CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yusi Tian,Minghua Zhou,Yuwei Pan,Xuedong Du,Qi Wang
Molybdenum sulfide (MoS 2 ) was for the first time used as a co-catalyst to enhance the performance of Fe 0 based heterogeneous electro-Fenton (Fe 0 -EF) process for the degradation of sulfamethazine (SMT), which was belonging to the sulfonamide family and extensively used as growth promoters and antibacterial drugs. Compared with Fe 0 -EF process, MoS 2 /Fe 0 -EF process could enhance the rate constant of SMT degradation 2 times under the optimal conditions of current 50 mA, MoS 2 dosage 0.02 g L -1 , Fe 0 dosage 0.224 g L -1 , and initial pH 4, in which SMT could be completely degraded within 10 min while 42% TOC could be achieved after 60 min reaction. The role of MoS 2 as co-catalyst in MoS 2 /Fe 0 -EF process and Fe 2+ /Fe 3+ cycle was supported by iron elemental analysis, transmission election microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) characterizations. Owing to the characteristics of co-catalysis, MoS 2 could greatly facilitate the Fe 3+ /Fe 2+ recycle reaction by the exposed Mo 4+ active sites, which significantly promoted the decomposition of H 2 O 2 that generated in Fe 0 -EF system and improved the generation of hydroxyl radical. Besides, a possible degradation pathway of SMT was proposed and the stability of MoS 2 /Fe 0 -EF process for SMT removal and TOC mineralization was certified base on five consecutive runs. The real wastewater test and energy consumption and economic analysis confirmed its advantage and cost-effectiveness for application. In all, this study provides a new perspective for improving heterogeneous Fe 0 -EF process with MoS 2 for highly efficient and rapid degradation of antibiotics.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2021
·
IF 7.132
Tianhao Wang,Yi Zhao,Huiru Zhang,Weitian Hui
Carbon dioxide (CO 2 ) emissions from the combustion of fossil fuels cause the intensification of greenhouse effect. Consequently, a new non-noble nanoalloy of Ni 0 , Cu 0 and Fe 0 was prepared for the production of formate (HCO 2 − ) from CO 2 in flue gas by hydride transfer reaction under atmospheric pressure and mild temperature in this work. Under the optimal reaction conditions obtained by experimental optimization, which were that catalyst dosage was 1 g·L -1 , KBH 4 concentration was 0.15 mol·L -1 , reaction temperature was 55 °C, solution pH was 9.5 and flow velocity of flue gas was 0.5 L min -1 , the CO 2 conversion efficiency (CCE) was achieved as 55.97 %. Due to the employment of nanoalloy of Ni 0 , Cu 0 and Fe 0 , the CCE was improved by about 25 % compared with that in non-catalytic conditions, and meanwhile, the KBH 4 dosage was reduced by around 45 %. Based on the catalyst properties before and after the reaction as well as the product detection, we put forward that the electrode potential differences among the ternary transition metals resulted in the improvement of catalyst surface activity to promote KBH 4 activation and the hydride transfer reaction for CO 2 . The work presented herein is conducive to the development of novel transition metal-based nanomaterials for CO 2 resource utilization in a low-energy way.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yongli He,Jiali Zhang,Hongyu Zhou,Gang Yao,Bo Lai
In this study, bimetallic particles (CuO@FeO x @Fe 0 ) were prepared by displacement plating and calcination to activate peroxymonosulfate (PMS) for the degradation of sulfamethoxazole (SMX). First, the key preparation parameters (i.e., theoretical Cu mass loading (TML Cu ) and calcination temperature) of CuO@FeO x @Fe 0 preparation were investigated by single-factor experiments. Then the properties of CuO@FeO x @Fe 0 were analyzed by scanning electron microscope energy dispersive spectrometry (SEM-EDS), energy dispersive spectrometry mapping (EDS-mapping), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Subsequently, effects of PMS dosage, CuO@FeO x @Fe 0 dosage and initial pH on the degradation of sulfamethoxazole were studied respectively. Meanwhile, the results of control experiments indicated