Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 36
·19333-19342
·
IF 8.867
Long Kong,Zhichun Li,Xueqiong Huang,Shouqiang Huang,Hua Sun,Min Liu,Liang Li
Nanostructured metal sulfides hold great promise for adsorption and catalysis applications, but it remains challenging for them to achieve highly efficient decontamination and facile separation of heavy metal ions from water. Herein, Fe3S4/reduced graphene oxide composites (Fe3S4/rGO) were successfully prepared and utilized for the removal of Pb(II) from water. Uniform Fe3O4 nanoparticles were firstly dispersed on the rGO, and employed as sacrificial materials for a facile sulfuration approach. This gave rise to the fabrication of Fe3S4 nanoparticles (Fe3S4 NPs) with an average size of 14.3 nm. The resultant Fe3S4/rGO presented an evidently greater adsorption capacity (285.71 mg g−1) and advantages in driving fast adsorption of Pb(II) in comparison with Fe3O4/rGO (106.27 mg g−1). A remarkable selectivity for Pb(II) was achieved in the presence of coexisting cations and anions, and the addition of humic acid promoted the removal of Pb(II) by Fe3S4/rGO. The enhanced performance of Fe3S4/rGO was mostly facilitated by synergetic contributions of the strong and selective Pb–S interactions between Pb(II) and small Fe3S4 NPs associated with the surface adsorption. Remarkably, a single treatment of smelting wastewater with Fe3S4/rGO effectively reduced Pb(II) concentration below the drinking water standard that is recommended by the U.S. Environmental Protection Agency, along with a surprisingly high removal efficiency toward arsenic (96.18%). However, Fe3O4/rGO merely exhibited a low removal rate of 29.59% for Pb(II). The efficient removal performance of Fe3S4/rGO exhibited its great potential in the remediation of heavy metal polluted water via simultaneously taking advantage of magnetic properties and a high affinity for heavy metals.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jun Li,Qi Liu,Ge Gou,Shurui Kang,Xiao Tan,Bo Tan,Longguo Li,Naiwen Li,Chao Liu,Bo Lai
Sulfamethoxazole (SMX) degradation was investigated through peroxymonosulfate (PMS) activation by the synthesized flower-like Fe 3 S 4 , which showed the best performance with the highest reaction stoichiometric efficiency (7.9%). 99% of SMX (2 mg/L) was eliminated from reaction solution during 30 min with 20 mg/L Fe 3 S 4 and 0.1 mM PMS. The main reactive oxygen species (ROS) involved in the contaminant decomposition were investigated through quenching experiments, electron paramagnetic resonance, and X-ray photoelectron spectroscopy characterization. In addition to the typical sulfate radical (SO 4 •- ) and hydroxyl radical (HO • ), it should be noted that non-radical singlet oxygen ( 1 O 2 ) was generated and participated in the catalytic oxidation of compounds. The degradation of SMX in the PMS alone system through non-radical pathway and in the Fe 3 S 4 /PMS system by both radical and non-radical pathways were proposed according to the detected intermediates. The ecotoxicity of SMX and its by-products were evaluated through the quantitative structure–activity relationship (QSAR) analysis. The present study provided new insight into the mechanism of organic compound removal by ROS including radical and non-radical in Fe 3 S 4 /PMS system.
研究领域:
环境科学
·
化学工程
·
污染控制
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bing Zhang,Bo Wang,Heli Tang,Qingjie Li,Wenxin Shi
In this study, an innovative ferric tetrasulfide/peroxymonosulfate (Fe 3 S 4 /PMS) pre-oxidation system was integrated into an aerobic granular membrane bioreactor (AGMBR) to alleviate membrane fouling. The role and underlying mechanisms associated with solution pH was also investigated. The results demonstrated that under optimal conditions (pH 6.0, 0.2 g/L Fe 3 S 4 , and 2.0 mM PMS), pre-oxidation treatment significantly reduced the total membrane fouling resistance by 98 % and shifted the fouling mechanism from cake layer fouling to pore blocking fouling. Moreover, pre-oxidation treatment at pH 6.0 enhanced the energy barrier between foulants-membrane and foulants-foulants, thereby alleviating membrane fouling. The key reactive oxygen species were identified as •OH, SO 4 • – , and 1 O 2 with contributions of 7.03 %, 46.62 %, and 22.38 %, respectively. Furthermore, phosphates significantly inhibited the performance of Fe 3 S 4 /PMS oxidation system for mitigating membrane fouling; however, decreasing solution pH alleviated this inhibition effect. Additionally, an inhibiting effect on coating metal oxide or hydroxide on catalyst surface was observed along with variation in surface charge properties of Fe 3 S 4 when pH was decreased to 6.0, which further promoted activation of PMS for mitigating membrane fouling. This study provides a robust theoretical foundation for employing Fe 3 S 4 /PMS pre-oxidation in AGMBR to alleviate membrane fouling issues which represents an important engineering advancement.
