JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Yougan Xiao,Jiahui Lu,Shunjian Cheng,Zilong Wang,Antong Shi,Jyunhong Shen,Zhuwu Jiang
From a preliminary performance comparison of several layered double hydroxides (LDHs), magnetically separable Ni-M LDHs (M = Fe, Al) were synthesized and applied as efficient ozonation catalysts for degrading dye Rhodamine B (RhB). As proved by various characterizations, the micromorphology, nanostructure size, and porous feature of the synthesized Ni-M LDHs significantly varied with different metal components. Among them, Ni 3 -Fe LDH and Ni 2 -Al LDH possessed a relatively larger specific surface area to react with O 3 interfacially, thereby exhibiting excellent catalytic ozonation performance. The RhB was almost completely degraded within 60 min, and the removal efficiencies of COD and TOC reached above 70% and 50%, respectively. The effects of catalyst dosage, initial dye concentration, solution pH, and coexisting inorganic anions on RhB degradation were studied systematically. ESR measurements and radical quenching experiments indicated that OH , O 2 − , and 1 O 2 are primary reactive oxygen species (ROS), while 1 O 2 induced the most dominant degradation contribution. According to the variations of ROS formation and material properties during the catalytic ozonation process, the possible reaction mechanisms were proposed. Moreover, the differences involved in the redox of multivalent metals and the transformation of surface hydroxyls over Ni-Fe and Ni-Al LDHs were further revealed.
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CHEMICAL ENGINEERING SCIENCE
·
2023
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IF 4.7
Youning Wang,Shencheng Pan,Zhenjie Lu,Zixin Jia,Jingwen Sun,Aleksandr L. Vasiliev,Pawel J. Kulesza,Xin Wang,Junwu Zhu,Yongsheng Fu
Rechargeable zinc-air batteries (ZABs) hold enormous promise as energy conversion and storage system of the next generation. Here, through utilizing the Co/ZIF-8@F127 precursor and a coordinated strategy that includes ‘post-absorption’ and ‘dual-pyrolysis’, a Fe/CoN x -C possesses a hierarchical porous N-doped carbon with an ultrahigh specific area and rich defects to stabilize accessible dual metallic active sites. With a narrow potential gap of 0.71 V, the Fe/CoN x -C catalyst demonstrates excellent bifunctional electrocatalytic activity toward the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Noteworthily, scanning electrochemical microscopy (SECM) was used to visualize the local electrocatalytic ORR activity of CoN x -C and Fe/CoN x -C. For the applications of zinc-air batteries, the Fe/CoN x -C-based cathode provides a high peak power density of 134.97 mW cm −2 for aqueous ZABs. Moreover, quasi-solid-state ZABs (including flexible ZAB and cell ZAB)-based on Fe/CoN x -C as cathode catalyst demonstrate satisfying flexibility and durability. The theoretical calculation results further elucidate the synergistic effect that the engagement of Fe atoms in the electron transfer process of the FeN 4 @CoN 4 system reduces the energy barrier of the rate-determining-step in ORR and OER, hence facilitating the reversible oxygen electrocatalytic kinetics.
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Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Wen Gao,Fangyuan Wang,Meilin Ou,Qianqian Wu,Lei Wang,Haonan Zhu,Yuanyuan Li,Ning Kong,Jianping Qiu,Shanshan Hu,Shuang Song
The presence of elevated levels of norfloxacin (NOR) in the aquatic environment presents a serious risk to both human health and environmental organisms due to its extremely toxic and persistent characteristics. Herein, a series of Fe/Ti bimetallic composites (NH 2 -MIL-53(Fe/Ti)) were prepared using a one-step hydrothermal method to assess their capability for NOR degradation and investigate degradation mechanisms. It was observed that the well-organized nanosheets interconnected to form chrysanthemum clusters contained a significant number of exposed edges and open pores, which facilitated the enrichment of NOR. Notably, the optimum NH 2 -MIL-53(Fe/Ti) (1.5:1) demonstrated excellent degradation performance for NOR under visible light, owing to an electronic interaction between Fe 3+ and Ti 4+ metal centers. Efficient NOR degradation by NH 2 -MIL-53(Fe/Ti) (1.5:1) was achieved at 84.6% after 120 min of irradiation. Furthermore, the NH 2 -MIL-53(Fe/Ti) (1.5:1) maintained excellent reusability and stability even after five cycles tests. Active species trapping experiments confirmed that the pivotal role of •O 2 − and h + in photodegradation of NOR pollutants. A plausible photocatalytic mechanism was suggested according to various performance characterization and experimental results. Defluorination and ring opening were the main degradation pathways. This work advanced our understanding of photogenerated carriers transfer and energy conversion in bimetallic MOFs . Additionally, a novel strategy was presented for visible light catalytic degradation of NOR, which were highly relevant for the field of environmental treatment.
