MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Xiaofei Ren,Yubo Wang,Guicong Hu,Qingbin Guo,Dengzheng Gao,Xiaolong Hu,Li Wang,Junying Song
In this work, CoFe 2 O 4 /Sepiolite catalysts were successfully synthesized via a water bath-calcination method. The composite performed greatly enhanced norfloxacin (NOR) degradation activity by activating PMS, and the reaction rate constant was about 6.31 times higher than that of bare CoFe 2 O 4 . This was mainly attributed to the introduction of sepiolite support leading to higher adsorption capacity, more exposed reaction active sites due to the formation of CoFe 2 O 4 nanoparticles with smaller grain size. The EPR and quenching experiments indicated that SO 4 •− and 1 O 2 were the main major contributors for NOR degradation. The redox cycle of Co 2+ /Co 3+ and Fe 2+ /Fe 3+ were mainly responsible for the continuous generation of reaction active species thereby achieving the efficient NOR degradation. Moreover, the enhanced catalytic mechanisms and NOR degradation pathways in CoFe 2 O 4 /Sepiolite/PMS system were further proposed. Overall, this study provides a new insight for the rational design of mineral-based PMS catalysts for efficient wastewater treatment.
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
ENERGY CONVERSION AND MANAGEMENT
·
2024
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IF 9.9
Muhammad Usman,Faiqa Nadeem,Hina Ramzan,Muneeb ur Rahman,Fuhua Shen,Muhammad Shahzaib,Reeta Rani Singhania,Anil Kumar Patel,Zhiping Zhang,Shengyong Liu,Nadeem Tahir
The interaction between the photo-induced charges from photo nanocatalysts (PNCs) and biohydrogen production strains plays a key role in controlling the metabolism mechanism in fermentative biohydrogen production from lignocellulosic biomass wastes. Thus, in the present study, two strains of Rhodopseudomonas palustris (PNSB) and a mixed consortium of HAU-M1 were evaluated for their biohydrogen production potential from corn stover (CS), whereas metabolism was catalyzed through photo-induced electrons from magnetic PNCs of cobalt ferrite (CoFe 2 O 4 ). The threshold concentration of CoFe 2 O 4 (400 mg/L) produced 428.62 mL and 373.30 mL biohydrogen in PNSB and HAU-M1, which is 129.0 % and 81.12 % higher as compared to respective control groups (CGs), respectively. The presence of PNCs provides the photo-induced electrons, which catalyze the metabolic processes as butyric acid increases by 96.29 % and 94.87 % in PNSB and HAU-M1, respectively, hence increasing hydrogen production. The results were supported by microbial community investigation, which showed that the incorporation of the appropriate concentration of PNCs effectively changes the bacterial community dynamics and diversifies the phyla ( Firmicutes , Proteobacteria , and Bacteroidetes ) and hydrogen-producing genus Clostridium . The recovered yield of CoFe 2 O 4 PNCs from PNSB and HAU-M1 fermentative mediums in three consecutive cycles was (90.87 %, 88.94 %), (80.25 %, 72.25 %), and (69.75 %, 60.80 %) respectively showing potential for recycling catalysts during the fermentation process. Thus, selecting the right photocatalysts and strain can affect metabolism and biohydrogen production, while recyclability reduces environmental leaching.
研究领域:
微生物学
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环境科学
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能源生物学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Xia Yang,Yi He,Xueling Wang,Ruo Yuan
Mercuric ion (Hg 2+ ) is one toxic metal ion existed in aquatic ecosystems which would seriously damage human central nervous system and other organs. So developing an approach to sensitively detect Hg 2+ in our living environment is urgent and important. In this work, a novel surface enhancement Raman spectrum(SERS) sensor is fabricated for high selective and ultrasensitive detection of Hg 2+ in aqueous solution, based on a stable thymine-Hg 2+ -thymine (T-Hg 2+ -T) structure and the π - π interaction between single-stranded DNA (ssDNA) and single walled carbon nanotubes (SWCNTs). Herein, SWCNTs act as Raman labels to produce characteristic Raman peaks which can be a beacon to quantitative detect Hg 2+ . In the presence of Hg 2+ , the ssDNA can capture Hg 2+ forming T-Hg 2+ -T structure, which makes SWCNTs leave the hot spots of the SERS-based biosensor. With this design, the Raman intensity of SWCNTs decreased with the increasing concentration of Hg 2+ . At the same time, CoFe 2 O 4 @Ag as active SERS substrates can effectively enhance sensitivity and uniformity of the biosensor through aggregation by magnet. Under optimal conditions, this proposed biosensor can detect Hg 2+ at a range from 1 pM to 100 nM with a detection limit of 0.84 pM. With the advantages of good sensitivity, selectivity, simplicity and rapidity, the biosensor is potentially suitable for monitoring of Hg 2+ in environmental applications.
