WATER ENVIRONMENT RESEARCH
·
2017
·Vol. 89
·期 7
·614-621
·
IF 0.91
Xinxin Yue,Weilin Guo,Xianghui Li,Xiaomei Gao,Guangyou Zhang
In this study, a novel composite containing an iron based metal-organic framework (MOF) and BiOBr was successfully synthesized by a simple method, and was fully characterized by X-ray diffraction patterns, Fourier transform infrared spectra, UV-vis diffuse reflectance spectra, and transmission electron microscopy. Moreover, the photocatalytic activities of BiOBr/MIL-88B(Fe) composites and the pure materials were evaluated by measuring the degradation of Rhodamine B under visible light. The results show that the composite exhibits better photocatalytic activities than pure materials, which can be ascribed to the high adsorption capacity of MIL-88B(Fe) and the enhanced separation of photogenerated charge carriers from assembly of MIL-88B(Fe) on BiOBr. And the effects of various operating parameters such as catalyst dosage, medium pH, the mass ratio of BiOBr, and MIL-88B(Fe) and the dye initial concentration on the degradation of RhB have been studied.
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高影响因子
RSC Advances
·
2014
·Vol. 4
·期 81
·42991-42995
·
IF 3.708
He Sun,Haobo Sun,Wei Wang,Handong Jiao,Shuqiang Jiao
Insoluble Prussian blue (IPB), Fe4[Fe(CN)6]3, is synthesized at room temperature and found to achieve a relatively high storage capacity of 146 mA h g−1 (at a 20 mA g−1 rate) as the cathode material for Na-ion batteries with high potential plateaus. XRD, SEM and TEM are employed to characterize the morphology and microstructure of the as-synthesized IPB. First-principles calculation is introduced to study the electrochemical mechanism. Generally, the environmental friendliness and low cost of the material make it possible to be used for large-scale electric storage applications.
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ANALYTICA CHIMICA ACTA
·
2016
·
IF 4.712
Qiong Hu,Baojing Zhou,Pengyun Dang,Lianzhi Li,Jinming Kong,Xueji Zhang
We report a versatile approach for the colorimetric assay of alkaline phosphatase (ALP) activity based on the distinctive metal-to-ligand charge-transfer (MLCT) absorption properties of Fe(II)-phenanthroline reporter. In the presence of ALP, the applied substrate ascorbic acid 2-phosphate is enzymatically hydrolyzed to produce ascorbic acid, which then reduces Fe 3+ to Fe 2+ . The complexation of Fe 2+ with the bathophenanthroline disulfonate (BPS) ligand generates a blood-red Fe(BPS) 3 4− reporter, which is characterized by an intense MLCT absorption band at 535 nm in the visible range. Under optimal conditions, the spectral output exhibits a good quantitative relationship with ALP activity over the range of 0–220 mU mL −1 with a detection limit of 0.94 mU mL −1 . Moreover, the activity of ALP can also be conveniently judged through naked-eye observations. Results indicate that it is highly selective and can be applied to the screening of ALP inhibitors. In addition, it has been successfully employed to detect the endogenous ALP level of undiluted human serum samples, with a detection limit of 1.05 mU mL −1 being achieved. This approach avoids any elaborately designed substrates and holds considerable simplicity and flexibility for reporter design. This study broadens the horizon of the applications of phenanthroline-based transition metal complexes. Furthermore, an efficient and practical method like this has the potential to be widely used in clinical applications and in the point-of-care testing.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2015
·Vol. 23
·期 7
·6758-6766
·
IF 2.828
Fu Xiaori,Gu Xiaogang,Lu Shuguang,Miao Zhouwei,Xu Minhui,Zhang Xiang,Danish Muhammad,Cui Hang,Farooq Usman,Qiu Zhaofu,Sui Qian
Effective degradation of benzene was achieved in sodium percarbonate (SPC)/Fe(II)-Glu system. The presence of glutamate (Glu) could enhance the regeneration of Fe(III) to Fe(II), which ensures the benzene degradation efficiency at wider pH range and eliminate the influence of HCO 3
− in low concentration. Meanwhile, the significant scavenging effects of high HCO 3
− concentration could also be overcome by increasing the Glu/SPC/Fe(II)/benzene molar ratio. Free radical probe compound tests, free radical scavenger tests, and electron paramagnetic resonance (EPR) analysis were conducted to explore the reaction mechanism for benzene degradation, in which hydroxyl radical (HO•) and superoxide anion radical (O 2
•− ) were confirmed as the predominant species responsible for benzene degradation. In addition, the results obtained in actual groundwater test strongly indicated that SPC/Fe(II)-Glu system is applicable for the remediation of benzene-contaminated groundwater in practice.
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Journal of Environmental Sciences
·
2024
·
IF 5.9
Yuming Huang,Lin Liu,Hang Yang,Huixuan Yi,Xiangyu Li,Linqian Li,Dawei Lu,Qian Liu,Guibin Jiang
Accurately distinguishing between the endogenous formation and exogenous exposure of Fe-bearing particles (e.g., magnetic Fe particles) within biological organisms is the prerequisite for scientifically evaluating their health risks. However, this remains a challenging task due to lacking the comprehensive understanding of the endogenous formation process of Fe-bearing particles. Here, we report the formation dynamics of Fe-bearing particles under conditions closely resembling actual physiological conditions, and compare the morphological and structural differences between endogenous and exogenous Fe-bearing particles. We find that Fe-bearing particles can indeed form under physiological conditions at 37°C. In this process, phosphate plays a crucial role in the oxidation and mineralization of iron ions. Moreover, endogenously formed Fe-bearing particles typically have a diameter of less than 8 nm, and iron is the only metal element present. Therefore, we propose that Fe-bearing particles found in the body with a diameter larger than 8 nm are mainly derived from exogenous exposure. For Fe-bearing particles smaller than 8 nm, it is necessary to combine associated elements and crystal structure characteristics to distinguish between endogenous and exogenous sources. This study provides direct evidence from endogenous metabolism for tracing Fe-bearing particles, especially magnetic iron particles, within the human body.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi Yu,Fanfan Li,Shengbo Ge,Xingchuan Yang,Mashallah Rezakazemi,Shuangquan Zang,Tejraj M. Aminabhavi,Li Xu
Homogeneous mixed iron-manganese oxide nanoparticles prepared from bimetallic MOFs were examined for their catalytic performance to examine toluene degradation. Introducing Fe into Mn 2 O 3 to obtain Mn 2-x Fe x O showed significantly improved catalytic combustion of toluene compared to single manganese or iron oxide. Among these catalysts, Mn 1.82 Fe 0.18 O 3 exhibited optimal catalytic performance showing the lowest T 10 , T 50 and T 90 in weight hourly space velocity (WHSV) of 60000 mL·(g·h) -1 . In high-water content atmosphere, catalytic activity was excellent even after four cycles and such a good catalytic performance of Mn 1.82 Fe 0.18 O 3 might be due to the high surface area (103 m 2 ·g −1 ) and uniform doping of Fe caused by MOFs roasting. Fe doping enhanced the weak acid sites onto Mn 2 O 3 surface, thus promoting the activation of toluene. The doped Fe elongated M = O bond to enhance the nucleophilicity of the active sites, which increased the intrinsic activity of Mn 2 O 3 catalyst. This study could serve as a reference for active sites modification of metal oxide catalysts.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yi Gao,Tingting Chu,Chengyu Zhou,Wensheng Huang,Yin Zheng
In this paper, iron–copper bimetallic nanosheet materials (FeCu/CNS) were prepared using hydrothermal and pyrolysis methods to develop a dual-mode electrochemical and colorimetric sensing platform for detecting acetaminophen (ACM). The glassy carbon electrode (GCE) was modified with FeCu/CNS to enhance its electrocatalytic activity and develop an electrochemical sensor for detecting ACM. The linear range of the sensor was 0.01–7 × 10–6 mol/L, and the detection limit (LOD) was 2.5 × 10–8 mol/L. In addition, FeCu/CNS possesses an efficient peroxidase-like activity that converts colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue oxidized state product (oxTMB) in the presence of H2O2, which exhibits a characteristic absorption peak around 652 nm. However, ACM has reducing properties and can reduce oxTMB to TMB, thereby reducing the intensity of the characteristic absorption peak of oxTMB. Based on this principle, a colorimetric sensor was constructed for the detection of ACM, which had a linear range of 0.5–1625 × 10–6 mol/L and an LOD of 2.63 × 10–6 mol/L. Compared with other single methods, the method exhibited a wider linear range and lower detection limit, confirming the complementary and superior nature of the dual-mode sensor designed in this paper for ACM detection. Meanwhile, the detection of ACM in human serum was also carried out with satisfactory results.
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SCRIPTA MATERIALIA
·
2024
·
IF 5.3
Mengyun Jia,Dingliang Liang,Qing Du,Hui Wang,Yuan Wu,Suihe Jiang,Xiaobin Zhang,Haihui Ruan,Xiongjun Liu,Zhaoping Lu
Magnetothermal therapy (MT) is a noninvasive cancer treatment that has shown great promise in recent years. However, the low magnetothermal efficiency of the existing magnetic nanoparticles used in MT has been an obstacle to their widespread applications. In this work, we report a new class of Fe-Co-Ni-Cu high-entropy magnetic nanoparticles (HEMNPs) with exceptional magnetothermal properties synthesized by a thermal decomposition method. The fabricated HEMNPs, having an average diameter of 60–70 nm, exhibited a saturation magnetization of 42.4 emu/g and coercivity of 129.5 Oe. The hyperthermia measurement reveals that the HEMNPs have a maximum specific loss power of 202 W/g at the concentration of 2 mg/ml under an alternating magnetic field with an intensity of 46 Oe and a frequency of 266 kHz, demonstrating the great potential for MT applications. Our results demonstrate that the high-entropy concept can be extended to develop high-performance magnetic nanoparticles for MT applications.
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Nano Research
·
2024
·
IF 9.5
Zhao Yuan,Wang Qingshuang,Yin Dongming,Wang Xiaoli,Li Shouliang,Wang Chunli,Liang Long,Zhao Shaolei,Wang Limin,Cheng Yong
α-AlH 3 is regarded as one of the most promising hydrogen storage materials due to its high hydrogen storage capacity (10.1 wt.%, 148 kg·m −3 ). However, in practical applications, the associated hydrogen release temperature remains relatively high. To effectively address this issue, hollow structured Fe@C nanorods derived from Fe-MOF are introduced as highly efficient catalyst to optimize the dehydrogenation properties of α-AlH 3 . Comparatively, the initial hydrogen release temperature of α-AlH 3 + 3 wt.% Fe@C is reduced to 94.2 °C, which is significantly lower than that of pure α-AlH 3 (137.8 °C). At 100 and 120 °C, it exhibits hydrogen capacities of 5.38 wt.% and 7.47 wt.%, respectively, whereas pure α-AlH 3 only delivers hydrogen capacities of 0.24 wt.% and 5.94 wt.% under the same temperatures. The density functional theory (DFT) calculations further indicate that the existence of Fe@C catalyst can make the length of Al–H bond increase, which is more conducive to the release of hydrogen. The results show that the synergistic effect of Fe and porous carbon in Fe@C nanorods can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage fields.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dongwei Xu,Zhihao Shen,Mingju Zhang,Xinyuan Li,Lu Deng,Yeqi Ren,Biao Zhao,Xiaoqin Guo,Ping Chen
The rational structural design and compositional merits as well as the synergistic coupling effect can break the properties of single material and broaden the microwave absorption band. Herein, the unique lightweight Fe-doped MnO 2 @C hollow nanocubes are rationally designed and successfully synthesized via a scalable wet chemical process and polydopamine coating followed by high-temperature calcination . By virtue of the unique structure and compositional merits, the as-obtained Fe-doped MnO 2 @C hollow nanocubes (Fe–MnO 2 @C-HNBs) displayed notable microwave absorption performance (MAP), simultaneously achieving ultra-broad absorption bandwidth and strong absorption characteristics at a low thickness of 2.3 mm (the reflection loss of −41.02 dB and the effective absorption bandwidth of 5.86 GHz). Surprisingly, the effective absorption bandwidth (RL < −10 dB) could reach up to 8.08 GHz and the minimum reflection loss (RLmin) was −38.20 dB at the thickness of 2.7 mm. The results further confirmed that the excellent microwave attenuation ability of the as-prepared Fe–MnO 2 @C-HNBs composites benefitted from the special “air@core-shell” structure and multiple heterointerfaces as well as multi-component recombination. These results demonstrated that the as-obtained Fe–MnO 2 @C-HNBs composites could be attractive candidates for broadband microwave absorption materials .
