 2 -rGO composite nanofibers with 3D cubic ordered mesoporosity. Such synthesis route not only ensures molecular level composite formation between rGO and TiO 2 but also retains the rGO content and orders mesostructure after calcination of the nascent fiber at an optimum condition that only removes the surfactant and polymer. Transmission electron microscopic and low angle X-ray diffraction studies confirm the presence of ordered mesoporosity within the nanofibers. Raman and X-ray photoelectron spectroscopy studies reveal the molecular level composite formation between rGO and TiO 2 with chemical bonding. This composite nano...

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Section: Resultssupporting

confidence: 90%

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Chattopadhyay

Maiti

Das

et al. 2016

Adv Materials Inter

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“…Combining the O 1s high-resolution XPS results of B-1, the peak in the B-4 sample with higher energy at 530.5 eV should be Bi–O [44] and the peak at a lower energy of 529.5 eV should be Zn–O. The subtle deviation between the peak positions in the O 1s spectra of the ZnO/BiOI sample and pure ZnO and BiOI confirms the formation of the heterojunction and the charge transfer from Bi–O bonds to Zn–O bonds in the nanocomposite sample [45]. …”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

Zhang¹,

Qin²,

Yu³

et al. 2018

Beilstein J. Nanotechnol.

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In this paper, an efficient method to produce a ZnO/BiOI nano-heterojunction is developed by a facile solution method followed by calcination. By tuning the ratio of Zn/Bi, the morphology varies from nanoplates, flowers to nanoparticles. The heterojunction formed between ZnO and BiOI decreases the recombination rate of photogenerated carriers and enhances the photocatalytic activity of ZnO/BiOI composites. The obtained ZnO/BiOI heterostructured nanocomposites exhibit a significant improvement in the photodegradation of rhodamine B under visible light (λ ≥ 420 nm) irradiation as compared to single-phase ZnO and BiOI. A sample with a Zn/Bi ratio of 3:1 showed the highest photocatalytic activity (≈99.3% after 100 min irradiation). The photodegradation tests indicated that the ZnO/BiOI heterostructured nanocomposites not only exhibit remarkably enhanced and sustainable photocatalytic activity, but also show good recyclability. The excellent photocatalytic activity could be attributed to the high separation efficiency of the photoinduced electron–hole pairs as well as the high specific area.

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“…Water treatments involved so far numerous technologies including both physical and chemical processes [7]. Some of these processes may involve nanotechnology and nanomaterials as coagulant-floculents, adsorbents and/or catalysts [8] [9], and some of them already turned out to be promising materials for environmental applications [10]. The physicochemical properties of such materials are strongly dependent on their structure, morphology and specific surface area [11].…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

et al. 2018

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A facile and eco-friendly method was developed to prepare a microporous CuO@Ag0 core-shell with high catalytic and antibacterial activities. Scanning and transmission electron microscopy revealed a preponderance of nearly spherical 50 nm particles with slight structure compaction. Comparison of the hysteresis loops confirmed the structure compaction after AgNP incorporation, and a significant decrease of the specific surface area from 55.31 m2 g-1 for CuO to 8.03 m2 g-1 for CuO@Ag0 was noticed. A kinetic study of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP) with sodium borohydride revealed a first order reaction that produces total conversion in less than 18 minutes. CuO@Ag0 also exhibited appreciable antibacterial activity against Staphylococcus aureus. The antibacterial effects were found to strongly depend on the size, contact surface, morphology and chemical composition of the catalyst particles. The addition of Ag0-NPs produced more reactive oxygen species in the bacteria medium. These results open promising prospects for its potential applications as a low cost catalyst in wastewater treatment and antibacterial agent in cosmetics.

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Rapid Synthesis of C-TiO₂: Tuning the Shape from Spherical to Rice Grain Morphology for Visible Light Photocatalytic Application

Cited by 78 publications

References 50 publications

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

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Rapid Synthesis of C-TiO2: Tuning the Shape from Spherical to Rice Grain Morphology for Visible Light Photocatalytic Application

Cited by 78 publications

References 50 publications

Electrospun TiO2–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Electrospun TiO2–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

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Product

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Rapid Synthesis of C-TiO₂: Tuning the Shape from Spherical to Rice Grain Morphology for Visible Light Photocatalytic Application

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries

Electrospun TiO₂–rGO Composite Nanofibers with Ordered Mesopores by Molecular Level Assembly: A High Performance Anode Material for Lithium‐Ion Batteries