CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Jing Dai,Ziqian Wang,Aoxue Zhu,Yuefei Ji,Zhe Kong,Tianming Cai,Dahu Ding
Source-separation and treatment of urine are recognized as promising strategies to recover nutrients, as well as reduce the stress of terminal wastewater treatment plants. As a ubiquitous constituent of urine, NH 4 + has been demonstrated to induce the generation of nitro-byproducts in sulfate radical (SO 4 •− ) dominated oxidation processes. In this work, wheat straw derived biochar (BC X , X represents the pyrolysis temperature) was prepared and adopted to eliminate sulfadiazine (SDZ) and its main human metabolite N 4 -acetyl-sulfadiazine (NSDZ) from hydrolyzed urine by coupling with periodate (PI). Specifically, BC 800 /PI process achieved excellent SDZ (0.190 h −1 ) abatement, which was more efficient than NSDZ. HCO 3 − and NH 4 + significantly inhibited the removal processes whilst Cl − showed neglected effect. Both in situ and ex situ analysis excluded the dominant role of •OH, 1 O 2 , O 2 •– and/or •IO 3 . Instead, electron-transfer regime driven by the high potential BC 800 -PI* complexes played a significant role. Interestingly, BC 800 /PI and CoFe 2 O 4 /peroxymonosulfate (PMS) (a typical SO 4 •− -dominated oxidation process) exhibited comparable removal efficiencies towards SDZ. Four nitro-byproducts were identified in CoFe 2 O 4 /PMS process but negligible in BC 800 /PI process during SDZ treatment, revealing the merit of BC 800 /PI process. Eventually, the toxicity prediction and bactericidal experiments further implied that BC 800 /PI process was eco-friendly. This study proposed a heterogeneous BC 800 /PI process for the treatment of source-separated urine and comprehensively demonstrated the advantages of its low costs and environmental risk.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Adeel Ahmed,Muhammad Usman,Zhijian Ji,Muhammad Rafiq,Raza Ullah,Bing Yu,Youqing Shen,Hailin Cong
In this work, an environmentally friendly reduced graphene oxidized supported cobalt ferrite (CFO/rGO) catalyst was constructed using a hydrothermal technique to heterogeneously activate peroxymonosulfate (PMS) and utilized for the degradation of sulfamethoxazole (SMX) antibiotic in aqueous solution. The results exhibited that the complete degradation of SMX was achieved in 25 min under optimal conditions ([SMX] = 8.0 mg/L, [CFO/rGO-30%] = 0.5 g/L, [PMS] = 5.0 mM, pH = 7.0) in the presence of CFO/rGO-30%/PMS with a rate constant of 0.3076 min ˗1 , which was roughly 6.08 times higher compared to the CoFe 2 O 4 /PMS system (0.0506 min ˗1 ). The enhanced degradation of SMX in the CFO/rGO-30%/PMS system might be attributed to the large surface area of the CFO/rGO-30% (98.11 m 2 /g) catalyst compared to the pristine CoFe 2 O 4 (24.31 m 2 /g), which increased the availability of active sites for PMS activation . Furthermore, the influence of pivotal reaction parameters and interfering anions on SMX mineralization was also scrutinized. The formation of free radicals (SO 4 •− , • OH, and 1 O 2 ) was established through quenching experiments and electron paramagnetic resonance analysis. The degradation mechanism of SMX was speculated based on the identification of degradation intermediates and X-ray photoelectron spectroscopy spectral analysis. Mechanistic investigations suggested that the transition of Co 2+ /Co 3+ and Fe 3+ /Fe 2+ pairs on the catalyst surface was responsible for the PMS activation, and the SMX degradation was accomplished through radical and non-radical pathways. Furthermore, CFO/rGO-30% exhibited high stability after four consecutive cycles and maintained catalytic activity . Finally, the developed CFO/rGO-30% catalyst exhibited promising potential for the purification of SMX polluted water.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Wenpeng Jiang,Wenli Zhu,Qingli Yang,Wei Wu,Xiudan Hou
