POLYHEDRON
·
2024
·
IF 2.4
Firdous Bibi,Adeel Ahmed,Yathrib Ajaj,Ahmed Abd Al-Sattar Dawood,Muhammad Usman,Abdullah Alodhayb,Saikh Mohammad,Zubair Ahmad,Ambreen Kalsoom,Shahid Iqbal
Herein, we have synthesized Ni and Mn co-doped ZnFe 2 O 4 ferrites using the simple co-precipitation method and their nanocomposites (NCs) with 10 % rGO using the ultra-sonication route. The structural investigation revealed the successful formation of single-phase ZnFe 2 O 4 NPs with cubic spinel ferrite geometry. The crystallite size was determined to be in the range of 21 nm to 28 nm. The current–voltage (I-V) analysis revealed that Ni and Mn co-doping and the addition of rGO nanosheets in ZnFe 2 O 4 NPs boosted the electrical responses of the fabricated Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs. The BET analysis indicates an increase in the surface area of Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs (132 m 2 /g) that might be attributed to the inclusion of rGO nanosheets, which prevents the NPs from agglomeration. The photocatalytic evaluation of the pristine ZnFe 2 O 4 NPs, Ni and Mn co-doped Zn 1-x Ni x Fe 2-y Mn y O 4 NPs, and Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs photocatalysts was tested by photodegradation of malachite green (MG) dye under sunlight irradiation. Results exhibited improved photocatalytic responses and degraded 94.6 % of MG dye in 45 min using Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs, which was much higher compared to the Ni and Mn co-doped Zn 1-x Ni x Fe 2-y Mn y O 4 NPs (58.7 %) and pristine ZnFe 2 O 4 NPs (38.3 %). The increased degradation potential of Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs was accredited to the highly conducting nature and 2D nano-sheets of rGO, which efficiently inhibited the recombination of charge carrier species. Ultimately, the remarkable photocatalytic capability exhibited by Zn 1-x Ni x Fe 2-y Mn y O 4 /rGO NCs implies that the synthesized NCs could have auspicious practical applications in the elimination of dyes from wastewater.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Hang Wang,Qing Sun,Yuanyuan Lin,Jian Zhang,Jiawei Sheng
Development of highly efficient and recyclable catalysts based on peroxymonosate (PMS) activation for the degradation of dangerous antibiotic contaminants was still a challenging topic. In this study, a highly efficient and recyclable heterogeneous Co(OH) 2 /ZnFe 2 O 4 (Co-ZF) catalysts derived from metal-organic frameworks (MOFs) were prepared by a facile alkaline solution hydrothermal method , a high specific surface area (100.4 m 2 g −1 ) and soft magnetic properties (Ms=25.3 emu g −1 ) composite material was obtained, and used for degrading norfloxacin (NOF) via PMS activation. The effects of temperature, alkali concentration, pH, initial NOF concentration, PMS and catalyst dosage on NOF degradation were discussed in detail. The results illustrated that the degradation rate of norfloxacin by the 3Co-ZF160 catalyst synthesized under 3 M NaOH and 160 ℃ hydrothermal conditions was 97.2%, after four consecutive cycles of degradation, the degradation rate of NOF by 3Co-ZF160 remained over 91% within 60 min. In contrast, the degradation rate of the Co 3 O 4 /ZnFe 2 O 4 (CZF-600) catalyst calcined at 600 ℃ was only 74% available. Furthermore, The results of radical quenching suggested that OH•, SO 4 • − , SO 5 • − and 1 O 2 functioned in the presence of the Co(OH) 2 /ZnFe 2 O 4 -PMS system. Eventually, NOF degradation pathways were tentatively proposed on the basis presented via LC-MS. The above results highlight that the practical application of Co(OH) 2 /ZnFe 2 O 4 heterogeneous catalyst in aqueous solution was of great significance.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shu Wang,Xin Li,Yuan Chen,Wenlong Yang,Shuang Han,Hui Zhang
