ENVIRONMENTAL RESEARCH
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2023
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IF 8.3
Chuanhui Geng,Qingguo Chen,Zhenzhen Li,Mei Liu,Zhi Chen,Hengcong Tao,Qiao Yang,Baikang Zhu,Lijuan Feng
In this study, we investigated the doping of Fe–N–C with ZnO (Fe–N–C@ZnO) to enhance its performance in the reduction of biological toxicity and degradation of enrofloxacin (ENR) in seawater. The steady-state/transient fluorescence analysis and free radical quenching test indicated an extremely low electron–hole recombination rate and the generation of reactive oxygen species in Fe–N–C@ZnO, leading to an improvement in the energy efficiency. We compared the ENR degradation efficiencies of Fe–N–C@ZnO and ZnO using both freshwater and seawater. In freshwater, Fe–N–C@ZnO exhibited a slightly higher degradation efficiency (95.00%) than ZnO (90.30%). However, the performance of Fe–N–C@ZnO was significantly improved in seawater compared to that of ZnO. The ENR degradation efficiency of Fe–N–C@ZnO (58.87%) in seawater was 68.39% higher than that of ZnO (34.96%). Furthermore, the reaction rate constant for ENR degradation by Fe–N–C@ZnO in seawater (7.31 × 10 −3 min −1 ) was more than twice that of ZnO (3.58 × 10 −3 min −1 ). Response surface analysis showed that the optimal reaction conditions were a pH of 7.42, a photocatalyst amount of 1.26 g L −1 , and an initial ENR concentration of 6.56 mg L −1 . Fe–N–C@ZnO prepared at a hydrothermal temperature of 128 °C and heating temperature of 300 °C exhibited the optimal performance for the photocatalytic degradation of ENR. Based on liquid chromatography–mass spectrometry analysis, the degradation processes of ENR were proposed as three pathways: two piperazine routes and one quinolone route.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 31
·10662-10671
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IF 4
Dan Wen,Yan Ma,Guomei Mu,Qiuping Huang,Xuefeng Luo,Dunmin Lin,Chenggang Xu,Fengyu Xie,Guangzhao Wang,Wenhan Guo
Improving the efficiency of the anodic oxygen evolution reaction (OER) is important to solve the global energy crisis and greenhouse gas emission problems. In this paper, a preparation method for a MIL-53(Fe)@ZIF-67(Co) composite electrode is proposed. The hierarchical structure formed by the combination of MIL-53(Fe) and ZIF-67(Co) provides a rich channel for the transport of electrons and mass in the OER process. XPS analysis and DFT calculations revealed that Fe electrons in MIL-53(Fe) were transferred to Co in ZIF-67(Co) through O, which confirmed the rapid charge transfer effect of this transport channel. The MIL-53(Fe)@ZIF-67(Co) electrode has significant OER performance. When the current density reaches 10 mA cm−2, the overpotential is only 193 mV. This study inaugurates a new way for the rational design of a multiphase interface and the construction of new MOF channel structures.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Wanqing Zhang,Haixian Liu,Yuxuan Xiao,Jie Ying,Hongwei Liu
Oxygen evolution reaction (OER) has gained increasing attention among researchers due to its significance in energy conversion. However, the sluggish kinetics of the OER present notable challenges. In this work, we present an energy-efficient, cost-effective, widely applicable, and scaled-up biological preparation method to prepare OER catalytic materials with high activity and stability based on bacteria and inexpensive Ni-Fe foam under mild conditions. Anaerobic sulfate-reducing bacterium Desulfovibrio caledoniensis and aerobic Pseudomonas stutzeri are the typical microorganisms and the OER performance of their products is not clear. Electrochemical measurements show that the catalyst prepared via D. caledoniensis exhibits a low overpotential of only 247 mV to achieve 10 mA cm −2 and a low Tafel slope of 46 mV dec -1 , while the catalyst prepared via P. stutzeri has an overpotential and Tafel slope of 259 mV and 71 mV dec -1 , respectively. Therefore, these catalysts exhibit excellent catalytic activities. Furthermore, they have a good stability of more than 40 h at 10 mA cm −2 which is far superior to that of the majority of reported NiFe-based OER catalysts. This work shows new insights into the preparation and development of high-performance OER catalysts in mild conditions.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Xiangyu Wang,Min Jiang,Iseult Lynch,Zhiling Guo,Peng Zhang,Lisi Wu,Jun Ma
Although Fe/Fe 2 O 3 has potential application compared with nanoscale zero-valent iron (nZVI), its smooth structure largely limits the catalytic performance. To address this challenge, we innovatively constructed highly efficient composite Fe/Fe 2 O 3 @UiO-66 via employing an urchin-like core-shell structure of Fe/Fe 2 O 3 onto UiO-66 through a facile ion exchange precipitation method without inert gas protection. The characterization results show the urchin-like core-shell configuration can extend the life span of Fe 0 and produce more active sites. Besides, the absorption spectrum is broadened by Fe 2 O 3 which has narrow band gap and the high-efficiency separation of photogenerated electron-hole pairs is obtained with the load of Fe/Fe 2 O 3 . Moreover, Two-parameter pseudo-first-order decay model fits well with the reduction and adsorption of composites in the dark reaction, and a plausible pathway for tetracycline (TC) degradation is also proposed. The findings of this research provide a promising method for promoting the catalytic properties of MOF-based materials and Fe/Fe 2 O 3 .
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Zhimin He,Zhengjie Tan,Yu Pu,Qiyu Li,Wei Hong,Rong Li,Xinglong Gou
Ti 3 C 2 T x nanosheets arrays sandwiched with FeNi 2 S 4 nanoparticles are in-situ grown on Ni-Fe foam (FeNi 2 S 4 -Ti 3 C 2 T x @NFF) via a facile one-pot hydrothermal route. The as-prepared FeNi 2 S 4 -Ti 3 C 2 T x @NFF exhibits simultaneously excellent catalytic activity towards oxygen and hydrogen evolution reactions with low overpotentials (136 and 97 mV at 10 mA cm -2 , respectively) and superior stability. Moreover, a symmetrical electrolyzer utilizing FeNi 2 S 4 -Ti 3 C 2 T x @NFF as the anode and cathode only requires 1.51 V for overall water splitting to reach 10 mA cm -2 , and can continuously operate at 20 mA cm -2 for 100 h. The outstanding catalytic performance of the catalyst can be attributed to increased active sites in the well-dispersed FeNi 2 S 4 nanoparticles, enhanced electronic conductivity due to introduction of Ti 3 C 2 T x nanosheets, strong electronic coupling between Ti 3 C 2 T x and FeNi 2 S 4 , improved mass transfer through the hierarchically porous structures and robust self-supporting configuration.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Hong Yu,Chen Wang,Xinhe Xiong,Bitao Dai,Yang Wang,Zhijie Feng,Hao luo,Jiangxiong Zhu,Guoqing Shen,Yun Deng,Xueqing Geng,Danfeng Wang,Lumei Wang
Acetamiprid (Ace), extensively employed in agricultural production as a substitute for organophosphorus pesticides, poses a potential threat to the environment and human health due to excessive residues. Hence, the development of reliable and convenient techniques to determine Ace levels in the environment holds significant importance. Among various assay methods, nanomaterial-based aptamer-based biosensors (aptasensors) have emerged as efficient and promising tools. In this study, we successfully developed a novel aptasensor for monitoring Ace in the environmental water, utilizing advanced nanomaterials known as Fe-N-C single-atom nanozymes (SAzymes). Fe-N-C SAzymes exhibited excellent catalytic activity, high stability, and complete atom utilization. A facile dual-confinement route was employed for the synthesis of Fe-N-C SAzymes, and their performance as oxidase-like nanozymes was investigated. The synthesized Fe-N-C SAzymes presented distinct oxidase-like activity and demonstrated the capability to interact with a chromogenic indicator-TMB, serving as the signal transduction element in our assay. Furthermore, we found that thiol-modified aptamers could effectively dampen the oxidase-like activity of Fe-N-C SAzymes.Therefore, we successfully developed a Fe-N-C SAzymes assisted detection method for Ace, which exhibited high sensitivity (LOD = 16.9 nM) and selectivity. Overall, this work provides new insights into the design of multifunctional Fe-N-C SAzymes for environmental and biological applications.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xianxian Sheng,Yulong Liu,Mudassir Habib,Shuguang Lyu
