JOURNAL OF NANOPARTICLE RESEARCH
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2024
·Vol. 26
·期 9
·1-15
·
IF 2.1
Yin Yanbing,Zhang Xueli,Jiang Bei,Wang Zhou,Feng Yongming,Li Xueying
Developing efficient catalysts for visible light reactions is vital in the field of photocatalysis. This study focuses on the synthesis of novel ternary composites (α-DMACoPc/TiO 2 /MIL-101 (Fe)) by leveraging the excellent adsorption properties of MIL-101 (Fe), the photosensitizing capabilities of phthalocyanine, and the photocatalytic potential of TiO 2 . The nanocomposites’ structural and optical attributes were thoroughly analyzed. X-ray powder diffraction (XRD) was utilized to showcase the crystalline nature of the composites. Furthermore, Fourier transform infrared (FT-IR) studies confirmed the formation of ternary nanocomposites. Optical absorption investigations demonstrated the tuning of the optical band gap from the UV to the visible range. The results indicated that nearly 94% of the organic material was decomposed after 150 min of exposure to simulated sunlight from a xenon lamp. This high efficiency can be attributed to the synergistic interaction among the composites, enhancing light absorption. The composite’s robust stability was evidenced through cyclic tests. Valuable information was provided to advance the design and synthesis of photocatalysts consisting of metal–organic frameworks synergized with semiconductors. Exploring the possibility of mesoporous materials was based on MOFs for photodegradation of organic pollutants. The photocatalytic degradation of organic pollutants by MOFs mesoporous materials was also investigated. The potential of composite materials in the field of dye degradation of industrial waste is confirmed. The good recycling photocatalytic reusability indicates the promising application of this photocatalyst. Graphical Abstract
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Journal of Environmental Sciences
·
2024
·
IF 5.9
Qianyu Xu,Haoyang Fu,Jiyuan Gu,Liyu Lei,Lan Ling
The overuse of antibiotics and antitumor drugs has resulted in more and more extensive pollution of water bodies with organic drugs, causing detrimental ecological effects, which have attracted attention towards effective and sustainable methods for antibiotics and antitumor drug degradation . Here, the hybrid nanomaterial (g-C 3 N 4 @Fe/Pd) was synthesized and used to remove a kind of both an antibiotic and antitumor drug named mitoxantrone (MTX) with 92.0% removal efficiency, and the MTX removal capacity is 450 mg/g. After exposing to the hybrid material the MTX aqueous solution changed color from dark blue to lighter progressively, and LC-UV results of residual solutions show that a new peak at 3.0 min (MTX: 13.2 min) after removal by g-C 3 N 4 @Fe/Pd appears, with the simultaneous detection of intermediate products indicating that g-C 3 N 4 @Fe/Pd indeed degrades MTX. Detailed mass spectrometric analysis suggests that the nuclear mass ratio decreased from 445.2 (M + 1H) to 126.0 (M + 1H), 169.1 (M + 1H), 239.2 (M + 1H), 267.3 (M + 1H), 285.2 (M + 1H), 371.4 (M + 1H) and 415.2 (M + 1H), and the maximum proportion (5.63%) substance of all degradation products (126.0 (M + 1H)) is 40-100 times less toxic than MTX. A mechanism for the removal and degradation of mitoxantrone was proposed. Besides, actual water experiments confirmed that the maximum removal capacity of MTX by g-C 3 N 4 @Fe/Pd is up to 492.4 mg/g (0.02 g/L, 10 ppm).