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NANOTECHNOLOGY
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2023
·Vol. 34
·期 49
·495102
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IF 3.5
Shouhui Chen,Dan Zhou,Jingguo Yu,Zhenzhong Huang,Li Wang
It is of great significance for electrochemical sensors to simultaneously detect dopamine (DA) and uric acid (UA) related to biological metabolism. In this work, two-dimensional (2D) porous carbon nanosheets (CNS) was prepared as electrocatalysts to improve the sensitivity, the selectivity, and the detection limit of the simultaneous detection. First, 2D amorphous iron-metal organic frameworks (Fe-MOF) was synthesized with Fe3+ and terephthalic acid via a facile wet chemistry method at room temperature. And then, CNS was prepared by pyrolysis and pickling of Fe-MOF. CNS had large specific surface area, good electrical conductivity and lots of carbon defects. The response currents of the CNS modified electrode was larger than those of the control electrodes in the simultaneous determination. The simultaneous determination was measured via differential pulse voltammetry to reduce the effect of capacitive currents on quantitative analysis. The CNS modified electrodes showed high sensitivity and low detection limit for the simultaneous detection of DA and UA. The modified electrodes have been successfully used to detect DA and UA in normal human serum.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Yijing Ai,Fan Shi,Xiao Han,Xiaoqing Li,Wanting Fu,Baoli Wang,Xiaoping Zhang,Wei Sun
In this work, a simple one-step pyrolysis process was designed to synthesize Fe-doped graphite carbon nitride (Fe–C 3 N 4 ) nanosheets with FeCl 3 as Fe source. The resulted samples were characterized by various characterization techniques, and the results showed that Fe species might form Fe–N bonds with N atoms of C 3 N 4 , which was similar to the iron (Ⅲ) porphyrin active center of horseradish peroxidase. Then Fe–C 3 N 4 nanosheet was further mixed with carbon nanotube (CNT) to obtain Fe–C 3 N 4 @CNT nanocomposite, which was further modified on the self-made flexible printed electrode (PE) to construct the flexible working electrode. Fe–C 3 N 4 nanosheets show good catalytic activity for H 2 O 2 and the introduction of CNT can effectively improve the electron transfer efficiency at the modified electrode interface. By combining with wireless portable electrochemical workstation, the sensor shows a wider detection range (10.0 μmol/L–20.0 mmol/L) and a lower limit of detection (0.38 μmol/L, S/N = 3) for the H 2 O 2 analysis. Furthermore, the sensor can be applied to the real time and in-situ analysis of H 2 O 2 secreted from live cells. In word, this self-supported sensing electrode shows great potential applications in monitoring the pathological and physiological dynamics of cancer cells.
