High hydrogen storage capacity of heteroatom-containing porous carbon nanospheres produced from cross-linked polyphosphazene nanospheres

Fu, Jianwei; Wang, Minghuan; Zhang, Chao; Zhang, Peng; Xu, Qun

doi:10.1016/j.matlet.2012.04.152

Cited by 19 publications

(6 citation statements)

References 11 publications

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“…Thus, hydrothermal treatment had no effect on the isotherm shape but did affect all pore volumes. Interestingly, the SBET (3301 m 2 /g, 3394 m 2 /g, and 3485 m 2 /g) was increased with the hydrothermal time, which is favorable for hydrogen storage (Fu et al 2012;Zhao et al 2013). The pore size distributions of N2 adsorption isotherms are represented in Fig.…”

Section: Sem Analysismentioning

confidence: 99%

“…To improve hydrogen storage, the gas-solid interaction can be strengthened by introducing metal nanoparticles (Pd, Ni, Pt) or heteroatoms (B, N, S, P) in the carbon matrix (Fu et al 2012;Zhao et al 2013;Adhikari et al 2016;Wang et al 2016). Nitrogen doping has been studied extensively, and various theoretical investigations show that the doping of nitrogen atoms increases the adsorption energy of hydrogen atoms at the neighboring C-atom sites (Zheng et al 2010;Xia et al 2011;Fu et al 2012;Zhao et al 2013;Huang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Doping of Nitrogen in Bamboo-Based Super Activated Carbon for Hydrogen Storage

et al. 2017

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N-doped microporous activated carbons were synthesized by hydrothermal doping with ammonia as the nitrogen precursor; the chemical, structural, and hydrogen storage properties of the developed activated carbons (ACs) were also examined. The results showed that this method is an effective way of preparing microporous activated carbons with high surface area. Both the surface areas and the N contents of ACs were increased after hydrothermal doping, and hence, the hydrogen storage capacities were improved. The hydrogen storage capacity of the N-doped ACs was 3.10 wt.% at 77 K and 1 bar, showing an enhancement factor of 1.13 and corresponding to the NAC with both highest surface area (3485 m 2 /g) and N content (2.2 wt.%). Statistical analysis showed that both the N content and surface area had positive contributions to the hydrogen storage, and it also could be predicted by the linear model from the N content and surface area. These results were among the best in hydrogen storage carbon materials, and the high hydrogen storage capacities were attributed to the high surface area.

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Section: Sem Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrothermal Doping of Nitrogen in Bamboo-Based Super Activated Carbon for Hydrogen Storage

et al. 2017

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“…The activation of PPNs derived carbon material is a vital step to get structurally‐imperfect materials bearing extensive active sites, and to remove the template materials used for hollow materials synthetic strategy. Strong bases like NaOH/KOH have been used in different ratios like 1 : 1, 2 : 1and 3 : 1 with carbon materials to induce structural‐disorders, imperfections, active sites and to obtain significant BET area, pore‐diameter and pore‐volume [65] . The PPNs carbons along‐with KOH proportions further pyrolyzed in N 2 /Ar environment to enhance, the heteroatoms counter‐part.…”

Section: Auto‐doping (Carbon Materials)mentioning

confidence: 99%

A Review on the Morphologically Controlled Synthesis of Polyphosphazenes for Electrochemical Applications

Ali

Basharat

2021

ChemElectroChem

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Polyphosphazenes (PPNs) belong to organic‐inorganic hybrid polymeric skeletal materials suitably fabricated via precipitation or condensation polymerization and self‐assembly approaches. Organic moieties with two and three −NH2 or −OH functionalities inherit subsequent ordered 2D and 3D arrangements of the atoms and molecules to attain the morphologies such as nanotubes, nano/micro‐spheres, fibers, nanosheets, and covalent organic frameworks (COFs). Auto‐doping is a strategic feature of PPN materials to originate binary‐, ternary‐, and quaternary‐doped carbon frameworks and graphitic carbon nitride (g‐C3N4) upon direct pyrolysis in an inert environment. Hollow carbon spheres provides a good range of surface areas (ca. 755–3673 m2/g) with enormous active sites and hierarchical channels for the effective flow of electrolyte ions, which make them a good choice for solid‐state batteries and supercapacitors; structural irregularities and imperfections offer surface‐adsorbed breakdown of water and open new horizons for water splitting through hydrogen evolution, oxygen evolution and oxygen reduction with the lowest half‐wave (E1/2) potential when compared to Pt/C‐ and Pt/C+RuO2‐based electrocatalysts.

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“…Reaksiyona sokulan organik yan grubun özelliğine göre elde edilen siklomatriks polifosfazen malzemeler değişik uygulamalarda kullanılabilmektedir. Örnek olarak metal, boya adsorpsiyonu (Jiang et al 2019, Wei et al 2015, kontrollü ilaç salımı (Hou et al 2018, Metinoğlu Örüm andSüzen Demircioğlu 2019), katalizör (Fu et al 2018), alev geciktirme (Malkappa andRay 2019, Qiu et al 2017), fototermal ve fotodinamik terapi (Wei et al 2018), gaz depolama (Fu et al 2012) uygulamaları verilebilir. Fosfazenler toksik olmayan, biyouyumlu ve biyolojik olarak amonyak ve fosfata kadar parçalanabilen bileşiklerdir.…”

Section: Introductionunclassified

Yeni Floresans Özellikli Çapraz Bağlı Polifosfazen Mikrokürelerin Sentezi ve Karakterizasyonu

Örüm¹

2020

Afyon Kocatepe University Journal of Sciences and Engineering

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Siklomatriks yapılı net-poli(siklotetrafosfazen-ko-tiramin) mikroküreler çöktürme polimerizasyonu ile tek adımda sentezlenmiştir. Elde dilen mikrokürelerin karakterizasyonu SEM, EDX, FTIR, XRD ve DLS teknikleri ile yapılmıştır. Ayrıca mikrokürelerin UV ve floresans özellikleri de incelenmiş olup, mikrokürelerin 239 nm'de maksimum absorbans yaptığı belirlenmiştir. Tiramin ve mikrokürelerin katı hal floresans özellikleri, 254 nm dalga boyunda uyarılarak incelenmiştir. Tiramin çok zayıf emisyon yaparken, mikroküreler 308 nm'de şiddetli emisyon göstermiştir. Elde edilen sonuçlar, sentezlenen polifosfazen mikrokürelerin sensör, biyolojik kataliz ve görüntüleme gibi floresans uygulamalar için yüksek potansiyele sahip olduğunu göstermektedir.

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High hydrogen storage capacity of heteroatom-containing porous carbon nanospheres produced from cross-linked polyphosphazene nanospheres

Cited by 19 publications

References 11 publications

Hydrothermal Doping of Nitrogen in Bamboo-Based Super Activated Carbon for Hydrogen Storage

Hydrothermal Doping of Nitrogen in Bamboo-Based Super Activated Carbon for Hydrogen Storage

A Review on the Morphologically Controlled Synthesis of Polyphosphazenes for Electrochemical Applications

Yeni Floresans Özellikli Çapraz Bağlı Polifosfazen Mikrokürelerin Sentezi ve Karakterizasyonu

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