MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Junling Duan,Li Zhao,Wei Lv,YiJing Li,Yuanhong Zhang,Shiyun Ai,Lusheng Zhu
The g-C 3 N 4 /Fe 3 O 4 nanocomposites with good fluorescence and magnetic property were designed and prepared for simultaneous detection and separation of trace Cr(VI) in water. The g-C 3 N 4 /Fe 3 O 4 nanocomposites based fluorescent sensor for Cr(VI) showed high sensitivity and selectivity. The linear response range of Cr(VI) was found to be 0 to 600 μM with a detection limit of 0.5 μM. In addition, the g-C 3 N 4 /Fe 3 O 4 as a novel adsorbent had effective removal towards Cr(VI). The adsorption capacity could reach 59.2 mg/ g. Furthermore, the g-C 3 N 4 /Fe 3 O 4 nanocomposites displayed superparamagnetic properties, allowing them to be easily separated from the liquid phase via an external magnetic field .
研究领域:
环境化学
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分析化学
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纳米材料学
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环境污染与控制
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水处理技术
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Li Zhao,Wei Lv,Juying Hou,Yijing Li,Junling Duan,Shiyun Ai
We synthesized magnetically recyclable g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites as an emerging adsorbent for the malachite green (MG) removal in aqueous solution. Bath absorption experiments for MG were done to explore the influence (pH, adsorbent dosage and initial concentration) on its absorption process. The adsorption isotherm and kinetics followed Langmuir model and pseudo-second-order kinetic model, respectively. The thermodynamic datas (ΔG ○ < 0, ΔH ○ > 0, ΔS ○ > 0) showed that the adsorption process for MG was feasible, endothermic and spontaneous. The g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites showed excellent removal properties for MG. The maximum equilibrium adsorption capacity could reach as high as 3412 mg/g. The g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites could be easily separated using an external magnet, and the nanocomposites could be repeatedly utilized after five cycles. The ultra-high adsorption capacity, easy separation, and excellent recyclability enabled the obtained g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites a good adsorbent for the adsorption of MG.
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
TALANTA
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2014
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IF 3.511
Man Wang,Shihai Cui,Xiaodi Yang,Wentao Bi
An easy preparation of g-C 3 N 4 /Fe 3 O 4 nanocomposites by chemical co-precipitation has been demonstrated. The as-prepared materials were characterized by X-ray diffraction, transmission electron microscopy , Fourier transform infrared spectroscopy and thermogravimetric analysis . The high affinity of g-C 3 N 4 toward polycyclic aromatic hydrocarbons and the magnetic behavior of Fe 3 O 4 were combined to provide an efficient and simple magnetic solid phase extraction (MSPE). The adsorption and desorption of polycyclic aromatic hydrocarbons on g-C 3 N 4 /Fe 3 O 4 were examined. Different factors affecting the magnetic solid phase extraction of polycyclic aromatic hydrocarbons were assessed in terms of adsorption, desorption, and recovery. Under the optimized conditions, the proposed method showed good limits of detection (LOD, S/N=3) in the range of 0.05–0.1 ng mL −1 and precision in the range of 1.8–5.3% (RSDs, n =3). This method was also successfully applied to the analysis of real water samples; good spiked recoveries over the range of 80.0–99.8% were obtained.
研究领域:
材料科学
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环境化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Analytical Methods in Chemistry
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2022
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IF 2.594
Yanling Zhao,Yanfei Wen,Xing Hu,Bing Zhang
We proposed a colorimetric immunosensor based on g-C3N4@Fe3O4 nanocomposite-mediated transformation strategy for sensitive detection of carcinoembryonic antigen (CEA). The g-C3N4@Fe3O4 nanocomposite was synthesized and characterized by the scanning electron microscope (SEM), energy dispersive X-ray spectra (EDX), X-ray powder diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Fe3+ derived from g-C3N4@Fe3O4 nanocomposite could combine with sodium salicylate to form purple complex products. Based on this color development, the sandwich colorimetric immunoassay was built by utilizing g-C3N4@Fe3O4 nanocomposite as nanolabels on the microplate. With the increasement of CEA concentration, the purple color showed a gradient change. Under optimal conditions, the linearity range is 0.001–50 ng/mL with the detection limit of 0.35 pg/mL for CEA. More importantly, the colorimetric immunoassay has good selectivity, specificity, repeatability, and stability.
