BIOSENSORS & BIOELECTRONICS
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2021
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IF 10.618
Yu Wang,Xitong Zhou,Wanxin Dong,Qinsong Zhong,Xinxin Mo,He Li
In this work, we synthesized Fe-Tcpp@ICG(ICG, Indocyanine green) with light stimuli-response through 5,10,15,20-tetrakis (4-carboxyphenyl) porphyrin (Fe-Tcpp) loaded ICG by electrostatic adsorption. The morphology and properties of Fe-Tcpp and Fe-Tcpp@ICG were characterised by ultraviolet–visible absorption spectrometer, X-ray diffraction, thermogravimetric analyzer and transmission electron microscope , respectively. A non-enzymatic photoelectrochemical sensor based on Fe-Tcpp@ICG was constructed to quantitatively detect hydrogen peroxide in tumor microenvironment . Under the optimal conditions, the linear range of detecting hydrogen peroxide was 0.01–50 mmol/L with detection limit of 0.2 μmol/L (S/N = 3). This sensor proposed a simple, fast, sensitive and label-free method for the detection of hydrogen peroxide. Moreover, the results also showed that the Fe-Tcpp@ICG can catalyze the decomposition of hydrogen peroxide to generate singlet oxygen, which can kill tumor cells. These indicated that this material was expected to be used for detecting hydrogen peroxide and inhibition of tumor cell growth.
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高影响因子
POLYMER INTERNATIONAL
·
2021
·Vol. 71
·期 2
·169-174
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IF 2.99
Yinyan Chen,Yiban Wu,Yifan Zhu,Saiqi Tian
Rhodamine salicylaldehyde was synthesized, and its structure was determined using Fourier transform infrared spectroscopy, 1 H NMR analysis as well as electrospray ionization mass spectrometry. Then a fluorescent polyurethane foam was obtained via incorporation of the prepared rhodamine salicylaldehyde, and the fluorescence sensing behavior for Fe 3+ was systematically investigated. Results showed that the fluorescent polyurethane foam produced higher fluorescence in the presence of Fe 3+ in pure water, due to the coordination for Fe 3+ binding leading to ring-opened amide form. The limit of detection was calculated to be 1.64 × 10 −6 mol L –1 . This fluorescent polyurethane foam can also recognize Fe 3+ with good selectivity. © 2021 Society of Industrial Chemistry.
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FUEL
·
2021
·
IF 6.609
Mingquan Li,Aqsa Noreen,Yajie Fu,Cederick Cyril Amoo,Yujia Jiang,Xu Sun,Peng Lu,Ruiqin Yang,Chuang Xing,Shurong Wang
Directly synthesizing olefins from syngas using metal-zeolite composite catalysts has engrossed a lot of attention recently. Fe-based catalysts will be the most promising industrial candidates due to cost and availability constraints. In this work, we investigate the characteristics and Fischer-Tropsch activity of a novel Fe@Na-ZSM-5 composite for one-step conversion of syngas to higher olefins (C 5+ ). The in-situ crystallization mechanism induced Na in the ZSM-5 as a Fe-based promoter which realized 52.5 % selectivity for gasoline of which ∼ 70% were olefins. Additionally, the promotion by the Na ions enhanced the formation of Fe 5 C 2 phases which in turn favored C–C coupling, high gasoline and olefins selectivity. Na type zeolite (Na-Zeolite) offers a novel Na electron promoter, which participate immensely in the development of heterogenous catalyst and functional materials.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 3
·4461-4473
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IF 4.223
Shao Jiang,Zhang Yi,Liu Zongtang,Fei Zhenghao,Sun Yufeng,Chen Ziyan,Wen Xiaoju,Shi Weizhong,Wang Dandan,Gu Chenggang
Organic palygorskite (OP)–supported Pd/Fe nanoparticles composite (OP-Pd/Fe) was prepared by stepwise reduction method. The removal capacity of 4,4′-dibrominated diphenyl ether (BDE15) by OP-Pd/Fe was compared with other various materials. For better understanding the possible mechanism, the synthesized and reacted OP-Pd/Fe materials were characterized by TEM, SEM, XRD, and XPS, respectively. The effects of major influencing parameters on the degradation of BDE15 were also studied. Benefit from the synergistic effect of the carrier and bimetallic nanoparticles, BDE15 could be completely debrominated into diphenyl ether (DE) under suitable conditions. A two-stage adsorption/debromination removal mechanism was proposed. The degradation of BDE15 with OP-Pd/Fe was mainly stepwise debromination reaction, and hydrogen transfer mode was assumed as the dominated debromination mechanism. The removal process fitted well to the pseudo first-order kinetic equation. The observed rate constants increased with increasing Pd loading and OP-Pd/Fe dosage while decreased with increasing initial BDE15 concentration, the tetrahydrofuran/water ratio, and the initial pH of the solution. The work provides a new approach for the treatment of PBDEs pollution.
