Metal organic framework derived one-dimensional porous Fe/N-doped carbon nanofibers with enhanced catalytic performance

Chen, Saisai; Li, Miaoqing; Zhang, Ming; Wang, Chaohai; Luo, Rui; Yan, Xin; Zhang, Hao; Qi, Junwen; Sun, Xiuyun; Li, Jiansheng

doi:10.1016/j.jhazmat.2021.126101

Cited by 44 publications

(10 citation statements)

References 62 publications

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“…The removal increased from 40% to 90% by increasing the TiO 2 nanofiber layer thickness from 10 µm to 29 µm; beyond 29 µm, no increase in the removal was noticed. Chen et al (2021) [129] studied hollow and porous Fe-doped PAN nanofibers for activating peroxymonosulfate (PMS) for achieving the removal of BPA. Electrospinning showed high effectiveness in immobilizing the nanoparticles by suppressing the agglomeration of nanoparticles and facilitating a uniform dispersion of nanoparticles, leading to an increase in catalytic sites.…”

Section: Cec Removalmentioning

confidence: 99%

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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In the past few decades, the role of nanotechnology has expanded into environmental remediation applications. In this regard, nanofibers have been reported for various applications in water treatment and air filtration. Nanofibers are fibers of polymeric origin with diameters in the nanometer to submicron range. Electrospinning has been the most widely used method to synthesize nanofibers with tunable properties such as high specific surface area, uniform pore size, and controlled hydrophobicity. These properties of nanofibers make them highly sought after as adsorbents, photocatalysts, electrode materials, and membranes. In this review article, a basic description of the electrospinning process is presented. Subsequently, the role of different operating parameters in the electrospinning process and precursor polymeric solution is reviewed with respect to their influence on nanofiber properties. Three key areas of nanofiber application for water treatment (desalination, heavy-metal removal, and contaminant of emerging concern (CEC) remediation) are explored. The latest research in these areas is critically reviewed. Nanofibers have shown promising results in the case of membrane distillation, reverse osmosis, and forward osmosis applications. For heavy-metal removal, nanofibers have been able to remove trace heavy metals due to the convenient incorporation of specific functional groups that show a high affinity for the target heavy metals. In the case of CECs, nanofibers have been utilized not only as adsorbents but also as materials to localize and immobilize the trace contaminants, making further degradation by photocatalytic and electrochemical processes more efficient. The key issues with nanofiber application in water treatment include the lack of studies that explore the role of the background water matrix in impacting the contaminant removal performance, regeneration, and recyclability of nanofibers. Furthermore, the end-of-life disposal of nanofibers needs to be explored. The availability of more such studies will facilitate the adoption of nanofibers for water treatment applications.

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Section: Cec Removalmentioning

confidence: 99%

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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“…Transmission electron microscopy (TEM) image verifies that the average diameter of FTO-E nanofiber is around 300 nm and the rough surface with tiny nanoparticles implies good crystallization, which is beneficial to increase active sites (Figure 1d). [31] High-resolution transmission electron microscope (HRTEM) image shows a clear lattice distance of 0.348 nm, corresponding to the (110) plane of FTO-E (Figure 1e). Scanning transmission electron microscopy-Energy dispersive X-Ray spectroscopy (STEM-EDX) elemental mapping of a single FTO-E nanofiber (Figure 1f-i) clearly reveals the uniform distributions of Fe, Ti and O elements.…”

Section: Resultsmentioning

confidence: 99%

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

Guo

Wang

et al. 2022

Angewandte Chemie

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We propose the pseudobrookite Fe2TiO5 nanofiber with abundant oxygen vacancies as a new electrocatalyst to ambiently reduce nitrate to ammonia. Such catalyst achieves a large NH3 yield of 0.73 mmol h−1 mg−1cat. and a high Faradaic Efficiency (FE) of 87.6 % in phosphate buffer saline solution with 0.1 M NaNO3, which is lifted to 1.36 mmol h−1 mg−1cat. and 96.06 % at −0.9 V vs. RHE for nitrite conversion to ammonia in 0.1 M NaNO2. It also shows excellent electrochemical durability and structural stability. Theoretical calculation reveals the enhanced conductivity of this catalyst and an extremely low free energy of −0.28 eV for nitrate adsorption at the presence of vacant oxygen.

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“…The involved ROS for BPA degradation was identified by quenching experiments (Figure a, Figure S19). According to the previous reports, methanol (MeOH) is a typical scavenger of SO 4 ·– and · OH, while tert -butyl alcohol (TBA) is only used for scavenging · OH. , When MeOH was added to the batch reactor as a scavenger, the rate k″ decreased from 0.0694 min –1 to 0.00403 min –1 . However, when TBA with the molar ratio of TBA/PMS = 1000 was added, the k″ decreased to 0.0523 min –1 , indicating that · OH made little contribution to the degradation of BPA, while SO 4 ·– played a dominant role.…”

Section: Results and Discussionmentioning

confidence: 99%

“…•− and • OH, while tert-butyl alcohol (TBA) is only used for scavenging • OH. 40,41 When MeOH was added to the batch reactor as a scavenger, the rate k″ decreased from 0.0694 min −1 to 0.00403 min −1 . However, when TBA with the molar ratio of TBA/PMS = 1000 was added, the k″ decreased to 0.0523 min −1 , indicating that • OH made little contribution to the degradation of BPA, while SO 4…”

Section: •−mentioning

confidence: 99%

MOF Derived Carbon Nanofibers Substrate Supported Polymeric Ultrafiltration Membrane for Efficient Removal of Trace Organic Contaminants

et al. 2022

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Efficient removal on trace organic contaminants (TrOCs) from a complicated water matrix is highly desired to improve the quality of discharged wastewater effluents. In this work, a sequential separation-catalysis membrane (SSCM) was designed by fabricating a poly(ether sulfone) ultrafiltration (UF) membrane via a traditional nonsolvent induced phase separation process on Co3O4/C nanofibers substrate, which was derived from electrospinning nanofibers of polyacrylonitrile/pyrolytic zeolite imidazolate frameworks-67. The resultant SSCM successfully integrated the functions of separation and catalysis, and enhanced the mass-transfer in the catalytic area. Notably, the SSCM exhibited above 99% catalytic degradation of bisphenol A (BPA) under the flux of 122.8 L m–2 h–1 and the unique design of integrated separation and catalysis dual function layers significantly accelerated the kinetics of BPA degradation, which was 19.77 times higher than that of series connected processes of UF membrane and bare catalytic substrate (BCS). Furthermore, as demonstrated by filtering the water matrices containing humic acid and TrOCs (BPA), the BPA removal efficiency of SSCM had increased by 20% and 73% and continued to grow compared to the catalysis followed by ultrafiltration mode and BCS. This work provides a promising design on enhanced removal of TrOCs for water purification and wastewater reuse.

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Metal organic framework derived one-dimensional porous Fe/N-doped carbon nanofibers with enhanced catalytic performance

Cited by 44 publications

References 62 publications

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

MOF Derived Carbon Nanofibers Substrate Supported Polymeric Ultrafiltration Membrane for Efficient Removal of Trace Organic Contaminants

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Metal organic framework derived one-dimensional porous Fe/N-doped carbon nanofibers with enhanced catalytic performance

Cited by 44 publications

References 62 publications

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe2TiO5Nanofibers with Abundant Oxygen Vacancies

MOF Derived Carbon Nanofibers Substrate Supported Polymeric Ultrafiltration Membrane for Efficient Removal of Trace Organic Contaminants

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Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies