Controlled growth of hexagonal Zn<sub>2</sub>GeO<sub>4</sub> nanorods on carbon fibers for photocatalytic oxidation of p-toluidine

Jiang, Guohua; Tang, Bolin; Chen, Hua; Liu, Yongkun; Li, Lei; Huang, Qin

doi:10.1039/c5ra01972a

Cited by 14 publications

(6 citation statements)

References 45 publications

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“…In the equivalent circuit, R e is the electrolyte resistance; R (sf+ct) is the resistance corresponding to the surface film and charge transfer; CPE (sf+dl) is the constant phase element resulting from the surface film and double layer capacitance; R b is the bulk resistance; CPE b is the bulk capacitance, and W o is the Warburg resistance. On the basis of the fitted results, the value of R (sf+ct) for fascicular ZGO-2 was 104.2 Ω, which is far lower than that for ZGO-0 (131.0 Ω). ,, Therefore, this result further confirms that the fascicular ZGO-2 possesses high electrical conductivity, thus resulting in better rate capability and higher reversible capacity compared to those of the other samples, which is consistent with its CV performance.…”

Section: Resultssupporting

confidence: 70%

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance

Liu

Zhou

Zheng

et al. 2017

ACS Appl. Mater. Interfaces

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Zinc germinate (ZnGeO) with a hierarchical structure was successfully synthesized in a binary ethylenediamine/water (En/HO) solvent system by wet chemistry methods. The morphological evolution process of the ZnGeO was investigated in detail by tuning the ratio of En to HO in different solvent systems, and a series of compounds with awl-shaped, fascicular, and cross-linked hierarchical structures was obtained and employed as anode materials in lithium-ion batteries. The materials with fascicular structure exhibited excellent electrochemical performance, and a specific reversible capacity of 1034 mA h g was retained at a current density of 0.5 A g after 160 cycles. In addition, the as-prepared nanostructured electrode also delivered impressive rate capability of 315 mA h g at the current density of 10 A g. The remarkable electrochemical performances could be ascribed to the following aspects. First, each unit in the three-dimensional fascicular structure can effectively buffer the volume expansions during the Li extraction/insertion process, accommodate the strain induced by the volume variation, and stabilize its whole configuration. Meanwhile, the small fascicular units can enlarge the electrode/electrolyte contact area and form an integrated interlaced conductive network which provides continuous electron/ion pathways.

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Section: Resultssupporting

confidence: 70%

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance

Liu

Zhou

Zheng

et al. 2017

ACS Appl. Mater. Interfaces

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“…As an important semiconductor with wide bandgap (∼4.5 eV), Zn 2 GeO 4 (ZGO) has received intense attention due to its stable optical and electrochemical properties and wide range of applications such as water splitting, − CO 2 reduction, − lithium ion storage, ,, photoluminescence, , and so on. To date, various crystalline ZGO materials with different structures and morphologies have been synthesized and investigated. ,,, In particular, one-dimensional (1D) ZGO nanostructure arrays are considered as most favorable for photochemical applications. ,− Recently, ZGO nanorod/nanowire arrays grown on carbon fibers or Si substrates have been prepared through hydrothermal or high-temperature CVD methods. − However, fabrication of amorphous ZGO or ZGO-based nanowire arrays with tunable band structures remains a great challenge, especially, in a simple and facile solution way …”

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confidence: 99%

Amorphous Semiconductor Nanowires Created by Site-Specific Heteroatom Substitution with Significantly Enhanced Photoelectrochemical Performance