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高影响因子
JACS Au
·
2021
·
IF 0
Yang Wu,Chunlei Pei,Hao Tian,Tao Liu,Xianhua Zhang,Sai Chen,Quan Xiao,Xianhui Wang,Jinlong Gong
The suppression of methane and coke formation over Ni-based catalysts for low temperature ethanol steam reforming remains challenging. This paper describes the structural evolution of Fe-modified Ni/MgAl2O4 catalysts and the influence of iron species on methane and coke suppression for low temperature ethanol steam reforming. Ni–Fe alloy catalysts are gradually oxidized by water to generate Ni-rich alloy and γ-Fe2O3 species at steam-to-carbon ratio of 4. The electron transfer from iron to nickel within Ni–Fe alloy weakens the CO adsorption and effectively alleviates the CO/CO2 methanation. The oxidation capacity of γ-Fe2O3 species promotes the transformation of ethoxy to acetate groups to avoid methane formation and the elimination of carbon deposits for anticoking. Ni10Fe10/MgAl2O4 shows a superior performance with a highest H2 yield of 4.6 mol/mol ethanol at 400 °C for 15 h. This research could potentially provide instructions for the design of Ni-based catalysts for low-temperature ethanol steam reforming.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Huihui Wu,Jingjing Yan,Xin Xu,Qianhui Yuan,Jinhang Wang,Jun Cui,Aijun Lin
Advanced oxidation processes (AOPs) are promising ways for oxidative degradation of organic pollutants. Atom-dispersed transition metal–nitrogen–carbon (M–N–C) materials exhibit excellent efficiency in activating peroxide bonds and have been extensively pursued for environmental remediation. However, M–N–C with single atoms suffer from intrinsic performance limit of complicated catalytic reactions due to structural simplicity and lack of synergistic active sites. Herein, derived from Fe/Cu–coordinated zeolitic imidazolate frameworks with molecular-scale cages, a well–designed catalyst featuring Fe–Cu dual–metal sites coordinated with N–doped carbon (Fe/Cu–N–C) was fabricated. Compared to the single-atom iron catalyst (Fe–N–C), Fe/Cu–N–C significantly enhanced the chloramphenicol removal rate from 0.073 to 0.093 min −1 due to the synergistic effects of Fe–Cu dual active site. Furthermore, Fe/Cu–N–C exhibits fantastic reactivity for peroxydisulfate (PDS) activation in a wide pH range (3.1 – 10.3). Density functional theory calculations revealed that Fe/Cu–N is the major active site, where electrons transfer from Cu to Fe ensure the low-valence state of Fe for catalytic oxidation. Besides, the optimization of adjacent Cu–N sites improves the bonding orbital distribution of Fe 3d orbitals and promotes the adsorption and cracking of PDS. These findings reveal the cooperative mechanism of Fe–Cu dual–atom site on PDS activation and develop a promising platform toward environmental purification.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shumin Li,Fan Wu,Rongbin Lin,Jin Wang,Chunxia Li,Zhengquan Li,Jun Jiang,Yujie Xiong
