Visible-light driven degradation of tetracycline hydrochloride and 2,4-dichlorophenol by film-like N-carbon@N-ZnO catalyst with three-dimensional interconnected nanofibrous structure

Xiao, Chen; Xu, Xuran; Cui, Jian; Chen, Chuntao; Zhu, Xufei; Sun, Dongping; Qian, Jieshu

doi:10.1016/j.jhazmat.2020.122331

Cited by 40 publications

(11 citation statements)

References 36 publications

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“…Besides, the relative proportion of the peak associated with O v in spent 0.15Co-SiOx shows a reduction of 13.27% compared to that in 0.15Co-SiOx, which could be caused by the neutralization of O v during the catalytic processes. This 42 17.88 visible light/photocatalyst 1 g/L, 298 K N−carbon@N−ZnO-650 43 2.50 visible light/photocatalyst vis 300 W, 298 K, 0.3 g/L BFO-CN-WO 44 1.31 visible light/photocatalyst 2.5 g/L, vis 300 W modified iron-carbon 45 5.54 electro-Fenton catalyst pH 6. ) has extremely active electrons with parallel spins on unstable e g -orbitals, resulting in the release of these electrons from the de g -orbitals.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism

Lian

Roy

Kizilkaya

et al. 2020

ACS Appl. Mater. Interfaces

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Amorphous cobalt-inherent silicon oxide (Co-SiOx) was synthesized for the first time and employed as a highly active catalyst in the activation of peroxymonosulfate (PMS) for the rapid oxidation of 2,4-dichlorophenol (2,4-DCP). The characterization results revealed that the 0.15Co-SiOx possessed a high specific surface area of 607.95 m 2 /g with a uniform mesoporous structure (24.33 nm). The X-ray diffraction patterns indicate that the substituted cobalt atoms enlarge the unit cell parameter of the original SiO 2 , and the selected area electron diffraction pattern confirmed the amorphous nature of Co-SiOx. More bulk oxygen vacancies (O v ) existing in the Co-SiOx were identified to be one of the primary contributors to the significantly enhanced catalytic activation of PMS. The cobalt substitution both creates and stabilizes the surficial O v and forms the adequately active Co(II)−O v pairs which engine the electron transfer process during the catalytic activities. The active Co(II)−O v pairs weaken the average electronegativity of Co/Si and Co/O sites, resulting in the prevalent changes in final state energy, which is the main driving cause of the binding energy shifts in the X-ray photoelectron spectroscopy (XPS) spectra of Si and O among all samples. The increase of the relative proportion of Co(III) in the spent Co-SiOx probably causes the binding energy shifts of the Co XPS spectrum compared to that of the Co-SiOx. The amorphous Co-SiOx outperforms stable and quick 2,4-DCP degradation, achieving a much higher kinetic rate of 0.7139 min −1 at pH = 7.02 than others via sulfate radical advanced oxidation processes (AOPs), photo-Fenton AOPs, H 2 O 2 reagent AOPs, and other AOP approaches. The efficient degradation performance makes the amorphous Co-SiOx as a promising catalyst in removing 2,4-DCP or organic-rich pollutants.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism

Lian

Roy

Kizilkaya

et al. 2020

ACS Appl. Mater. Interfaces

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“…Afterward, the porous properties of ZIF-67/CC and hCoMo-LDH/CC samples were examined by N 2 adsorption–desorption experiments, and the results are shown in Figure f. One can see the existence of micropores in both samples because of their typical type I isotherms with significant adsorption at low relative pressures . The Brunauer–Emmett–Teller specific surface area (SBET) of ZIF-67/CC is calculated to be 427 m 2 g –1 .…”

Section: Resultsmentioning

confidence: 98%

“…One can see the existence of micropores in both samples because of their typical type I isotherms with significant adsorption at low relative pressures. 30 The Brunauer− Emmett−Teller specific surface area (SBET) of ZIF-67/CC is calculated to be 427 m 2 g −1 . This value is increased to 802 m 2 g −1 after the chemical etching treatment.…”

Section: Resultsmentioning

confidence: 99%

Template-Sacrificing Strategy for Three-Dimensional CoMo-Layered Double-Hydroxide Nanopolyhedra for Electrochemical Sensing of Nitrite

Chen

Cui

et al. 2021

ACS Appl. Nano Mater.