The artificial-photosynthesized S-scheme heterojunction for photochemical energy conversion has inspired promising implications for green environmental remediation. Herein, we develop a visible-light response Sn-CdS/ZnFe 2 O 4 heterostructure to exhibit efficient photo-Fenton functionalities on the degradation of dye RhB and antibiotic TC under the simulated solar-driven irradiation. In our work, s-p orbital hybridization by Sn-doping has been employed as an effective strategy to reconstruct a new valence band to further modify the sulfides for their long-term stabilities in strong oxidizing environment. We have not only calculated the rationality of doping model and heterostructure but also experimentally verified the photo-physical process of charge transfer. Furthermore, the modified photocatalyst is conducive to contribute to the rapid and sustainable Fenton-like reactions with the best RhB and TC degradation rates of 1.00 μmol·min −1 ·g −1 cat. and 11.26 μmol·min −1 ·g −1 cat. respectively, which synergistically interplays with the generation and transition of reactive oxygen free radicals. This work extends a new viewpoint for the transition metal doping territory of electronic structure optimization to achieve pollutant degradation with high activity and stability to favor water decontamination applications.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Chenggong Lu,Wanzhi Cao,Zhiqiang Wei,Zhiming Li
An efficient ZnFe 2 O 4 /ZnWO 4 photocatalyst based on Cu-MOF was prepared for the photo-Fenton-degradation of tetracycline under visible light. The microstructure as well as photoelectrochemical properties were qualitatively and quantitatively analyzed using XRD, SEM, TEM, XPS, PL, EIS and other characterization means, and the photodegradation mechanism was explored. The results showed that the rod-shaped ZnWO 4 was combined with spherical ZnFe 2 O 4 encapsulated on MOF, and the catalyst exhibited excellent light absorption, bulk phase separation and interfacial separation of photogenerated charges, resulting in excellent photo-Fenton-removal performance of tetracycline (TC). Among them, the ZnFe 2 O 4 /30 %ZnWO 4 /10 %Cu-MOF photo-Fenton degradation was the best, with more than 99 % degradation of TC within 60 min under simulated visible light. In addition, ZFO@ZWO@MOF has good photostability and reusability, and can be used to photo-Fenton degrade TC by a convenient magnetic recycling method. The radical capture experiments and electron spin resonance experiments fully proved that the main active substances for degrading TC are ·O 2 - and ·OH. This study provides an opportunity to construct type II heterojunction photocatalysts with high efficiency and convenient recycling, and offers new perspectives and insights into the purification mechanism of pollutants.
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
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IF 3.973
Bing Bian,Qingyun Liu,Shitao Yu
Artificial nanoenzymes which can overcome some drawbacks of natural enzymes is a challenging topic in the biosensor field. Herein, we demonstrated 5, 10, 15, 20-tetrakis (4-carboxylpheyl)-porphyrin modified magnetic ZnFe 2 O 4 nanoparticles loaded on the surface of reduced graphene oxide (Por-ZnFe 2 O 4 /rGO), which exhibited intrinsic peroxidase-like activity and rapidly oxidized the peroxidase substrate 3, 3′, 5, 5′-tetramethylbenzidine (TMB) into a blue product (OxTMB) distinguished by naked eyes. Interestingly, by comparative study of different nanomaterials ZnFe 2 O 4 nanoparticles, ZnFe 2 O 4 /rGO and Por-ZnFe 2 O 4 , Por-ZnFe 2 O 4 /rGO was proved to possess the highest peroxidase-like activity. Electron spin resonance (ESR) verified the catalytic activity of Por-ZnFe 2 O 4 /rGO for H 2 O 2 was due to hydroxyl radical from decomposition of H 2 O 2 . Temperature and pH strongly affected the peroxidase-like activity of Por-ZnFe 2 O 4 /rGO nanocomposites. Under optimal conditions (pH = 4, 40 °C), the constructed sensor based on the catalytic activity of the Por-ZnFe 2 O 4 /rGO could be conveniently used for colorimetric detection of H 2 O 2 in the range of 0.7–30 μM with the detection limit of 0.54 μM. Moreover, the colorimetric sensor based on Por-ZnFe 2 O 4 /rGO exhibited a good linear response to glutathione (GHS) in the range of 2–40 μM with a low detection limit of 0.76 μM. The detection of GHS can be easily realized through the obvious color change by naked eyes without any complicated instrumentation.