Fe-based metal-organic frameworks (MOFs) have shown promising applications in photocatalysis, yet they are incapable of photocatalytic H 2 production due to their inappropriate conduction band (CB) position and large overpotential for H 2 evolution. Herein, we present a facile strategy enabling the photocatalytic H 2 production over Fe-based MOFs through dye sensitization. A combination of characterization techniques with theoretical simulation reveals that dye sensitization can effectively inject energetic electrons into Fe-MOFs and elevate their quasi-Fermi level under light irradiation, overcoming the surface overpotential for H 2 production from water. Furthermore, deposition of Pt nanoparticles on Fe-MOFs can lower the overpotential for H 2 evolution toward further enhanced photocatalytic activity. This work provides insights into MOF band structure engineering at electronic level, and proves a concept that harnesses MOF materials for targeted photocatalytic applications they are originally not fit for.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Yue Yin,Ruolin Lv,Xiaoyang Li,Lu Lv,Weiming Zhang
Bimetallic Fenton catalyst has attracted widespread attention in refractory organics removal. Herein, we firstly investigated the influence of ZrO 2 structure features on H 2 O 2 activation in Zr-Fe bimetallic catalyst. The results show that the heterojunction structure will be formed after high temperature calcination , which makes the ability of Zr-Fe bimetallic catalyst to activate H 2 O 2 for bisphenol A degradation is 3.1 times higher than that of α-Fe 2 O 3 without Zr doping. Through characterization and density functional theory, it was identified that compared to (1 1 0) interface, the adsorption energy of H 2 O 2 on iron sites at (1 1 0)-(1 0 0) interface reduced by 1.27 kJ mol −1 , while the Fe–O bond length in the stable configuration of Fe-OOH increased by 0.16 Å, which was beneficial to the association and dissociation of H 2 O 2 on iron sites. Besides, the surface -OH of amorphous ZrO 2 in Zr-Fe bimetallic catalyst synthesized under low temperature conditions could promote HO 2 • /O 2 •- formation through the surface electron transfer, accelerating the Fe(III) reduction. In conclusion, this study reveals the influence of environment-friendly ZrO 2 structure features on H 2 O 2 activation, proposes a new insight into strengthening the synergistic effect between bimetals, and provides a reference for the structural optimization of bimetallic catalysts.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2021
·
IF 4.952
Yaru Han,Linpin Luo,Liang Zhang,Yi Kang,Hao Sun,Jie Dan,Jing Sun,Wentao Zhang,Tianli Yue,Jianlong Wang
Nanozymes have become a frontier of research recently and possess broad application prospects in the field of analytical sensing. Herein, a Fe–Mn bimetallic nanozyme (FeMnzyme) was proposed for colorimetric analysis of ascorbic acid (AA). The FeMnzyme, with high specific surface area, consisted of Fe–Mn mixed oxide amorphous core and α-FeOOH nanorod shell characterized by scanning electron microscope (SEM) and Powder X-ray diffraction (XRD). It exhibits typical oxidase-like properties to catalyze oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to generate visible blue oxidized TMB (oxTMB) without exogenous H 2 O 2 . Due to the reducibility of AA to oxTMB, the FeMnzyme/oxTMB system can be employed as a promising colorimetric sensor for quantitative analysis of AA. The method has a good linear concentration range of 8 μmol L −1 to 56 μmol L −1 , and the detection limit is as low as 0.88 μmol L −1 (3σ). Finally, the proposed biosensor has been favorably put into use to determine AA content in kiwi fruit, indicating its reliability for practical application.