In the advanced oxidation process for the remediation of organic contaminated water and soil, sodium percarbonate (SPC) is regarded as a potential oxidant. Iron sulfide (FeS) was chosen as an activator in this work for assisting fluoranthene (FLT) removal, with Fe(III) addition overcoming the solution pH constraint on FLT removal in the SPC/FeS process. At the optimal chemical dosages, SPC/FeS (pH = 3.0) and SPC/FeS/Fe(III) (pH = 5.7) processes removed approximately 100% and 92.8% of FLT, respectively. Based on the results of scavenging trials and electron paramagnetic resonance analysis, HO• was the dominant reactive oxygen species in FLT removal by SPC/FeS and SPC/FeS/Fe(III) processes. Dissolved oxygen (DO) played a crucial role in FLT removal, and SPC/FeS/Fe(III) process was more dependent on DO than SPC/FeS process. Both processes overcame the limitation of Cl – on the application of SPC-induced oxidation process. In actual groundwater experiments, 95.5% of FLT was removed in SPC/FeS/Fe(III) process at an initial solution pH of 5.0. In soil slurry trials, 12 h was the optimal reaction time for FLT removal, and the SPC/FeS and SPC/FeS/Fe(III) processes degraded 85.6% and 86.7% of FLT, respectively. In conclusion, the FeS-activated SPC-induced oxidation process offers perspectives for PAHs contaminated field decontamination and contributes to the optimization of modern oxidation methods.
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Nanoscale
·
2023
·
IF 6.7
miaomiao yuan,Rongjun Zhang,Shuxiang Xu,Lihao Guo,Luoyijun Xie,Yingying Liao,Yang Xu,Xuemei Fu
Photothermal therapy (PTT) is an emerging field, and the photothermal agents could convert visible or near-infrared (NIR) radiation into heat to kill tumor cells. However, the low photothermal conversion efficiency of photothermal agents and their limited antitumor activities delay the development of these agents into monotherapies for cancer. Herein, we have fabricated an ultrasmall polyvinylpyrrolidone (PVP)-Fe-Cu-Ni-S (PVP-NP) nano-agent via a simple hot injection method with an excellent photothermal conversion efficiency (~96%). Photothermal therapy with this nano-agent effectively inhibits tumor growth without apparent toxic side effects. Mechanistically, our results demonstrated that, after NIR irradiation, PVP-NPs can induce ROS/singlet oxygen generation, decrease mitochondrial membrane potential, and release extracellular Fe2+ and consume glutathione, triggering autophagy and ferroptosis of cancer cells. Moreover, PVP-NPs exhibit excellent contrast enhancement according to magnetic resonance imaging (MRI) analysis. In summary, PVP-NPs have a high photothermal conversion efficiency and can be applied for MRI-guided synergistic photothermal/photodynamic/chemo-dynamic cancer therapy, solving the bottleneck of existing phototherapeutic agents.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Wenliang Wang,Jiale Huang,Yishuai Fu,Weikun Jiang,Yutong Chen,Yujun Ma,Sizhe Han
