Molecular Catalysis
·
2023
·
IF 4.6
Liping Tan,Yamei Sun,Changjun Yang,Bingguang Zhang,Kejian Deng,Xiaofeng Cao,Yanchuan Guo
Photocatalytic selective oxidation of glycerol to value-added C 3 products is a promising strategy for the valorization of glycerol. In this work, an inorganic/organic composite material by integrating zinc oxide (ZnO) with iron thioporphyrazine (FePz) was prepared to act as photocatalyst for photocatalytic oxidation of glycerol in water. The effects of FePz surface modification on the physicochemical properties and photocatalytic performance of ZnO were systemically studied. More importantly, the integration of ZnO with FePz could markedly improve the visible light absorption ability and effectively promote the separation of photogenerated charges. Meanwhile, introducing FePz onto the ZnO surface was beneficial to the adsorption capacity of glycerol. Just because of this, ZnO/FePz composite exhibited excellent photocatalytic activity for oxidizing glycerol in water, C 3 products including glyceraldehyde and dihydroxyacetone were obtained from this composite photocatalytic system. Additionally, the active species responsible for glycerol oxidation were also determined.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jawad Ali,Dan Li,Ajmal Shahzad,Muhammad Wajid Ullah,Jerosha Ifthikar,Muhammed Asif,Chen Yanan,Xie Lei,Zhuqi Chen,Songlin Wang
The Fe-based materials were considered very attractive for the treatment of wastewater using peroxymonosulfate (PMS) activation. However, the difficulties to restore the active Fe 2+ oxidation state restrict them to attained sustainable efficiency. In this work, a new strategy was introduced to accelerate the regeneration of Fe 2+ state through constructing an electron-rich MoS 4 2− centre in the inter-layers of FeMgAl layered double hydroxide (MoS 4 -LDH) catalyst. The dual centre MoS 4 -LDH catalyst was found more efficient as clear from the observed atrazine (ATZ) degradation rate of 0.117 min −1 , 100 times higher than the Fe 3+ /PMS or 25–50 times higher than the Fe based single centre NO 3 -LDH/PMS, CO 3 -LDH/PMS or S 2 O 4 -LDH/PMS systems, respectively. This boosted efficiency was related to the electron-rich MoS 4 2− centre which allows the constant electron transfer to reduce the electron-deficient Fe 3+ center at MoS 4 -LDH surface and thereby accelerating the Fe 2+ /Fe 3+ redox cycle during reaction. Furthermore, the MoS 4 -LDH/PMS system exhibited a broader effective pH (3.0–9.0), good stability and minimum influence of background electrolyte or organic matter. The degradation pathway of ATZ based on free radical (SO 4 – and OH), involving the redox cycles of Fe 3+ /Fe 2+ and Mo 6+ /Mo 4+ was proposed for the activation of PMS . This work highlighted the essential role of MoS 4 2− moiety, to accelerate the Fe 3+ reduction at the surface of the LDH catalyst through the continuous feeding of electrons.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Luwei Wang,Chenliu Tang,Pengfei Huang,Xiang Hu,Zhirong Sun
The widespread detection and potential adverse effects of antibiotics in the aquatic environment call for effective treatment technology. Electro-Fenton is a promising strategy, but the preparation of efficient and stable cathodes is still challenging. In this study, a novel metal-organic framework (MOF)-derived N-doped cathode Fe/Cu-C400Ar was synthesized successfully for the degradation of ceftazidime (CAZ) in heterogeneous electro-Fenton (hetero-EF) system. The doping of copper could enhance electrocatalysis with a high electrochemical surface active area and low resistance. Fe/Cu-C400Ar cathode achieved CAZ removal efficiency of 99.5 ± 0.4% within 120 min, and it exhibited excellent stability after six recycle runs. Quenching experiments and electron paramagnetic resonance (EPR) tests proved that the primary species was hydroxyl radical during the CAZ degradation. In addition, the degradation pathway of CAZ was proposed including the cleavage of the pyridine ring and the shedding of the thiazole ring. Moreover, the prediction of intermediates toxicity by Ecological Structure Activity Relationships (ECOSAR) software indicated the environmentally friendly features of the CAZ degradation process. This study provided a promising cathode for the electrocatalytic degradation of antibiotic wastewater in hetero-EF system.
