MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yaqin Yu,MengXue Wei,Junting Tong,Zhengdong Zhang,Xiaowei Song,Anni Liu,Rui Wang,Yu Zhang,Zhen Zhou
Arsenic (As) and antimony (Sb) are emerging pollutants with significant toxicity and carcinogenic potential. Their contamination in drinking water represents a health and safety risk. A novel Au-Fe 3 O 4 -C sensor was synthesized using an electrodeposition technique that leverages the superior electro-catalytic properties of gold (Au), the high adsorption capacity of Fe 3 O 4 , and the excellent conductivity of carbon fiber cloth. The Au-Fe 3 O 4 -C sensor enhanced the sensitivity of As and Sb stripping signals and reduced the limits of detection. Square wave voltammetry (SWV), used for As analysis, yielding LODs of 0.24 μg L −1 for As(III) and 1.20 μg L −1 for As(V). Differential pulse voltammetry (DPV), used for Sb analysis, yielding LODs of 0.50 μg L −1 for Sb(III) and 0.60 μg L −1 for Sb(V). We report quantitative detection of As and Sb in a mixed solution through DPV combined with the non-linear least squares based on Pearson function. The portable electrochemical workstation combined with Au-Fe 3 O 4 -C sensor was installed on a mobile inspection vehicle to detect As/Sb in groundwater (Shanxi, China) and rivers (Hunan, China). The indication error reached below12%, confirming the capability of electrochemistry based on Au-Fe 3 O 4 -C sensor for the field determination.
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BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Mengzhu Jiang,Jinhua Luo,Meiting Qiu,Kuan Peng,Guangjun Wang,Yonghong Wang,Xiaoyong Chen,Yaohui Wu,Wensheng Liu
At present, tetracycline (TC) is among the most widely utilized antibiotics and its widespread usage can bring the contamination in the environment, especially in water, leading to many ecological and health risks. In this research, a novel magnetic photocatalyst with Z-scheme heterostructure, ZnO/Fe 3 O 4 /BC (MZB), was developed by co-doping ZnO/Fe 3 O 4 on biochar derived from poplar wood powder. In 50 mL of 40 mg L −1 TC solution, a dose of 10 mg 0.8-MZB achieved a 90.4 % elimination of TC through adsorption-photocatalysis, with a photocatalytic degradation rate of 20.27 × 10 −3 min −1 , which was 2.1 and 5.8 times greater than ZnO and Fe 3 O 4 , respectively. The highest adsorption of TC by 0.8-MZB was 23.17 mg g −1 , and the adsorption behavior could be described by the pseudo-second-order kinetic models. The enhanced adsorption performance was attributed to its increased specific surface area, while the improved photocatalytic capability was primarily due to the Z-scheme heterojunction formed between ZnO and Fe 3 O 4 . Additionally, the BC functioned as a conductive channel, facilitating the separation of photogenerated electron-hole pairs (e − /h + ) and offering more active sites for electron transfer. The 0.8-MZB had excellent stability as the removal rate only slightly decreased by about 8 % after 5 cycles, and showed a high steady efficiency under different water matrices. In the toxicity assessment, the optimum concentration of 0.8-MZB could effectively promote the growth of mung bean seedlings, but the higher concentrations (400, 800 mg L −1 ) of 0.8-MZB inhibited them. This study provides a factual foundation for the implementation of photocatalytic technology in water pollution remediation as well as the utilization of agricultural and forestry residues.
