APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Atian Xie,Jiuyun Cui,Jin Yang,Yangyang Chen,Jihui Lang,Chunxiang Li,Yongsheng Yan,Jiangdong Dai
Herein, a graphene oxide/MIL-88A(Fe) (GO/M88A) membrane was prepared for the first time by a facile vacuum filtration method. The intercalation of photo-Fenton catalytic M88A into GO nanosheets can not only regulate 2D nanochannels, but also endow the membrane with photo-Fenton catalytic activity. Accordingly, the GO/M88A membrane showed an enhanced separation efficiency and flux (more than 6 times that of GO membrane) based on synergistic separation/photo-Fenton processes. Importantly, the GO/M88A membrane maintained high separation efficiency (97.87 %) and almost constant flux even after 12 cycles of MB separation. The GO/M88A membrane can also be used to treat real textile wastewaters. Moreover, the membrane was directly used as catalyst for photo-Fenton catalytic degradation of contaminants with high degradation efficiency for MB (98.81 %) and BPA (97.27 %). Therefore, the results indicate that this novel GO/M88A membrane has excellent separation performance, stability and photo-Fenton activity and can be used as a potential membrane for water purification and environmental protection applications.
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JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Bo Ye,Ronghua Jiang,Zebin Yu,Yanping Hou,Jun Huang,Boge Zhang,Yiyi Huang,Yalan Zhang,Runzhi Zhang
The preparation of Pt quantum dots (Pt QDs) is an effective way that can solve the high cost problem by reducing the high dosage requirement of noble metal Pt. On the other hand, organic metal framework (MOF) can be used for the stabilization of metal nanoparticles with small size and uniform dispersion. Herein, we successfully synthesized a bifunctional electrocatalyst via a facile one-step hydrothermal treatment. Pt QDs cores are uniformly coated with Fe-MOF nanosheet arrays shell (Pt QDs @Fe-MOF) with a porous cuboids structure on Ni foam (NF). With the quantum size and core-shell structure, the self-assembled porous cuboids of Pt QDs @Fe-MOF exhibited perfect electrochemical performance for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and overall water splitting. Particularly, the electrocatalyst with ultralow content of Pt QDs (1.84 μg cm −2 ) only needed the overpotential of 33 mV and 191 mV to achieve 10 and 100 mA cm −2 in 1 M KOH, respectively. In addition, the Pt QDs @Fe-MOF/NF electrodes possessed remarkable activity and stability to deliver a current density of 10 mA cm −2 at 1.47 V for overall water splitting of at least 100 h.
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SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Ning Xia,Dehua Deng,Xiangsheng Mu,Ang Liu,Jiaxun Xie,Dandan Zhou,Ping Yang,Yun Xing,Lin Liu
This work reported a novel redox cycling in which pyrroloquinoline quinone (PQQ) promoted the reduction of Fe(III)-ferrozine by tris(2-carboxyethyl)phosphine (TCEP). Specifically, PQQ was reduced into pyrroloquinoline quinol (PQQH 2 ) by TCEP, and then the produced PQQH 2 reduced colorless Fe(III)-ferrozine into dull red Fe(II)-ferrozine. The redox cycling was employed for development of colorimetric immunosensors through the generation of colorful Fe(II)-ferrozine. Mesoporous silica nanoparticle (MSN) was used as the carrier for both PQQ and recognition antibody through electrostatic interactions. Magnetic bead (MB) was used as the support for the immobilization of capture antibody. After the sandwich-type immunoreactions and magnetic separation, the MSN-PQQ nanolabels on the MB surface triggered the production of Fe(II)-ferrozine. The limit of detection was found to be 1 pg/mL with prostate specific antigen (PSA) as the model target. The result for the analysis of serum sample is in agreement with that achieved by the commercial enzyme-linked immunosorbent assay kits. The proposed immunosensor obviated the use of enzyme molecules for signal amplification and did not require expensive instruments for signal readout. This work should be valuable for the design of novel nanolabels and the proposed sensing strategy by the redox cycling could be applied to develop more sensitive biosensors.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 23
·7018-7026
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IF 6.177
Fei Wang,Fuying Zhu,Enxiang Ren,Qiang Zhang,Guo-Ping Lu,Yamei Lin
The development of efficient and green synthetic strategies for N-heterocycle synthesis has always been a research hotspot in organic synthesis. A facile one-pot iron-catalyzed synthesis of quinazolines from alcohols in water has been disclosed for the first time, in which a N-doped carbon encapsulated Fe–FeOx material (Fe–FeOx@NC) is applied as a catalyst, and various quinazolines (25 examples, 62–99%) are synthesized. The iron nanoparticles wrapped by nitrogen-doped carbon layers in Fe–FeOx@NC with strong anti-poisoning ability is the main reason for the high performance in the reaction. This protocol offers several advantages including the use of air as an oxidant, water as a solvent, and recyclable iron as a catalyst and high atom and step economy.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