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yufeng Li,Guangshen Chen,Zhiyong Li,Pengfei Cheng,Zhang Zhang,Junming Liu
Photocatalytic reactions, such as H 2 production, CO 2 reduction, wastewater treatment, have emerged as highly promising technological solutions for addressing energy and environmental challenges. However, sedimentation-induced low photocatalytic activity and inconvenient recycling limit their practical applications. Here, we have developed magnetic-phototactic microbial robots for enhancing photocatalysis effect and directional recycling used/inactive photocatalyst. We first synthesized a magnetic g-C 3 N 4 /Fe 3 O 4 photocatalyst with enhanced visible light absorption, and then functionalized positively phototropic microalgae with the magnetic composite, which is denoted as magnetic-phototactic microbial robots. The photocatalytic efficiency of magnetic-phototactic microbial robots has substantially augmented up to 320% than that of g-C 3 N 4 /Fe 3 O 4 . Moreover, the magnetic-phototactic microbial robots can autonomously carry catalysts to bright underwater environment to efficiently utilize solar light for photodegradation, as well as exhibit highly efficient targeted recovery and recyclability. The highly efficient, environmentally friendly, and recyclable magnetic-phototactic microbial robot is expected to make great impacts on energy and environment fields.
研究领域:
环境科学
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能源技术
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生物工程
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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
Xiao Zhang,Bin Ren,Xi Li,Biming Liu,Shiwen Wang,Peng Yu,Yanhua Xu,Guoqiang Jiang
Carbon-bridge-modified malonamide (MLD)/g-C 3 N 4 (CN) was prepared by copolymerization of MLD with urea and melamine and loaded with Fe 3 O 4 for the high-efficiency removal of tetracycline (TC) in water under photo-Fenton. The prepared catalysts were characterized by SEM, TEM , N 2 adsorption–desorption analysis, XPS, XRD, and FTIR, which proved that the modification method successfully introduced the C bridge into the carbon nitride molecular system and increased the structural defects of the catalyst. The Carbon-bridge-modified MLD/CN/Fe 3 O 4 also had good visible-light response and charge-separation and transport abilities in the photoelectrochemical test. Degradation results showed that the photo-Fenton degradation of TC reached 95.8%, and the mineralization rate was 55.7% within 80 min at 80 mM H 2 O 2 dosage, 0.5 g/L catalyst dosage, and near-neutral pH by 0.8MLD/CN/Fe 3 O 4 . Moreover, the oxidation products and mineralization pathways of TC were explored by LC-MS. Toxicity analysis indicated low environmental threat of the intermediates in TC mineralization. EPR analysis and H 2 O 2 decomposition efficiency analyses showed an improvement in the H 2 O 2 decomposition performance of 0.8MLD/CN/Fe 3 O 4 . This work could provide a valuable insight for the application of heterogeneous photo-Fenton technology in wastewater treatment .