研究领域:
环境科学
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生物传感
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纳米技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Lili Liu,Rui Zhan,Meng Zhang,Jianan Li,Zhiping Wang,Haosheng Mi,Yunxiao Zhang
The catalysis effectiveness and influence factors of CoFe 2 O 4 nanoparticles were investigated with peroxymonosulfate (PMS) as oxidant. Meanwhile, the degradation mechanism of levofloxacin (LVF) and the toxicity of its degradation products were analyzed. Efficient LVF degradation (95.4%) could be achieved within 30 min in CoFe 2 O 4 /PMS system with the optimum reaction conditions. The removal efficiency of LVF was decreased from 94.66% to 27.38% as the concentration of HCO 3 − increased from 0 to 20 mM, while increased to nearly 100% with 5 mM H 2 PO 4 − addition. The inhibition effect of Cl − on LVF removal decreased as the concentration of Cl − increased, and the addition of humic acid did not affect the final removal efficiency of LVF significantly. According to the results of degradation experiments and XPS analysis, both Co(II)/ Co(III) and Fe(II)/ Fe(III) redox pairs were involved in PMS catalysis, and Co(II)/ Co(III) played a dominant role. SO 4 •− was the dominant free radical in CoFe 2 O 4 /PMS system for LVF degradation, and five possible degradation pathways were proposed based on the eleven degradation products. Compared with LVF, more toxic degradation products were generated in degradation pathways of decarboxylation and conversion of quinolone moieties, due to the coexisting of SO 4 •− and HO•. Meanwhile, the luminescence inhibition ratio of the reaction solution (23.5%) was still higher than the original LVF solution (21.4%) by the end of the experiment. Therefore, the degradation pathways that generate toxic products should be avoided or detoxification by the complete mineralization of LVF, which needs further research via the targeted optimization of CoFe 2 O 4 /PMS system.
研究领域:
环境科学
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化学
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毒理学
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
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2023
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IF 8.4
Jingjing Zhang,Yue Zhao,Kai Zhang,Amir Zada,Kezhen Qi
In this work, different mass percent ratios of CoFe 2 O 4 coupled g-C 3 N 4 (w%-CoFe 2 O 4 /g-C 3 N 4 , CFO/CN) nanocomposites were integrated through a hydrothermal process for the sonocatalytic eradication of tetracycline hydrochloride (TCH) from aqueous media. The prepared sonocatalysts were subjected to various techniques to investigate their morphology, crystallinity, ultrasound wave capturing activity and charge conductivity. From the investigated activity of the composite materials, it has been registered that the best sonocatalytic degradation efficiency of 26.71 % in 10 min was delivered when the amount of CoFe 2 O 4 was 25% in the nanocomposite. The delivered efficiency was higher than that of bare CoFe 2 O 4 and g-C 3 N 4 . This enriched sonocatalytic efficiency was credited to the accelerated charge transfer and separation of e − -h + pair through the S-scheme heterojunctional interface. The trapping experiments confirmed that all the three species i.e. • OH, h + and • O 2 − were involved in the eradication of antibiotics. A strong interaction was shown up between CoFe 2 O 4 and g-C 3 N 4 in the FTIR study to support charge transfer as confirmed from the photoluminescence and photocurrent analysis of the samples. This work will provide an easy approach for fabricating highly efficient low-cost magnetic sonocatalysts for the eradication of hazardous materials present in our environment.