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LANGMUIR
·
2026
·
IF 4.4
Feiyu Zhu,Xuzhen Dong,Jie Xu,Qianqian Wang,Chao Yan,Jie Sheng,Awabaikeli Rousuli,Fangyuan Yang
Conventional adsorbents for water arsenic pollution treatment suffer from agglomeration, difficult recovery, and insufficient active sites. To solve these problems, in this study, we prepared a CTAB-modified ferroferric oxide-sepiolite composite fiber (PAN-Sep@Fe3O4) supported on polyacrylonitrile (PAN) using coprecipitation and electrospinning technologies. We systematically investigated the material’s adsorption performance for As(V) under different conditions, including pH, adsorbent loading, coexisting ions, and adsorption–desorption cycles. Its structural and physicochemical properties were characterized by SEM, XRD, FT-IR, XPS, and VSM. Results indicate that the material exhibits a dense reticular mesoporous structure and superparamagnetism with an average pore size of 14.54 nm and a saturation magnetization of 21.89 emu g–1, which facilitates magnetic separation and recovery. The adsorption process conforms to the Langmuir isotherm model and the pseudo-second-order kinetic model, indicating chemisorption-dominated monolayer adsorption as the primary mechanism. The maximum adsorption capacity at 313 K reached 87.48 mg g–1. Thermodynamic analysis parameters indicated ΔG < 0, ΔH < 0, and ΔS > 0, confirming adsorption as an exothermic, entropy-driven spontaneous process. The adsorption mechanism involves oxidation of Fe2+ on the Fe3O4 surface to Fe3+, which then forms Fe–O–As coordination bonds with AsO43–. The Si–O framework and surface hydroxyl groups of sepiolite synergistically immobilize arsenic through chelation and electrostatic interactions. After five adsorption–desorption cycles, the removal efficiency remained above 98%, with good tolerance to coexisting ions. This composite fiber combines high adsorption efficiency, convenient magnetic recovery, and excellent formability, providing a practical technical solution for treating arsenic(V)-contaminated water bodies with potential for engineering applications.
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PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Lingling Fan,Cunhong Cen,Yuru Wu,Xiaohua Deng,Yuxuan Shi,Yuxing Huang,Xiaohong Tan,Shidong Li,Guiyin Li
Hepatocellular carcinoma (HCC) remains one of the most lethal malignancies worldwide, underscoring the urgent demand for early diagnostic strategies to improve patient survival rates. Glypican-3 (GPC3), a highly specific biomarker of HCC, has emerged as a promising target for early detection. Herein, we developed an innovative magnetic colorimetric aptasensor using ferrosoferric oxide@carbon quantum dots (Fe3O4@CQDs) nanocomposites. The Fe3O4@CQDs nanocomposites combine the magnetic properties of Fe3O4 with the unique optical characteristics of CQDs, exhibiting intrinsic peroxidase‑like activity. The animo-modified GPC3 aptamer (GPC3Apt) was covalently conjugated onto the Fe3O4@CQDs nanocomposites surface via EDC/NHS chemistry to form the recognition probe (Fe3O4@CQDs-GPC3Apt). Upon specific binding between the aptamer and GPC3, the resulting complexes (Fe3O4@CQDs-GPC3Apt-GPC3) modulate the catalytic oxidation of o-phenylenediamine (OPD) by H2O2, generating a yellow oxOPD product whose absorbance intensity correlated with GPC3 concentration. The proposed colorimetric aptasensor demonstrated a detection limit of 3.16 ng/mL and a linear range of 10–200 ng/mL, with high specificity against interfering proteins. It was successfully validated in human serum samples, yielding recoveries between 99.27% and 109.33%. Owing to its operational simplicity and cost‑effectiveness, this platform offers transformative potential for point-of-care HCC screening. Beyond advancing GPC3 detection, the work provides a flexible design paradigm that can be adapted for assays targeting other disease biomarkers.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 14
·791
·
IF 3.5
Yu Lian,Lu Jiarui,Yu Meng,Duan Yajing,Zhang Baofeng,Zhang Xuan,Wang Xiaoyue,Liang Cunzhen
Cu(I) doped Fe 3 O 4 nanoparticles was loaded onto graphene oxide, Cu-Fe 3 O 4 /GO with binary active sites and accelerated Fe(III)/Fe(II) cycle showed higher tetracycline hydrochloride oxidation efficiency than Fe 3 O 4 and Cu-Fe 3 O 4 , the influences of initial H 2 O 2 concentration, reaction pH, catalyst dosage, reaction temperature and radical scavengers on catalytic performance of Cu-Fe 3 O 4 /GO were investigated. The heterogeneous Fenton reaction over Cu-Fe 3 O 4 /GO surface contained Fe(III)/Fe(II) and Cu(II)/Cu(I) active sites, Fe species were the dominant active centers. Cu-Fe 3 O 4 nanoparticles and GO combined via C–O–Fe bond and formed a stable Cu-Fe 3 O 4 /GO conductive structure, which promoted electrons transfer between Cu-Fe 3 O 4 and H 2 O 2 , thus accelerating Fe(III)/Fe(II) and Cu(II)/Cu(I) cycles. GO significantly improved specific surface area, Cu-Fe 3 O 4 nanoparticles dispersibility, and adsorption performance of catalyst. Furthermore, the strong interaction between GO and Cu-Fe 3 O 4 prevented ions from leach, GO captured the soluble Fe(III) which was efficiently reduced to Fe(II) surf by surrounding H 2 O 2 and Cu(I) surf . The degradation efficiency maintained 80.7% after six cycles, the excellent stability can be ascribed to the strong interaction between Cu-Fe 3 O 4 and GO. Reactive oxygen species scavenging results indicated that surface-bound • OH surf played a dominating role, followed by aqueous • OH aq and superoxide radicals (O 2 •− ).