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Xiao Zhang,Bin Ren,Xi Li,Yanhua Xu,Biming Liu,Peng Yu,Yongjun Sun,Danhua Mei
In this study, graphitic carbon nitride (g-C 3 N 4 ) (CN) was conveniently and environmentally modified into a stable and easily recyclable photocatalyst for the high removal efficiency of dye contaminants in water. Magnetic carrier (CN/Fe 3 O 4 ) and heterojunction photocatalysts (Ag@AgBr/CN/Fe 3 O 4 ) were prepared by ultrasonic and in situ deposition of Fe 3 O 4 and Ag@AgBr nanoparticles on the CN , respectively, and characterized by the surface structure, optical, and electrochemical properties. The effects of different catalysts, silver loading, catalyst dosage, and different aeration conditions on the photocatalytic degradation of RhB were investigated. Results exhibited that the removal rate of RhB by Ag@AgBr/CN/Fe 3 O 4 reached 96% within 150 min when the Ag loading was 5%, the catalyst dosage was 0.4 g/L, and the aeration was air. Furthermore, the degradation rate constant was 17.3 × 10 −3 min −1 , which was 4.3 and 3.4 times higher than that of CN and CN/Fe 3 O 4 , respectively. The stability study demonstrated that Ag@AgBr/CN/Fe 3 O 4 had almost no risk of Ag and Fe leakage and showed high stability. Mechanism study indicated that the construction of Z-scheme heterojunction between Ag@AgBr and CN and trapping electron by Fe 3+ promoted charge transfer and electron–hole pair separation, thus enhancing photocatalytic activity.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Shu-ao He,Wei Li,Xiao Wang,Qiong Ma,Min Li,Wei Xu,Xue-chuan Wang,Chen-hui Zhao
The two-dimensional (2D) g-C 3 N 4 has a wide application prospect in photocatalysis field due to its larger surface reactions, wider absorption of light and faster charge separation. However, the lack of active site of reduction leads to its poor hydrogen evolution reaction (HER) activity. In this work, the intermediate β-FeOOH was synthesized as a high-efficiency precious metal free co-catalyst in hydrogen production. Then, the g-C 3 N 4 -Fe 3 O 4 /β-FeOOH (CNFF-x,y, x = 1, 2 and 3, y denotes the reaction time (h)) photocatalyst based on p-n and Z-scheme heterojunction was constructed via a subsequent solvothermal process. The chemical composition, microtopography, crystallography, photochemical and electrochemical properties of the CNFF-x,y were analyzed by XRD, FI-IR, TEM, XPS and so on. The visible-light-driven (VLD) catalytic performance of CNFF-x,y heterojunction was evaluated by the hydrogen evolution reaction (HER). Results showed that CNFF-2,10 photocatalyst based on p-n (g-C 3 N 4 -Fe 3 O 4 ) and Z-scheme (Fe 3 O 4 /β-FeOOH) heterojunction presented the highest VLD catalytic HER activity (33.25 μmol g −1 h −1 ) at the absence of Pt co-catalyst after illumination for 6 h. It indicated that the effective introduction of Fe 3 O 4 /β-FeOOH nanoparticles (NPs) into g-C 3 N 4 to construct double-heterojunction (g-C 3 N 4 -Fe 3 O 4 /β-FeOOH) could greatly broaden the light response property and inhibit the recombination of photo-induced carriers, exhibiting enhanced HER activity. Meanwhile, this double-heterojunction photocatalyst presented robust photostability and reproducibility even been used several times. The findings of an intermediate β-FeOOH were put forward in this study will provide some new ideas for the research of HER.
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DOI
高影响因子
Desalination and Water Treatment
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2026
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IF 3.4
Wei Liu,Jin Wang,Yan Hao,Qinghong Zhang,Kecun Ma,Mei Liu,Zhi Chen,Qingguo Chen
Norfloxacin (NFX) is a widely used antibiotic that poses a persistent threat to aquatic ecosystems. The combination of photocatalysis and microalgae has emerged as a promising strategy for antibiotic removal. However, current research predominantly focuses on optimizing photocatalytic conditions and overall system efficiency, often neglecting the dynamic physiological state of microalgae when exposed to the photocatalytic degradation products of NFX (PDPN), which is the mixture of intermediates after 2 h ZGF photocatalysis of 8 mg/L NFX. This study constructed a synergistic degradation system employing a ZnO/g-C 3 N 4 /Fe 3 O 4 (ZGF) composite photocatalyst and Chlorella vulgaris for PDPN removal. Within this synergistic system, our primary focus was on the microalgal activity when cultured in a medium prepared from the PDPN. The results indicated the degradation rate of PDPN reached 82.1% in the synergistic degradation system. Transcriptomic analysis revealed that microalgae exhibited enhanced adaptability to these products, which were generated from ZGF photocatalytic pre-treatment of NFX. Key functional categories, including catalytic activity, oxidoreductase activity, and cytochrome P450 drug metabolism were significantly upregulated. This study indicates that the ZGF/microalgae system simultaneously achieves efficient pollutant degradation and maintains high metabolic potential as revealed by transcriptomic profiling, providing crucial insights for developing stable and sustainable bioremediation technologies.
