Frontiers of Chemical Science and Engineering
·
2023
·Vol. 17
·期 7
·930-941
·
IF 4.5
Tian Guodong,Duan Chao,Zhou Bingxu,Tian Chaochao,Wang Qiang,Chen Jiachuan
Membrane technology for wastewater remediation has aroused wide interest owing to its unique properties and potential applications. However, it remains challenging to explore green, efficient and robust membrane material and technique for complex wastewater treatment. Herein, we proposed using a simple electrospinning and in situ seeding method to fabricate a lignin-based electrospun nanofiber membrane (LENM) decorated with photo-Fenton Ag@MIL-100(Fe) heterojunctions for efficient separation of oil/water emulsions and degradation of organic dye. Thanks to the embedded lignin in LENM, an ultrahigh MIL-100(Fe) loading (53 wt %) with good wettability and high porosity was obtained. As a result, the hybrid Ag@MIL-100(Fe)/LENM exhibited excellent oil/water emulsions separation efficiency (more than 97%) without a compromise of water flux. Moreover, the hybrid membrane showed an excellent dye removal with degradation of 99% methylene blue within 30 min under illumination, which is attributed to a synergy of dye adsorption/enrichment and photo-Fenton catalytic degradation from Ag@MIL-100(Fe). Therefore, the lignin-based photo-Fenton hybrid membrane can lay the foundation for the preparation and application of green, sustainable and versatile membrane materials and technologies for efficient complex wastewater remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
水处理技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Baicheng Yuan,Xinyi Huang,Shaojinlin Yang,Yi Yang,Zhihong Lin,Raphael Semiat,J. Paul Chen
Heavy metal contamination has become one of the greatest global environmental problems. In this study, a magnetic calcium-alginate hydrogel-sphere encapsulated with Fe–Mn–Zr ternary-metal composite (MCHETC) was prepared through a combined co-precipitation and extrusion approach and used for the adsorption of heavy metals in aqueous solutions. The active sites were dispersed in the MCHETC, which can be separated by the magnetic force for the ease in operation. Above 80% of ultimate adsorption was completed at a contact time of 5 h. The copper uptake history was well described by the intraparticle surface diffusion model, suggesting a multi-step process for the adsorption. The optimum pH for adsorption was 4; the maximum adsorption capacity was 103.1 mg-Cu/g. The adsorption capability well remained after the 5 adsorption–desorption cycles and the copper could be recovered. Furthermore, the adsorbent performed well in the nature water spiked with copper ions. The mechanism studies illustrated that the adsorption was mainly controlled by the ion-exchange reaction. This study demonstrated that the MCHETC adsorption technology may be used for heavy metal removal and recovery with higher efficacy.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Jingli Ren,Yutong Liu,Weimin Cao,Liyang Zhang,Fen Xu,Juan Liu,Yubo Wen,Jian Xiao,Lei Wang,Xiaoxiong Zhuo,Junfeng Ji,Yuanyuan Liu
Sediment-associated Fe(II) is a critical reductant for immobilizing groundwater contaminants, such as Cr(VI). The reduction reactivity of sediment-associated Fe(II) is dependent on its binding environment and influenced by the biogeochemical transformation of other elements (i.e., C, N and Mn), challenging the description and prediction of the reactivity of Fe(II) in natural sediments. Here, anaerobic batch experiments were conducted to study the variation in sediment-associated Fe(II) reactivity toward Cr(VI) in natural sediments collected from an intensive agricultural area located in Guangxi, China, where nitrate is a common surface water and groundwater contaminant. Then, a process-based model was developed to describe the coupled biogeochemical processes of C, N, Mn, Fe, and Cr. In the process-based model, Cr(VI) reduction by sediment-associated Fe(II) was described using a previously developed multirate model, which categorized the reactive Fe(II) into three fractions based on their extractabilities in sodium acetate and HCl solutions. The experimental results showed that Fe(II) generation was inhibited by NO 3 - and/or NO 2 − . After NO 3 − and NO 2 − were exhausted, the Fe(II) content and its reduction rate toward Cr(VI) increased rapidly. As the Fe(II) content increased, the three reactive Fe(II) fractions exhibited approximately linear correlations with aqueous Fe(II) concentrations ( C F e 2 + ), which was probably driven by sorptive equilibrium and redox equilibrium between aqueous and solid phases. The model results indicated that the reaction rate constants of the three Fe(II) fractions ( k n ) significantly increased with incubation time, and log( k n ) correlated well with C F e 2 + [ log ( k 1 ) = 2.84 C F e 2 + − 0.17 , log ( k 2 ) = 5.90 C F e 2 + − 2.49 and log ( k 3 ) = 3.09 C F e 2 + − 3.37 ]. The numerical model developed in this study provides an applicable method to describe and predict Cr(VI) removal from groundwater under dynamic redox conditions .