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IF 4.1
Qi Junfeng,Liu Junhe,Hu Chanjuan,Wang Qingqing,Guo Yanhong,Zhang Mengdie,Hu Li,Lin Bin,Li Wansen
Excessive addition of ethyl maltol (EMA) to foods poses potential health risks, highlighting the need for reliable monitoring. Herein, an integrated Fe(III)-driven liquid-phase microextraction (LPME)–spectrophotometry system was developed for selective and high-throughput EMA determination. Fe(III) in the acceptor phase served dual roles: as a chemical trap achieving >90% extraction efficiency and as an in situ chromogenic probe enabling direct detection. This unique design combines membrane-mediated matrix exclusion with coordination-assisted extraction, resulting in enhanced sensitivity and improved resistance to matrix interference. Density functional theory calculations revealed that Fe(III) facilitated the forward extraction by reducing the transmembrane transfer free energy barrier while suppressing back-extraction via weakening EMA–membrane solvent interactions. Under the evaluated conditions, the system offered a broad linear range (7.8–1500 μM, R 2 > 0.999), low detection limit (0.67 μM), and satisfactory selectivity toward structural analogues. Validation in diverse food matrices yielded recoveries of 88–107% with good agreement with HPLC–UV ( R 2 > 0.99). The minimal solvent consumption, high throughput, and favorable greenness further highlight its practical utility. More than an EMA detection method, this work provides a proof-of-concept for the coordination-driven LPME strategy that intrinsically integrates sample preparation with in situ signal generation, offering new insights into the design of a mechanism-driven microextraction system. Graphical abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Kai Xuan,Taiguang Li,Yongmei Hao
The photo-Fenton system degrades pollutants, which can not only take the advantages of photocatalysis and Fenton reaction, but also avoid the drawbacks of each. However, removing pollutants without the addition of hydrogen peroxide (H 2 O 2 ) in photo-Fenton systems is still a challenge. Therefore, it is an outstanding strategy that inner-generate H 2 O 2 can provide more hydroxyl radicals to enhance the degradation of pollutants. This study reports a ZnIn 2 S 4 /Fe-POMs photo-Fenton system capable of degrading environmental pollutants due to the reaction between inner-generate H 2 O 2 (0.0248 mM in 15 min) and the stable circulation of Fe 3+ /Fe 2+ . As a result, the photodegradation efficiency of carbamazepine by ZnIn 2 S 4 /Fe-POMs can reach 93.92% within 60 min simulated solar irradiation even under neutral conditions. In addition, ZnIn 2 S 4 /Fe-POMs can remove Cr (VI) completely within 10 min under visible light irradiation. This work not only experimentally verifies the inner-generate H 2 O 2 can accelerate the Fe 3+ /Fe 2+ conversion, but also broadens the initial pH range (pH=3–9) for constructing efficient photo-Fenton systems.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Zexuan Liu,Mengting Chen,Yiqiao Lin,Weipeng Liu,Yiming Peng,Yingju Liu
In the electrolysis of water , the efficiency is heavily constrained by the slow kinetic process of the oxygen evolution reaction (OER) at the anode. Herein, by a simple hydrothermal method for the in-situ growth of Fe 3 (HHTP) 2 on the open three-dimensional nanostructured substrate, Co-anchored carbon nanotubes/carbon cloth (Co/CNT/CC), Fe 3 (HHTP) 2 @Co/CNT/CC was prepared and acted as an OER electrocatalyst . The combination of carbon nanotubes (CNTs) and carbon cloth not only enhanced the substrate conductivity, but also facilitated the uniform loading of Fe 3 (HHTP) 2 . The in-situ growth, on the other hand, allowed the Fe 3 (HHTP) 2 to connect with the conductive substrate tightly, thus enhancing the stability of the interfacial contact, improving the electron transfer efficiency and providing enough catalytically active sites. In addition, the construction of self-supported electrodes could effectively avoid the use of binders and improve the stability of the composites during electrolysis. The Fe 3 (HHTP) 2 @Co/CNT/CC displayed excellent properties in alkaline electrolytes as an efficient OER catalyst, achieving a current density of 50 mA cm −2 at an overpotential of only 1.60 V and perfect stability in long-term tests. Herein, the present work provides a rational tactics for developing self-supporting electrodes with plentiful active sites and high stability to enhance the electrochemical efficiency of water splitting.