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Nano Today
·
2024
·
IF 13.2
Ke Zhu,Wenlei Qin,Yuwen Chen,Xiaoyin Liang,Haoran Xin,Zhihan Huang,Hector F. Garces,Yaping Gan,Mika Sillanpää,Rongliang Qiu,Guoqing Guan,Kai Yan
Constructing the coordination environment of single-atom catalysts (SACs) can be an attractive technical strategy to regulate the generation of reactive oxygen species for Fenton-like reactions. Herein, we have constructed an asymmetric coordination of Fe single-atom catalyst (Fe SA -NS-PCNS) with abundant N-Fe-S bridge (Fe SA -N 3 S 1 ) for robust Fenton-like reactions. 82.5 % of singlet oxygen ( 1 O 2 ) selectivity and high turnover frequency of bisphenol A degradation (0.568 min −1 ) were achieved at mild conditions. Experimental works and theoretical analyses illustrated that S doping breaks the inert environment of the original N-Fe-N symmetric coordination equilibrium and modulates the electron density of the atomic Fe center, which is beneficial for boosting PMS adsorption and reducing the energy barriers of vital *OH and *O intermediates. The coupling between the Fe SA -N 3 S 1 interface and peroxymonosulfate molecule boosts in-situ electron transfer through the N-Fe-S bridge, which induces more electron flow from the low valence Fe to OH* on the surface of Fe-*O-H, forming a high yield of 1 O 2 . Moreover, we designed the Fenton-like reactions by Fe SA -NS-PCNS membrane reactor for an efficient contaminant removal rate of over 90 % even after 11 cycles. This work provides a novel perspective on developing SACs with asymmetric coordination to regulate reactive oxygen species for the treatment of organic contaminants in water bodies.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Weijun Zhou,Ping Wang,Zhipeng Chen,Xuefei Wang,Huogen Yu
Traditionally, nano-titanium dioxide (TiO 2 ) is widely regarded as an effective hydrophilic material due to its certain amount of hydroxyl groups. However, the limited hydroxyl groups and the poor network structure of the TiO 2 surface result in suboptimal hydrophilicity and stability. In this study, a stable and long-lasting superhydrophilic Fe-coordinated tannic acid (TA) network is constructed by introducing TA and Fe 3+ to form a hydroxyl-rich 3D network on the surface of TiO 2 . The hydrophilicity test results demonstrated that the Fe-TA/TiO 2 film exhibited exceptional superhydrophilic property with a water contact angle of 1.3°, significantly lower than that of the TA/TiO 2 film (18.2°) and the TiO 2 film (65°). Importantly, it maintained long-lasting superhydrophilicity (water contact angle < 10°) for more than 16 days. The superhydrophilicity and long-term stability of the Fe-TA/TiO 2 film can be attributed to the abundance of hydroxyl groups and the stable Fe-coordinated TA 3D networks. This study presents a promising methodology for optimizing the TiO 2 surface through metal-organic coordination for enhanced long-term superhydrophilicity.
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Toxics
·
2024
·Vol. 12
·期 3
·230
·
IF 3.9
Lingli Min,Yahui Ma,Bi Zhang,Dulan He,Jinhua Chen,Xuerong Li,Shuhua Wang,Yulang Chi
Efficient removal of extremely mobile and toxic As(III) from water is a challenging but critical task. Herein, we developed a functionalized sorbent of chitosan nanofiber with iron–manganese (Fe-Mn@CS NF) using a one-step hybrid electrospinning approach to remove trace As(III) from water. Batch adsorption studies were performed to determine the adsorption efficiency under a variety of conditions, including contact time, starting concentration of As(III), ionic strength, and the presence of competing anions. The experimental results demonstrated that the concentration of As(III) dropped from 550 to less than 1.2 µg/L when using 0.5 g/L Fe-Mn@CS NF. This demonstrates the exceptional adsorption efficiency (99.8%) of Fe-Mn@CS NF for removing As(III) at pH 6.5. The kinetic tests revealed that the adsorption equilibrium was reached in 2.6 h, indicating a quick uptake of As(III). The ionic strength effect analysis showed that the adsorbed As(III) formed inner-sphere surface complexes with Fe-Mn@CS NF. The presence of SO42−or F−had a negligible impact on As(III) uptake, while the presence of PO43−impeded As(III) absorption by competing for adsorption sites. The exhausted sorbent could be effectively regenerated with a dilute NaOH solution. Even after 10 cycles of regenerating Fe-Mn@CS NF, the adsorption efficiency of As(III) in natural groundwater was maintained over 65%. XPS and FTIR analyses show that the presence of M–OH and C–O groups on the sorbent surface is essential for removing As(III) from water. Overall, our study highlights the significant potential of Fe-Mn@CS NF for the efficient and quick elimination of As(III) from water.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 26
·1-11
·
IF 2.8
Li Xiao-Bing,Ma Xiao-Ye,Zhang Xue-Feng,Jia Guo-Liang,Zhao Zhao-Ye,Wang Jun-Chuan,Wang Hui,Wu Xiang-Feng
In this work, PCN-224(Fe) porphyrin-based metal–organic frameworks and a Poly(ionic liquids) (PILs) were used to prepare PCN-224(Fe)@PIL(Cl − ) composite films by UV polymerisation. The structure, morphology, chemical composition, and electrochemical properties of the as-prepared composite film were investigated. PCN-224(Fe) was coated with a kind of P(1-vinylpyridinium chloride as monomer) on the outside to improve the electron transfer efficiency, while an electrochemical system was employed to catalysis the persulfate (PS) decomposition for the efficient degradation of tetracycline (TC). Because of the cathodic reduction reaction, the continuous redox cycle between Fe 3+ /Fe 2+ was facilitated, which enhanced the degradation activity of persulfate on tetracycline. The PCN-224(Fe)@PIL(Cl − ) composite demonstrated a superior electrocatalytic degradation efficiency of 95.8% in just 40 min for the TC model pollutant, surpassing the 63.3% efficiency of pure PCN-224(Fe) within 60 min. This work shows a successful example of using PILs to enhance catalytic degradation activity and points out a direction of preparation of catalysts for activating persulfate (PS).