An electrochemical/colorimetric dual-model sensor was developed for the specific detection of aflatoxin B1, utilizing the high catalytic activity and magnetic separation properties of CoFe 2 O 4 @Au along with the conformational alterations in the hairpin DNA structure. The CoFe 2 O 4 @Au nanocomposite demonstrated excellent peroxidase-like activity, characterized by the relatively low Michaelis constant ( K m = 0.14 mM and 0.94 mM) and the relatively high reaction rate ( V max = 4.43 × 10 −8 M·s −1 and 9.01 × 10 −8 M·s −1 ). Besides, the visualization results could be obtained using a smartphone in colorimetric mode. The detection linear ranges of the electrochemical workstation, ultraviolet-visible spectrophotometer, and smartphone were 0.001–100 ng mL −1 , 0.05–100 ng mL −1 , and 0.1–100 ng mL −1 , respectively, with corresponding limits of detection were 0.34 pg mL −1 , 0.016 ng mL −1 , and 0.043 ng mL −1 . Furthermore, the matrix effect values of these methods were 91.03 %–112.96 % in peanut, corn, and wheat. This work provided a new direction to explore dual-mode sensor to improve the detection accuracy in real samples.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Yun-Feng Zhu,Fu-An He,Dong-Dong Mai
Superhydrophobic electrospun films for oil–water separation, particularly those with multiple functions such as magnetism, catalysis, and piezoelectricity, have received widespread attention. In this work, a novel electrospun superhydrophobic magnetic CoFe2O4@TiO2/polyvinylidene fluoride (PVDF) composite film was fabricated. Firstly, a CoFe2O4@TiO2 hybrid filler was prepared by a simple and effective solvothermal method, and its structure and magnetism were confirmed by different characterization techniques. Secondly, the electrospun CoFe2O4@TiO2/PVDF composite film was prepared and then modified with trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane (HFDS) to form the electrospun HFDS-CoFe2O4@TiO2/PVDF composite film. The resulting HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was found to be superhydrophobic and could achieve oil–water separation by gravity filtration and direct absorption, with absorption capacities for valorous oils ranging from 7.7 g g−1 to 8.2 g g−1. The crystallinity degree of the polar piezoelectric β- and γ-form crystals of PVDF in the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was 25.1%, whereas the corresponding value of the pure PVDF solid film was only 14.3%. In addition, the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film exhibited a magnetization strength of 0.69 emu g−1 at 20 000 Oe and could catalyze the degradation of Sudan Red dye. The multi-functional CoFe2O4@TiO2/PVDF composite film demonstrates its potential for various applications in oil–water separation and other fields.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Hao Cai,Yifei Niu,Tianyuan Guan,Yin Zhang,Zichuan Ma
The intimate coupling of photocatalysis and biodegradation (ICPB) technology has received much attraction because of the advantages of both photocatalytic reaction and biological treatment. In this study, ZnO–CoFe 2 O 4 @BC (ZCFC) with p-n heterojunction was prepared and used in an ICPB system to degrade metronidazole (MNZ) wastewater. The microstructure, morphology, and optical behavior of heterojunctions in ZCFC were investigated using SEM, XRD , UV–vis, FTIR, and XPS techniques. The results showed that ZCFC inherited the advantages of bamboo biochar's large pore size, and its large pore structure could provide a habitat for bacterial colonization in ICPB, thus shortening the internal mass transfer distance. The degradation of MNZ and chemical oxygen demand (COD) by the ICPB system was 86.8% and 58.5%, respectively, which was superior to single photocatalysis (72.5% for MNZ and 43.8% for COD) and single biodegradation (23.5% for MNZ and 20.1% for COD). In ICPB, photocatalysis and biodegradation showed a synergistic effect in the removal of MNZ, and the order of the major reactive oxygen species (ROS) leading to reduced toxicity of MNZ to the biofilm was •OH > h + > O 2 • - . High-throughput sequencing analysis showed continuous evolution of biofilm structures in ICPB enriched a variety of functional species, among which the electroactive bacteria Alcaligenes and Brevundimonas played an important role in the degradation of MNZ. In this study, we investigated the possible mechanism of photocatalytic and microbial synergistic degradation of MNZ in the ICPB system and proposed a new technology for degrading antibiotic wastewater that combines the advantages of photocatalysis and biodegradation.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jieli Guo,Shanmei Tu,Limin Li,Xiujing Xing,Wei Xiong,Hao Li