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ACS Applied Bio Materials
·
2026
·
IF 5.6
Jun Ge,Xuechao Shi,Shuxian Hou,Yimei Wang,Xin Zhou,Yuhan Ji,Zhiru Tao,Xinxin Liu,Yaqi Cheng,Shujie Li,Yao Xiao,Ye Hong,Zuchun Zhao,Fei Ge,Jun Wang
The proliferation of drug-resistant bacteria in water poses a significant public health threat. Experimental wastewater from microbiology laboratories and residual fluids in medical catheters are particularly prone to pathogenic bacterial growth and biofilm formation. This challenge requires antibacterial agents that can eliminate pathogenic bacteria with high efficiency. In this study, core–shell Ag@Fe3O4 NPs were synthesized via a straightforward solvothermal method. This structuration minimizes silver ion loss and ensures sustained antibacterial activity through core–shell synergy. Mechanistic studies revealed that Ag@Fe3O4 disrupts biofilm architecture and induces nucleic acid leakage via the synergistic release of Ag+ ions and the generation of reactive oxygen species (ROS). Significantly, Ag@Fe3O4 NPs exhibit superparamagnetic properties and demonstrate a low minimum inhibitory concentration (MIC) of 10 μg/mL. In water treatment simulations, Ag@Fe3O4 NPs maintained a 100% pathogen elimination rate across diverse environmental conditions after 40 magnetic recovery cycles. Furthermore, the Ag@Fe3O4 NPs achieved precise targeting and efficient removal of biofilms in a medical catheter model under magnetic guidance. Ag@Fe3O4 NPs offer an efficient and sustainable solution for eradicating waterborne pathogens and eliminating medical catheter biofilms.
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MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Mengting Li,Yuanyuan Ma,Chengzhi Sun,Gengsu Zhu,Chunyu Wang,Bo Zhong,Long Xia
Two-dimensional transition metal carbides/nitrides, typically exemplified by Ti 3 C 2 T x , featuring unique two-dimensional layered architectures, intrinsic defects, and abundant surface chemical compositions, have been recognized as highly promising novel microwave absorbing materials. Nevertheless, their intrinsic single dielectric loss mechanism significantly restricts the further improvement of microwave absorption performance. Herein, a facile solvothermal approach is proposed to anchor symmetrical pyramidal Fe 3 O 4 onto the surfaces and interlayers of Ti 3 C 2 T x and graphene nanoribbons, by which impedance matching is effectively balanced. The resulting composite, denoted as Fe 3 O 4 @Ti 3 C 2 T x /GNs, is endowed with additional loss mechanisms, thereby enhancing its microwave absorption performance. At a Ti 3 C 2 T x loading of 0.5 g/L and a thickness of 4.8 mm, the sample exhibits superior microwave absorption properties, with a minimum reflection loss of −51.97 dB achieved at 5.20 GHz, an effective absorption bandwidth of 2.72 GHz, and multi-band absorption characteristics. Notably, these findings provide valuable insights into the development of MXene-based composites with ultra-wide absorption bands and the clarification of electromagnetic wave absorption mechanisms.