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Journal of Superconductivity and Novel Magnetism
·
2023
·Vol. 36
·期 2
·733-743
·
IF 1.8
Wu Fangyi,Liu Zhonghao,Dong Yaqiang,Zhang Ruiheng,He Aina,Ling Yufan,Li Jiawei,Liu Xincai
Reducing the low-frequency loss (≤ 1 kHz) of the soft magnetic powder cores (SMPCs) while maintaining high saturation magnetic induction ( B s ) is beneficial to the high efficiency and energy saving of motor applications. Herein, the effects of silicone resin content (SI), compaction pressure, and annealing temperature on the magnetic softness, microstructure, and magnetic domains of Fe-6.5 wt.%Si SMPCs were systematically studied. The SMPCs with 1 wt.% SI content and pressed at 1800 MPa not only have good forming ability but also exhibit low total loss and high B s . According to the loss separation at 1 T and 1 kHz, the hysteresis loss accounts for more than 75% of the total loss. Annealing at 850 °C induces dense and large recrystallized grains with large-angle grain boundaries and easily mobile domain walls, resulting in low hysteresis and total loss. A higher temperature of 950 °C damages the cladding layer and causes direct powder-to-powder contact, which thus slightly increases hysteresis and eddy loss. The correlation between the core loss, microstructure, and magnetic domain provides a reference for the development of high- B s and low-loss SMPCs for high-efficiency motors.
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Materials Today Communications
·
2023
·
IF 3.8
Yushu Han,Rui Bao,Jianhong Yi,Hongdong Li,Liang Liu,Shuyu Huang,Zhaojie Li,Wenfu Zhang,Deqi Min
Carbonized polymer dots (CPDs) have drawn a lot of attention in the past ten years because of their excellent selectivity and sensitivity. In this study, tungsten was doped into CPDs (W-CPDs) using a simple hydrothermal technique for the first time. With an excitation/emission maximum of 365/455 nm and excitation-independent emission, W-CPDs exhibit blue fluorescence and have an average particle diameter of 2.33 nm. Because of the dynamic quenching between Fe (III) and W-CPDs, there is a good linear relationship between the Fe (III) concentration and the limit of detection (LOD) of 0.012 μM for W-CPD fluorescence intensity. The intensity of the W-CPDs fluorescence is also found to be linearly correlated with pH values between 5.0 and 10.0. This technique enables quick detection of Fe (III) in drinking water and is expected to lower the risk of Fe (III) ingestion by humans. In addition, the creation of fluorescent flexible devices and information encryption are fascinating applications for W-CPDs.
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Defence Technology
·
2023
·
IF 5.1
Er-hai An,Xiao-xia Li,Cun-juan Yu,Ying-xin Tan,Zi-jun Fan,Qing-xia Li,Peng Deng,Xiong Cao
Fe/N-based biomass porous carbon composite (Fe/N-pCarbon) was prepared by a facile high-temperature carbonization method from biomass, and the effect of Fe/N-pCarbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied. Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors. Fe/N-pCarbon was prepared simply by the high-temperature carbonization method. It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4. The heat release of DAP-4/Fe/N-pCarbon by DSC curves tested had increased slightly, compared from DAP-4/Fe/N-pCarbon-0. The decomposition temperature peak of DAP-4 at the presence of Fe/N-pCarbon had reduced by 79°C from 384.4°C (pure DAP-4) to 305.4°C (DAP-4/Fe/N-pCarbon-3). The apparent activation energy of DAP-4 thermal decomposition also had decreased by 29.1 J/mol. The possible catalytic decomposition mechanism of DAP-4 with Fe/N-pCarbon was proposed.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Hui Shu,Tingrun Lai,Zhichao Yang,Xuechun Xiao,Xiumin Chen,Yude Wang
High sensitivity and ultra-trace detection of imidacloprid are important and challenging in the field of food. In this study, we prepared a Fe-rich FeCoNi-MOF in-situ modified nickel foam working electrode by one-step hydrothermal method, and achieved a highly sensitive detection of the imidacloprid. The characterization techniques confirmed that Fe-rich FeCoNi-MOF had excellent crystallinity, tighter structure, and exposed rich active sites. The detection results showed that Fe-rich FeCoNi-MOF electrochemical sensor had a minimum detection limit of 0.04 pmol/L (100 times lower than that of the bioelectrochemical sensors), a wide response range (1 pmol/L–120 μmol/L), and high sensitivity (124 μA pmol/L -1 cm −2 ). These advantages of the electrochemical sensor were revealed theoretically by the valence change of active metal and the first principle calculation. Lastly, the Fe-rich FeCoNi-MOF electrochemical sensor was applied to detect imidacloprid in apple, fresh tea leaves, tomato, cucumber, and had an excellent recovery of 98–102.8 %.