Combining two metal–organic frameworks (MOFs) with different compositions and structures is an effective way to grow MOF-on-MOF materials. MOF-on-MOF-derived Fe2O3/CoFe2O4 nanocomposites were constructed by epitaxial growth method and high-temperature heat treatment. The morphology and structure of Fe2O3/CoFe2O4 were modulated by varying different organic ligands, and their effects on the detection properties of Pb2+, Cu2+, Hg2+, and Cd2+ were explored. Co3O4 microspheres acted as stabilizing seeds, and typical samples of Fe2O3/CoFe2O4-2 nanocomposites showed spherical nanoparticles of the core–shell type with an average diameter of about 55–60 nm. Meanwhile, compared with individual MOF derivatives, the surface of MOF-on-MOF derivative materials had higher electrical conductivity and active surface area by high-temperature heat treatment, thus promoting efficient adsorption of a wide range of heavy metal ions (HMIs). Furthermore, Fe2O3/CoFe2O4-2/GCE exhibited excellent electrochemical detection performance for the simultaneous detection of Pb2+, Cu2+, Hg2+, and Cd2+ with low limit of detection (LOD) of 2.98, 8.56, 4.44, and 5.40 nM, respectively. By two-by-two and three-by-three assays, promoting and inhibiting effects of different HMIs were observed on the target ions. This work is significant for the development of high-performance MOF-on-MOF-derived Fe2O3/CoFe2O4 nanocomposites for real-time environmental monitoring.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
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IF 5.951
Qingguo Chi,Tao Ma,Yue Zhang,Qingguo Chen,Changhai Zhang,Yang Cui,Tiandong Zhang,Jiaqi Lin,Xuan Wang,Qingquan Lei
The high-performance energy-storage dielectric capacitors are increasingly necessary for the development of miniaturization, integration, and multifunctionality of electronic devices. Here, we describe a new strategy of a sandwich-structured polymer-based dielectric composite with inorganic fillers of semiconductor@perovskite hybrid fibers, and this novel dielectric composite possesses an excellent energy-storage performance at low electric field. It is of crucial importance to achieve hybrid nanofibers of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT–BCT NFs) deposited by CoFe2O4 nanoparticles (CFO; hereafter, CFO@BZT–BCT NFs in short). Herein, the BZT–BCT NF ceramic has the typical perovskite structure and large dielectric constant, which is used as the ceramic-support for CFO. Meanwhile, the semiconductor of CFO works as the electron donor to offer a great interfacial polarization for the improvement of overall dielectric constant of the composite. Remarkably, the trilayer structure is composed of outer poly(vinylidene fluoride) (PVDF) layer to improve the breakdown strength and middle CFO@BZT–BCT NFs–PVDF nanocomposite to enhance the dielectric properties. The BZT–BCT NFs were prepared by electrospinning, and then the CFO@BZT–BCT NFs were gained by hydrothermal method. Furthermore, the BZT–BCT NFs and the CFO@BZT–BCT NFs were modified by polydopamine (PDA). Finally, the sandwich-structured composites were gotten by a typical process of solution-casting and hot-pressing. The influences of fillers’ volume fraction and type on the performances of composites have been systematically investigated. The PVDF/CFO@BZT–BCT NFs–PVDF/PVDF composite (P/CFO@BZT–BCT NFs–P/P) exhibits an outstanding energy density performance under a low electric field. The trilayer structure composite with an optimized content of nanofibers possesses an excellent dielectric performance (dielectric constant ∼20.1 at 100 Hz) and great energy-storage performance (electric displacement ∼10.7 μC/cm2, discharged energy density ∼11.3 J/cm3, and efficiency ∼55.5% at a low electric field of 350 kV/mm). This work paves the way for potential applications in integrated electronic devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Adeel Ahmed,Muhammad Usman,Bing Yu,Fengyuan Gao,Youqing Shen,Hailin Cong
