Carbon Letters
·
2024
·
IF 5.5
Liu Rui,Zhang Xin,Han Xue,Sun Yuan,Jin Shuang,Liu Ri-jia
Fe 3 O 4 /g-C 3 N 4 /TiO 2 catalyst has been fabricated using a simple ultrasonic method with high photocatalytic activity. The morphology, structure and optical properties of Fe 3 O 4 /g-C 3 N 4 /TiO 2 were systematically investigated by a variety of characterization techniques. The optimum degradation conditions were investigated by degrading tetracycline (TC) under visible light irradiation. The results showed that the degradation efficiency was the highest when the initial TC concentration was 5.0 mg/L, the pH value was 11 and the catalyst dosage was 1.0 g/L. After 100 min of visible light irradiation, the degradation efficiency of TC achieved at 73.61%, which was 1.64 and 1.19 times that of g-C 3 N 4 and Fe 3 O 4 /g-C 3 N 4 , respectively. Moreover, Fe 3 O 4 /g-C 3 N 4 /TiO 2 had good stability and recyclability. The results of capture experiments showed that ‧O 2 − and ‧OH were the main active species during the photocatalytic process, and a possible photocatalytic reaction mechanism of Fe 3 O 4 /g-C 3 N 4 /TiO 2 catalyst was proposed. This study provides a new way to improve the photocatalytic performance of g-C 3 N 4 , which has great potential in degrading pollutants such as antibiotics in wastewater.
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
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Kang-Ping Cui,Ting-Ting Yang,Yi-Han Chen,Rohan Weerasooriya,Guang-Hong Li,Kai Zhou,Xing Chen
Antibiotic pollution of water resources is a global problem, and the development of new treatments for destroying antibiotics in water is a priority research. We successfully manufactured recyclable magnetic Fe3O4/g-C3N4 through the electrostatic self-assembly method. Selecting tetracycline (TC) as the target pollutant, using Fe3O4/g-C3N4 and H2O2 developed a heterogeneous optical Fenton system to remove TC under visible light. Fe3O4/g-C3N4 was systematically characterized by SEM, TEM, XRD, FTIR, XPS, DRS, and electrochemical methods. The removal efficiency of 7% Fe3O4/g-C3N4 at pH = 3, H2O2 = 5 mM, and catalyst dosage of 1.0 g/L can reach 99.8%. After magnetic separation, the Fe3O4/g-C3N4 photocatalyst can be recycled five times with minimal efficiency loss. The excellent degradation performance of the prepared catalyst may be attributed to the proper coupling interface between Fe3O4 and g-C3N4 which promotes the separation and transfer of photogenerated electrons. Photogenerated electrons can also accelerate the conversion of Fe3+ to Fe2+, thereby producing more ˙OH. The new Fe3O4/g-C3N4 can be used as a raw material for advanced oxidation of water contaminated by refractory antibiotics.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Dinglong Zhu,Shaomin Liu,Meiling Chen,Jianshu Zhang,Xiaoxiao Wang
A novel, magnetically separable, and stable Fe 3 O 4 /graphitic carbon nitride (g-C 3 N 4 ) nanocomposites were prepared using a facile method. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy. The photocatalysis capability and stability of the as-prepared samples were studied by the degradation of rhodamine B (RhB) under simulated sun irradiation. In addition, the degree of mineralization of RhB and the optimum conditions (pH and dosage of catalyst) for the reaction system were investigated. Tetracycline was used to remove the sensitization effect. Fe 3 O 4 /g-C 3 N 4 nanocomposites not only had higher photocatalytic activity but also obtained magnetic property and stronger stability, which are important for the reuse in water pollutant treatment. Photoelectrochemical activities of Fe 3 O 4 /g-C 3 N 4 were also investigated. The photocurrent enhancement indicates a higher separation efficiency of electrons and holes due to the heterojunction between Fe 3 O 4 and g-C 3 N 4 . RhB degradation improved under acidic conditions and simulated sun irradiation, given that more OH is produced because of the oxidation of Fenton. The h + is a main participant in the degradation of RhB. Active species analysis showed that dissolved oxygen plays an important role in the formation of reactive species ( O 2 − and OH), which are also important participants in the degradation of RhB.