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MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Rui Lu,Lingxi Qiu,Yiwen Xie,Jiaying Luo,An Chen,Yang Xu,Tian Shang,Dongmei Jiang,Qingfeng Zhan
In this work, a novel Fe-doped AgBr microsphere photocatalyst was synthesized. The analysis of XRD, XPS, ICP and SEM distinctly demonstrated that the Fe ions were successfully doped into AgBr lattice. Under simulated solar light, the photocatalytic performance of organic contaminants rhodamine B (RhB) and ciprofloxacin (CIP) was considerably improved by Fe-doped AgBr. Notably, FA-3 (the molar ratio of Fe/Ag was 0.18 %), as the optimal photocatalyst, degraded nearly 100 % of RhB within 40 min, while AgBr only degraded 35 % of RhB. Moreover, the sample performed significantly enhanced mineralization ability, excellent degradation performance under different initial PH conditions, and stable photocatalytic ability after three cycles. Doping Fe ions modified the band structure of AgBr, introduced impurity levels to provide new electron transfer channels, and promoted the charge separation and transfer in AgBr semiconductors. This work provides an idea for the efficient degradation of organic pollutants by doping metal cations modified semiconductor photocatalysts.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Xin Wen,Cui Li,Hui Liu,Guohua Fan,Yanan Tang,Chuncheng Hao,Lili Ma,Pingan Song
Recently great efforts have been focused on designing high-performance microwave absorbers using sustainable biomass resources, but there remains a lack of green and efficient fabrication methods. Herein, inspired by natural porous character of biomass waste, we demonstrated a green one-step route to convert waste coffee grounds into porous C/Fe hybrids, and further explored their potential applications for broadband and high-efficiency microwave absorption. In this design, the WCG-20–750 (incorporated 20 wt% Fe(C₅H₇O₂)₃ catalyst and carbonized at 750 °C) exhibited porous microstructure with the highest char yield of 55.45 wt%. Furthermore, the as-prepared C/Fe hybrids from WCG-20–750 displayed excellent microwave absorption performances. Typically, the minimum reflection loss (RL min ) reached to -52.86 dB and the widest effective absorption bandwidth (EAB) was 6.40 GHz at the thickness of 3.0 mm. This work provides an economically viable and environmentally friendly strategy to convert biomass wastes into value-added microwave absorbers, ultimately making contributions to the upcycling of renewable biomass resources and the fostering of sustainable environment.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 39
·91262-91275
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IF 5.8
Cheng Tangying,Li Jinjin,Ma Xiuwei,Yang Linjun,Zhou Lei,Wu Hao
Various materials have been developed to capture volatile organic compounds (VOCs) to mitigate air pollution. However, sorbent materials with excellent resistance to water are rare. Here, several Fe/N-doped activated carbons (ACs) have been prepared to capture VOCs in humid environments. The ACs were analyzed by various characterization techniques, such as BET, SEM, XPS, XRD, FTIR, and Raman. The results showed that Fe/N doping resulted in the specific surface area of the ACs increasing by 500 to 1000 m 2 g −1 , the average pore size increasing to approximately 2 nm, improved mesoporous structure, higher graphitization, lower hydrophilicity, and polarity. The VOCs adsorption performance of the ACs was evaluated by static and dynamic adsorption experiments. The uptake of toluene and ethyl acetate by ACs was enhanced to 224 mg g −1 and 135 mg g −1 , respectively. And ACs were able to maintain 70 to 80% VOCs adsorption capacity for VOCs at 80% relative humidity. Furthermore, the microscopic mechanisms were investigated by the grand canonical Monte Carlo method (GCMC). The highly graphitized structure and the N functional groups favored the VOC adsorption process and discouraged the adsorption of water vapor. This work affirmed the dominance of Fe/N-doped carbon, which will contribute to the evolution of water-resistant VOCs adsorbent materials. Graphical Abstract
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ACS Applied Nano Materials
·
2023
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IF 5.9
Yingli Luo,Xiaoming Yu,Yizhu Yao,Lin Zhu,Wenxiang Qin,Zhuohan Shan,Lanlan Song,Jilong Wang,Liangxing Wang,Hanhan Yan,Mayun Chen