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高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Ze-Yu Liu,Wen-Qian Huang,Chuan-Qing Huang,Zhao-Zhen Liu,Xiao-Yue Tang,Wei-Chang Chen,Zheng-Zheng Tang,Yu-Xing Huang,Shuo-Chun Zheng,Lin Lin,Changzhu Li,Yong Ye
Photocatalytic disinfection is considered a promising method for eliminating the hazards of pathogenic bacteria. Graphitic carbon nitride (g-C 3 N 4 ) is an ideal photocatalytic bacterial inactivation material for its advantage of tunable band structure, good stability and easy preparation. This work has constructed a novel defective 3D porous g-C 3 N 4 by cyanamide carbonation using dendritic mesoporous silica template. The direct loading of Fe 3 O 4 nanoparticles provided an excellent pg–C 3 N 4 –Fe 3 O 4 photocatalyst suitable for water disinfection . Compared to pristine g-C 3 N 4 , the prepared 3D porous defective g–C 3 N 4 –Fe 3 O 4 exhibited the enhanced visible light absorbance as indicated by the band gap decreasing of 0.66 eV, and about 3 and 10 fold increase of photo-induced current response and O 2 adsorption respectively. The pg–C 3 N 4 –Fe 3 O 4 showed excellent visible-light-driven photocatalytic bactericidal activity. It could kill 1 × 10 7 cfu mL −1 Escherichia coli completely within 1 h under visible-light illumination (100 mW cm −2 ) with good reusability, its logarithmic bacterial inactivation efficiency was about 2.5 fold higher than pg-C 3 N 4 . The enhanced bactericidal performance is mainly ascribed to the Fe 3 O 4 involved cascade photo-Fenton reaction.
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
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Tianqi Liu,Hailian Huang,Yunzong Liu,Konstantinos Papadikis,Beata Layla Mehdi,Pow-Seng Yap,Graham Dawson
A novel magnetic quinary nanocomposite, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI, was synthesized using a wet chemical method. The multi-heterojunction photocatalyst with multi carrier source and multi-channel carrier transport is constructed to enhance the photocatalytic degradation performance of pure g-C 3 N 4 . The design of the quinary nanocomposite is also an effective approach solving the chemical stability problem of silver halides. The photocatalytic degradation efficiency under visible light irradiation was analyzed for methylene blue (MB) as the target organic pollutant. The quinary nanocomposite with 10 % g-C 3 N 4 displayed high photocatalytic performance, with 83 % of MB degraded under 6 h LED white light irradiation. The effective quinary nanocomposite has good magnetic properties and can be magnetically separated to prevent secondary pollution of the photocatalyst in water. The band gap of protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI was found to be lower than pure g-C 3 N 4 . Parameters such as initial concentration of pollutant, initial solution pH, and light source were studied. Zeta potential results showed that the quinary nanocomposite could disperse homogenously to decrease aggregation in the solution. The photocatalytic mechanism was investigated, and the mineralization results were analyzed based on liquid chromatography-mass spectroscopy (LC-MS) and total organic carbon (TOC). It was found that the hydroxyl and superoxide radicals were major reactive species by scavenging experiments. Additionally, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI nanocomposite showed excellent reusability after magnetic separation and regeneration, thus suggesting it to be a promising photocatalyst for treating wastewater 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
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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）