that the initial SMX degradation efficiency of CuO@FeO x @Fe 0 system was slower, but the final degradation rate was higher than that of Fe 0 /PMS system, which was due to the sustained release effect of Fe 2+ . In addition, the quantitative experiment of SO 4 − indicated that SO 4 − generated continuously in CuO@FeO x @Fe 0 /PMS system. Furthermore, the detection results of quenching tests and electron paramagnetic resonance (EPR) revealed the generation of multiple reactive oxygen species (i.e., SO 4 − , HO , O 2 − , 1 O 2 ) in CuO@FeO x @Fe 0 /PMS system, which degraded SMX synergistically. Finally, the SMX degradation pathways were proposed based on the intermediates detected by Liquid Chromatography-Quadrupole time of flight – Mass Spectrum (LC-QTOF-MS/MS) and the activation mechanism of CuO@FeO x @Fe 0 /PMS system was analyzed in detail. This study provided a new insight on the application of CuO@FeO x @Fe 0 on organic pollutant degradation.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Yu Duan,Xiaoliang Ma,Jiangping Guo,Fangjian Shan,Yuchun Pan,Yuru Chen,Hong Chen,Gaojian Chen
The specific capture of live cells is crucial for various biomedical applications. Existing methods often are limited by complex production processes. This study introduces Fe0-mediated monomer-adaptation polymerization (Fe0-MAP), a convenient and rapid synthesis approach for selective cell capture using surface-engineered glycopolymer brushes. This method utilizes surface-initiated zerovalent iron-mediated reversible-deactivation radical polymerization (Fe0-SI-RDRP), offering advantages like simplicity, biocompatibility and oxygen-tolerance due to the use of iron sheet as catalysts. We successfully employed Fe0-MAP to selective capture both adherent (HeLa, L929) and suspended cells (Ramos, U937) in mammalian cell cultures. Combining excellent biocompatibility, specific and reusable cell capture capabilities, and applicability to suspended cells, Fe0-MAP establishes itself as a promising strategy for selective cell capture, holding significant potential for diverse biomedical applications.
研究领域:
生物医学工程
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细胞生物学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL QUALITY
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2021
·Vol. 50
·期 5
·1123-1134
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IF 2.751
Li Liu,Jinxin Zhao,Weizhao Yin,Sihao Lv,Mei Su,Ping Li,Xiangyu Zheng,Penchi Chiang,Jinhua Wu
In this study, a collaborative system of Fe 0 and mixed anaerobic microorganisms was established for remediating chromium (Cr)-contaminated soil and restraining the translocation of Cr from soil to swamp cabbage ( Ipomoea aquatica Forssk.). Solid phase characterization demonstrated that more reactive secondary minerals such as green rust, magnetite, and lepidocrocite were generated in the composite system as compared with the Fe 0 -only system. Hence, the Fe 0 –microorganisms composite system achieved a remarkably higher aqueous Cr(VI) removal of 85.6%, 2.9 times higher than that in the Fe 0 -only system. After 14 d remediation, easily available Cr(VI) and Cr total species such as water-soluble, exchangeable, and bound-to-carbonates were converted to less available Cr(III) and Cr total species (e.g., Fe–Mn oxides-bound and organic matter-bound species) because of the production of Cr–Fe hydroxides and oxides [Cr x Fe 1−x (OH) 3 or Cr x Fe 1−x OOH] on the Fe 0 surface. A pot experiment showed that Cr uptake by swamp cabbage after the composite system remediation was suppressed by 69.1%, two times higher than that after the Fe 0 -only system remediation. Excessive Fe uptake by swamp cabbage also was efficiently inhibited by the composite system treatment due to enhanced Fe hydroxides and oxides production on the Fe 0 surface because of biological corrosion and mineralization. These results indicated that Fe 0 –microorganisms composite system remediation could efficiently enhance Cr(VI) immobilization and decrease its bioavailability and bioaccumulation by plants, which is a promising technology in Cr-contaminated soil remediation.