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IONICS
·
2025
·
IF 2.6
Jiang Zhuwu,Tu Zhehan,Xu Dongdong,Chen Jinfeng,Yang Jiahan,Zhang Fengying,Lin Weixin,Bai Xue,Zhang Hongyu
In the process of sterilization and disinfection, chemical reagents will react with natural organic matter and inorganic matter in water, and inevitably generate disinfection byproducts. These harmful substances are carcinogenic, teratogenic and mutagenic, and their content is low and difficult to detect. Therefore, in this study, we prepare Fe/CoFe-LDH electrodes by in-situ co-precipitation method, and their special structures and morphologies are used to achieve efficient removal of disinfection byproducts. On this basis, the prediction model of trichloroacetamide removal rate is constructed by using the backpropagation neural network, and the prediction model is used to predict the trichloroacetamide removal rate under different experimental parameters and the experiment is verified. The optimal process conditions are obtained, and the maximum trichloroacetamide removal rate is up to 81.62%. The feasibility of the data analysis and processing method based on machine learning in the prediction of disinfection by-products in drinking water is effectively proved.
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ENERGY
·
2024
·
IF 9
Xudong Yang,Huan Zhang,Zhiping Zhang,Yameng Li,Hong Liu,Feng Zhang,Guanning Xiang,Quanguo Zhang
The aim of this study was to analyze the effects of CaTiO 3 photocatalysts doped with different concentrations of Fe on the biohydrogen production process by photo-fermentation using corn stover as the substrate. The experimental results showed that the maximum cumulative hydrogen production and the maximum rate of hydrogen production were obtained when the doping concentration was 6 % (g/g) (380.8 mL, 26.4 mL/h), which were 63.4 % and 203.4 % higher, respectively, than those of the blank control group (233 mL, 8.7 mL/h). The substrate conversion rate was 32.82 %. Iron-doped CaTiO 3 lowered the oxygen reduction potential in the fermentation system to provide a suitable reduction environment for the growth and fermentation of photosynthetic bacteria . The lowest redox potential observed was −393.5 mV for 6 % iron-doped CaTiO 3 . Thermogram analysis revealed a strong correlation between cumulative hydrogen production and redox potential. Additionally, the analysis of soluble small molecules showed that iron-doped CaTiO 3 could inhibit the production of ethanol from glycolysis during fermentation and promote the utilization of small molecule acids.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 3
·953
·
IF 4.9
Jianan Chen,Longjiong Chen,Leliang Wu,Chengyu Yan,Ningxin Sun,Guilong Peng,Shaogui Yang,Huan He,Chengdu Qi
Currently, iron-catalyzed low-valent sulfur species processes are regarded as potentially valuable advanced oxidation processes (AOPs) in wastewater treatment. As a commonly used low-valent sulfur species in the food industry, metabisulfite (MBS) can undergo decomposition to bisulfite when dissolved in water. Therefore, the combination of MBS with dissolved Fe(III) at environmentally relevant concentrations is proposed in this study to accelerate organic contaminants degradation while simultaneously minimizing the production of iron sludge. The results show that the Fe(III)/MBS process could degrade various organic contaminants, including acid orange 7 (AO7), and the removal efficiency of AO7 obeyed the pseudo-first-order kinetic. The rate constant values exhibited variations depending on the initial concentrations of Fe(III) and MBS, pH values, as well as the reaction temperature. Moreover, the contribution of HO•and SO4•−to AO7 degradation was estimated as 51.59% and 46.45%, respectively. Furthermore, Cl−showed a minimal effect while HCO3−and humic acid resulted in a significant inhibitory effect on AO7 degradation. The satisfactory degradation of AO7 was achieved in three real water bodies. Ultimately, the results of gas chromatography–mass spectrometry and the theoretical calculations greatly facilitate the proposal of AO7 degradation pathways, including N=N cleavage, hydroxylation, and hydrogen abstraction. The findings of this study indicate that the Fe(III)/MBS process may be a promising AOP for further application in organic contaminants degradation during wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ertai Zhang,Shuyan Guan,Haojun Fan,Yongxin Wang,Hui Yan,Lei Guo,Xuedong Zhai,Carlos A. Martínez Huitle,Jing Ding