研究领域:
环境工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jingyi Xu,Xianjun Tan,Wenhui Ding,Arturo A. Keller,Yuxiong Huang
To overcome the obstacles of adding oxidants for the decontamination of antibiotics in natural aqueous environment, an external oxidant-free system was developed to in-situ generate reactive oxygen species (ROS) through the activation of dissolved oxygen molecules (O 2 ). Guided by density functional theory (DFT) calculation, cobalt-doped Fe 3 S 4 (Co-Fe 3 S 4 ) nanoflowers were designed and synthesized, which exhibited superior O 2 adsorption and activation ability. Co-Fe 3 S 4 triggered a long-lasting generation of •OH with a high yield of 16.63 μM •OH, which was 3 times higher than that of Fe 3 S 4 . Furthermore, use of Co-Fe 3 S 4 resulted in a 7.33-fold improvement in sulfamethoxazole’s degradation rate and boosted the degradation efficiency from 43% to over 90% in the long-run experiments compared to Fe 3 S 4 . With 18 O 2 isotopic investigations, we quantitatively revealed that •OH was generated via O 2 ′s one-step dissociative adsorption process and the directional electron transfer contributed by structural S(-II). Without the addition of external oxidants (e.g., H 2 O 2 , O 3 ), we have reported an efficient one-step activation of O 2 to generate ROS for effective degradation of antibiotics. Hence, we have provided a new strategy for the control of emerging organics in natural water systems, as well as shed light on the mechanisms of in-situ •OH generation.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jiren Yuan,Hu Zhou,Dan Li,Feigao Xu
To perfect the photocatalytic performance of Fe 3 S 4 under visible light irradiation using tetracycline hydrochloride (TCH) as a target contaminant, magnetic Fe 3 S 4 /g-C 3 N 4 composites with a visible light response were synthesized by a one-step hydrothermal method . The effects of varying quality ratios, temperatures, pH value, and H 2 O 2 concentrations on photocatalysis was investigated, and the composites were characterized by XRD , FTIR, XPS, SEM, etc. The results show that the highest photo-Fenton catalytic efficiency is obtained for a composite with a Fe 3 S 4 to g-C 3 N 4 quality ratio of is 1:0.75 (Fe 1 C 0.75 ). More than 97.5% of TCH is removed by Fe 3 S 4 /g-C 3 N 4 /H 2 O 2 within 60 min under visible light irradiation and near-neutral conditions (pH 6.2), and its first-order kinetic constant is determined to be 0.06802 min −1 . The removal efficiency for Fe 3 S 4 /g-C 3 N 4 is 1.61 and 13.34 times higher than that of the parent Fe 3 S 4 and g-C 3 N 4 , respectively. At this time, g-C 3 N 4 can effectively increase the leaching of S 0 . The effects of different active species in the TCH degradation experiment with the Fe 1 C 0.75 composite were studied, and it is found that h + , · O 2 − , and ·OH radicals are the main substances involved in the degradation of TCH. The synthesized Fe 3 S 4 /g-C 3 N 4 catalyst is a promising heterogeneous photo-Fenton catalyst for the removal of organic pollutants.
