Frontiers of Environmental Science & Engineering
·
2023
·Vol. 18
·期 2
·1-11
·
IF 6.4
Liu Yiwei,Gu Kaili,Zhang Jinhua,Li Jinxiang,Qian Jieshu,Shen Jinyou,Guan Xiaohong
Sulfated zero-valent iron (SZVI) has shown promising applications in wastewater treatment. However, the rapid decline in the reactivity of SZVI with time limits its real practice. To mediate this problem, partial aging was proposed to improve the reactive durability of SZVI. Taking Cr(VI) as the target contaminant, we found that the aged ZVI (AZVI) gradually lost reactivity as aging time increased from 0.5 to 2 d. Counter-intuitively, the partially aged SZVI (ASZVI) showed greater reactivity than SZVI when exposed to oxygenated water for a period ranging from 0.5 to 14 d. In addition, the ASZVI with 0.5 d of aging time (ASZVI-0.5) not only maintained reactivity in successive runs but also increased the Cr(VI) removal capacity from 9.1 mg/g by SZVI to 19.1 mg/g by ASZVI-0.5. Correlation analysis further revealed that the electron transfer from the Fe 0 core to the shell was mediated by the conductive FeS and FeS 2 in the subshell of ASZVI. Meanwhile, the lepidocrocite and magnetite on the surface of ASZVI facilitated Cr(VI) adsorption and subsequent electron transfer for Cr(VI) reduction. Moreover, the iron (hydr)oxide shell could retain the conductive FeS and FeS 2 in the subshell, allowing ASZVI to reduce Cr(VI) efficiently and sustainably. In general, partial aging can enhance the reactive durability of ZVI when coupled with sulfidation and this synergistic effect will be beneficial to the application of SZVI-based technology for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 16
·7155-7161
·
IF 9.931
Mingbao Huang,Anding Xu,Huanhuan Duan,Songping Wu
To meet heavy-duty applications for LIBs, development of superior electrode materials with high-efficiency lithium-storage capability has become very crucial and urgent. Herein, a simple one-pot method has been developed for the synthesis of a reduced graphene oxide-wrapped FeS nanoflake (FeS@rGO) composite using oleylamine as a solvent, reductant, and surfactant. The as-prepared FeS@rGO composite as an anode material for LIBs showed excellent cycling ability and rate performance, i.e., reversible capacities of 887 mA h g−1 at the current density of 200 mA g−1 after 150 cycles, 662 mA h g−1 at 1.0 A g−1 after 200 cycles, and 325 mA h g−1 at 5.0 A g−1 even after 1000 cycles. These enhanced electrochemical performances can be attributed to the unique cladding structure, in which rGO can act as a protective coating to accommodate volume changes of FeS upon Li-cycling and offer a fast electron transfer channel. A two-dimensional sheet structure also facilitates Li+ ion diffusion in active electrode materials. More importantly, the enhanced extrinsic pseudocapacitance can promote the charge transfer rate and afford significant Li-storage capacity, thereby promoting the rate capability of a material at large current densities. Therefore, as a promising anode with high power density and long lifespan, this composite has shown its distinct potential and advantage for heavy-duty LIBs.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
先进电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Wenchao Chen,Xin Liu,Jianghai Wu,Qing Wang,Yahui Zhang,Shengxue Yan,Pengqing Hou,Shaohua Luo
Iron sulfide is a potential anode material for sodium-ion batteries because of its abundant natural resources and high theoretical specific capacity. However, they show poor cycling performance due to the serious volume change of iron sulfide materials during the process of charge and discharge. In this work, Fe 1-x S particles are encapsulated in nitrogen-doped 1D carbon fiber material by an electrospinning/high-temperature vulcanization process. The carbon fiber skeleton effectively stabilized the structure of the material; The heteroelement doped carbon improved the electrical conductivity properties and capacitive sodium storage performance. Owing to the unique structure of nitrogen-doped 1D carbon fiber, the material obtains good cycling stability and rate capability. The optimized Fe 1-x S@ nitrogen-doped carbon fibers (Fe 1-x S@NCFs) material was used as the anode of the sodium-ion batteries and maintained a discharge capacity of 382 mAh g -1 after 100 cycles at 0.1 A g -1 and 330 mAh g -1 after 150 cycles at 1 A g -1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Meng Shao,Yuanyuan Cheng,Tao Zhang,Sheng Li,Weina Zhang,Bing Zheng,Jiansheng Wu,Wei-Wei Xiong,Fengwei Huo,Jun Lu
