A nitrogen-rich mesoporous polymer for photocatalytic hydrogen evolution from water

Qu, Ailan; Xu, Xinmei; Zhang, Yangyu; Li, Yuyu; Zha, Wenying; Wen, Shengwu; Xie, Haolong; Wang, Junxian

doi:10.1016/j.reactfunctpolym.2016.03.005

Cited by 28 publications

(11 citation statements)

References 55 publications

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“…As shown in Figure , chemical constitution and morphology of samples are investigated by FTIR, XRD, TEM, and XPS. Intensity of typical diffraction peak of COFs nonosheet at around 23.5° decreases sharply compared with that of COFs in Figure a . It can be explained that specific three-dimensional structure of COFs is destroyed by ball milling, leading to form of COFs nanosheets.…”

Section: Results and Discussionmentioning

confidence: 83%

Novel Melamine/o-Phthalaldehyde Covalent Organic Frameworks Nanosheets: Enhancement Flame Retardant and Mechanical Performances of Thermoplastic Polyurethanes

Zhan

Feng

et al. 2017

ACS Appl. Mater. Interfaces

112

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Covalent organic frameworks (COFs) nanosheets prepared from condensation reaction between melamine and o-phthalaldehyde are first prepared through ball milling and then incorporated into thermoplastic polyurethanes (TPU) by solution mixing. Transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectrometer are applied to characterize COFs nanosheets. It is observed apparently from TEM image that COFs nanosheets are obtained. Successful preparation of COFs nanosheets is proved further by vanishment of typical diffraction peak of COFs at around 23.5° in COFs nanosheets XRD pattern, appearance of quadrant and semicircle stretching of the s-triazine ring at 1568 and 1469 cm in FTIR spectra and N═C bond at 389.5 eV in N high-resolution XPS spectra of COFs nanosheets. The thermal property, combustion behavior and mechanical performance of TPU naoncomposites are also investigated. Incorporation of COFs nanosheets into TPU contributes to char forming of TPU under nitrogen atmosphere and 14.3% decrease of peak heat release rate of TPU. Besides, the elongation at break, Young's modulus, and fracture strength of TPU nanocomposites increase sharply compared with that of neat one.

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Section: Results and Discussionmentioning

confidence: 83%

Novel Melamine/o-Phthalaldehyde Covalent Organic Frameworks Nanosheets: Enhancement Flame Retardant and Mechanical Performances of Thermoplastic Polyurethanes

Zhan

Feng

et al. 2017

ACS Appl. Mater. Interfaces

112

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“…High surface area nanoporous organic polymers with high nitrogen content have got tremendous interest of late because of their applications in gas storage, energy storage, semiconductors, catalysis, photocatalysis, and electrocatalytic properties. − These nitrogen-enriched framework materials have shown great potential to tune the applications, especially in gas storage and electrochemical supercapacitors. , The lone pair of electrons in nitrogen can act as a Lewis base and plays a very important role in electrochemical applications by manipulating the formation of the electrical double layers. − It remains a great challenge to synthesize nitrogen-enriched nanoporous polymers (NENPs) with high surface area by rationally designing at molecular scale using cheap reagents . The major challenges for synthesizing these materials are finding appropriate precursors and reaction conditions so that thermodynamically unfavorable high surface area nanoporous materials could be produced .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Enriched Nanoporous Polytriazine for High-Performance Supercapacitor Application

Chaudhary

Nayak

Muhammad

et al. 2018

ACS Sustainable Chem. Eng.

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Polytriazine with high nitrogen content (c.a. 50.5 wt %) has been synthesized by an ultrafast microwave-assisted method using melamine and cyanuric chloride. The nitrogen-enriched nanoporous polytriazine (NENP-1) has exhibited high specific surface area (maximum SABET of 838 m2 g–1) and narrow pore size distribution. The NENP-1 has been employed as electrode material for supercapacitor application. A maximum specific capacitance (Csp) of 1256 F g–1 @1 mV s–1 and 656 F g–1 @1 A g–1 are estimated from the cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) measurements, respectively, in a three-electrodes configuration. This Csp value is considered as very high for a nonmetallic system (organic polymer). Superior capacitance retention of 87.4% of its initial Csp was observed after 5000 cycles at a current density of 5 A g–1 and demonstrates its potential as an efficient electrode material for practical applications. To test this claim, an asymmetric supercapacitor device (ASCD) was fabricated. The Csp values of the device in the two-electrode configuration are 567 F g–1 @5 mV s–1 and 287 F g–1 @4 A g–1 in the CV and GCD measurements, respectively. The ASCD has shown superior energy density and power density of 102 Wh kg−1 and 1.6 kW kg–1, respectively, at the current density of 4 A g–1. The energy density is much higher than the best reported supercapacitors and also close to the commercial batteries. This indicates the material could bridge the gap between the commercial batteries and supercapacitors.

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“…From a chemical view, triazine known as a nitrogen-rich conjugated unit with electron withdrawing character may act as the redox active site for photocatalytic water splitting (Schwinghammer et al, 2013, 2014; Stegbauer et al, 2014). Given these properties, CTFs are widely employed as heterogeneous catalysts (Puthiaraj et al, 2016) and have shown attracting photocatalytic activities under visible light irradiation (Li et al, 2016b; Qu et al, 2016; Meier et al, 2017).…”

Section: Pops For Water Splittingmentioning

confidence: 99%

Porous Organic Polymers: An Emerged Platform for Photocatalytic Water Splitting

Zhang

Tang

et al. 2018

Front. Chem.

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Porous organic polymers (POPs), known for its high surface area and abundant porosity, can be easily designed and constructed at the molecular level. The POPs offer confined molecular spaces for the interplay of photons, excitons, electrons and holes, therefore featuring great potential in catalysis. In this review, a brief summary on the recent development of some current state-of-the-art POPs for photocatalytic water splitting and their design principles and synthetic strategies as well as relationship between structure and photocatalytic hydrogen or oxygen evolution performance are presented. Future prospects including research directions are also proposed, which may provide insights for developing POPs for photocatalytic water splitting with our expectations.

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A nitrogen-rich mesoporous polymer for photocatalytic hydrogen evolution from water

Cited by 28 publications

References 55 publications

Novel Melamine/o-Phthalaldehyde Covalent Organic Frameworks Nanosheets: Enhancement Flame Retardant and Mechanical Performances of Thermoplastic Polyurethanes

Novel Melamine/o-Phthalaldehyde Covalent Organic Frameworks Nanosheets: Enhancement Flame Retardant and Mechanical Performances of Thermoplastic Polyurethanes

Nitrogen-Enriched Nanoporous Polytriazine for High-Performance Supercapacitor Application

Porous Organic Polymers: An Emerged Platform for Photocatalytic Water Splitting

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