研究领域:
生物传感器
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纳米生物学
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分析化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Ziyang Lu,Zehui Yu,Jinbo Dong,Minshan Song,Yang Liu,Xinlin Liu,Zhongfei Ma,Hang Su,Yongsheng Yan,Pengwei Huo
The Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT was synthesized by the microwave polymerization method and surface imprinting technique, which possessed good partial hollow spherical structure, good light response ability, good magnetic separation performance, good photocatalytic stability and reproducibility. More importantly, due to the introduction of Ag/PEDOT into the surface imprinted layer, Z-scheme structure was formed to enhance the photocatalytic activity based on Ag acted as the mediator, meanwhile, owing to the existence of the imprinted cavity in the surface imprinted layer, the selectivity had been significantly improved, in a word, the as-prepared Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT achieved the goal for simultaneously improving the photocatalytic activity and selectivity. Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT possessed the highest photodegradation rate (71.77%) for degradation of tetracycline under the simulated sunlight irradiation of 120 min, which was approximately 4.74 times to that of ZnFe 2 O 4 , 1.42 times to that of Ag/PEDOT and 1.31 times to that of non-imprinted ZnFe 2 O 4 /Ag/PEDOT, respectively. And the coefficient of selectivity of Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT relative to ZnFe 2 O 4 , Ag/PEDOT, non-imprinted ZnFe 2 O 4 /Ag/PEDOT was 1.84, 1.82, 1.79 in the single antibiotic solution and 1.78, 1.75, 1.67 in the binary antibiotic solution, respectively. This work provided a new synthesis strategy for the imprinted photocatalysts and also provided a new idea for the treatment of specific pollutants in the water environment.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 10
·3137-3147
·
IF 6.177
Zhong-Ting Hu,Zi-Yan Jin,Si-Yan Gong,Xiuzhen Wei,Jia Zhao,Mian Hu,Jun Zhao,Zhong Chen,Zhiyan Pan,Xiaonian Li
Spinel ferrites with magnetic properties have great potential for the decontamination of aqueous systems due to their ease of recycling by magnetic separation. Herein, the purpose is to enhance ZnFe2O4 spinel properties in terms of magnetization and catalytic performance via Mn substitution into the crystal structure. Zn1−xMnxFe2O4 (x = 0–1) nanoclusters were successfully synthesized via an optimal hydrothermal process, in which additives (i.e., citric acid and ammonia) play key roles in inhibiting impurity phase formation via homogenizing the distribution of metal ions and slowing down the reaction rate. At a Zn/Mn ratio of 1 : 3, the nanocluster Zn0.25Mn0.75Fe2O4 (ZMF0.75) composed of nanoparticles with sizes ranging from 5 to 10 nm shows the highest saturation magnetization (Ms = 68 emu g−1, which is ∼5 times greater than that of ZnFe2O4) and the best catalytic performance, with >99% azoxystrobin (AZX) degradation in a Fenton-like system. Moreover, the findings unveiled that the balance of Zn and Fe occupation in the polyhedron centres in the spinel crystal is broken upon replacing Zn with Mn. In all probability, the Zn/Fe/Mn cross-occupation phenomenon is essential for enhancing the activity of Fe and Mn multivalent metal atoms. A plausible mechanism for the synergistic effect of multiple active sites in ZMF0.75 on the formation of HO˙ and HO2˙ radicals is proposed. This work proves that Mn-substituted ZnFe2O4 could be an efficient heterogeneous Fenton-like catalyst for EOC decontamination in aqueous systems with ease for recycling via magnetic separation.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Wenting Li,Zhuoran Yang,Chunyu Yang,Wei Guo
This study addresses the challenge of enhancing ferroptosis efficacy for tumor therapy, particularly the limited therapeutic efficiency of current inducers due to tumor microenvironment constraints. Herein, we developed a hollow ultrasound-triggered ZnFe 2 O 4 -Bi 2 MoO 6 (ZB) S-scheme heterojunction loaded with artesunate (ART) to overcome these limitations. The ZB heterojunction with a particle size of ∼250 nm efficiently separates electron-hole pairs under ultrasound (US), promoting the generation of reactive oxygen species (ROS). The photodynamic effect of ZB further boosts ROS production, while ART, controlled-released by phase change materials under laser/US stimulation, enhances ROS production via Fe 2+ -mediated decomposition. This triple-enhanced strategy accumulates lipid peroxidation (LPO), significantly improving ferroptosis effects with a tumor suppression rate of 94.3 %. Moreover, ZB enables multimodal imaging and stimulates antitumor immunity, demonstrating its potential as a diagnostic and therapeutic agent. Our findings demonstrate the potential of this ZB@ART system in advancing ferroptosis-based tumor therapies, inspiring future designs of efficient ferroptosis inducers.