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 Hazardous Materials Advances
·
2021
·
IF 0
Xiao-Yu Zhang,Jing-Jing Wang,Ping Li,Yu-Jia Xiao,Zhao-Yi Tan,Yan-Rong He,Nuzahat Habibul
Herein, Fe 3 O 4 /g-C 3 N 4 composites with different proportions were prepared to remove U(VI) from wastewater through photocatalytic reduction. The morphology, composites, and magnetism of the Fe 3 O 4 /g-C 3 N 4 composites were measured. The characterization results showed that Fe 3 O 4 nanoparticles were well distributed on the surface of g-C 3 N 4 , resulting in the good magnetism and corresponding excellent separation ability of the composites. The U(VI) removal efficiency of the composites with different ratios of Fe 3 O 4 and g-C 3 N 4 was also determined. It was found that Fe 3 O 4 /g-C 3 N 4 with an Fe content of 14% showed the highest U(VI) removal efficiency of 98.7% after 25 min. The photocatalytic reaction rate constant was 0.161 min −1 , which was 2.9 times that of pure g-C 3 N 4 and 2.4 times that of pure Fe 3 O 4 . In addition, after five reaction cycles, the composite showed high photoreduction activity and magnetic properties.
研究领域:
环境科学
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材料科学
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DOI
Journal of Water Process Engineering
·
2024
·
IF 6.3
Junjie Su,Qi Yang,Zhihu Zhang,Ziyue Zhang
Nowadays, Ni/Fe bimetallic nanocomposites have shown great potential for removing Cr(VI). However, the action of Ni 0 in Cr(VI) removal is still controversial, which was studied in this work. In this study, Ni/Fe@Fe 3 O 4 -g-C 3 N 4 (NFFOCN) nanocomposites were applied to remove Cr(VI) from aqueous solutions and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other methods. Batch experiments were conducted to evaluate the Cr(VI) removal performance. Experimental results demonstrated that under optimal operating conditions (pH 5.5, 10 mg/L Cr(VI), 0.3 g/L NFFOCN, 30°C), a Cr(VI) removal efficiency of 90.78% was achieved within 50 min. Theoretical maximum adsorption capacity was calculated to be 36.101 mg/g. Combining experimental and characterization results, it could be concluded that Cr(VI) removal was attributed to the synergistic effect of the NFFOCN components. Ni 0 not only participated directly in the reduction of Cr(VI) as an electron donor, but also converted the corrosion product H 2 of nano-zero-valent iron (nZVI) into highly reducible atomic hydrogen (·H) to remove Cr(VI). Additionally, Ni 0 could form a primary battery with nZVI, facilitating the electron transfer between nZVI and Cr(VI). NZVI and its derivatives, Fe 2+ ions and green rust, were responsible for Cr(VI) reduction. Furthermore, the presence of Fe 3 O 4 and carbon nitride (g-C 3 N 4 ) improved the stability and reactivity of the nanocomposites.
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
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Shafaq Sahar,Akif Zeb,Yanan Liu,Naseeb Ullah,Anwu Xu
We prepared the Fe 3 O 4 /g-C 3 N 4 nanoparticles (NPs) through a simple electrostatic self-assembly method with a 3:97 weight ratio to investigate their Fenton , photo-Fenton and oxidative functionalities besides photocatalytic functionality. We observed an improvement of the Fenton and photo-Fenton activities of the Fe 3 O 4 /g-C 3 N 4 nanocomposites . This improvement was attributed to efficient charge transfer between Fe 3 O 4 and g-C 3 N 4 at the heterojunctions, inhibition of electron-hole recombination, a high surface area, and stabilization of Fe 3 O 4 against leaching by the hydrophobic g-C 3 N 4 . The obtained NPs showed a higher degradation potential for rhodamine B (RhB) dye than those of Fe 3 O 4 and g-C 3 N 4 . As compared to photocatalysis , the efficiency of RhB degradation in the Fenton and photo-Fenton reactions was increased by 20% and 90%, respectively. Additionally, the horseradish peroxidase (HRP) activity of the prepared nanomaterials was studied with 3,3,5,5-tetramethylbenzidinedihydrochloride (TMB) as a substrate. Dopamine oxidation was also examined. Results indicate that Fe 3 O 4 /g–C 3 N 4 nanocomposites offers more efficient degradation of RhB dye in a photo-Fenton system compared with regular photocatalytic degradation, which requires a long time. Our study also confirmed that Fe 3 O 4 /g-C 3 N 4 nanocomposites can be used as a potential material for mimicking HRP owing to its high affinity for TMB. These findings suggest good potential for applications in biosensing and as a catalyst in oxidation reactions.