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Electrochemical sensing is a widely adopted technique for the detection of target molecules even at a trace concentration. The key component in an electrochemical sensor is the electrode, for which layered double hydroxides (LDHs) have received significant attention because of their compositional tunability. However, it is still challenging to achieve mass production of LDHs as electrodes with structural integrity and regularity. Here, using Co-based metal organic frameworks (ZIF-67) as the precursor, a template-sacrificing strategy is reported to synthesize hollow CoMo-LDH (hCoMo-LDH) nanopolyhedra, which was used as a self-supporting electrode for electrochemical sensing. Using nitrite as the target, our hCoMo-LDH/CC electrode exhibits an ultralow detection limit (0.01 μM), a wide linear range (1 to 1500 μM), and a striking sensitivity (1020 μA·mM–1·cm–2). Density functional theory calculations were employed to obtain a mechanistic understanding on the exceptional performance of the hCoMo-LDH nanopolyhedra resulted from the Mo doping. Furthermore, the electrode demonstrates excellent stability, strong anti-interference property, and good suitability in real water samples. Our work provides more opportunities for the design of self-supporting electrode in electrochemical sensing applications.

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“…Furthermore, more efforts were focused on the consideration of the substrate to enhance photocatalytic activity. As one of the most crucial photocatalytic material systems, carbon–based materials have been considered promising materials, due to their specific conductivity, stability, and changeable structures [ 29 ], such as the 3D nanofibrous structure of N–carbon@N–ZnO [ 30 ], hollow carbon fiber membrane with ZnO [ 31 ], 3D porous core–shell carbon fiber [ 32 ], Z–scheme carbon fibers@WO 3–x composites [ 33 ], and the carbon cloth of CoSe 2 @MoSe 2 core–shell structure [ 34 ]. Combining different carbon–based materials with photocatalysts reduced charge recombination efficiency and enhanced the transmission of the photogenerated electron.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks Meet Metallic Oxide on Carbon Fiber: Synergistic Effect for Enhanced Photodegradation of Antibiotic Pollutant

Zhu

Zhou

Zhang

et al. 2022

IJMS

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Photodegradation shows a potential strategy for alleviating the excessive antibiotics crisis. The synergistic effect of various metal compounds immobilized on conductive substrates has been considered for wastewater treatment. However, developing a facile and universal approach for rational design and enhancing photocatalytic properties has endured extreme challenges. Herein, we develop a strategy to facilitate the photocatalytic reactions by designing a composite architecture of ZIF–8 ligand binding to the in–situ synthesis ZnO seed layer on carbon fiber. In this architecture, the dissolution and release of the seed layer in the excessive 2–Methylimidazole methanol solution were used as the binder to enhance the interplay between organic ligand and substrate. As an evaluated system for antibiotic contaminants, the photodegradation of tetracycline hydrochloride was performed with a removal efficiency of 88.47% (TC = 50 mg/L, pH = 4, 0.08 g of photocatalyst, illumination within 100 min). Moreover, the photocatalyst exhibited a steady photocatalytic activity (75.0%) after five cycles. The present work demonstrated a strategy for enhancing the photocatalytic performances of carbon fiber and accordingly provided useful perception into the design of the synergistic structure.

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Visible-light driven degradation of tetracycline hydrochloride and 2,4-dichlorophenol by film-like N-carbon@N-ZnO catalyst with three-dimensional interconnected nanofibrous structure

Cited by 40 publications

References 36 publications

Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism

Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism

Template-Sacrificing Strategy for Three-Dimensional CoMo-Layered Double-Hydroxide Nanopolyhedra for Electrochemical Sensing of Nitrite

Metal–Organic Frameworks Meet Metallic Oxide on Carbon Fiber: Synergistic Effect for Enhanced Photodegradation of Antibiotic Pollutant

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