CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2022
·Vol. 101
·期 6
·3262-3272
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IF 2.5
Dongmei Jia,Jia Guo,Jing Li,Yongzheng Duan
The composite of CuO coated MIL-101(Fe) (CuO@MIL-101(Fe)) was successfully prepared using a one-pot hydrothermal technology. X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Brunauer–Emmett–Teller (BET), and TG technologies were used to characterize its structural, morphological, and physicochemical properties. CuO@MIL-101(Fe) exhibited a better pH adaptivity, a faster removal ratio of 95.8% for glyphosate within 10 min at pH 7, and a higher selectivity of adsorption capacity, even reaching 231.6 and 233.5 mg g −1 with coexisting Cl − (10 mmol L −1 ) and SO 4 2− (10 mmol L −1 ). The enhanced adsorption performances of CuO@MIL-101(Fe) may be caused by Cu forming a coordination interaction with glyphosate. A possible mechanism of glyphosate removal was discussed on the basis of the FTIR and X-ray photoelectron spectroscopy (XPS) analysis. CuO@MIL-101(Fe) composite would be more favourable to capture glyphosate from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Ting Chen,Zhiliang Zhu,Hua Zhang,Xiaolin Shen,Yanling Qiu,Daqiang Yin
The study on the removal of refractory veterinary antibiotic florfenicol (FF) in water is still very limited. In this study, an efficient Fenton-like catalyst was developed by synthesizing a series of Cu-based multi-metal layered double hydroxides (CuNiFeLa-LDHs) to degrade FF in aqueous solution. In the experiments, the screened CuNiFeLa-2-LDH with the molar ratio of La3+/(Fe3+ + La3+) = 0.1 exhibited high catalytic activity, achieving almost complete degradation of 5 mg L–1 FF under 5 mmol L–1 H2O2 conditions. The mechanisms revealed that the enhanced catalytic performance was ascribed to the existence of Ni which accelerated the electron transfer rate and La which served as a Lewis acidic site to provide more reactive sites in this Cu-dominated Fenton-like reaction, further generating •OH, •O2–, and O21 as active species to attack pollutants directly. Interestingly, the catalyst showed a wide pH adaptability and little release of copper ions to the solution. The regenerated CuNiFeLa-2-LDH is demonstrated to be a stable and reliable material for florfenicol degradation.
研究领域:
环境科学
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催化化学
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兽医学
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DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2024
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IF 2.2
Liping Wei,Kexin Zhou,Hui-qiang Li,Ping Yang,Baicang Liu
Most of the materials studied as catalysts in the electro-Fenton system are variants of iron oxide or iron hydroxide. However, iron-based catalysts often exhibit weak catalytic capabilities under neutral and alkaline conditions. In this work, we synthesized three cobalt based bimetallic oxides, Co2CuOx, Co2AlOx, and Co2NiOx, using hydrothermal method and evaluated them as catalysts for the heterogeneous electro-Fenton system to remove 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) and Methylisothiazolinone [2-methyl-4-isothiazolin-3-one] (MIT). Co2NiOx has the highest catalytic degradation activity for HEDP, and Co2CuOx has the best catalytic degradation effect for MIT. Based on characterization results of the catalysts, the reasons for the differences in the pollutant removal efficiency were analysed, and the optimal pH for the three cobalt based oxides to remove HEDP and MIT was investigated. The results showed that the optimal pH values of the three cobalt based bimetallic oxides are not only influenced by the second metal type, but also by the properties of pollutants. Therefore, suitable cobalt based catalysts can be selected based on the different properties of pollutants, or the composition of cobalt based catalysts can be adjusted to meet the different pH requirements of target wastewater. The three cobalt based bimetallic oxides exhibited good degradation of HEDP and MIT under neutral conditions, which to some extent solved the problem of narrow pH range in the practical application of the electro-Fenton process.