研究领域:
环境科学
·
地球化学
·
水文地质学
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生物地球化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-9
·
IF 5.833
Senosy Ibrahim Abdelhai,Zhang Xin-Zhong,Lu Zhi-Heng,Guan Xiao-Yu,Yang Zhong-Hua,Li Jian-Hong,Guo Hao-Ming,Abdelrahman Talat Mahmoud,Mmby Mohamed,Gbiliy Asmaa
Fe 3 O 4 @MIL-100 (Fe)/PEI are used for the first time as an adsorbent material for the extraction of pesticide residues (epoxiconazole, flusilazole, tebuconazole, and triadimefon) from food matrices. The adsorbent proposed (Fe 3 O 4 @MIL-100(Fe)/PEI) was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), thermogravimetric (TG) analysis, and vibrating sample magnetometer (VSM) techniques to evaluate the properties of the sorbent. Then, the Fe 3 O 4 @MIL-100 (Fe)/PEI was employed for the quantification of the four triazole fungicides in fruits and vegetables (apple, orange, tomato, cabbage, and cucumber) using HPLC-UV for separation and detection. During the extraction process, the main parameters such as amount of adsorbent, extraction time, pH value, ionic strength, eluting solvent, and eluting volume were optimized. Under the optimum conditions, good linearity of this method was observed for all analytes, with correlation coefficients ( R 2 ) ≥ 0.9908. The limits of detection (LODs) ranged from 0.021–3.04 μg kg −1 . The extraction recoveries of the four triazole fungicides varied from 73.9 to 109.4% with relative standard deviations (RSD) in the range 0.5 to 6.2%. Compared with other MOFs, the modification of Fe 3 O 4 @MIL-100 (Fe) with PEI shows high efficient adsorption due to the combined benefits of MIL-100 (Fe) and PEI. The material is easily synthesized, has good stability, and is of low cost.
Graphical abstract
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2014
·
IF 2.063
Jianrong Li,Jinsheng Chen,Yanke Yu,Chi He
The Fe–Mn–Ce/CP catalyst prepared by the incipient-wetness impregnation method was investigated for elemental mercury (Hg 0 ) removal in simulated coal-fired flue gas . The incorporation of Fe could remarkably enhance the SO 2 -resistance of Fe–Mn–Ce/CP catalyst at low temperature, and the existence of water vapor had negative impact on Hg 0 removal efficiency. More than 95% of Hg 0 could be removed at 100 °C under the conditions of 60 ppm HCl, 3% O 2 ( v/v ), 5% H 2 O ( v/v ) and 400 ppm SO 2 . Hg-TPD results indicated that Hg 0 adsorption amount decreased after the addition of H 2 O or SO 2 . The XPS results revealed that the incorporation of Fe could enhance the contents of high valence Mn x + (i.e., Mn 3+ /Mn 4+ ) and Ce 3+ species in the composite catalysts, which are favorable for the oxidation process of elemental mercury. The surface characteristics were not the primary factor determining the catalytic activity . Overall, the catalytic performance of the Fe–Mn–Ce/CP catalyst was closely related to the Fe 3+ state, high ratios of (Mn 4+ + Mn 3+ )/Mn 2+ and high content of not fully coordinated cerium species.
研究领域:
环境催化
·
大气污染防治
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能源化学工程
·
材料科学与工程
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表面化学
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烟气净化技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Dekang Huang,Yanping Luo,Shaohui Li,Mingkui Wang,Yan Shen
To realize a large-scale application of fuel cells, it is highly desirable to develop noble metal-free electrocatalysts for oxygen reduction reaction (ORR). Herein, a highly active electrocatalyst is synthesized by impregnating in situ generated iron(III)-1,10-phenanthroline complex on commercially high specific surface area carbon blacks and subsequent pyrolysis at high temperature. High ORR limiting current density (5.79 mA cm −2 ) and positive half-wave potential (0.859 V versus RHE) over this electrocatalyst with a mass loading of 0.2 mg cm −2 can be achieved in 0.1 M KOH solution, which are very comparable with the benchmark Pt/C electrocatalyst. Detailed investigations have revealed the existence of nitrogen doped carbon (N-C), nitrogen coordinated to Fe (Fe-N), and Fe@Fe 3 O 4 core-shell nanoparticles in this composite electrocatalyst. The high activity of this electrocatalyst is attributed to the synergistic effect among them.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2023
·Vol. 17
·期 2
·1-11
·
IF 2.7
Xiao He,Xue Shoufeng,Fu Zimei,Zhao Man,Zhang Li,Zhang Junming,Wu Haishun,Jia Jianfeng,Yang Nianjun
Developing high-activity and low-cost catalysts is the key to eliminate the limitation of sluggish anodic oxygen evolution reaction (OER) during electrocatalytic overall water splitting. Herein, Ni–Fe/black phosphorous (BP) composites are synthesized using a simple three-electrode system, where exfoliation of bulky BP and synthesis of NiFe composites are simultaneously achieved. Under light illumination, the optimized Ni–Fe/BP composite exhibits excellent photoelectrocatalytic OER performance (e.g., the overpotential is 58 mV lower than a commercial RuO 2 electrocatalyst at a current density of 10 mA·cm −2 ). The electron transfer on this composite is proved to follow a Ni–BP–Fe pathway. The electronic structure of this Ni–Fe/BP composite is effectively regulated, leading to optimized adsorption strength of the intermediate OH* and improved intrinsic activity for the OER. Together with active sites on the support, this Ni–Fe/BP composite possesses abundant electrochemical active sites and a bug surface area for the OER. The introduction of light further accelerates the electrocatalytic OER. This work provides a novel and facile method to synthesize high-performance metal/BP composites as well as the approaches to reveal their OER mechanisms.