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RSC Advances
·
2014
·Vol. 4
·期 28
·14441-14446
·
IF 3.708
Hui Zhang,Anjian Xie,Cuiping Wang,Haisheng Wang,Yuhua Shen,Xingyou Tian
As a result of their lightweight properties and high dielectric loss, graphene and their composites have attracted great attention for potential applications in wave absorption. Herein, we report room temperature conditions for the synthesis of a 3D composite hydrogel composed of reduced graphene oxide nanosheets and Fe3O4 nanoparticles (RGO–Fe3O4). The experimental results show that the composite has an interconnected 3D porous network with micrometer-sized pores, and that the Fe3O4 nanoparticles with a small size of about 5–10 nm are uniformly dispersed onto the thin graphene nanosheets. The as-prepared RGO–Fe3O4 composite hydrogel shows excellent microwave absorbability compared with previously reported nanocomposites based on graphene and Fe3O4. The obtained composite with a coating layer thickness of only 2.5 mm exhibits a maximum absorption of −47.9 dB at 10.1 GHz. In particular, the product with a coating layer thickness of only 2.0 mm shows a bandwidth of 5.3 GHz (from frequency of 11.3–16.6 GHz) corresponding to reflection loss at −10 dB (90% absorption). Additionally, the fabrication method is simple, low cost and easily done on a large scale. This further confirms that nanoscale Fe3O4 particles on graphene networks give the composite hydrogel the ability to realize practical applications for wave absorption.
研究领域:
材料科学
·
纳米技术
·
电磁波吸收
·
复合材料
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuqin Ren,Yaokun Fu,Lu Zhang,Lian Cong,Yichao Xie,Han Yu,Wenfeng Wang,Yuan Li,Lu Jian,Yu Wang,Shumin Han
Magnesium hydride (MgH 2 ) with high gravimetric hydrogen storage capacity is considered as one of the most potential hydrogen storage materials ; however, its development has been plagued by the high operating temperature and slow kinetics. In this study, we have design and synthesize a core-shell Ni/Fe 3 O 4 @MIL additive to aid the (de)hydrogenation of MgH 2 /Mg system via the co-catalytic effect of in-situ formed Mg 2 NiH 4 /Mg 2 Ni and Fe. The initial dehydrogenation temperature significantly reduces from 613 K to 517 K, and the MgH 2 -Ni/Fe 3 O 4 @MIL composite can reabsorb 4.17 wt% H 2 within 3600 s under 3.0 MPa H 2 at 373 K. Remarkably, the dehydrogenation activation energy of the composite decreases by 61.77 kJ/mol compared to the pure MgH 2 (159.71 kJ/mol). Moreover, the composite also shows good cycling stability without distinct capacity decay after cycling twenty times. Studies show that during dehydrogenation and hydrogenation processes, the Mg 2 NiH 4 /Mg 2 Ni act as catalysts to induce hydrogen desorption/absorption of MgH 2 /Mg. Meanwhile, the unique core-shell structure of the Ni/Fe 3 O 4 @MIL not only provides reaction sites, but also prevents the agglomeration of nanoparticles and maintains stable catalytic activity. This study provides a new idea for designing stable transition metal heterogeneous catalytic system to improve hydrogen storage performance of MgH 2 .