研究领域:
环境科学
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催化材料
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Haoyang Huang,Yanxiao Si,Jiajun Zou,Jiawei Li,Yongjie Li,Wenxin Huo,Haichuan Zhang,Yingjie Li,Ji Li
The H*-mediated electro-Fenton system, a novel byproduct-free H 2 O 2 activation technology, faces economic and universality challenges. This study fabricated a non-noble nickel-based catalyst to replace palladium (Pd), constructing a sandwich-structured NiO/oxidized carbon black electrode (SE-NiO/OCB) enriched with three-phase interfaces (TPI) for tetracycline (TC) removal. SE-NiO/OCB demonstrated efficient catalysis of atomic H* generation, achieving a significantly higher ·OH exposure of 19.18 × 10 −12 M·s compared to SE-OCB (5.37 × 10 −12 M·s). Additionally, the SE-NiO/OCB exhibited a remarkable TC removal efficiency of 96.7 % within 90 min, far exceeding SE-OCB (55.9 %). By leveraging H + /H 2 O as H* sources, the SE-NiO/OCB maintained ≥ 83.4 % TC removal across a broad pH range of 3–11, validating exceptional pH adaptability. Additionally, SE-NiO/OCB achieved a removal rate of ≥ 86.7 % for multiple tetracycline antibiotics at neutral pH, underscoring its broad applicability. The cost of utilizing SE-NiO/OCB to drive the H*-mediated E-Fenton reaction for TC removal was merely 0.05 RMB/(mg TC), which was significantly lower than that of noble metal catalysts. Thus, this work resolved critical economic and universality limitations in H*-mediated electro-Fenton processes, advancing scalable antibiotic wastewater treatment strategies.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Pei Su,Xuedong Du,Yang Zheng,Wenyang Fu,Qizhan Zhang,Minghua Zhou
A bifunctional catalyst with Ce-based metal–organic frameworks deposited on carbon encapsulated Fe 3 O 4 particles (Ce-MOFs/Fe 3 O 4 @C) was prepared for heterogeneous electro-Fenton (EF), which exhibited high H 2 O 2 generation efficiency (over 90% selectivity and 80.7% current efficiency), high sulfamethazine (SMT) removal with very low electric energy consumption (7.65 kWh kg −1 SMT), and wider pH suitability to alkaline environment (pH 9). The highest content of oxygen vacancies (O V ), Ce 3+ and Fe 2+ was simultaneously exhibited when the Fe/Ce ratio in precursor was 2:1. Interface-confined between Ce-MOFs and Fe 3 O 4 @C and presence of O V promoted the O 2 adsorption for oxygen reduction reaction and O 2 ∙- generation, and electron transfer between Fe and Ce. Meanwhile, the presence of Fe 2+ /Fe 3+ and Ce 3+ /Ce 4+ simultaneously facilitated the sequential catalysis induced by H 2 O 2 to generate ∙ OH, and Ce 4+ could promote O 2 ∙- to generate 1 O 2 . This work provides new insight into the design and synthesis of Fe-based catalysts in EF with interface confinement and multi-layered reaction centers to improve the generation and the decomposition of H 2 O 2 at the same time at a low cathode potential.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Tong Yan,Yuqi Liu,Han Chen,Qi Wang,Xinying Wang,Yusi He,Baizhuang Li,Biao Li,Yuebin Feng,Huilong Luo,Wei Li
Cobalt-based materials have been demonstrated to be effective heterogeneous catalysts for peroxymonosulfate activation in degrading many refractory organic pollutants. In this study, a new cobalt-based catalyst was prepared using cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) as the Co 2+ source, 2,3-pyrazine dicarboxylic acid and 3,6-DI-4-pyridyl-1,2,4,5-tetrazine (4-PYTZ) as ligands. This catalyst was employed as a peroxymonosulfate activator for the degradation of Rhodamine B(RhB). The results indicated that the prepared Co-based catalyst can effectively degrade RhB dye in aqueous solution by activating peroxymonosulfate (PMS). Specifically, when the initial concentration of RhB was 20 mg/L, its degradation rate exceeded 98 % within merely 9 min. The factors influencing the activation of PMS by the Co-based catalyst were examined, including PMS concentration, reaction temperature, solution pH, and the concentration of organic pollutants. Stability and reusability tests demonstrated that the prepared catalyst exhibited good stability, with the degradation rate of RhB remaining above 97 % after four repetitive experiments. Free radical quenching experiments and electron paramagnetic resonance (EPR) analyses revealed that sulfate radicals (SO 4 − ) and hydroxyl radicals ( OH) are the primary reactive radicals accountable for the degradation process. Additionally, it displayed excellent adaptability over a wide pH range, particularly within the pH levels ranging from 5 to 9. This study demonstrates that the prepared Co-based catalyst can serve as a stable and effective option for degrading organic dyes in wastewater treatment applications.