研究领域:
环境科学
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材料科学
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生物化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 3
·8098-8109
·
IF 5.19
Shan Junyue,Wu Xianliang,Li Caifang,Hu Jiwei,Zhang Zhenming,Liu Huijuan,Xia Pinhua,Huang Xianfei
The photocatalytic degradation of antibiotics requires a good separation efficiency of photogenerated electron–hole pairs and a wide visible light absorption range. Current studies have discussed the successful preparation of ferroferric oxide/graphite carbon nitride/reduced graphene oxide (Fe 3 O 4 /g-C 3 N 4 /rGO). The phase structure and morphology of the Fe 3 O 4 /g-C 3 N 4 /rGO composites were characterized by XRD, HR-TEM, SEM, and EDS. The obtained composites were used to degrade tetracycline hydrochloride (TCH) to evaluate its photocatalytic activity. The effects of four variables on the degradation of TCH were analyzed by the response surface method and artificial intelligence (gradient regression tree, random forest, artificial neural network, etc.). The results showed that the graphite carbon nitride in the catalyst maintained its original structure and that the photocatalytic activity was significantly improved. The degradation rate of TCH was 86.7% under the optimal conditions (the Fe 3 O 4 /g-C 3 N 4 /rGO dosage was 0.1 g, pH = 7.0, the initial concentration of TCH was 20 mg/L, and the visible light irradiation time was 60 min). At the same time, the degradation rate of TCH changed little after the material was used five times, which indicates that the stability and recyclability of the Fe 3 O 4 /g-C 3 N 4 /rGO photocatalyst were excellent. Finally, a possible photocatalytic mechanism of the Fe 3 O 4 /g-C 3 N 4 /rGO photocatalyst is proposed in this paper.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Xue Zhang,Yunsheng Shang,Qi Xie,Xingzhe Hu,Ke Wu,Lu-Lu Qu,Yingqiu Gu
Developing a Surface-enhanced Raman spectroscopy (SERS) method with excellent detecting ability, good recyclability and analyzing multiple pollutants rapidly are critical for evaluation of water quality in emergency pollution affairs. While constructing a multifunctional substrate with these characteristics to realize the application of SERS in water quality monitoring remains a challenge. In this work, a reusable Au@R–Fe 3 O 4 /g-C 3 N 4 SERS substrate is prepared by loading Au nanoparticles (Au NPs) on Fe 3 O 4 nanorings (R–Fe 3 O 4 ) and the formed Au@R–Fe 3 O 4 is further combined with g-C 3 N 4 nanosheets through a simple electrostatic assembly method. The Au@R–Fe 3 O 4 /g-C 3 N 4 nanocomposite presents multifunction of magnetic enrichment, SERS signal enhancement, multiple pollutants analyzing, and photocatalytic activity , which achieves quantitative detection of rhodamine B (RhB), tetracycline hydrochloride (TC), and 4-chlorophenol (4-CP), with detection limits of 5.30 × 10 −9 , 7.50 × 10 −8 , 7.69 × 10 −8 mol/L, respectively. Furthermore, the recyclable detection capability of Au@R–Fe 3 O 4 /g-C 3 N 4 for multi components is demonstrated by the strong SERS signal after 9 cycles of “detection-degradation” processes. Combined with good uniformity and stability, this SERS method based on Au@R–Fe 3 O 4 /g-C 3 N 4 substrate provides a new strategy for the multi-pollutants detection and degradation in water environment.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Shuang Liu,Hong Wu,Huaili Zheng,Weizhen Zhang,Wei Ding,Hong Li,Chao Liu
Sulfite (S(IV))-based advanced oxidation process has attracted widespread attention due to the generation of strongly oxidizing sulfate radicals (SO 4 •− ) and hydroxyl radicals (HO • ) for contaminants remediation. However, the contaminant degradation by singlet oxygen ( 1 O 2 ) through a nonradical pathway was still unclear in the S(IV) activation system. Herein, a magnetic Fe 3 O 4 /g-C 3 N 4 (MCN) composite was synthesized for the utilization as a visible-light catalyst to activate S(IV) under visible-LED (Vis-LED) for the organic degradation . The incorporation of Fe 3 O 4 in g-C 3 N 4 up-regulated the photocatalytic performance in the S(IV) activation for X-3B degradation, and > 98% of X-3B (20 mg L −1 ) was degraded with the degradation rate constant ( k obs ) of 0.110 min −1 within 30 min. The SO 4 •− and 1 O 2 produced in the MCN/S(IV)/Vis-LED system were identified as the primary reactive species through the quenching experiments and electron spin resonance. Interestingly, the light-induced generation of superoxide radical (O 2 •− ) played a negligible role in the formation of 1 O 2 , and most of 1 O 2 was corroborated to be originated from SO 4 •− besides SO 5 •− , which was rarely reported in other S(IV) activation processes. The catalysts before and after utilization were characterized to further elucidate the mechanisms for the S(IV) activation. There were two possible pathways for the S(IV) activation: the electron transfer from S(IV) to the photo-generated holes and the ligand-to-metal charge-transfer (LMCT) within the surface Fe(III)−S(IV) complexes. Furthermore, the MCN/S(IV)/Vis-LED system was of high resistance to complex water matrixes (pH, inorganic anions, etc.), demonstrating its application perspective in the purification of wastewater containing organic pollutants .