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
MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Wenfeng Zhuge,Xiaokun Li,Suxiang Feng
Simple, fast, and sensitive detection methods are required for reduced glutathione (GSH), a metabolic substance that acts as an indicator for a variety of diseases and is also found in numerous supplements and drugs. Herein, a sensitive and selective photoelectrochemical (PEC) sensor was developed for GSH detection. The novel PEC sensor was fabricated using CoFe 2 O 4 nanoporous spheres and copper tetraaminophthalocyanine–graphene oxide (CuTAPc-GO) as photoelectric materials. Under illumination, CoFe 2 O 4 facilitated the spatial separation of the photogenerated charge carriers in CuTAPc-GO, thereby enhancing the photocurrent signal of the PEC sensor. The influences of pH, CoFe 2 O 4 amount, coating amount, and applied bias potential on the PEC response toward GSH were investigated. Under optimized conditions, the designed PEC sensor presented a wide linear response range for GSH of 0.25–320 μM with a detection limit of 0.016 μM at a signal-to-noise ratio of 3. Moreover, this PEC sensor exhibited excellent selectivity, reproducibility, and stability, showing satisfactory results for the detection of GSH in urine and pharmaceutical drugs.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Qianyu Zhang,Xiaoqin Sun,Yuan Dang,Jun-Jie Zhu,Yuan Zhao,Xiaoxiang Xu,Yuanzhen Zhou
A novel electrochemically enhanced homogeneous-heterogeneous catalytic system was constructed by placing the prepared heterogeneous catalyst (CoFe 2 O 4 /NF) in parallel between the anode and the cathode for peroxymonosulfate (PMS) activation to remove levofloxacin (LVF) in this work. Over 90% of LVF could be effectively removed by the constructed system after 40 min's degradation. And the electrical energy consumption was only 2.51 kWh/m 3 , which was lower than 54.5% of the traditional electrochemical advanced oxidation process . Besides, the system broadened the response range of pH and overcame the inhibitory effect of alkaline conditions on degradation. These activities were mainly due to the high generation ability of free radical (SO 4 ·- , ·OH and O 2 ·- ) and non-radical ( 1 O 2 ). And the SO 4 ·- was found to be the main radical for LVF degradation. The high SO 4 ·- generation ability was demonstrated to be resulted from the dual effects of synergy of CoFe 2 O 4 /PMS and enhancement of electrochemistry in EC/CoFe 2 O 4 /PMS system. In detail, electrochemistry could effectively promote the continuous circulation of Co 2+ /Co 3+ and Fe 2+ /Fe 3+ redox cycles on the surface of CoFe 2 O 4 to enhance the activation of PMS , thereby generating SO 4 ·- . This work can provide a promising and cost-effective approach to construct highly efficient organic pollutant degradation system.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Meijuan Ding,Mei Li,Ziyu Li,Jingyi Nie,Xianglong Lyu,Zhiliang Jin
To investigate the hydrogen evolution performance of Mn 0.5 Cd 0.5 S (MCS) under visible light and its degradation effect on tetracycline, this study prepared MCS and CoFe 2 O 4 (CFO) photocatalysts via the hydrothermal method. Specifically, MCS was synthesized using manganese acetate as the Mn source, cadmium acetate as the Cd source, and thioacetamide as the S source, while CFO was prepared using cobalt nitrate and iron nitrate as precursors. The composite material CFO/MCS was fabricated via an ultrasound and calcination method for photocatalytic hydrogen evolution and tetracycline degradation. The results demonstrated that the CFO/MCS-24 % composite exhibited the best catalytic performance. Under a 10 W light source for 5 h, the maximum hydrogen evolution reached 401 μmol, with AQE of 0.15 % at a wavelength of 450 nm. Additionally, CFO/MCS-24 % degraded 88 % of tetracycline within 120 min. Based on XPS spectra analysis, DFT calculations, and the conduction and valence band positions of CFO and MCS, it is speculated that Z-scheme heterojunction is formed between them. The successful preparation of CFO/MCS not only significantly enhanced the catalytic activity of the photocatalyst but also enabled the recycling of the nanocatalyst, providing a valuable reference for the application of composite materials in photocatalysis.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
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2020
·Vol. 150
·期 10
·2863-2872
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IF 2.482
Zhang Pingbo,Chen Yifeng,Zhu Mengnan,Yue Chengguang,Dong Yuming,Leng Yan,Fan Mingming,Jiang Pingping