The unintended leakage of endocrine-disrupting bisphenol A (BPA) from different industries into the aquatic environment has posed a severe threat to aquatic lives and human health. Herein, we explored a hydrothermal method to synthesize superparamagnetic β-cyclodextrin-cobalt ferrite (β-CD-CoFe 2 O 4 ) catalyst for the selective capturing and efficient degradation of BPA through heterogeneous activation of peroxymonosulfate (PMS). The as-prepared catalysts were systematically characterized through multi-techniques to explore the relationship between their catalytic performance and material properties. Results showed that, in β-CD-CoFe 2 O 4 /PMS system, the degradation rate of BPA reached 99.23% in 60 min with a rate constant of 0.0708 min −1 , approximately 16.09 times than CoFe 2 O 4 /PMS system (0.0044 min −1 ). Specifically, the large surface area and availability of more reactive sites of β-CD-CoFe 2 O 4 boosted the activation process of PMS compared to pristine CoFe 2 O 4 , thus enhancing the degradation of BPA. Meanwhile, the effect of different operational parameters and co-existing anions on BPA degradation were also investigated. The generation of free radicals ( S O 4 ∙ - , ∙ O H , O 2 ∙ - , a n d 1 O 2 ) in the β-CD-CoFe 2 O 4 /PMS system liable for reducing BPA was corroborated through electron paramagnetic resonance analysis and quenching experiments. The possible degradation pathways of BPA were proposed based on the identification of reaction intermediates formed during the mineralization process. In brief, the findings of this study suggested that β-CD-CoFe 2 O 4 is an efficient and environmentally friendly catalyst that facilitated the degradation of BPA through PMS activation. Moreover, the excellent magnetic separation, stability, and reusability of the β-CD-CoFe 2 O 4 catalyst make them promising candidates for their water purification applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Jinfan Yang,Zhengqing Li,Xiaoru Niu,Ji Xu,Ning Shang,Wenxi Lei,Hao Wu
Developing a sustainable, efficient, and cost-effective heterogeneous catalyst for advanced oxidation processes is challenging in wastewater remediation. Herein, chitosan intercalated CoFe-layered double hydroxide was first employed as a precursor to fabricate a novel CoFe 2 O 4 -CoO/N-doped carbon composite (CoFe-LDO/NC) via a simple “in-situ coprecipitation-calcination” method. The resulting CoFe-LDO/NC was carefully characterized and employed to degrade tetracycline (TC) with the assistance of peroxymonosulfate (PMS). Under the optimum conditions (30 mg L −1 TC, 0.4 g L −1 catalyst, 0.4 g L −1 PMS, pH = 5), the degradation efficiency and mineralization degree reached 97.6% and 60.7% within 30 min, respectively. The superior activity of CoFe-LDO/NC was ascribed to its well-dispersed metal nanoparticles , large specific surface area (230.7 m 2 g −1 ), hierarchical porous structure, and intensified electron transfer efficiency. The quenching test revealed that both the sulfate radicals and singlet oxygen were the dominant active species in the system. The degradation mechanism and TC evolution route were speculated by X-ray photoelectron spectroscopy and liquid chromatography-mass spectrometry. Escherichia coli growth inhibition test exhibited remarkable detoxification of TC solution after degradation. Moreover, CoFe-LDO/NC could be easily collected by magnetism , and 94.3% of its original activity was retained after five cycles. This work offers a green and scalable approach for the rational design of heterogeneous Co-based catalysts for degradation.