研究领域:
环境科学
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土壤修复技术
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植物学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2018
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IF 3.927
Yuwei Pan,Minghua Zhou,Ying Zhang,Jingju Cai,Bing Li,Xuejie Sheng
An efficient heterogeneous catalyst, pre-magnetized Fe 0 (pre-Fe 0 ) could significantly activate persulfate (PS) to remove Rhodamine B (RhB). The effect of pH, Fe 0 and PS dose on the RhB removal in the pre-Fe 0 /PS and Fe 0 /PS processes were investigated, and optimized by response surface methodology (RSM) to analyze the rate constants of the RhB removal in the pre-Fe 0 /PS process and Fe 0 /PS process ( f ). High RhB removal was obtained at low pH and high dose of Fe 0 and PS in both systems. Low Fe 0 and high PS dose and large pH would result in big value of f , and the simulated maximum f of 44.3 was achieved at 2 mM Fe 0 , 16 mM PS and pH 9. The synergetic factor of pre-Fe 0 /PS (45.6) was larger than that of Fe 0 /PS (21.4). The pre-Fe 0 /PS process presented 2.1–37.5 folds enhancement than the Fe 0 /PS process for the degradation of RhB. The RhB removal in the pre-Fe 0 /PS process was 1.5–11.2 folds enhancement than that of the Fe 0 /PS process in the presence of different anions and cations. Scanning Electron Microscope (SEM) results and the larger intensity of DMPO-SO 4 − adduct signal in the Electron Paramagnetic Resonance (EPR) confirmed the primary role of sulfate radicals generated from the reaction of PS with Fe 0 in the contaminant degradation. The pre-Fe 0 /PS process exhibited advantages over other processes to remove RhB in terms of contaminant removal, working pH range and chemical dose. Therefore, the pre-Fe 0 /PS process is a cost-effective approach for degrading RhB.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Xiangyu Wang,Yiming Wang,Jun Ma,Ping Ning
The wide band gap of g-C 3 N 4 and severe aggregation of Fe 0 adequately limit their applications. To address these two critical issues, novel ternary phosphorus-doped g-C 3 N 4 /Fe 0 @expanded graphite carbon layer (P-CN/Fe 0 @EGC) photocatalyst with extremely narrow band gap and significantly enhanced catalytic activity was in-situ synthesized. P-CN/Fe 0 @EGC hybrid composite exhibited excellent photodegradation performance of tetracycline (TC) removal, which is 5.18 and 1.92 times higher than that of pristine g-C 3 N 4 and Fe 0 , respectively. Enhancement in photocatalytic activity is evaluated via photoluminescence (PL), UV–vis DRS, XRD and electron spin resonance (ESR). A reasonable catalytic mechanism of P-CN/Fe 0 @EGC is proposed. The multiply synergistic mechanisms of phosphorus-doped g-C 3 N 4 (P-CN), Fe 0 and expanded graphite carbon layer (EGC), as well as the strong reducibility of Fe 0 were accounted for the expanded visible light absorption range. The even dispersion of Fe 0 on porous and worm-like structured P-CN/EGC effectively and successfully avoided the decline in photocatalytic activity caused by aggregation of Fe 0 nanoparticles . Compared with g-C 3 N 4 , the band gap of phosphorus-doped g-C 3 N 4 was narrowed from 2.79 to 2.60 eV. It is worth noting that Fe 0 plays an important role in accelerating electron transfer speed and efficiency between P-CN and EGC. The·O 2 − and h + were the dominant active substances for TC degradation . Moreover, P-CN/Fe 0 @EGC catalyst could be used repeatedly for at least 7 cycles with high TC removal efficiency. This study may pave a new way on designing high efficient ternary hybrid photocatalyst for antibiotic degradation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yaling Wang,Maolin Wang,Qing Xie,Xiyun Cai