研究领域:
癌症治疗
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纳米技术
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Qiqin Liang,Jingjing Zhang,Xiaosi Qi,Lei Wang,Junfei Ding,Xiu Gong,Jingliang Yang,Yanli Chen,Yunpeng Qu,Qiong Peng,Wei Zhong
The selenylation/sulfuration of magnetic precursor brings about the great challenges to construct magnetic transition metal dichalcogenides (TMDs)-based multicomponent nanocomposites (MCNCs), which greatly hinders the improvements in magnetic loss ability and impedance matching characteristic. Theoretically speaking, the addition of carbon layer is conducive to protect the magnetic nanoparticles, optimize the impedance matching, strengthen the interfacial polarization and magnetic loss abilities, and so on. In order to verify these ideas, herein, we elaborately designed and produced core@shell ZnSe/FeSe 2 @MoSe 2 and core@shell@shell ZnFe 2 O 4 @C@MoSe 2 flower-like MCNCs. The results of comparative study indicated that the as-prepared ZnSe/FeSe 2 @MoSe 2 and ZnFe 2 O 4 @C@MoSe 2 with the different MoSe 2 contents and flower-like geometrical morphologies could be synthesized by regulating the amounts of Mo and Se sources. And the introduction of carbon layer not only effectively inhibited the selenylation of ZnFe 2 O 4 precursor, but also greatly improved the impedance matching characteristic, dielectric and magnetic loss capabilities. The obtained ZnFe 2 O 4 @C@MoSe 2 MCNCs presented the excellent comprehensive microwave absorption properties (MAPs) including strong absorption capability, broad frequency bandwidth and thin matching thickness. Therefore, our findings not only presented a simple and viable route to produce magnetic TMDs-based MCNCs, but also provided an effective strategy to boost their comprehensive MAPs.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Bin Xu,Tao Ding,Yongcai Zhang,Yaoting Wen,Zhanjun Yang,Ming Zhang
This communication reports the development of a new efficient visible-light-driven composite photocatalyst comprising ZnFe 2 O 4 nanoparticles and conjugated polymer (CPVC) from the dehydrochlorination of polyvinyl chloride (PVC). ZnFe 2 O 4 /CPVC nanocomposites were synthesized via three main steps: (i) the synthesis of ZnFe 2 O 4 nanoparticles by a sol-gel method; (ii) the adsorption of PVC in tetrahydrofuran solution by ZnFe 2 O 4 nanoparticles to form ZnFe 2 O 4 /PVC nanocomposites; and (iii) the dehydrochlorination of PVC in the ZnFe 2 O 4 /PVC nanocomposites by heating at 150 °C for 2 h. X-ray diffraction, Fourier transform infrared spectroscopy and high-resolution transmission electron microscopy characterization revealed that the as-synthesized product was core/shell structured ZnFe 2 O 4 /CPVC nanocomposites. The photocatalytic results demonstrated that the ZnFe 2 O 4 /CPVC nanocomposites had much higher photocatalytic activity than ZnFe 2 O 4 nanoparticles in the reduction of aqueous Cr(VI) under visible-light (λ>420 nm) irradiation. Thus, ZnFe 2 O 4 /CPVC nanocomposites are promising for use as a new efficient visible-light-driven photocatalyst .
