Electrospinning amorphous SiO2-TiO2 and TiO2 nanofibers using sol-gel chemistry and its thermal conversion into anatase and rutile

Huang, Fei; Motealleh, Behrooz; Zheng, Wenzhong; Janish, Matthew T.; Carter, C. Barry; Cornelius, Chris J.

doi:10.1016/j.ceramint.2017.10.134

Cited by 29 publications

(15 citation statements)

References 59 publications

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“…The results of XRD patterns obviously proved the success of preparation of MnO 2 nanowire precursors (indexed to JCPDS 44–141) and generation of the carbon-based materials (Figure a). Since the SiO 2 coating and CA etching, broad peaks (20–30°) of amorphous SiO 2 gradually appeared and MnO 2 peaks completely disappeared . The peak intensity of the HCT and NHCT also indicated that these hollow carbon-based materials possessed the amorphous structure after the treatment of HF solution for removal of the SiO 2 template.…”

Section: Resultsmentioning

confidence: 98%

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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Carbon-based materials are important desirable materials in areas such as supercapacitors and capacitive deionization. However, traditional commercial materials are heterogeneous and prone to agglomeration in nanoscale and have structural limitation of electrochemical and desalination performance due to poor transport channels and low capacitance of prepared electrodes. Here, we introduce the facile strategy for controllable preparation of two types of hollow carbon-based nanotubes (HCTs) with amorphous mesoporous structures, which are synthesized by employing a MnO2 linear template method and calcination of polymer precursors. The porous N-doped HCT (NHCT) shows a specific capacitance of 412.6 F g–1 (1 A g–1), with 77.3% rate capability (20 A g–1). The fabricated asymmetric MnO2//NHCT supercapacitor displays the energy density of 55.8 Wh kg–1 at a power density of 803.9 W kg–1. Furthermore, two typical MnO2//HCT and MnO2//NHCT devices both show the selective desalination performance of sulfate, and the MnO2//NHCT device possesses a high deionization value of 11.37 mg g–1 (500 mg L–1 Na2SO4). These fabricated hollow carbon-based architectures with functional characteristics promise potential applications in energy and environmental related fields.

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Section: Resultsmentioning

confidence: 98%

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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“…ART temperature generally relies on various factors, such as the synthesis method, existence of impurities/dopants, and atmosphere . Doping of TiO 2 using metal/nonmetal ions is one of the most convenient and cost-effective approaches to tune the band gap energy for visible-light absorption and to control the ART at high temperatures. ,− ART of metal-doped TiO 2 is influenced by the ionic radius, oxidation state, and bonding nature of the dopant …”

Section: Introductionmentioning

confidence: 99%

Indium-Doped TiO₂ Photocatalysts with High-Temperature Anatase Stability

et al. 2019

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The thermal stability of anatase titanium dioxide (TiO2) is a prerequisite to fabricate photocatalyst coated indoor building materials for use in antimicrobial and self-cleaning applications under normal room light illumination. Metal doping of TiO2 is an appropriate way to control the anatase to rutile phase transition (ART) at high processing temperature. In this present work, ART of indium (In) doped TiO2 (In-TiO2) was investigated in detail in the range of 500 °C -900 °C. In-TiO2 (In mol % = 0 to 16) was synthesized via a modified solgel approach. These nanoparticles were further characterized by means of powder X-ray diffraction (XRD), Raman, photoluminescence (PL), transient photocurrent response, and Xray photoelectron spectroscopy (XPS) techniques. XRD results showed that the anatase phase was maintained up to 64 % by 16-mol % of In doping at 800 °C of calcination temperature.XPS results revealed that the binding energies of Ti 4+ (Ti 2p1/2 and Ti 2p3/2) were red-shifted by In doping. The influence of In doping on the electronic structure and oxygen vacancy formation of anatase TiO2 was studied using density functional theory corrected for on-site Coulomb interactions (DFT+U). First principles results showed that the charge compensating oxygen vacancies form spontaneously at sites adjacent to the In dopant. DFT+U calculations revealed the formation of In -5s states in the band gap of the anatase host. The formation of In2O3 at the anatase surface was also examined using a slab model of the anatase (101)

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“…When exposed to different types of liquids including water, mineral oil, ethanol, or surfactantrich water, Janus membranes can potentially limit their wicking into the membrane compared to other membranes. For example, superhydrophobic membranes are adequately resistant to high surface tension liquids but are easily wetted by low surface tension liquids [47,48].…”

Section: Anti-fouling and Anti-wetting Propertiesmentioning

confidence: 99%

Janus membranes for membrane distillation: Recent advances and challenges

Afsari

Shon

Tijing

2021

Advances in Colloid and Interface Science

120

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Membrane distillation (MD) is a promising hybrid thermal-membrane separation technology that can efficiently produce freshwater from seawater or contaminated wastewater.However, the relatively low flux and the presence of fouling or wetting agents in feed solution negate the applicability of MD for long term operation. In recent years, 'two-faced' membranes or Janus membranes have shown promising potential to decrease wetting and fouling problem of common MD system as well as enhance the flux performance. In this review, a comprehensive study was performed to investigate the various fabrication, modification, and novel design processes to prepare Janus membranes and discuss their performance in desalination and wastewater treatment utilizing MD. The promising potential, challenges and future prospects relating to the design and use of Janus membranes for MD are also tackled in this review.

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Electrospinning amorphous SiO2-TiO2 and TiO2 nanofibers using sol-gel chemistry and its thermal conversion into anatase and rutile

Cited by 29 publications

References 59 publications

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Indium-Doped TiO₂ Photocatalysts with High-Temperature Anatase Stability

Janus membranes for membrane distillation: Recent advances and challenges

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Electrospinning amorphous SiO2-TiO2 and TiO2 nanofibers using sol-gel chemistry and its thermal conversion into anatase and rutile

Cited by 29 publications

References 59 publications

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Indium-Doped TiO2 Photocatalysts with High-Temperature Anatase Stability

Janus membranes for membrane distillation: Recent advances and challenges

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Product

Resources

About

Indium-Doped TiO₂ Photocatalysts with High-Temperature Anatase Stability