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
WATER RESEARCH
·
2022
·
IF 13.4
Xiwen Liu,Penghui Shao,Shanshan Gao,Zhaoyu Bai,Jiayu Tian
Benzoquinone (BQ) is of great significance for enhancement of contaminants degradation in the homogeneous oxidation system of peroxymonosulfate (PMS). However, the role of BQ in the heterogeneous activation of PMS for contaminants oxidation is still not clear. Herein, this work reported that the addition of BQ into the Fe 3 S 4 /PMS system could effectively enhance the degradation and mineralization of bisphenol A (BPA). Mechanistic study uncovered that the BQ and PMS would form active complexes (BQ-PMS*) on the surface of Fe 3 S 4 and the excited BQ-PMS* can oxidize the BPA. To be specific, the electron of BPA was extracted by BQ-PMS* and then transfer to the surface of Fe 3 S 4 . The surface electron can induce the change of valence state of S and Fe elements, which can trigger the degradation of BPA and inhibit the decomposition of BQ itself. To the best of our knowledge, it is the first time to unveil the positive role of BQ in the heterogeneous activation of PMS, which may shed new light on the establishment of high-efficient PMS-based oxidation technology for remediation of organic pollutant.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Hui Li,Siyang Li,Lide Jin,Zhen Lu,Minghui Xiang,Chen Wang,Wenbing Wang,Jin Zhang,Chunyang Li,Haijiao Xie
The synergistic catalytic degradation of metal carbon-based composites is a feasible strategy to improve the efficiency of advanced oxidation processes (AOPs) by means of green chemistry. In this work, Fe 3 S 4 nanoparticles were anchored on the surface of peanut shell biochar to prepare magnetic Fe 3 S 4 /biochar (Fe 3 S 4 /BC) composites, which were applied to activate peroxymonosulfate (PMS) to degrade 2,4,6-trichlorophenol (2,4,6-TCP). The addition of biochar not only reduced the aggregation of Fe 3 S 4 nanoparticles, but also accelerated the electron transfer rate, and the constructed C-O-Fe bridges accelerated the regeneration of Fe(Ⅱ), which made Fe 3 S 4 /BC have better catalytic performance than pure Fe 3 S 4 even though the use of metal sulfides was reduced. Fe on the surface of Fe 3 S 4 /BC was the catalytic reaction center. The dominant role of sulfate radical (SO 4 ·- ) and hydroxyl radical (HO·) on the degradation of 2,4,6-TCP was verified by electron paramagnetic resonance (EPR) and free radical quenching experiments. The mechanism of C-O-Fe bridges was verified by density functional theory (DFT) calculation. The mechanism of PMS activation by Fe 3 S 4 /BC was elucidated by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). Based on the detection results of intermediate products, the possible degradation pathways to 2,4,6-TCP were proposed. This work provides new insights into the synergistic catalytic mechanism of metal carbon-based sulfides and promotes the development of environmentally friendly and efficient metal carbon-based catalysts.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Hu Zhou,Shuai Wang,Jinyue Jiang,Li Shao,Dan Li,Jiren Yuan,Feigao Xu
Magnetic Fe 3 S 4 /MoS 2 composites with a visible light response were prepared, and their degradation activity was tested using tetracycline hydrochloride (TCH) as a simulated pollutant. The mass ratios of Fe 3 S 4 and MoS 2 , pH change, temperature, H 2 O 2 concentration, and catalyst addition were investigated to determine the mechanism of TCH degradation. The results show that the removal rate of TCH by the Fe 3 S 4 /MoS 2 composites is much higher than that of the pure Fe 3 S 4 or MoS 2 under pH values ranging from 1.2 to 13.2. The removal rate of TCH by Fe 3 S 4 /MoS 2 was 376.37 and 5.45 times higher than that of pure Fe 3 S 4 and MoS 2 when the mass ratio of Fe 3 S 4 and MoS 2 was 1:1 at pH 7.2. The main free radicals and metal leaching changes are analyzed. The removal mechanism of TCH was proposed by the free radical scavenger test and the metal leaching test. The mechanism proposed in this paper shows that the high catalytic activity of Fe 3 S 4 /MoS 2 composite is due to the acidic microenvironment near the surface of the composite, which reduces the production of ferric hydroxide sludge.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 37
·17902-17911
·
IF 7.233
Guoqiang Guan,Xin Wang,Bo Li,Wenlong Zhang,Zhe Cui,Xinwu Lu,Rujia Zou,Junqing Hu
To retain the agents in tumors for cancer diagnosis and therapy, and then to remove them from the body, are key for the clinical applications of ideal inorganic theranostic agents. To meet these needs, we have developed a transformed theranostic platform, employing PVP coated Fe3S4 tetragonal nanosheets (TNSs), which could effectively accumulate in the tumor under magnetic targeting, whilst gradually transforming to small particles (∼5 nm) over three weeks. These were then effectively excreted from the body in normal physiological conditions after exerting their therapeutic effect. The aqueous dispersion of PVP coated Fe3S4 TNSs had an intense near-infrared absorption, excellent photothermal conversion efficiency (64.3%) and great T2 weighted magnetic resonance imaging properties (71.3 mM−1 S−1). In addition, Fe3S4 TNSs could realize a synergistic photothermal therapy (PTT)/chemodynamic therapy (CDT), because the localized heat produced by PTT from the defect-rich structure could enhance the Fenton process by utilizing the overproduced H2O2 in the tumor microenvironment, and in return, the produced ˙OH could inhibit tumor growth and recurrence after PPT. We thus developed a high-efficiency inorganic theranostic platform which was effectively cleared from the body. This will open up a new avenue for the design of inorganic agents for clinical applications in the future.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·230