研究领域:
环境科学
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催化材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kun Zhou,Boran Wu,Lianghu Su,Wenshu Xin,Xiaoli Chai
Phosphate removal is an important measure required to control eutrophication of water bodies as it inhibits excessive algal growth. Currently available phosphate removal methods have various limitations and function poorly under wide pH ranges. This study successfully prepared and characterized a novel nanocomposite adsorbent, nHFZO@I402, which has high capacity and specific affinity towards phosphate. The nHFZO@I402 constituted of nanostructured hydrated ferric oxide and hydrated zirconium oxide loaded on the surface and inside the pores of a polymeric anion exchanger. Batch experiments were conducted to investigate the effects of varied conditions on phosphate adsorption. The results demonstrated that nHFZO@I402 achieved high phosphate removal efficiencies over a wide pH range (4–11), which indicates higher adaptability towards varying environmental conditions. In addition, nHFZO@I402 exhibited enhanced phosphate adsorption capacity regardless of coexisting anions (chloride, nitrate, sulfate, and carbonate) at different concentrations. Kinetic analysis suggested that the adsorption process best-fitted with the pseudo-second-order kinetic model, suggesting chemical sorption mechanism. Furthermore, the underlying mechanism of phosphate adsorption by nHFZO@I402 was assessing through XPS analysis. Phosphate removal was effected by the replacement of hydroxyl groups by phosphate species and interaction between ammonium groups and phosphate. In general, these results indicated that nHFZO@I402 is a highly efficient adsorbent for phosphate removal with excellent adaptability to varying and undesirable environmental conditions.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Haiyan Xu,Jinqing Wang,Xiaohan Yang,Liping Ning
In the present work, an amphiphilic and magnetically recyclable graphene oxide (MR-GO) demulsifier was devised and synthesized by graft of magnetic nanoparticles (Fe3O4@SiO2-APTES) and ethylenediamine on the GO surface. The wettability and surface charges of MR-GO under various pH conditions can be regulated via adjusting the contents and species of surface functional groups (such as amino, carboxyl, and hydroxyl). In the demulsificaition test, MR-GO displayed favorable demulsification performance for crude oil-in-water (O/W) emulsion under pH of 2.0–10.0, thusly greatly improving the application scope of common demulsifier. The optimal dosage of MR-GO was 200 mg/L and the demulsification efficiency attained a maximum value of 99.7% for crude O/W emulsion with pH of 6.0. What’s more, owing to its magnetic response performance, the MR-GO can be reused and the demulsification efficiency remained above 91.0% after six cycles. Based on the strong interfacial activity, MR-GO can arrive to the crude oil–water interface. With the synergy effects of interfacial adsorption (π–π/n−π) interactions and electrostatic attraction of demulsifier and interfacial films, and the aid of external mechanical forces, the interfacial films stabilized the emulsion were disrupted. Therefore, the oil droplets coated on the water droplets were gathered rapidly to form oily flocs and then migrated to the water surface to accomplish the demulsification of crude O/W emulsion.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2021
·
IF 6.498
Hongyou Wan,Jingwei Yan,Cong Guo,Quantao Cui,Wei Zhang
A core-heteroshell structural magnetic composite of ZIF-67/Vanadium-titanium magnetite (VTM) was successfully synthesized through a feasible solvothermal method and efficiently used in activation of peroxymonosulfate (PMS) for the treatment of levofloxacin (LVF) in an aqueous solution. The catalytic activity of the ZIF-67/VTM composite in LVF degradation was thoroughly evaluated, demonstrating the LVF removal rate could reach up to 93.3% within 60 min at ZIF-67/VTM composite dosage of 100 mg/L, PMS concertation of 75 mg/L, and the natural pH of 6.4. It is quite interesting that the carbon organic skeleton (in the ZIF-67 shell) have accelerated the internal electron transformation rate of the ZIF-67/VTM composite, thus efficiently promoting the O–O band (in PMS) breakage and the redox cycle of cobalt, further favoring the free radicals generation. The quenching experiments and EPR analysis results demonstrated that ·SO 4 − would play a crucial role in the LVF degradation process. Surprisingly, we have found that the introduction of Cl − (at some certain dosage) would not always decrease the LVF degradation ratio, for a new reactive oxygen species (singlet oxygen) was emerged in this system. What's more, the ZIF-67 (as the wrapping structure) could stabilize the VTM (the inner structure) in changing reaction conditions, prompting a good adaptability at a wider pH range (3–10) for inhibiting the leaching of various metal ions into the aqueous solution. This novel ZIF-67/VTM composite could provide new ideas and routes for the removal of emerging pollutants from an aqueous solution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yatao Pan,Guangjing Hou,Xiaojuan Wang,Xia Ran,Pingan Liu,Lijun Guo
Developing novel inhibitors for the fibrillization of amyloid peptides and understanding the relevant assembly processes are essential for biomedical and biomaterial sciences. Herein, we have synthesized and characterized the nitrogen and fluorine co-doped graphene quantum dots (N, F-GQDs), and investigated their inhibition of the fibrillization of Amyloid-beta peptide (1–42) (Aβ 42 ) by monitoring the assembly morphologies in the Aβ 42 /N, F-GQDs systems. Our results indicate that the N, F-GQDs functionalized with multiple surface groups effectively inhibits the fibrillization of amyloid Aβ 42 . The strong adsorption of Aβ 42 on N, F-GQDs significantly reduces the generation of β-sheet structures and the cytotoxicity of Aβ 42 /N, F-GQDs aggregates. Accordingly, a morphological evolution from the long fibrils of Aβ 42 to the spherical particles and unique closed-loop structures of Aβ 42 /N, F-GQDs have been captured. A possible interpretation for the observed phenomena in the presence of N, F-GQDs has been proposed by combining the different inhibition effects of other GQDs on the fibrillization of Aβ 42 and the results from various control experiments. Moreover, the inhibition activity of N, F-GQDs demonstrates good adaptability to resist the fluctuation of pH value and the interference of divalent metal ions , facilitating their practical applications in the future.