研究领域:
材料科学
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环境化学
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纳米技术
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光催化
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高分子化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Bin Du,Haoran Ye,Yincheng Wang,Ming Shen,Hui Zhou
The limited optical adsorption range and rapid recombination of photoexcited electron-hole pairs have severely hindered the development of ZnO-based photocatalysts . As macromolecular compounds, calixarenes become potential photocatalyst modifiers owing to their special molecular structures. In this work, ZnFe 2 O 4 /ZnO heterojunction photocatalysts which consist of ZnFe 2 O 4 nanoparticles and ZnO nanosheets were fabricated by simple hydrothermal reaction with the introduction of tetrasulfonatomethyl-n-hexyl calix[4]resorcinarene tetrasodium (THCRT 1 ). The synthesized ZnFe 2 O 4 /ZnO nanocomposite possesses a larger specific surface area , broader-spectrum absorption and an electronegative surface due to the addition of THCRT. Furthermore, the successful construction of ZnFe 2 O 4 /ZnO heterojunction leads to low charge transfer resistance and enhanced photocurrent density. Therefore, the THCRT-capped ZnFe 2 O 4 /ZnO composite exhibited superior adsorptive performance and removal efficiency towards Rhodamine B (RhB) and Levofloxacin hydrochloride (LH). The calcined nanocomposite degraded 95.80 % of RhB (10 mg L −1 ) and 97.86 % of LH (20 mg L −1 ) after 120 min under simulated sunlight illumination at a minimal catalyst dosage of 0 .1 g L −1 . Additionally, to determine the band structures , the band gaps, valence band positions and the Fermi levels were measured by Tauc plot, valence band x-ray photoelectron spectroscopy (XPS-Vb) and Mott-Schottky plot, respectively. Finally, based on the band structure results, we proposed a potential photocatalytic mechanism of n-n heterojunction. This work offers a promising prospect in the treatment of sewage containing organic contaminants.
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
TALANTA
·
2020
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IF 5.339
Yan-Li Zhu,Yan-Mei Lian,Ji-Kai Wang,Zeng-Ping Chen,Ru-Qin Yu
A facile MALDI-TOF mass spectrometric platform for quantitative analysis of protein biomarkers was developed based on magnetic ZnFe 2 O 4 nanoparticles and mass tagging signal amplification. In this platform, magnetic ZnFe 2 O 4 nanoparticles functionalized with an aptamer of the biomarker of interest was used to magnetically separate silica nanoparticles modified with another aptamer of the target biomarker and a barcoding peptide from solution phase in the presence of the biomarker of interest. After the silica nanoparticles were dissolved by KHF 2 , the released barcoding peptide was detected by MALDI-TOF mass spectrometry with magnetic ZnFe 2 O 4 nanoparticles used as assisting matrix of laser desorption ionization. Since the mass spectral intensity of the barcoding peptide is directly related to the concentration of the target biomarker, the proposed platform can be applied to the quantification of the target biomarker in complex biological samples. The effectiveness of the proposed platform was tested on the detection of carcinoembryonic antigen (CEA) in serum. Experimental results revealed that the proposed platform could achieve quite reliable quantitative results for CEA in human serum samples with accuracy comparable to a commercial CEA ELISA Kit. Its limit of detection and limit of quantification for CEA were estimated to be 0.6 × 10 −3 and 1.8 × 10 −3 ng/mL, respectively, considerably lower than the corresponding values reported in literature. Due to its features of simplicity in design, extremely low background signal, high sensitivity and selectivity , the proposed method can be further developed to be a competitive alternative for the quantification of CEA and other protein biomarkers as well.
研究领域:
分析化学
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生物化学
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生物医学工程
·
临床化学
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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）