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
·
2020
·
IF 3.212
Han-Long Cheng,Hai-Ling Guo,An-Jian Xie,Yu-Hua Shen,Man-Zhou Zhu
At present, cancer has become a major disease threatening human health worldwide. Therefore, developing targeting guided multimode synergetic therapy has become one of the hot spots in current antitumor research and is also a great challenge. Herein, a new Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposite containing magnetic iron oxide (Fe 3 O 4 ) nanoparticles (NPs), lamellar structure of graphite-like carbon nitride (g-C 3 N 4 ) and polypyrrole (PPy) shell with the loaded anti-tumor drug doxorubicin hydrochloride (DOX) was designed and prepared. The monodisperse Fe 3 O 4 nanoparticles (NPs) with the diameter of 20 nm endowed the nanocomposite with the magnetic targeting ability, reducing damage to normal tissues. It is very interesting that the Fe 3 O 4 NPs also possessed photosensitizer function for photodynamic therapy (PDT). The g-C 3 N 4 sheets as the photocatalysis towards the degradation of water for generating O 2 could effectively improve the hypoxia of solid tumors and increase the efficiency of PDT. In addition, PPy has high light-to-heat conversion efficiency, so was chosen for the cancer photothermal therapy (PTT). Finally, an anticancer drug (DOX) was loaded on the nanocomposite because the presence of mesoporous structure. Thus, the prepared Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposites exhibit synergetic chemotherapy/PTT/enhanced PDT antitumor effect. This study provides an inspiration for combining targeting and multimodality to improve the anticancer efficiency.
研究领域:
肿瘤学
·
纳米医学
·
生物材料科学
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Shuisheng Hu,Wenjun Ouyang,Longhua Guo,Zhenyu Lin,Xiaohua Jiang,Bin Qiu,Guonan Chen
A fluorescent biosensor for ochratoxin A was fabricated on the basis of a new nanocomposite (Fe 3 O 4 /g-C 3 N 4 /HKUST-1 composites). Fe 3 O 4 /g-C 3 N 4 /HKUST-1 was synthesized in this work for the first time, which combined HKUST-1 with g-C 3 N 4 to improve its chemical stability. Fe 3 O 4 /g-C 3 N 4 /HKUST-1 composites have strong adsorption capacity for dye-labeled aptamer and are able to completely quench the fluorescence of the dye through the photoinduced electron transfer (PET) mechanism. In the presence of ochratoxin A (OTA), it can bind with the aptamer with high affinity, causing the releasing of the dye-labeled aptamer from the Fe 3 O 4 /g-C 3 N 4 /HKUST-1 and therefore results in the recovery of fluorescence. The fluorescence intensity of the biosensor has a linear relationship with the OTA concentration in the range of 5.0–160.0 ng/mL. The LOD of sensor is 2.57 ng/mL (S/N=3). This fluorescence sensor based on the Fe 3 O 4 /g-C 3 N 4 /HKUST-1 composites has been applied to detect OTA in corn with satisfying results.
研究领域:
食品科学
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分析化学
·
生物传感技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 12
·7469-7479
·
IF 1.134
Ji Dongliang,Zhang Meixing,Geng Xinxiang,Zha Zhenxing,Li Ying,Yang Jing,Cui Shihai
The graphitic carbon nitride (g-C3N4) and the Fe3O4/g-C3N4 magnetic materials were synthesized in this paper. The structures of the materials were confirmed by a series of analysis. The Fe3O4/g-C3N4
was then used as a sorbent to adsorb polychlorinated diphenyl ethers and polychlorinated biphenyls. Different extraction conditions were examined, including adsorbent amount, salinity, pH of the sample matrix, adsorption time, reaction temperature, elution solvent and preconcentration factor.
The maximum recoveries were obtained by employing methanol to desorb pollutants on 40.0 mg Fe3O4/g-C3N4 in 120.0 mL environmental water with a salinity of 5% (w/v) at a pH of 7 at 25 °C within 10 min. Using the optimized parameters, the detection
limits of the method are between 0.01 and 0.04 μ · L−1 with a satisfying linear relationship. The adsorbent can be recycled at least 10 times with no significant reduction in the extraction efficiency.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）