Magnetic mesoporous CoFe 2 O 4 @(CaO–ZnO) exhibited good catalytic activity in the transesterification of glycerol and dimethyl carbonate to yield glycerol carbonate. The glycerol conversion of 97.7% and glycerol carbonate yield of 96.9% could be obtained in this reaction system under the optimized reaction conditions. CoFe 2 O 4 @(CaO–ZnO) was characterized by a series of techniques including TPD, XRD, SEM, TEM, EDS, VSM and BET to evaluate the physico-chemical properties of the catalyst. It was demonstrated that the interaction of acid–base sites improved the catalysis performance of CoFe 2 O 4 @(CaO–ZnO): the strong basic sites were beneficial to the activation of glycerol to glyceroxide anion which could increase glycerol conversion, and the acid site contributes to the carbonyl activation of dimethyl carbonate, converts glyceroxide anion to glycerol carbonate, and improves the selectivity of glycerol carbonate. Meanwhile, the solid–liquid separation process after reaction would be simplified significantly considering CoFe 2 O 4 @(CaO–ZnO) could be easily separated from the reaction mixture under magnetic action. Graphic Abstract Acidic–basic bifunctional magnetic mesoporous CoFe 2 O 4 @(CaO–ZnO) was used as a solid base catalyst for the glycerol transesterification. Basic sites were beneficial to the activation of glycerol to glycerol oxygen anion to increase glycerol conversion and acidic sites were beneficial to carbonyl activation of DMC to increase glycerol carbonate selectivity. With magnetism, the solid base catalyst was easily recovered.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Kun Song,Rui Yang,Xiaoshuang Chen,Xin Wang,Guoli Chen,Nan Zhao
Developing electrodes with high stability and high specific capacity are two strategies to promote the application of supercapacitors. However, high specific capacity electrodes possess poor cycling stability, and good cycling performance electrode possesses low specific capacity, so it is difficult to achieve a balance. The stability of nano-sized metal oxides is reduced due to the collapse of their nanostructures during the cyclic process. Thus, the channel of electron transmission is destroyed, and the conduction of charge is not smooth. Therefore, we select electrodes with highest specific capacity and better cycling performance from many structures of CoFe 2 O 4 electrodes that are controllable designed by solvent ratio and structure-directing agent, such as chain, sphere, box, belt etc. In addition, we use an electrochemical method to coat the electrode with a layer of PEDOT to increase the conductivity and cyclic stability for practical application. Hence, the NF/CoFe 2 O 4 sphere/PEDOT as cathode indicates an outstanding specific capacity of 299.2 mAh g −1 at 1 A g −1 . The energy density is 230.4 Wh kg −1 (power density of 616 W kg −1 ). The aqueous hybrid supercapacitor shows a good cycle life, after 2000 cycles the capacity retention is 91.7%. The maximum current and self-discharge phenomena of mechanical energy charging are also studied and it is demonstrated that it has good tolerance to large current, which is suitable for mechanical energy charging.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 80
·50546-50554
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IF 3.108
Rong Li,Chencen Sun,Jia Liu,Qiang Zhen
Magnetically recoverable sulfur-doped CoFe2O4 nanopowders were used as photocatalyst for degradation of oxytetracycline (OTC) under visible light in aqueous solution. S doped CoFe2O4 nanopowders synthesized by a simple calcining process were characterized by XRD, TEM, VSM, FT-IR, UV-vis DRS and XPS. The results showed that introducing of S element in CoFe2O4 crystal structure narrowed its band gap and increased visible light absorption. 0.3 S-CoFe2O4 exhibited the highest magnetic property and photocatalytic activity. The maximum photocatalytic conversion ratio of OTC reached 90.4% at pH = 8.5 after 5 h irradiation. During photocatalytic process, seven intermediate products were detected, and based on that a detailed degradation path way of OTC was proposed.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Meng Zhang,Lili Liu,Jianan Li,Rui Zhan,Zhiping Wang,Haosheng Mi,Yunxiao Zhang
The catalytic mechanism of CoFe 2 O 4 nanoparticles (NPs) was investigated in the system of electrochemical enhanced heterogeneous activation of peroxymonosulfate (EC/CoFe 2 O 4 /PMS) with moxifloxacin (MOX) as target contaminant. The removal efficiencies of MOX in PMS, CoFe 2 O 4 , EC, CoFe 2 O 4 /PMS, and EC/CoFe 2 O 4 /PMS system were 18.3%, 36.1%, 43.7%, 96.9%, and 98.3%, respectively. Although there was no synergy effect between EC and heterogeneous catalytic oxidation reaction (HCOR) on MOX removal, the value of apparent rate constant ( k arc ) was much higher in EC/CoFe 2 O 4 /PMS system (0.24 min −1 ) compared with CoFe 2 O 4 /PMS system (0.13 min −1 ). Therefore, EC not only kept the structure of CoFe 2 O 4 NPs stable, but also significantly accelerated the reaction rate of HCOR. Meanwhile, according to electrochemical impedance spectra of catalysts synthesized based on ion-substitution strategy and the EC-HCOR experimental results, the decisive role of Co in PMS activation and the electron transfer between Co and Fe were confirmed. The TOC removal efficiency was reached 74.4% as the ratio of PMS to CoFe 2 O 4 NPs being 0.8 mM to 50 mg/L (30 min), and further improved to 87.6% with batch addition (0.25 mM per 30 min) of PMS (120 min, CoFe 2 O 4 = 100 mg/L). The research results could improve the understanding of catalytic mechanism of spinel oxide in electrochemical system.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）