Facile one-pot synthesis of 3D graphite–SiO<sub>2</sub> composite foam for negative resistance devices

Wu, Ye; Fu, Hao; Roy, Amitava; Song, Pengfei; Lin, Yingcheng; Kizilkaya, Orhan; Xu, Jian

doi:10.1039/c7ra07465d

Cited by 11 publications

(9 citation statements)

References 43 publications

(70 reference statements)

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“…This peak can appear when a carbon atom is with other elements, due to some bonding with neighboring atoms (for example, CO, CH, etc. ), indicating that the PGR is low crystallinity graphite. − The large peak at 288 eV of the standard graphite would be due to the natural oxidation, which is related to the freshness of the sample after opening the package. The 288 eV peak of a fresh sample should be much smaller.…”

Section: Resultsmentioning

confidence: 99%

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

Tsuji

Masutani

Haruyama

et al. 2019

ACS Sustainable Chem. Eng.

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Inexpensive and sensitive graphite electrodes were fabricated by applying flame annealing to pencil-graphite rods (PGRs) as electrodes for water electrolysis cells. The resin (polymer, binder) on the surface of PGR was removed by flame annealing to make it porous, and the graphite electrodes with high activity and low cost were obtained. By flame annealing the PGR, although the PGR electrode became active upon water electrolysis, the PGR electrode became instable for long-time operation. The effects of flame annealing on PGR for water electrolysis were analyzed by SEM, FT-IR spectroscopy, Raman spectroscopy, NEXAFS, and electrochemical impedance spectroscopy (EIS).

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Section: Resultsmentioning

confidence: 99%

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

Tsuji

Masutani

Haruyama

et al. 2019

ACS Sustainable Chem. Eng.

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“…In addition, soft XAS can probe bulk structure information such as crystalline or amorphous states and site occupation. For instance, Wu et al distinguished amorphous and crystalline SiO 2 through analysis of the peak features of the Si K-edge XAS by analyzing the peak features [ 87 ], and Zhang et al demonstrated that the Fe L-edge XAS can be an indicator of tetrahedral and octahedral coordination [ 74 ].…”

Section: Other Xas Applicationsmentioning

confidence: 99%

In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts

et al. 2019

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HIGHLIGHTS • This is the first review paper on the studies of electrocatalysts using advanced in situ X-ray absorption spectroscopy (XAS). • This paper reviews the literatures to-date on new applications of in situ XAS (e.g., single-atom catalysts, surface reactions, nanoparticle size, and site occupation) that traditional XAS has not touched. • This review focuses mostly on recent publications after 2010.

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“…Figure 6b is the Si K-edge XAS around 1848 eV 29 . It shows that all Al-doped Si glasses are in the same amorphous phase as SiO 2 , which eliminates the phase transition influence 30 . In contrast, Al and O XAS spectra in Fig.…”

Section: Resultsmentioning

confidence: 90%

On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study

Chang

Arango

et al. 2019

Sci Rep

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Silica is the most abundant component on the earth’s surface. It plays an important role in many natural processes. Silica is also a critical material for a wide range of technical applications such as in optics and electronics. In this work, we discuss our recent experimental observation of the unusual amber coloration of aluminum doped sol-gel glass that has not been reported in the past. We characterized Al-doped sol-gel glasses, prepared at different sintering temperature, using a plethora of techniques to investigate the origin of this unusual coloration and to understand their structural and chemical properties. We used these experimental results to test a number of possible coloring mechanisms. The results suggested this coloring is likely caused by temperature-dependent aluminum-associated defect centers associated with different amorphous-to-crystalline ratios of the annealed sol-gel silica glass structures.

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Facile one-pot synthesis of 3D graphite–SiO₂ composite foam for negative resistance devices

Abstract: Facile one-pot synthesis of graphite–SiO2 foam for negative resistance devices.

Cited by 11 publications

References 43 publications

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts

On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study

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Facile one-pot synthesis of 3D graphite–SiO2 composite foam for negative resistance devices

Abstract: Facile one-pot synthesis of graphite–SiO2 foam for negative resistance devices.

Cited by 11 publications

References 43 publications

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

Water Electrolysis using Flame-Annealed Pencil-Graphite Rods

In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts

On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study

Contact Info

Product

Resources

About

Facile one-pot synthesis of 3D graphite–SiO₂ composite foam for negative resistance devices