研究领域:
电化学
·
催化
·
材料科学
·
纳米技术
·
能量转换
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Shuhao Li,Feng Wang,Zongli Xie,Derrick Ng,Boxiong Shen
Zeolitic imidazolate framework-8 (ZIF-8) based catalysts are considered as promising candidates for the selective catalytic reduction of NO by CO (CO-SCR) reaction due to their large specific surface area. However, the structure of ZIF-8 will be damaged during the synthesis procedure of the catalyst, leading to a decrease in their physical properties, which in turn affects the catalytic performance of the catalyst. Herein, a CeO 2 -ZIF-8 core-shell structure was synthesized and doped with Fe, resulting in the formation of Fe@CeO 2 -ZIF-8, for CO-SCR reaction. Characterization results show that the Fe@CeO 2 -ZIF-8 core-shell catalyst has better morphology, thermal stability, and higher specific surface area than the FeCe co-impregnated ZIF-8 catalyst (FeCe@ZIF-8 (IM)). Moreover, the reducibility of the reactive Fe species in the Fe@CeO 2 -ZIF-8 core-shell catalyst is also enhanced. As a result, the Fe@CeO 2 -ZIF-8 core-shell catalyst exhibited higher low-temperature CO-SCR catalytic activity with its NO conversion reaching 99% at 250 °C versus the FeCe@ZIF-8 (IM) catalyst (89% at 250 °C). The experimental results were further verified by density functional theory (DFT) calculations including Electron Localization Function (ELF), Valence Charge Density Difference (VCDD), Projected Density of States (PDOS) and Bader charge analyses. The calculation results revealed that the core-shell configured Fe@CeO 2 -ZIF-8 catalyst has a stronger active metal-support charge transfer and better capacity for the adsorption of the reactants. The reaction mechanism over Fe@CeO 2 -ZIF-8 core-shell catalyst was investigated via in situ DRIFTS experiments, and results showed that the nitro compounds and formate species are critical intermediates in this reaction at a higher temperature range (300–350 °C). This work provides a new strategy for the synthesis of ZIF-8 based catalysts with better properties for CO-SCR reaction.