Zhang

Mao

et al. 2016

ACS Nano

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Semiconductor nanowires that have been extensively studied are typically in a crystalline phase. Much less studied are amorphous semiconductor nanowires due to the difficulty for their synthesis, despite a set of characteristics desirable for photoelectric devices, such as higher surface area, higher surface activity, and higher light harvesting. In this work of combined experiment and computation, taking Zn2GeO4 (ZGO) as an example, we propose a site-specific heteroatom substitution strategy through a solution-phase ions-alternative-deposition route to prepare amorphous/crystalline Si-incorporated ZGO nanowires with tunable band structures. The substitution of Si atoms for the Zn or Ge atoms distorts the bonding network to a different extent, leading to the formation of amorphous Zn1.7Si0.3GeO4 (ZSGO) or crystalline Zn2(GeO4)0.88(SiO4)0.12 (ZGSO) nanowires, respectively, with different bandgaps. The amorphous ZSGO nanowire arrays exhibit significantly enhanced performance in photoelectrochemical water splitting, such as higher and more stable photocurrent, and faster photoresponse and recovery, relative to crystalline ZGSO and ZGO nanowires in this work, as well as ZGO photocatalysts reported previously. The remarkable performance highlights the advantages of the ZSGO amorphous nanowires for photoelectric devices, such as higher light harvesting capability, faster charge separation, lower charge recombination, and higher surface catalytic activity.

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“…The surface of the nitric acid-treated CFs exhibits a series of parallel deep grooves (Figure 1(a)), which can be ascribed to the strong etching of nitric acid. 19 These grooves will increase the active functional groups and the specific surface area of the CFs that benefit from the immobilization of the…”

Section: Morphologies Of the Tio 2 /Cf Compositesmentioning

confidence: 99%

Preparation of titanium dioxide immobilized on carbon fibers annealed in steam ambient and their photocatalytic properties

Pang

Zhu

et al. 2016

Textile Research Journal

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Composites of titanium dioxide (TiO2) immobilized on carbon fibers (CFs) were synthesized by a two-step process. Acid-treated CFs were dip-coated in a TiO2 sol and then annealed under superheated steam ambient to form TiO2/CF composites. The effects of titanium sol concentration and annealing temperature on the micromorphology and phase structure of the TiO2/CF were investigated by field emission scanning electron microscopy and X-ray diffraction, respectively. The photocatalytic properties of the as-prepared TiO2/CFs were evaluated by photocatalytic degradation of acid orange II under ultraviolet light irradiation. The TiO2/CF composites prepared by superheated steam annealing exhibited a uniform surface morphology and high loading degree. The photocatalytic degradation of acid orange indicated that the TiO2/CF composites exhibited excellent photocatalytic performance and reached up to 98.7% degradation rate after 2.5 h of irradiation.

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Controlled growth of hexagonal Zn₂GeO₄ nanorods on carbon fibers for photocatalytic oxidation of p-toluidine

Abstract: Hexagonal Zn2GeO4 nanorods grown on the surface of carbon fiber substrates have been prepared for photocatalytic oxidation of p-toluidine.

Cited by 14 publications

References 45 publications

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance

Amorphous Semiconductor Nanowires Created by Site-Specific Heteroatom Substitution with Significantly Enhanced Photoelectrochemical Performance

Preparation of titanium dioxide immobilized on carbon fibers annealed in steam ambient and their photocatalytic properties

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Controlled growth of hexagonal Zn2GeO4 nanorods on carbon fibers for photocatalytic oxidation of p-toluidine

Abstract: Hexagonal Zn2GeO4 nanorods grown on the surface of carbon fiber substrates have been prepared for photocatalytic oxidation of p-toluidine.

Cited by 14 publications

References 45 publications

Hierarchical Structural Evolution of Zn2GeO4 in Binary Solvent and Its Effect on Li-ion Storage Performance

Hierarchical Structural Evolution of Zn2GeO4 in Binary Solvent and Its Effect on Li-ion Storage Performance

Amorphous Semiconductor Nanowires Created by Site-Specific Heteroatom Substitution with Significantly Enhanced Photoelectrochemical Performance

Preparation of titanium dioxide immobilized on carbon fibers annealed in steam ambient and their photocatalytic properties

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Controlled growth of hexagonal Zn₂GeO₄ nanorods on carbon fibers for photocatalytic oxidation of p-toluidine

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance

Hierarchical Structural Evolution of Zn₂GeO₄ in Binary Solvent and Its Effect on Li-ion Storage Performance