Improving the yield of target monophenols plays an important role in increasing the economic competitiveness of lignin valorization. In this study, a 3D porous Fe-MoS 2 /CMF catalyst with nanoflower microstructure was successfully fabricated by a simple one-step hydrothermal method. The catalytic depolymerization of the lignin β-O-4 model showed that Fe-doping increased the efficiency of the catalytic conversion reaction and promoted the cleavage of the β-O-4 ether bond, in agreement with theoretical calculations. Reforming of lignin depolymerization vapor revealed that the Fe-MoS 2 /CMF catalysts significantly improved the selectivity of phenol (30.01 wt%) and styrene (16.34 wt%) with the decrease of oligomers . Moreover, finite element simulation showed that the Fe-MoS 2 /CMF catalysts can also enhancing the local thermal effect by creating hot spots on the surface, thereby facilitate the lignin vapor reforming. Consequently, this work provides a promising method for the efficient production of phenol and styrene from lignin using bimetallic nanoarray microwave responsive catalyst.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shiyu Zhang,Qiuyu Qiao,Yangfeng Wen,Kena Ren,Xiaoyu Ma,Haisheng Tao
A novel composite of acetic acid-modulated AC-NH 2 -MIL-101(Fe) was prepared by mild chemistry . The catalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), Brunaure-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). Acetic acid can control the crystal size, so that the catalyst had a large specific surface area (99.35 m 2 ·g −1 ) and pore size (0.13 cm 3 ·g −1 ), the adsorption amount of Rhodamine B (RhB) up to 446.965 mg·g −1 , after the addition of peroxydisulfate (PDS), the catalytic degradation efficiency of RhB was as high as 99.7%. Electronic paramagnetic resonance spectrometer (EPR) and quenching experiments showed that the catalytic process may involve radical (·OH, SO 4 -· and O 2 ·- ) and non-radical ( 1 O 2 ) processes, in which the contribution of 1 O 2 to degradation reached 63.55% and played a major role.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lu Tian,Dazhong Zhong,Tao Zhao,Yi Liu,Lu Hao,Qiang Fang,Xuelei Lang,Xin Zhao,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
Developing highly efficient OER catalysts is essential for producing hydrogen from water electrolysis to compensate for conventional fossil fuel shortages. Here, the oxygen-vacancy-rich heterostructure grown on the Ni foam (NF) (Co 3 O 4 @Fe-B-O/NF) is fabricated. The synergistic effect between Co 3 O 4 and Fe-B-O has been proven effectively modulate the electronic structure and produce highly active interface sites, ultimately leading to enhanced electrocatalytic activity. Co 3 O 4 @Fe-B-O/NF requires an overpotential of 237 mV to drive 20 mA cm −2 in 1 M KOH, and 384 mV to drive 10 mA cm −2 in 0.1 M PBS, superior to most catalysts currently used. Moreover, Co 3 O 4 @Fe-B-O/NF as an oxygen evolution reaction (OER) electrode shows great potential in overall water splitting and CO 2 reduction reaction (CO 2 RR). This work may provide effective ideas for designing efficient oxide catalysts.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jian Xu,Atian Xie,Haotian Sun,Yuting Wu,Chengcai Li,Changguo Xue,Jiuyun Cui,Jianming Pan
Here, a polyvinylidene difluoride composite membrane (PVDF@TA–Fe membrane) was prepared via the repeated spraying of tannic acid (TA) and Fe 3+ to form a TA–Fe complex on the hydrophobic PVDF membrane, which endows the membrane surface superhydrophilicity. The effects of the number of sprays on the surface wettability and emulsion separation capacity of membrane were systematically investigated. It was found that the TA-Fe(III)-complex network formed on the membrane significantly increased the hydrophilicity of the membrane, and the PVDF@TA–Fe membrane was found to exhibit superhydrophilicity/underwater superoleophobicity. The PVDF@TA–Fe membrane was found to exhibit good separation efficiencies (above 99%) and high fluxes (1189.1–2310.0 L m −2 h −1 bar −1 ) when used to separate oil and water in various oil/water emulsions. The repeated separation experiments show that the membrane has a good antifouling performance and maintains a good oil/water separation performance after more than 10 cycles. The present work is of great importance to the large-scale preparation of superhydrophilic membranes and treatment of oily wastewater.
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