研究领域:
催化化学
·
环境化学
·
材料科学
·
物理化学
·
能源化学
·
表面科学
·
纳米材料
✓ 已验证
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2023
·Vol. 34
·期 4
·1751-1764
·
IF 4
Zhou Zhuyou,Zou Congyang,Wang Yong,Liu Menghe,Ji Yufeng
A one-step solvothermal synthesis technique was employed to fabricate C 60 /MIL-101(Fe) composites. The C 60 /MIL-101(Fe) composites showed a better performance in the degradation of methylene blue (MB) and tetracycline hydrochloride (TCH) when compared to MIL-101(Fe) in the photo-Fenton system, which can be credited to the charge transfer and separation facilitated by the addition of C 60 . Results showed that C 60 /MIL-101(Fe) had the capacity to nearly completely eliminate TCH and MB over a broad pH range. The catalysts demonstrated remarkable catalytic degradation on various organic pollutants and water samples. Through active substance quenching experiments and EPR, it was determined that hydroxyl radical (·OH) is the main factor in the photocatalytic reaction process.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 59
·54623-54635
·
IF 3.289
Jing Wang,Chao Liu,Ijaz Hussain,Cheng Li,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang
A series of iron–copper bimetallic nanoparticles supported on hollow mesoporous silica spheres with different Fe/Cu ratios were prepared using a simple post-impregnation and sodium borohydride reduction strategy. Different Fe/Cu ratios were obtained by addition of various amounts of ferric and copper salts. The catalysts were characterized by XRD, XPS, nitrogen physisorption, SEM and TEM. To explore the difference of catalytic reactivity among the various FeCu/HMS composites, Fenton-like catalytic oxidation of orange II was chosen as the model catalysis reaction. The catalytic results showed that the catalytic activity depended highly upon the Fe/Cu ratio. Particularly, 1/3 (2Fe6Cu/HMS) is the optimum Fe/Cu mass ratio to achieve the best catalytic activity. Based on the results of detection of ˙OH radicals and cyclic voltammograms, the important origin of the synergetic effect in 2Fe6Cu/HMS is considered as the combination of iron and copper species, which can accelerate the interfacial electron transfer in redox cycles of Fe3+/Fe2+ and Cu2+/Cu+ pairs, followed by the increase in the ˙OH radical generation. The 2Fe6Cu/HMS also possesses less pH dependence and maintains its high activity even under alkaline conditions. The optimal parameters in the degradation of 100 mg L−1 orange II are 27.4 mM of H2O2 with 1.0 g L−1 of catalyst, performed at a pH of 7.0 and 30 degree celsius. It is worth noting that 2Fe6Cu/HMS also possesses potential to treat a high concentration of dye pollutants. 77.7% of orange II was removed when conducted at 1000 mg L−1 initial dye concentration. The stability and recoverability of the composite catalyst were assessed it exhibited a good performance after 5 consecutive runs. The as-synthesized composite catalyst proved to be an attractive alternative for dye wastewater treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhiyang Qin,Tianyue Peng,Xinguang Qin,Gang Liu,Haizhi Zhang
Accurate detection of tetracycline residue is of great significance for ensuring product quality and protecting human health. Here, a colorimetric/fluorescent dual-mode biosensor was developed for the detection of tetracycline in honey by using metalloporphyrin [TCPP(Fe)] covalently modified NH 2 -MIL-101(Fe) [named NH 2 -MIL-101(Fe)@TCPP(Fe)]. The morphology, chemical structure and peroxidas-like activity of this hybrid nanozyme were comprehensively studied. Based on excellent catalytic activity and intrinsic fluorescence of NH 2 -MIL-101(Fe)@TCPP(Fe), a colorimetric/fluorescent dual-mode biosensor was developed for the detection of tetracycline. The primary mechanism for this dual mode biosensor was the inhibitory effect of tetracycline on on NH 2 -MIL-101(Fe)@TCPP(Fe) catalyzed chromatic reaction between H 2 O 2 and 3,3′,5,5′-tetramethylbenzidine (TMB)/ o -phenylenediamine (OPD), which was ascribed to the consumption of · OH by tetracycline and the adsorption of tetracycline on the surface of NH 2 -MIL-101(Fe)@TCPP(Fe). After effective validation, this colorimetric/fluorescent dual mode method was applied to detect tetracycline residues in three actual honey samples.
研究领域:
生物化学
·
分析化学
·
食品安全检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yibo Zhang,Peng Hu,Yaseen Muhammad,Ying Tang,Shan Shao,Zhu Gao,Jiaxing Wang,Ruimeng Wang,Yang Hu,Lihan Kuang,Zhongxing Zhao,Zhenxia Zhao
Hollow nano-sphere NH 2 -MIL88(Fe) (HS NMIL88(Fe)) with interfacial defects was fabricated to load laccase as a host. Through metal multi-coordination, dopamine engineered large amount of defective pores with large size on NH 2 -MIL88(Fe) interface. This defect-interfacial structure provided a high-density host for laccases, which efficiently protected enzyme from structure deformation and then inhibited inactivation. Besides, the unique hollow structure will help to fasten reactant diffusivity, and thus improved the catalytic reaction process. Experimental results showed that the maximum immobilized capacity and maximum activity recovery for laccase reached up to 213.2 mg/g and 75.8% beyond many state-of-the-art enzyme hosts, respectively. Meanwhile, the immobilized laccase exhibited better pH, thermal and storage stabilities on HS NMIL88(Fe) than free and loaded on NMIL88(Fe) ones. Thermal deactivation kinetics analysis showed that HS NMIL88(Fe)-Lac had much higher apparent activation energies of (105.2 kJ/mol) than that of free laccase (89.2 kJ/mol). Catalyzing decolorization performance of dye Remazol Brilliant Blue R (RBBR) was finally carried out and exhibited the decolorization rate of 1.8 times and 2.6 times faster than solid NMIL88(Fe)-Lac and free laccase, respectively. Moreover, the interaction mechanism of laccase for RBBR was investigated and revealed by molecular docking.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）