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 14
·10884-10895
·
IF 4.6
Yanling Wu,Xi Tang,Hui He,Qingyuan Luo,Wenkai Fu,Qinggao Hou,Haijun Zhang
Developing high-performance, multifunctional non-precious metal catalysts is essential for enhancing the efficiency of future energy utilization. In this study, four types of magnetic, recyclable Co3Fe7/CoFe2O4 incorporated porous carbon composite catalysts were synthesized using citric acid as the carbon source and ammonium chloride (NH4Cl) as the salt medium. Iron and cobalt salts, in four different proportions, were uniformly incorporated using freeze-drying technology and subsequently processed through in situ calcination. Among the synthesized catalysts, Co3Fe7/CoFe2O4@NC-1, demonstrated outstanding catalytic reduction performance, with a reaction rate constant (k) of 0.031 min−1, along with excellent cycle stability for 4-NP. The resulting Co3Fe7/CoFe2O4@NC-3 catalyst exhibited good ORR activity in an alkaline medium (Eonset = 0.99 V, E1/2 = 0.83 V, JL = −5.2 mA cm−2), along with long-term durability and resistance to methanol poisoning. These hybrid materials hold promise as non-precious metal electrocatalysts for fuel cell ORRs and introduce a new class of catalytic candidates for 4-NP reduction.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
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IF 6.551
Xinran Li,Zhehua Liu,Yongjuan Zhu,Lan Song,Zhaojun Dong,Shu Niu,Cong Lyu
Magnetic CoFe 2 O 4 is a promising heterogeneous catalyst with great separation and catalytic performance on peroxymonosulfate (PMS) activation. However, for extremely recalcitrant organic pollutants (e.g. Benzotriazole (BTA)), CoFe 2 O 4 /PMS system exhibits much low catalytic performance and high metal ion leaching . As such, CoFe 2 O 4 supported on three-dimensional graphene aerogels (CoFe 2 O 4 @3DG) was synthesized via facile hydrothermal method. It turns out that 3DG as supporter significantly enhances specific surface area, redox activity and electron transfer of composite. The degradation rate constant in the CoFe 2 O 4 @3DG/PMS system (0.0203 min −1 ) is 15 times higher than that in the CoFe 2 O 4 /PMS system (0.0013 min −1 ). It results from synergistic activation of PMS by CoFe 2 O 4 and 3DG to generate multiple reactive oxygen species (•OH, SO 4 − •, O 2 − • and 1 O 2 ). Particularly, high graphitization structure and low oxygen groups content of 3DG facilitate PMS adsorption on its surface and electron transfer from BTA to PMS. Ultimately, BTA is degraded into CO 2, NH 3 and intermediates through benzene and triazole ring-opening reactions. Moreover, CoFe 2 O 4 @3DG/PMS system displays good stability and recyclability . Therefore, this study provides a new way to improve CoFe 2 O 4 activity for extremely recalcitrant organic pollutants degradation and new insights into synergistic activation of PMS by CoFe 2 O 4 and 3DG, which further advances cobalt-based catalysts in heterogeneous catalysis.
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高影响因子
Energy Technology
·
2026
·Vol. 14
·期 8
·e70612
·
IF 3.6
Jianguang Jia,Yue Cui,Chunfeng Shi,Haijun Hao
Developing a sustainable and cost-effective counter electrode (CE) material with high catalytic activity is of significant importance for quantum dot-sensitized solar cells (QDSSCs). In this work, by using the industrial residue material of sulfonated asphalt as the carbon precursor, we prepared a CoFe/CoFe 2 O 4 embedded N, S-doped carbon hybrid (CoFe/CoFe 2 O 4 @C) and applied to the CE of QDSSC. Structure analyses indicated that CoFe/CoFe 2 O 4 @C has a porous structure with large surface area. Electrochemical investigations revealed that the CoFe/CoFe 2 O 4 @C possesses high catalytic activity for polysulfide reduction. Consequently, CdSe QDSSC based on CoFe/CoFe 2 O 4 @C CE achieved a high power conversion efficiency (PCE) of 6.37%, significantly superior to the commonly used PbS CE (5.4%). This study provides a sustainable strategy for converting the industrial residue material of asphalt into a low-cost and high-performance CE material for QDSSC.
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