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Yueyue Li et al.
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Mei-Mei Wang et al.
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CHEMICAL ENGINEERING JOURNAL
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Yihui Li et al.
Summary: In this study, bimetallic Fe/Mn-loaded hydroxyl-rich biochar (FeMn-OH-BC) is synthesized to activate peroxymonosulfate (PMS) through nonradical-dominated pathways for degrading organic pollutants. The FeMn-OH-BC exhibits excellent catalytic activity at a wide range of pH conditions and is not inhibited by various anions. Electron paramagnetic resonance measurements and quenching tests confirm that O-1(2) is the major reactive oxygen species generated from FeMn-OH-BC based PMS activation.
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Xin Guo et al.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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Qingqing Li et al.
Summary: In this study, a novel N-doped porous carbon catalyst with multiple active sites was successfully synthesized and showed excellent catalytic activity towards tetracycline hydrochloride (TCH). The catalytic performance of the catalyst, named Co3O4/NC, in the peroxymonosulfate system was significantly better than other catalysts. The removal efficiency of TCH reached 96.4% within 30 minutes, and remained above 97% over a wide pH range of 5-9, with 71% of total organic carbon (TOC) being eliminated. The EPR analysis indicated that the degradation of TCH was mainly attributed to the coexistence of SO4•- and O-2. The degradation pathways of TCH were elucidated based on theoretical calculation and HPLC-TOF-MS2 data.
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Yue Zhao et al.
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Nguyen T. Dung et al.
Summary: In this work, NiCo-layered double hydroxide (NiCo-LDH) was synthesized as an effective peroxymonosulfate (PMS) activator for the degradation of organic pollutants in wastewater. The NiCo-LDH showed excellent catalytic performance and stability.
ENVIRONMENTAL RESEARCH
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(2022)
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Chunli Song et al.
Summary: This research reports a method for fabricating Co3O4-CeO2 nanocomposites by changing the loading direction, and discovers that they exhibit unexpectedly high activity and stability in peroxymonosulfate-based Fenton-like reactions. The generated oxygen vacancies serve as new active sites to facilitate the cleavage of peroxide bond, resulting in improved catalytic activity. This provides a new direction for enhancing the catalytic activity of nanocomposite catalysts in various scenarios, including environmental remediation and energy applications.
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Dingyang Chen et al.
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Summary: This study presents a novel free-standing electrode with well-developed porous and hollow structure for efficient H2O2 electroreduction, utilizing a synergetic strategy to optimize Pd and Co3O4 design. The 3D hollow structure design offers a high specific area with exposed catalytic activity sites and restricts the aggregation of nanoparticle catalysts, resulting in improved catalytic performance.
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Yongbing Xie et al.
Summary: Metal-free heteroatom doped nanocarbons, such as N, S co-doped hollow carbon microspheres, have been studied as promising alternatives to metal-based materials for catalytic ozonation of aqueous organic contaminants. This study investigated the synthesis and catalytic performance of N- and S-doped hollow carbon microspheres and found that the N-2-annealed NSCs exhibited higher catalytic activity compared to single-walled carbon nanotubes. The activity enhancement was attributed to the synergistic effect between graphitic nitrogen and thiophene sulfur, as well as the nanoconfinement effects provided by the hollow structure within the microspheres.
CHINESE CHEMICAL LETTERS
(2022)
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Yu Liang et al.
Summary: A nitrogen-doped porous carbon-coated CoFe2O4 core-shell composite (CoFe2O4 @NPC) was synthesized and investigated as a catalyst for activating persulfate (PMS) in the degradation of organic dyes. The composite exhibited the highest catalytic activity after calcination at 600°C and showed excellent recyclability and stability. The activation mechanism of PMS and the degradation mechanism of dyes were also explored.
JOURNAL OF ALLOYS AND COMPOUNDS
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Lu Zhao et al.
Summary: This study focused on the efficient recycling of agricultural chestnut shell waste by preparing alkaline-activated biochar. The biochar showed excellent efficiency and selectivity in degrading pollutants through Fenton-like activation. The study identified both radical and non-radical pathways, with surface ketonic groups being the main reactive sites for non-selective radical production. The findings offer a promising strategy for recycling chestnut shell waste and provide insights for environment-friendly water purification.
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Yan Zhou et al.
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Chengji Xu et al.
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Na Song et al.
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Na Song et al.
Summary: The confinement of Fe-0 nanoparticles inside N-doped carbon nanotubes using a wrapping-pyrolysis strategy results in Fe@NC NTs with enhanced peroxidase-like activity. The optimized void structure in the Fe@NC NTs improves the affinity with peroxidase substrates and achieves excellent catalytic efficiency. Additionally, a total antioxidant capacity sensing platform is developed based on this efficient peroxidase-like system.
ANALYTICAL CHEMISTRY
(2022)
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Guixiang Yi et al.
Summary: In this study, a novel method was used to synthesize a three-dimensional interconnected N-doped carbon nanosheet framework coupled with cobalt oxide nanoparticles. The synthesized material exhibited high efficiency in the degradation of p-nitrophenol by activating peroxymonosulfate, achieving a removal efficiency of about 98%.