研究领域:
材料科学
·
氢能
·
纳米技术
·
催化
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Chemosensors
·
2023
·Vol. 11
·期 2
·73
·
IF 4.2
Ying Song,Kunyue Xiao,Qiang Chen,Xiaodong Zhang,Zhi Yu,Wenwen Chen,Xiubing Zhang,De Zhang,Dejiang Ni,Pei Liang
The detection of bifenthrin is closely related to the adsorption of SERS substrates. In this study, superparamagnetic Fe3O4@Au MNPs coated with GO were used to detect the adsorption and enrichment of bifenthrin molecules with benzene rings. Firstly, the thermal solvent method synthesized Fe3O4magnetic nanoparticles (MNPs) with a particle size of ~250 nm. Next, polyethylene imide (PEI) was used as an intermediate layer to modify the surface of Fe3O4to form a positively charged ultra-thin polymer middle layer. Next, the gold shell was developed by adsorption of ~20 nm AuNPs, without affecting the magnetic properties. Then, the additional amount of colloidal gold and GO on SERS performance was systematically studied. Using crystal violet (CV) as the probe, we investigated the SERS performance of composite nanomaterials. The lowest detected concentration reached 10−8mol/L, confirming that the composite functional material had good SERS activity and magnetic properties. Finally, the substrate was used to detect bifenthrin in an acetone solution, and the lowest detection concentration was 10−8mol/L. These results showed that the prepared GO/Fe3O4@Au MNPs were efficient SERS substrates that could detect bifenthrin pesticide residue with high sensitivity.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Hongfei Liu,Kexu Wang,Dongke Zhang,Dishun Zhao,Jianhua Zhai,Wenguang Cui
In this paper, an organic-inorganic hybrid material was synthesized via a simple but effective method, the novel material PGO-TiO 2 /Fe 3 O 4 (PGTF) was produced by loading TiO 2 and Fe 3 O 4 onto polymeric ionic liquid(PIL) functionalized graphene oxide(GO). The successful synthesis of PGTF and related structural feature were confirmed by a series of characterizations. The results of UV diffuse reflectance (DRS) demonstrated that the incorporation of PGO-Fe 3 O 4 to TiO 2 shifted the light absorption of TiO 2 from ultraviolet (UV) to visible region. The band gap energy of the PGTF reduced to1.92 eV as compared to TiO 2 (3.12 eV). Different materials were used to remove methyl orange (MO) from the aqueous solution. The results showed that PGTF had a superior capacity to remove dye due to the synergistic effects of adsorption and photocatalysis . The excellent adsorption properties may result from the high specific surface area of GO and the –NH 2 in the PIL. The polyionic liquid absorbed electrons due to the electrostatic action of the cation head in the polyionic liquid and GO which had high conductivity favored electron transport . The photocatalytic effectiveness increased as a result of the separation of photoexcited electron-hole pairs. The Langmuir model was investigated to evaluate the adsorption equilibrium behavior of MO dyes by PGTF. The maximum adsorption capacity( Q m ax ) was 67.88 mg/g for MO dyes. The pseudo-second-order kinetic model, with a correlation coefficient of 0.999, provided a good fit for the adsorption kinetic processes. The adsorption rate constant K 2 obtained by this model is 0.0072 g/(mg*min). The degradation rate constant of PGTF for MO in the photocatalytic stage was 0.00881 min −1 , which exhibited 3.7, 7.5 and 3 times higher than that of TiO 2 , FT and GTF. The main reactive species in the degradation process were O 2 − 、·OH、h + . PGTF had excellent repeatability because of the presence of Fe 3 O 4 . They can be easily separated from the water. These results indicated that the PGTF composites hold great potential for removing MO from wastewater.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Wei Yang,Jianwen Fei,Wei Xu,Hongyan Jiang,Marwan Sakran,Junli Hong,Wanying Zhu,Xuemin Zhou
High plasma urate is closely related to gout, cardiovascular and other diseases. Therefore, monitoring the content of uric acid (UA) in plasma is of great significance for the treatment of gout and the prevention of other related diseases. Herein, a biosensor based on the biomimetic oxidase Fe 3 O 4 nanoparticles (NPs) @MnO 2 nanosheets (Fe 3 O 4 @MnO 2 NS) was constructed for colorimetric determination of UA. MnO 2 NS is an efficient biomimetic oxidase, and we found that the intrinsic oxidase activity of MnO 2 NS doped with Fe 3 O 4 NPs can be significantly enhanced. The chromogenic substrate TMB can be catalyzed by Fe 3 O 4 @MnO 2 NS to generate blue oxidized TMB, and UA can decompose the MnO 2 NS to inhibit the color reaction of TMB selectively, thereby realizing the quantitative detection of UA. In addition, the UA biosensor can perform colorimetric analysis of UA level through three methods: naked eye, smartphone and ultraviolet-visible (UV–vis) spectrophotometer. The linear ranges of UV–vis spectrophotometry and colorimetry with smartphone were 1–70 μM and 200–650 μM, respectively, and the limits of detection (LOD) were 0.27 μM and 21 μM. The analysis results of human plasma samples showed that the method had good selectivity and practicability.
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PubMed
高影响因子
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