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PubMed
高影响因子
DESALINATION
·
2023
·
IF 9.9
Yufang Li,Shu Wang,Haojie Ding,Kang Xiao,Xia Huang
Iron fouling induced by residual Fe(III) was frequently reported in reverse osmosis operation. However, previous studies mainly focused on inorganic precipitation or Fe-organics coupling, yet ignoring its potential effects on microbes. In this study, by using ultrafiltration effluent (~2.3 mg/L Fe(III)) as the feed, a long-term fouling experiment was conducted to investigate how excessive Fe influenced biofouling. Results showed, under continuous stresses of Fe-deposits (eventually >40 μg/cm 2 ), fouling development clearly exhibited a three-stage process, where Fe-metabolism, extracellular polymeric substance synthesis and quorum sensing (QS) were intricately intertwined. Compared to Early (3 h–2 d) and Developed (4 d–10 d) Stage, ecological interaction network in Mature Stage (12 d–30 d) was shifted and highly modularized, with iron-depositing genera (such as Leptothrix ) in emerging Fe-metabolic modules as the core nodes . Foulant structure was also more porous. Moreover, by detecting signal molecules, the upregulation of QS was unraveled. Functional gene co-occurrence analysis further revealed the profound involvement of QS in enhancing polysaccharides (PS) secretion and ferric-reduction, which were verified by the constantly rising PS proportion and Fe(II)/Fe(III) ratio on surface. Therefore, more attentions should be paid to residual Fe-issues, as it not only affected inorganic fouling, but also significantly altered biofouling behaviors.
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ADVANCED MATERIALS
·
2023
·Vol. 35
·期 14
·2211790
·
IF 29.4
Xiang Miao,Wenxing Chen,Shuning Lv,Anran Li,Yanhong Li,Qinghua Zhang,Yonghai Yue,Hewei Zhao,Limin Liu,Shaojun Guo,Lin Guo
Precisely tailoring the oxidation state of single-atomic metal in heterogeneous catalysis is an efficient way to stabilize the single-atomic site and promote their activity, but realizing this approach remains a grand challenge to date. Herein, a class of stable single-atomic catalysts with well-tuned oxidation state of Pt by forming Pt Fe atomic bonds is reported, which are supported by defective Fe 2 O 3 nanosheets on reduced graphene oxide (PFARFNs). These as-synthesized materials can greatly enhance the catalytic activity, stability, and selectivity for the diboration of alkynes. The PFARFNs exhibit high conversion of 99% at 100 °C with an outstanding turnover frequency (TOF) of 545 h −1 , and a relatively high conversion of 58% at room temperature (25 °C) with a TOF of 310 h −1 , which has been hardly achieved previously. Through both experimental and theoretical investigation, it is demonstrated that the fast electron transfer from Fe to Pt in Fe–Pt–O atomic sites in PFARFNs can not only stabilize the single-atomic Pt, but also significantly improve their catalytic activity.