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Journal of Energy Chemistry
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2023
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IF 13.1
Yuting He,Hongtao Li,Yi Wang,Yufei Jia,Yongning Liu,Qiang Tan
M−N−C (M = Fe, Co, Ni, etc.) catalyst owns high catalytic activity in the oxygen catalytic reaction which is the most likely to replace the Pt-based catalysts. But it is still a challenge to further increase the active site density. This article constructs the high-efficiency FeMn-N/S-C-1000 catalyst to realize ORR/OER bifunctional catalysis by hetero-atom, bimetal (Fe, Mn) doped simultaneously strategy. When evaluated it as bi-functional electro-catalysts, FeMn-N/S-C-1000 exhibits excellent catalytic activity ( E 1/2 = 0.924 V, E j =10 = 1.617 V) in alkaline media, outperforms conventional Pt/C, RuO 2 and most non-precious-metal catalysts reported recently. Such outstanding performance is owing to N, S co-coordinated with metal to form multi-types of single atom, dual atom active sites to carry out bi-catalysis. Importantly, nitrite poison test provides the proof that the active sites of FeMn-N/S-C are more than that of single-atom catalysts to promote catalytic reactions directly. To better understand the local structure of Fe and Mn active sites, XAS and DFT were employed to reveal that FeMn-N 5 /S-C site plays the key role during catalysis. Notably, the FeMn-N/S-C-1000 based low-temperature rechargeable flexible Zn-air also exhibits superior discharge performance and extraordinary durability at −40 °C. This work will provide a new idea to design diatomic catalysts applied in low-temperature rechargeable batteries.
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Journal of Water Process Engineering
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2023
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IF 7
Xiuping Chen,Ting Zhang,Guangfei Qu,Yuanchuan Ren,Zuoliang Wang,Jun Wang,Ping Lu,Minhua Cheng,Xiaomei Chu
The degradation of cyanide ions in cyanide containing wastewater is a major challenge in water treatment . This article uses a one-step hydrothermal method to prepare iron copper bimetallic oxide catalysts and applies them for the rapid degradation of cyanide (CN − ). The experimental results show that under the optimal conditions, the removal rate of CN − in the bimetallic catalyst/H 2 O 2 system is close to 100 % within 1 h, which is significantly better than the single metal oxide catalyst. Through characterization by SEM-EDS, XRD, XPS, and combined with catalytic performance experimental analysis, it was found that. There is a synergistic effect between Cu and Fe, which can effectively promote the cycling of metal ions and improve the generation efficiency of hydroxyl radicals (HO • ) to a certain extent, thereby improving the degradation performance of CN − . In addition, ion chromatography was used to analyze the oxidation products and a possible pathway for CN − degradation was proposed. This provides new insights and ideas for the development of high-performance bimetallic oxide catalysts for cyanide degradation.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 43
·23270-23277
·
IF 11.9
Xiaoyun Zhang,Shifan Zhu,Yixue Xu,Yuqiao Wang
The tip effect of the high curvature tip top can cause electromagnetic effects to improve the catalytic performance. Doping of transition metals (Cr, Fe and Mo) into CoP array nanocones alters the tip curvature of CoP to strengthen the tip effect with increasing curvature. The stronger tip effect of Fe-CoP improves OH− concentration, accelerates surface charge transfer and enhances the electric field for a higher catalytic efficiency. Fast charge transfer and high electronic conductivity are attributed to transition metal doping, which can be confirmed by theoretical simulations and experiments. The optimized d-band centre of Fe-CoP adjusts the appropriate adsorption strength of the reaction intermediates. Fe doping endows CoP with a higher curvature cone structure and optimizes electronic structure for high catalytic activity and reaction kinetics. Tip cone as special sites tuned by transition metal doping provides a strategy for efficient non-noble metal catalysis.