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WATER RESEARCH
·
2021
·
IF 11.236
Jia Deng,Enlai Gao,Feng Wu,Zhixiong You,Xiaozhong Li,Shuxian Gao,Li-Zhi Huang
Atomic hydrogen (H•) is highly reactive for the hydrodechlorination of trichloroethylene (TCE). In this work, we found that the coprecipitation of Ni 2+ and Fe 2+ at neutral pH led to an unprecedented catalytic generation of H•. The generated H• effectively dechlorinate TCE to nontoxic ethylene and ethane, and Fe 2+ is the only electron donor. The abundant adsorbed H• produced with a Ni/Fe ratio of 0.4 enhances hydrogen evolution reaction causing a low efficiency for hydrodechlorination. In contrast, the active absorbed H• is generated in the crystal lattice of Ni-Fe hydroxides with a Ni/Fe ratio of 3.0 causing highly efficient hydrodechlorination of TCE. This work not only reveals the mechanism of catalytic hydrodechlorination by Ni-Fe hydroxides at neutral pH, but also provides a novel approach to detoxify TCE in contaminated water using facile precipitated Ni-Fe hydroxides.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Liyuan Wu,Pengpeng Guo,Xin Wang,Haiyan Li,Angzhen Li,Kaiyu Chen
Peroxymonosulfate (PMS) activation methods have attractive advantages in advanced oxidation process (AOPs) due to their powerful ability of directly or indirectly generating various reactive oxygen species (ROS). Herein, trace amount of Fe(III) ions were added into the commercial-CoS 2 /PMS system to improve the CoS 2 /PMS decomposition for organics removal. The organics removal efficiency could reach >90% towards methylene blue (MB), diclofenac sodium (DCF), sulfamethoxazole (SMX) and bisphenol A (BPA) in the CoS 2 /Fe(III)/PMS system, with the kinetic apparent rate constant k obs of 0.141, 0.206, 0.247 and 0.091 min −1 , respectively. The synergistic effect between Fe(III) ions and sulfur-vacancies on CoS 2 for PMS degradation were revealed for the first time in cobalt sulfides/PMS system. Quenching experiments and ESR analysis proved that 1 O 2 was the major ROS and was produced mainly by the hydrolysis of SO 5 • – . Besides, the high degradation efficiency was obtained by the contribution of SO 4 • – and • OH. Electron spin–resonance spectroscopy (ESR), cyclic voltammetry (CV) and Raman spectrum data revealed that the addition of Fe(III) ions could optimize the intensity of sulfur vacancies on the CoS 2 surface, which hindered the PMS reduction ability of Co(II), but accelerated the PMS oxidation to form 1 O 2 . The degradation path of MB was analyzed by liquid chromatograph-mass spectrometer (LC-MS). The mechanism studies speculated that the sulfur vacancies of CoS 2 provided the binding sites for Fe(III) ions with Co(II), which facilitated the PMS activation by Co(III).
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RENEWABLE ENERGY
·
2021
·
IF 8.001
Hui Li,Junchi Wang,Xiaoling Ma,Yangyang Wang,Guoning Li,Min Guo,Ping Cui,Wanpeng Lu,Shoujun Zhou,Mingzhi Yu
Solid catalyst loss is inevitable by using the traditional separation methods of centrifugation or filtration. To this end, the carbonized MIL−100(Fe) is used to support ammonium sulfate ((NH 4 ) 2 SO 4 ) for synthesizing magnetic solid acid on the purpose of biodiesel production . Influence of preparation factors of loading amount, activation temperature, and activation time on catalytic activity are initially evaluated. With that, the prepared catalyst (CIS) is comprehensively investigated to obtain the optimal esterification parameters for biodiesel production . Moreover, characterizations of TG, XRD, BET, SEM, EDS, FTIR, py−FTIR, VSM, XPS, and Hammett indicator are conducted to elucidate the structure−function relationship between physicochemical property and catalytic activity . Results indicated the CIS is a superparamagnetism material with the saturated magnetism of 22 emu/g, which could be easily recovered from mixture with external magnet. Furthermore, the maximum conversion of 95.68% is obtained with mild conditions: molar ratio of methanol/oleic acid of 8:1 and catalyst amount of 8 wt% at 70 °C for 2 h. Negligible impact is detected for CIS with presence of 5 wt% water content, even with 20 wt% water content, the conversion of 85.88% is still achieved.
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