We report new activated persulfate systems with cyclodextrin (CD)-coated Fe 3 O 4 @Fe 0 nanoparticles (Fe 3 O 4 @Fe 0 -CD) that are characterized by both highly activating persulfates and rapidly accessing hydrophobic PAHs. Fe 3 O 4 @Fe 0 -β-CD displays chain-like structure of core–shell Fe 3 O 4 @Fe 0 nanoparticles coated with a CD layer (about 5.9 nm). CD coating stabilizes the polycrystalline structure of Fe 3 O 4 @Fe 0 nanoparticles and accelerates mass transfer of PAHs in water, thereby making Fe 3 O 4 @Fe 0 -β-CD intrinsically stable and reactive. Fe 3 O 4 @Fe 0 -β-CD/PS, featured by high yields of highly reactive Fe(IV), had about 30-fold rate constants of naphthalene (Nap) in water as much as Fe 3 O 4 @Fe 0 /PS. Fe 3 O 4 @Fe 0 -β-CD/PS completely removed Nap in water during 13 of total 18 supplementations of Nap and/or PS, whereas Fe 3 O 4 @Fe 0 /PS completely removed Nap only at the first supplementation of Nap. Likewise, Fe 3 O 4 @Fe 0 -β-CD/PS completely removed Nap in simulated groundwater, and degraded four PAHs in soils by >63%. This study may provide a technical basis for the developments of new PS activators to remove recalcitrant hydrophobic contaminants in water and soils.
研究领域:
环境科学
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2013
·
IF 3.925
Xiaoshu Lv,Guangming Jiang,Xiaoqin Xue,Donglei Wu,Tiantian Sheng,Chen Sun,Xinhua Xu
In this study, Fe 0 -Fe 3 O 4 nanocomposites embedded polyvinyl alcohol (PVA)/sodium alginate (SA) beads were synthesized, which exhibited an excellent physical properties and catalytic reactivity, and a robust performance of post-separation (complete separation using a simple grille) and reusability (efficiency of 69.8% after four runs) in Cr(VI) removal. 5.0 wt% PVA with 1.5 wt% SA was the optimal proportion for beads molding, and the followed acidification and reduction treatments were critical to ensure high mechanical strength and high Cr(VI) removal ability of beads. Effects of Fe 0 and Fe 3 O 4 mass fraction, initial pH and Cr(VI) concentration on final removal efficiency were also evaluated. Merely 0.075 wt% Fe 0 together with 0.30 wt% Fe 3 O 4 was sufficient to deal with 20 mg L −1 Cr(VI) solution. The efficiency decreased from 100 to 79.5% as initial Cr(VI) increased from 5 to 40 mg L −1 , while from 99.3 to 76.3% with increasing pH from 3.0 to 11.0. This work provides a practical and high-efficient method for heavy metal removal from water body, and simultaneously solves the problems in stabilization, separation and regeneration of Fe 0 nanoparticles.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
·
IF 6.064
Lezhu Su,Lizhou Ou,Yujiao Wen,Yifan Wang,Weilin Zhao,Zhi Zhou,Mei-e Zhong,Yongfa Zhu,Nan Zhou
Exploring catalyst materials which are advancing, recyclable and with high catalytic performances to remove persistent organic pollutants such as Quinclorac (QNC) is important. In this work, a novel N-doped carbon support CoFe 2 O 4 /Fe 0 hybrid catalyst (CFO/Fe@C) was in situ formed by a simple co-precipitation and calcination process. Fine intergrowth crystal CoFe 2 O 4 and Fe 0 were uniformly dispersed on the N-doped porous carbon that derived from the raw material Ethylene Diamine Tetraacetic Acid (EDTA), which also provided chelating effect to prevent the agglomeration of the metals. Interestingly, the Fe 0 could only be formed with the presence of cobalt, possibly due to the increased reduction property resulted from the particle refinement. The as-formed Fe 0 could not only activate the peroxymonosulfate (PMS) but also reduce the Co 3+ , resulting in a synergistic impact to remarkably enhance the degradation performance. Besides, the N-doped porous carbon can also benefit the degradation of pollutant by strengthening the electron transfer. A good degradation efficiency of QNC was obtained in CFO/Fe@C-PMS system and most of the QNC had been degraded to carbon dioxide , water and other small molecular organisms. The removal rate remained over 70% after four reuses and the material could be easily recovered from the solution due to the good magnetic properties. Therefore, the as-prepared CFO/Fe@C catalyst should be an ideal catalyst for the removal of organic pollutants .