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Advanced Healthcare Materials
·
2023
·
IF 10
Xiaohu Zhou,Tiantian Chen,Tengda Ma,Lizhao Yan,Haojie Wei,Shuang Liu,Zhiyin Dai,Zhizhong Xie,Jun Deng,Shengxiang Tao,Lihong Fan,Yingying Chu
Bacterial infection is a critical factor in wound healing. Due to the abuse of antibiotics, some pathogenic bacteria have developed resistance. Thus, there is an urgent need to develop a non-antibiotic-dependent multifunctional wound dressing for the treatment of bacteria-infected wounds. In this work, a multifunctional AOCuT hydrogel embedded with CuS@TA-Fe nanoparticles (NPs) through Schiff base reaction between gelatin quaternary ammonium salt – gallic acid (O-Gel-Ga) and sodium dialdehyde alginate (ADA) along with electrostatic interactions with CuS@TA-Fe NPs is prepared. These composite hydrogels possess favorable injectability, rapid shape adaptation, electrical conductivity, photothermal antimicrobial activity, and biocompatibility. Additionally, the doped NPs not only impart fast self-healing properties and excellent adhesion performance to the hydrogels, but also provide excellent peroxide-like properties, enabling them to scavenge free radicals and exhibit anti-inflammatory and antioxidant capabilities via photothermal (PTT) and photodynamic (PDT) effects. In an S. aureus infected wound model, the composite hydrogel effectively reduces the expression level of wound inflammatory factors and accelerates collagen deposition, epithelial tissue, and vascular regeneration, thereby promoting wound healing. This safe and synergistic therapeutic system holds great promise for clinical applications in the treatment of infectious wounds.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yang Zhang,Zhenglei Li,Dongqing Yan,Hongxia Chen,Meng Zhang,Jun Wang,Guang Yang
In this work, Fe(II)/Peroxymonosulfate (PMS) treatment with dual functionality of pre-oxidation and coagulation was applied to enhance the removal of alkali lignin in water. The removal efficiency of alkali lignin (2 g/L) could reach ∼ 99% at an optimal dosage of [Fe(II)] = 2.4 mM and [PMS] = 7.8 mM, which was efficiently superior than that using ferric and polymeric coagulant individually. Pre-oxidation, involving hydroxyl radical (•OH) and sulfate radical (SO 4 •− ), has been demonstrated to play a crucial role in both oxidative degradation (∼30%) and reducing the molecular weight and hydrophilicity of lignin. Meanwhile, the formation of polynuclear Fe-hydroxide complexes was also fostered, which in turn greatly contribute to the removal of lignin through an enhanced coagulation mechanism. The reductive units present in alkali lignin was demonstrated to initiate a dynamic transition between Fe(III) and Fe(II) by donating electrons. This redox activity is anticipated to continuously promote the formation of electro-neutral and loose flocs, thereby resulting in an enhanced coagulation performance. Furthermore, ultrafiltration (UF) was also demonstrated as a viable liquid/solid separation method following Fe(II)/PMS treatment, effectively promoting membrane flux recovery rate to ∼90%. This highlights the remarkable potential of this method when combined with other treatment processes. This study aims to offer a complementary strategy for remediating alkali lignin wastewater while advancing the fundamental understanding of redox-reaction enhanced in-situ coagulation in water treatment applications.
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