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiyong Wei,Aijia Cao,Siyuan Huang,Yao Shen,Ting Lei,Songmei Luo,Mingjun Cai,Wenjun Xiang,Anying Chen,Rui Wang
Although MIL-100(Fe) was regarded as an ideal material for the environmental remediation, it could not be applied in practical because of the potential eco-environmental risk and cost. In this work, a novelty strategy of liquidizing crystal MIL-100(Fe) was posted for the first time through inhibiting the crystallization process and forming physical MIL-100(Fe) gel. Due to this MIL-100(Fe) sol–gel, MIL-100(Fe) could easy cover on the surface of silica powder (SiO 2 ) through simple soaking operation. MIL-100(Fe) covering on SiO 2 (MIL-100(Fe)@SiO 2 ) could be quickly separated from wastewater spontaneously owing to the carrier of SiO 2 , even in a tank of 2.0 m, which made it possible for purifying wastewater in practical. MIL-100(Fe)@SiO 2 could remove phosphate with a removing ratio of closing 100 % at an initial concentration of 10 mg/L, while more than 95 % towards methyl orange (MO). The removing ratio of MO by MIL-100(Fe)@SiO 2 did not obviously decrease when the concentration of MO increased to 100 mg/L. And the adsorption performance of phosphate did not affect by pH among 3.0–9.0. The adsorption amount exceeded 50 % of maximum adsorption capacity for phosphate within 30 min, while 90 % for MO. Monodentate mononuclear coordination could explain the adsorption of phosphate by MIL-100(Fe)@SiO 2 . The N atom in MO might be acted as Lewis acid to coordinate with MIL-100(Fe)@SiO 2 . After adsorption, the P-saturated and MO-saturated MIL-100(Fe)@SiO 2 could be effectively regenerated by the dilute HCl and NaOH solution, respectively. The recovery ratio of adsorption capacity for phosphate and MO were up to 97.7 % and 71.6 %.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Bangjian Liu,Hong Yang,Huiqing Xu,Quanjie Liu,Shuandi Hou,Anfeng Zhang,Xinwen Guo
Effective regulation of acid sites is essential to strengthen the reaction performance and to modulate product distribution of an isomerization reaction. In this study, ZSM-50 (Al-EUO) and Fe-substituted ZSM-50 zeolites, namely FeAl-EUO-n (n = 0.25, 0.50 and 0.75) and Fe-EUO, are synthesized by a seed-assisted hydrothermal method. The study has shown that Fe has effectively entered the Al-EUO framework as a tetrahedrally-coordinated species. More importantly, the Fe-substitution has resulted in a significant increase in the amount of surface weak- and medium-strength Brönsted acids and a reduction in the strength of strong acids of FeAl-EUO-n. This study also evaluates the catalytic performance of Pt/FeAl-EUO-n catalysts in n-heptane hydroisomerization. It shows that the introduction of Fe in ZSM-50 greatly enhances the isomer yield, achieving a maximum yield of 66.1 % at 320 °C over Pt/FeAl-EUO-0.50 compared to 16.4 % at 300°C over Pt/Al-EUO. At the same time, the fraction of multi-branched iso -heptane also increases noticeably in the reaction product.
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