研究领域:
环境科学
·
催化材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shengnan Chen,Jing Deng,Cheng Ye,Chengcheng Xu,Lingyi Huai,Xiao Ling,Jun Li,Xueyan Li
Pre-magnetized Fe 0 /persulfate (pre-Fe 0 /PS) process was innovatively employed for controlling the pollution of p -arsanilic acid ( p -ASA). This process showed favorable removal performance, achieving almost complete elimination of 10 mg/L p -ASA within 30 min at the reaction conditions of 0.2 g/L pre-Fe 0 and 1 mM PS. The increase of PS concentration and pre-Fe 0 dosage was conducive to the degradation. The coexistence of Cl − , NO 3 − and SO 4 2− accelerated the removal, however the presence of HCO 3 − and HA presented the opposite trend. The p -ASA degradation decelerated gradually with increasing pH from 5 to 9. Its removal was caused by the attack of reactive oxygen species (i.e., SO 4 − , OH, O 2 − ), which could be continuously formed via the Fe 2+ /Fe 3+ cycle in solution and on pre-Fe 0 surface. In pre-Fe 0 /PS system, SO 4 − in solution, surface-bound SO 4 − , OH, OH in solution, O 2 − in solution and Fe(IV) contributed to the p -ASA degradation. A plausible transformation route related to the break of C-N and As-C bonds, the substitution of OH group was put forward. More importantly, the released inorganic arsenic during p -ASA decomposition could be effectively controlled through multiple functions including the precipitation, co-precipitation and sorption, which was well confirmed by XPS, FTIR and XRD analysis. Pre-Fe 0 /PS and Fe 0 /PS pretreatments both reduced the generation of C-DBPs except for chloral hydrate, while increased the formation of N-DBPs except for trichloroacetamide.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 5
·4842-4854
·
IF 2.195
Deb Hridam,Morshed Mohammad Neaz,Xiao Shili,Azad Shamim Al,Cai Zhicheng,Ahmed Arsalan
This study introduces, a titanium dioxide (TiO 2 ) and zerovalent iron (Fe 0 ) nanoparticles immobilized electrospun poly (acrylic acid)/poly (vinyl alcohol) (PAA/PVA) nanofibrous mat for photocatalytic degradation of hazardous water pollutant. For that, PAA/PVA nanofibrous mat was prepared by electrospinning followed by crosslinking and immobilization/incorporation of TiO 2 and Fe 0 nanoparticles through Layer-by-Layer (LbL) self-assembly method. The obtained PAA/PVA–TiO 2 and PAA/PVA–TiO 2 –Fe 0 was fully characterized by scanning electron microscopy (SEM), FTIR, TGA and porosity analysis. The results showed successful immobilization of both (TiO 2 and Fe 0 ) nanoparticles on the nanofibrous mat with uniform distribution. The latter exhibited catalytic activity towards the degradation of Methyl Blue (MB) and Brilliant Green (BG) dyes separately and mixed in the presence of UV light. UV–Vis spectroscopic analysis was used to monitor and quantitative analysis of the degradation. It has been found that high photocatalytic activity of the functional nanofibrous mats has been observed. The fastest conversion rate reached to 99.2% in 20 min at a rate constant of 0.0847/min providing adequate reusability of the nanofiber mats up to four consecutive cycles. A mechanism of the photocatalytic activities has been proposed by referring to the above results. The results opened a promising prospect for using nanofibrous based effective photocatalyst for environmental application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）