Synergistic therapeutic nanomedicine with great biosafety was regarded as a promising strategy for cancer therapy in clinic. Due to the drug resistance and insufficient performance of chemotherapy, the response rate in non-small cell lung cancer is limited. As another effective strategy against tumor, ferroptosis may enhance the sensitivity of chemotherapy. Herein, we reported a biomimetic iron metal–organic framework (Fe-MOF) nanomedicine responding to the intracellular environment of non-small cell lung cancer therapy to accelerate tumor cell death by inducing the ferroptosis and apoptosis of tumor cells. We demonstrated that the doxorubicin (DOX)-loaded biomimetic Fe-MOF (mFe-MOFDOX) could dramatically promote degradation for Fe2+ generation and release of DOX in the intracellular acidic microenvironment. The mFe-MOFDOX nanoparticles enhanced the generation of reactive oxygen species (ROS) to induce comparable glutathione peroxidase 4 (GPX4)-mediated ferroptosis and assisted DOX-mediated apoptosis. Eventually, the combination of biomimetic nanoparticle-induced ferroptosis and chemotherapy-induced apoptosis inhibited tumor growth and lung metastasis, suggesting the promising potential of ferroptosis induction for promoting non-small cell lung cancer chemotherapy.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jieru Guo,Ge Song,Minghua Zhou
Iron-based catalysts usually have a narrow pH application range and are easy to agglomerate and inactivate in the heterogeneous electro-Fenton (Hetero-EF) process. In this work, FeN-carbon nanotubes (FeN-CNTs) catalysts with highly dispersed FeNx sites and tubular structures were synthesized. This FeN-CNTs/Hetero-EF process extended the pH application range to 3–11 with low metal leaching (0.4 mg/L at pH 3) and negligible homogeneous contribution. Compared with nitrogen-doped carbon (N-C, prepared with the same procedure but without FeCl 3 ⋅6H 2 O precursor), its pseudo-first order reaction rate constant was increased by 4.4 times, suggesting that the uniformly dispersed active site FeNx played a key role in the catalytic activation of H 2 O 2 and the efficient degradation of carbamazepine (CBZ). Effective CBZ removal (10 mg/L) could be achieved at low current density (1.25 mA/cm 2 ) and catalyst dosage (50 mg/L) in FeN-CNTs/Hetero-EF. The capture experiments and EPR tests confirmed the existence of various active species such as • OH and 1 O 2 , among which • OH played a dominant role in the degradation of CBZ. FeN-CNTs significantly improves the removal of pollutants under a wide pH range, showing broad application prospects.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xinru Xu,Chenyang Shu,Rong Jin,Hongdian Chen,Chuanlan Xu,Yao Liu,Lingtao Sun,Chaozhong Guo,Haifeng Chen,Wenli Liao
Low-density active sites, low-mass transfer rate, and poor stability of carbon-based catalytic materials from the pyrolysis of conventional metal-nitrogen complexes can hamper the oxygen reduction reaction (ORR). Herein, a composite structure of nitrogen-doped carbon nanosheets grafted with carbon nanotubes are synthesized by Zn-ZIF-L breaking and co-functionalized by coupling Fe 2 O 3 nanoparticles with active Fe-N x species to form an active ORR catalyst (D-FeNC/MOF). Under the synergetic effect of high-density active sites and multi-size pore distribution, the diffusion resistance of oxygen in the pores can be decreased to facilitate the transfer of reactants and products, and the improvement of ORR efficiency. Comparing to the commercial Pt/C catalyst, the d -FeNC/MOF has exhibited a more positive half-wave potential of 0.875 V ( vs . RHE) and a higher catalytic stability. Besides, the zinc-air battery assembled with d -FeNC/MOF as a cathode catalyst can also offer a maximum power density of 170 mW cm −2 and a specific energy density of 842 Wh kg −1 . This work can provide a new way for designing non-Pt catalysts for various electrochemical energy devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qianzhen Fang,Ni Liu,Yanling Gu,Hailan Yang,Shujing Ye,Zhongzhu Yang,Gaobin Chen,Xiaofei Tan,Xinjiang Hu
Metal-based materials are widely regarded as promising catalysts for activating peroxymonosulfate (PMS) to remove refractory organic contaminants with high efficiency. In our study, Ni-Fe layered double hydroxide (LDH)-biochar (BC) composite-induced PMS-based advanced oxidation process (AOP) was utilized to elucidate the degradation of tetracycline hydrochloride (TCH). In Ni-Fe LDH-BC/PMS system, more than 99% TCH (45 μM) could be removed effectively at low doses of oxidant (PMS, 0.10 mM) and catalyst (Ni-Fe LDH-BC, 0.10 g/L) addition within 80 min. Besides, the Ni-Fe LDH-BC/PMS system showed high resistance to some inorganic anions, and the Ni-Fe LDH-BC composite possessed excellent reusability in the degradation of TCH (>99% in four cyclic experiments). The reaction mechanisms were investigated via electron paramagnetic resonance detection, chemical quenching tests, probe experiments, and electrochemical measurements. These results indicated that the electron-shuttle mechanism played the dominant role in the removal of TCH. It is worth noting that determination of PMS concentration can reflect the reliability of quenching experiments. In the Ni-Fe LDH-BC composite, BC could not only improve the dispersion of Ni-Fe LDH, but also increase the conductivity of Ni-Fe LDH. Overall, a successful modification strategy was proposed in our study to improve the catalytic property of Ni-Fe LDH, and reaction mechanisms of TCH degradation were discussed deeply and comprehensively.
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