研究领域:
生物医学
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材料科学
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神经科学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 12
·2770-2777
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IF 7
Shanhao Hao,Cheng Fu,Lin Zhou,Zhanghong Guo,Qijun Song
Iridium nanoparticles with an average size of 1.7 nm (Tar-IrNPs) were synthesized by the reduction of IrCl3 with NaBH4 in the presence of tartaric acid. As prepared Tar-IrNPs showed not only oxidase, peroxidase and catalase activities but also exhibited unprecedented laccase-like activity, which can catalyze the oxidation of the substrates o-phenylenediamine (OPD) and p-phenylenediamine (PPD) accompanied by significant color changes. The superb catalytic performance is evidenced by the fact that Tar-IrNPs can achieve better laccase-like activity with only 2.5% of the dosage of natural laccase. Furthermore, they also exhibited superior thermal stability and broader pH adaptability (2.0–11) over that of natural laccase. Tar-IrNPs can retain more than 60% of their initial activity at 90 °C, while the natural laccase has totally lost its activity at 70 °C. At a prolonged reaction time, the oxidation products of OPD and PPD can form precipitates due to oxidation induced polymerization. Thus Tar-IrNPs have been successfully used for the determination and degradation of PPD and OPD.
研究领域:
材料科学
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催化
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分析化学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Xue Bai,Juan Shi,Lu Xu,Xin Jin,Xuan Shi,Pengkang Jin
To overcome the shortcomings of homogeneous Fe ion activating peroxymonosulfate (PMS), such as high pH-dependence, limited cycling of Fe(III)/Fe(II) and sludge production, graphite carbon nitride (g-C 3 N 4 ) is chosen as a support for Fe ions, and reduced graphene oxide (rGO) is employed to facilitate the electron transfer process, thereby enhancing catalysis. Herein, a ternary catalyst, Fe-g-C 3 N 4 /rGO, is first applied under lightless condition for PMS activation , which exhibits ideal performance for contaminant mineralization. 82.5 % of the total organic carbon (TOC) in 100 mL of 5 mg/L bis -phenol A (BPA) was removed within 20 min by the optimal catalyst named 30%rFe 0.2 CN, which shows a strong pH adaptability over the range of 3–11 compared with a common Fenton-like system. Moreover, the highly stable Fe-g-C 3 N 4 /rGO/PMS catalytic system resists complex water matrices, especially those with high turbidity . To unveil the mechanism of PMS activation and pollutant degradation , the physicochemical properties of the as-prepared catalysts are comprehensively characterized by multiple techniques. The Fe(III) contained in both the Fe-N group and α-Fe 2 O 3 component of 30%rFe 0.2 CN not only directly reacts with PMS to produce sulfate radicals ( SO 4 − ) and hydroxyl radicals ( OH), but also combines with PMS to form the essential [Fe(III)OOSO 3 ] + active complex, thereby generating superoxide radicals ( O 2 − ) and singlet oxygen ( 1 O 2 ). Among the various reactive oxidizing species, 1 O 2 plays an important role in pollutant removal , which is additionally generated by the C O moiety of the catalyst activating PMS as well as PMS self-oxidation, indicating the dominance of the non-radical pathway in the pollutant degradation process. Due to the advantages of high efficiency, wide pH adaptability and stability, the proposed lightless Fe-g-C 3 N 4 /rGO/PMS catalytic system represents a promising avenue for practical wastewater purification.
研究领域:
环境科学
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催化材料
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废水处理
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）