·
IF 4
Zhao Wang,Jawad Ali,Ajmal Shahzad,Yanan Chen,Haiqing Ma,Qiao Huang,Lei Xie,Futang Xing
Fe-based heterogeneous catalytic advanced oxidation processes show great potential for treating wastewater. However, catalyst instability often hinders their practical use, mainly due to the slow regeneration of Fe2+sites. Herein, we developed a Fe3S4/WO3catalyst, where the electron-rich Wx and Sx sites promoted efficient electron transfer, enabling continuous regeneration of Fe2+active sites on the catalyst surface. The Fe3S4/WO3catalyst exhibited outstanding degradation efficiency for tetracycline (TC) in the peroxymonosulfate (PMS) system, achieving a 92.5% removal efficiency, significantly higher than its individual components of Fe3S4(52.8%), WO3(43.1%), and WS2(53.2%). Moreover, the Fe3S4/WO3/PMS system demonstrated a broad operational pH range (3.0–9.0), excellent degradation efficiency for various emerging pollutants, minimal interference from background electrolytes and organic matter, and strong stability in real water treatment. Chemical scavenger tests and electron paramagnetic resonance (EPR) analysis confirmed that the oxidative degradation of TC was driven by multiple reactive species, including SO4•−,•OH,•O2−, and1O2. This study provides a novel strategy for regulating active sites in Fe-based catalysts to ensure sustained performance, offering a pathway for the rational design of next-generation Fenton-like catalysts for efficient and sustainable micropollutant removal from wastewater.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yu-Jiao Zhang,Jin Qu,Shu-Meng Hao,Wei Chang,Qiu-Yu Ji,Zhong-Zhen Yu
Increasing demands for lithium-ion batteries (LIBs) with high energy density and high power density require highly reversible electrochemical reactions to enhance the cyclability and capacities of electrodes. As the reversible formation/decomposition of the solid electrolyte interface (SEI) film during the lithiation/delithiation process of Fe3S4 could bring about a higher capacity than its theoretical value, in the present work, synthesized Fe3S4 nanoparticles are sandwich-wrapped with reduced graphene oxide (RGO) to fabricate highly reversible and long cycling life anode materials for high-performance LIBs. The micron-sized long slit between sandwiched RGO sheets effectively prevents the aggregation of intermediate phases during the discharge/charge process and thus increases cycling capacity because of the reversible formation/decomposition of the SEI film driven by Fe nanoparticles. Furthermore, the RGO sheets interconnect with each other by a face-to-face mode to construct a more efficiently conductive network, and the maximum interfacial oxygen bridge bonds benefit the fast electron hopping from RGO to Fe3S4, improving the depth of the electrochemical reactions and facilitating the highly reversible lithiation/delithiation of Fe3S4. Thus, the resultant Fe3S4/RGO hybrid shows a highly reversible charge capacity of 1324 mA h g–1 over 275 cycles at a current density of 100 mA g–1, even retains 480 mA h g–1 over 500 cycles at 1000 mA g–1, which are much higher than reported values.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-12
·
IF 5.3
Zhou Peipei,Hong Yangluchen,Fan Ru,Wang Huili,Wang Xuedong,Mei He
To realize the reutilization of waste Myrica rubra in the analytical field, we synthesized Myrica rubra –based N-doped carbon dots (MN-CDs) and further anchored them onto the surface of Fe 3 S 4 to fabricate Fe 3 S 4 @MN-CD nanocomposites. The as-fabricated nanocomposites possessed higher peroxidase-mimetic activity than its two precursors, resulting from the synergistic effect between them, and could catalyze colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into deep blue oxTMB with a strong 652-nm absorption. Under optimized conditions (initial solution pH, 3.5; incubation temperature, 35 ℃; Fe 3 S 4 @MN-CD concentration, 50 µg mL −1 , and 652-nm absorption), Fe 3 S 4 @MN-CDs were employed for colorimetric assay of p -aminophenol ( p -AP) with wide linear range (LR, 2.9–100 µM), low detection limit (LOD, 0.87 µM), and satisfactory recoveries (86.3–105%) in environmental waters. Encouragingly, this colorimetric assay provided the relative accuracy of 97.0–99.4% as compared with conventional HPLC-UV detection. A portable smartphone-based colorimetric application was developed by combining the Fe 3 S 4 @MN-CD-based visually chromogenic reaction with a “Thing Identify” APP software. Besides, we engineered an image-capturing device feasible for field use, in which the internal-compact sealing prevented external light source from entering photography chamber, thereby reducing light interference, and also the bottom light source enhanced the intensity of blue imaging. This colorimetric platform exhibited satisfactory LR (1–500 µM), low LOD (0.3 µM), and fortification recoveries (86.6–99.6%). In the chromogenic reaction catalyzed by Fe 3 S 4 @MN-CDs, ·O 2 − played a key role in concomitant with the participation of •OH and h + . Both the colorimetric assay and smartphone-based intelligent sensing show great promising in on-site monitoring of p -AP under field conditions. Graphical Abstract
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）