Sulfite has been proven to promote advanced oxidation processes (AOPs) to achieve low-cost and efficient degradation of contaminants, serving as an alternative to persulfate. In this study, a novel composite Fe/Mn@carbon felt (CF) electrode was successfully constructed to remove carbamazepine (CBZ). The capacity of the Fe/Mn@CF anode to activate sulfite was evaluated under various electrode preparation conditions and operating parameters. Results clearly indicated that the complete removal of CBZ was achieved in Fe/Mn@CF anode activated sulfite system under the specific conditions including Na 2 SO 4 electrolyte concentration of 50 mM, sulfite dosage of 1 mM, initial pH of 7, and current density of 1 mA/cm 2 . The capacity of Fe/Mn@CF anode for sulfite activation was further presented by its excellent reusability and stability in terms of CBZ removal and metal ion release. Both radical and non-radical pathways were significantly contributed to the CBZ removal, including OH, SO 4 · - , O 2 · - , 1 O 2 , and other reasons. Density functional theory (DFT) calculations demonstrated that Fe-Mn bimetals effectively promoted sulfite activation, with the electric field further boosting the process of Fe-Mn valence cycle and oxidation. Overall, the novel Fe/Mn@CF activated sulfite system exhibited outstanding performance and had great potential for sustainable use in removing organics.
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JOURNAL OF HAZARDOUS MATERIALS
·
2010
·
IF 4.144
Zhanqiang Fang,Xinhong Qiu,Jinhong Chen,Xiuqi Qiu
Polybrominated diphenyl ethers have been identified as a new class of organic pollutants with ecological risk due to their toxicity, bioaccumulation, and global distribution. Proper remediation technologies are needed to remove them from the environment. In this paper, Ni/Fe bimetallic nanoparticles were synthesized by chemical deposition and used to degrade decabromodiphenyl ether (BDE209). The characteristics of Ni/Fe nanoparticles were analyzed by transmission electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, and Brunnaer–Emmett–Teller surface area analysis. Ni/Fe bimetallic nanoparticles with diameters in the order of 20–50 nm could effectively degrade BDE209 in the solvent (tetrahydrofuran/water). Influence factors, such as Ni/Fe nanoparticle dosage, initial BDE209 concentration, and Ni loading, on the removal of BDE209 were studied. The results indicated that the degradation of BDE209 followed pseudo-first-order kinetics, and the degradation rate of BDE209 increased with increasing the amount of nano Ni/Fe particles, Ni/Fe ratio, and decreasing the initial concentration of BDE209. Through analyzed the mass balance of the BDE209 removal, degradation was the main process of BDE209 removal. The mechanism of debromination was deduced by analyzing the reaction products using gas chromatography–mass spectrometry, the bromide ion in the solution and varying the solvent conditions. Stepwise hydrogen reduction is the main process of debromination, and the hydrion play an important role in the reaction. Moreover, the experiment of long term performance and leaching of Ni were also carried out to test the stability and durability of Ni/Fe nanoparticles in BDE209 degradation.
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Progress in Natural Science-Materials International
·
2024
·
IF 4.8
Ping-an Yang,Rui Cai,Haibo Ruan,Nanqing Zhang,Xin Huang,Rui Li,Yuxin Zhang,Yi Lu,Zhihao Zhou
Controlled fabrication of materials by surface modification techniques has been a hot research topic. In this paper, one-dimensional (1D) core-shell structure Fe@Co nanowires (NWs) were successfully prepared by anchoring 0-dimensional (0D) Co nanoparticles on 1D Fe NWs based on the in situ reduction method. The electromagnetic parameters of the specimens at a filler mass fraction of 25 wt% were tested and the microwave loss mechanism was deeply analyzed. Binary magnetic metals in a core-shell structure have excellent multi-band microwave absorption capability (S-band, X-band and Ku-band). This is due to the heterogeneous interface and magnetic coupling effects tuning the dielectric and magnetic loss. This study offers a workable plan for creating effective multi-band magnetic metal-based microwave absorbers.
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