APPLIED SURFACE SCIENCE
(2022)
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Electrochemistry
Yi Zhang et al.
Summary: In this study, an effective electrochemical sensor based on Co3O4/C-derived ZIF-67 MOF was developed for ultrasensitive determination of trace quercetin. The Co3O4/C porous polyhedron was carefully examined using various characterization techniques. Differential pulse anodic stripping voltammetry was used to analyze quercetin under optimized conditions. The sensor exhibited a wide linear range, high sensitivity, and low detection limit, as well as excellent selectivity, repeatability, and reproducibility. Furthermore, the sensor was successfully applied for the determination of trace quercetin in human urine and serum samples.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Review
Engineering, Chemical
P. V. Nidheesh et al.
Summary: This article extensively discusses various aspects of sulfate radicals based advanced oxidation processes (SR-AOPs) in treating textile wastewaters, including activation processes, reactive molecules and radicals species, performance evaluations, comparisons with other AOPs, and studies on experimental scales.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
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Chemistry, Multidisciplinary
Wenhao Tang et al.
Summary: The article presents a study on a high-efficiency bifunctional oxygen catalyst Co3O4@ND-CN, which demonstrates excellent performance and stability in metal-air and lithium-oxygen batteries. The catalyst, with its rich defects and structure, as well as the synergy between Co3O4 and ND-CN, offers important insights for the development of renewable energy conversion and storage systems.
Article
Chemistry, Physical
Lele Zhao et al.
Summary: This study investigates the effect of different crystal plane exposures of Co3O4 nanomaterials on the activation of peroxymonosulfate (PMS) in water. It was found that Co3O4-NR with (110) plane exposure showed superior activity in efficiently removing bisphenol A (BPA), with singlet oxygen (O-1(2)) playing a dominant role in the degradation process. The study also explored the evolution of lattice defects (oxygen vacancies) during PMS activation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
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Tingting Zhao et al.
Summary: This study proposes a novel solution to improve the catalytic activity, reduce the leaching of toxic ions, and enable rapid separation in PMS-based Fenton-like reactions. It involves encapsulating Fe3O4 and Prussian blue analogue into a polypyrrole shell to construct a double-yolk egg-like nanoreactor. The results demonstrate that the nanoreactor exhibits enhanced catalytic performance, reduced leaching of cobalt ions, and efficient magnetic separation.
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Yongxin Lei et al.
Summary: Excessive emissions of cow manure have caused environmental pressure and challenges to the livestock industry. This study investigates the use of biochar-based composites as catalysts for degrading carbamazepine and finds that higher pyrolysis temperature leads to better catalytic ability. The findings provide a new strategy for using cow manure as functional catalysts and offer prospects for designing efficient biochar-based catalysts for environmental remediation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
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Chemistry, Physical
Yingdong Wu et al.
Summary: Effective control over the manufacturing process of Ov-Co3O4@PPy, which consists of Co3O4 with rich oxygen vacancy defects and polypyrrole coating, enhances the capacitive and cyclic properties of the material. The specific capacitance of Ov-Co3O4@PPy is three times higher than that of Co3O4 without reduction treatment and unwrapped PPy. Moreover, the Ov-Co3O4@PPy//AC asymmetric supercapacitor exhibits a high specific energy density of 74.55 Wh kg(-1) and a capacitance retention rate close to 110% after 10,000 cycles.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Lijing Peng et al.
Summary: The study demonstrates that the pyridinic N-Co binding in Co3O4@NSC serves as the main catalytic site for PMS activation, and the presence of Cl can enhance reaction rates and increase the production of HOCl.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
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Jie Sun et al.
Summary: The study constructed a Co3O4/Bi2WO6 composite to activate PMS for the degradation of ciprofloxacin under visible light irradiation, showing excellent degradation performance. This work not only provides an approach to fabricate heterostructures but also indicates a potential environment remediation alternative for the efficient removal of recalcitrant organic compounds from wastewaters.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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Abdellah Ait El Fakir et al.
Summary: This study explores new chemical strategies for coating hematite sand with conductive polymers to enhance persulfate activation performance. It was found that conjugated polymers act as activators and electronic mediators to promote the conversion of Fe (III) to Fe (II), providing necessary electron transfer. The protective polymer layers prevent metal ion leaching, mitigate catalyst deactivation, enable pH-insensitive persulfate activation, and increase chemical stability, offering an innovative way to remove multiple pollutants in wastewater.
APPLIED CATALYSIS A-GENERAL
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Abdellah Ait El Fakir et al.
Summary: In this study, conductive polymers PANI and PPy were successfully utilized as catalysts for degrading organic pollutants. Additionally, the immobilized PANI and PPy inside alginate membrane formed a stable hydrogel beads catalyst with excellent catalytic properties and stability.
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Chaohai Wang et al.
Summary: A novel 0D-1D hybrid nanoarchitecture FeCo@N-C yolk-shell nanoreactors were reported in this study as advanced catalysts for Fenton-like reactions. These nanoreactors exhibited excellent performance for pollutant removal and showed good cycling stability.
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