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Chemosensors
·
2023
·Vol. 11
·期 2
·114
·
IF 4.2
Hao Liu,Qing Zhang,Ning Bao,Shou-Nian Ding
As the most widely used disposable paper-based diagnostic tool in the world, immunochromatographic test strips (ICTS) have occupied more and more positions in the field of rapid diagnosis due to their ease of operation and affordability. Therefore, the development of an easily prepared, sensitive, and accurate signal reporter is of great significance for the detection of some low-abundance biomarkers in clinical diagnosis. Herein, Mg/Fe layered double hydroxide nanoflowers (MF NFs) were selected as adsorption templates and sulfhydryl-functionalized, followed by one-step loading of hydrophobic CdSe/ZnS quantum dots in the organic phase via a metal-thiol covalent bond. After coating the reporter with branched polyethyleneimine (PEI), a novel ICTS fluorescent reporter was prepared. The modification of PEI not only improved the hydrophilicity of MF@CdSe/ZnS NFs but also introduced amino functional groups on the surface of the reporter for subsequent conjugation with antibodies. X-ray photoelectron spectroscopy, UV-vis absorption, X-ray diffraction, fluorescence spectroscopy, and infrared spectroscopy were used to characterize the composition of MF@CdSe/ZnS NFs. Under the optimal experimental conditions, the detection range of MF@CdSe/ZnS@PEI-ICTS for the model analyte HCG was 0.1–500 mIU/mL, and the limit of detection (LOD) reached was 0.1 mIU/mL. The potential for practical application was validated by the detection of HCG in spiked healthy human serum, showing overall recoveries between 90.48 and 116.1% with coefficients of variation that ranged from 3.66 to 12.91%.
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ACS ES&T Engineering
·
2023
·
IF 7.1
Junna Yan,Mengyu Ma,Keyi Liu,Yang Bao,Feihu Li
Efficient removal and recovery of phosphorus (P) from wastewater is critical for addressing both phosphate rock depletion and eutrophication-related deterioration of surface water quality. Herein, we present a promising platform approach integrating cerium-doped NH2-MIL-101(Fe) with melamine sponge (MS) scaffolds for rapid and high-efficiency recovery of P from wastewater. The as-prepared MIL-101@sponge composites (denoted as MIL-101@CS, MIL-101@PVDF, and MIL-101@SDBS, respectively) are featured by flexibility and stability according to many characterization techniques. Batch adsorption of P over these composite adsorbents indicates that these MIL-101@sponge composites exhibit a maximum adsorption capacity (e.g., 253.66 mg g–1 for MIL-101@CS) at the optimum pH of 6.0 and that adsorption equilibrium can be attained within 150 min and well described by the pseudo-second-order kinetic model. In addition, these composites show a high selectivity for P over carbonate and other common monovalent anions under environmentally relevant conditions. The results of desorption and recycling tests indicate that MIL-101@CS retains good adsorption and desorption efficiency even in a much short operating time (i.e., 5 min), which allows such a composite to be applied in enriching and recovering P efficiently from wastewater via a rapid adsorption/desorption operation. Moreover, the high feasibility of MIL-101@CS in actual scenarios was validated by efficiently enriching the P from a sludge dewatering liquid. Furthermore, the main mechanisms for P adsorption are elucidated from various microstructural characterizations. Overall, this work presents a strategy of integrating MIL-101 with sponge scaffolds for rapidly and efficiently recovering P from wastewater, which may be potentially extended to the recovery of other value-added elements of interest from waste streams.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2022
·Vol. 220
·期 2
·2200581
·
IF 2.17
Linlin Dang,Kai Zhang,Qiguan Wang,Changhua Xu,Sumin Wang
Active bifunctional electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are badly required for high-efficiency zinc–air batteries (ZABs). Herein, a Fe-alloyed MoNi nanohybrid (MoNiFe) as bifunctional catalyst is reported. The alloyed MoNiFe architecture with the decreased size compared with MoNi is obtained by a hydrothermal reduction method, which enhances the exposed active sites and promotes the charge transfer. Accordingly, MoNiFe exhibits good bifunctionality, with a positive half-wave potential (0.896 V) near Pt/C (0.812 V) in ORR reaction and a low overpotential (0.295 V) similar to IrO 2 (0.29 V) in OER process. The as-derived rechargeable ZAB cells based on the bifunctional MoNiFe catalyst show the peak power density of 58 mW cm −2 with a high open-circuit voltage of 1.319 V. Thus, this work paves a new alloying avenue for synthesizing effective bifunctional electocatalysts for ZABs.
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