Sodium-ion batteries suffer the disadvantages of poor rate performance and cycling stability due to its sluggish sodiation kinetics. A rational design strategy for both materials compositions and structures has been proposed to meet these challenges. Herein, a triple-component composite derived from metal–organic frameworks, comprising FeS2, nitrogen–sulfur co-doped porous carbon, and reduced graphene oxide (FeS2@NSC/G), has been successfully synthesized. With the capacities contributions from different sodium storage routes (diffusion-controlled processes and surface capacitive processes) at varies rate conditions, it is aiming to make full use of each component in the electrode composite and their unique porous structures. Expected electrode properties have been achieved and related electrochemical behaviors have also been investigated. The strategy would present a promising thought for composites design, which could enhance high-rate electrochemical energy storage performances.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Guoxu Ni,Runye Hu,Qikai Wang,Wenwen Shi,Qiuhong Cui,Jun Yan
HF-free synthesis of FeSe₂@S-Ti₂C via Lewis acidic molten-salt etching. • Simultaneous Ti₂C termination, etching, and FeSe₂ anchoring in one step. • Strong interfacial coupling endows Ti₂C/FeSe₂ with metallic conductivity. • Ti₂C/FeSe₂ delivers high capacity, long life, and high rate for SIBs. • Synergistic Na-storage mechanism of FeSe₂@S-Ti₂C revealed by DFT and in situ EIS/DRT analyses. The development of high-performance anode materials is critical for advancing sodium-ion batteries (SIBs) toward practical applications. Herein, we report a novel FeSe 2 @S-Ti 2 C heterostructure synthesized via a safe and straightforward Lewis acidic molten salt etching strategy followed by in-situ selenization. This approach enables simultaneous etching of Ti 2 AlC MAX phase, surface termination with sulfur-containing groups, and uniform anchoring of FeSe 2 nanoparticles within the Ti 2 C MXene matrix, eliminating the need for hazardous HF or post-synthesis metal removal. The resulting heterostructure integrates multiple advantageous features: The highly conductive Ti₂C MXene framework accelerates the transport of Na + , while its structural robustness effectively accommodates the volume expansion caused by Na + deintercalation. S-containing surface terminations provide additional active sites that enhance Na + adsorption. Ultimately, the FeSe₂@S-Ti₂C anode demonstrates exceptional sodium-storage performance, characterized by a high reversible capacity of 397.6 mAh g −1 after 350 cycles at 1 A g −1 , superior rate capability (227.8 mAh g −1 at 5 A g −1 ), as well as robust full-cell performance with an initial Coulombic efficiency of 91.2% and a reversible capacity of 493.6 mAh g −1 following 500 cycles at 1 A g −1 . Density functional theory calculations further elucidate the underlying mechanism, revealing metallic conductivity, reduced Na + diffusion barrier (0.30 eV), and enhanced Na adsorption energy (−2.43 eV) in the heterostructure. This work presents a versatile and scalable strategy for constructing advanced MXene-based heterostructures, offering promising avenues for high-performance SIB anodes. Description : Lewis acidic molten salt etching enables one-pot synthesis of FeSe₂@S–Ti₂C heterostructures; the conductive MXene framework with S-terminations and interfacial coupling deliver fast Na + diffusion and robust sodium storage. Download: Download high-res image (203KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sensors
·
2026
·Vol. 11
·期 7
·5928-5941
·
IF 10.9
Zhao Jiaqi,Pan Xiaosen,Li Nanpei,Wang Yutian,Sun Yuyang,Wang Xiaojuan,Liu Ruiming,Gao Meng,Liu Boyue,Ma Ning,Fang Yunsheng,Li Jie
Positive airway pressure therapy serves as a core therapeutic strategy for sleep-disordered breathing, with its efficacy generally evaluated via sleep breathing assessment. Nevertheless, the prevailing flow and pressure-based methods remain insufficient in both accuracy and interference resistance. Here, we propose an intelligent ventilation mask system based on the impedance humidity-sensing mechanism for long-term continuous and accurate respiratory pattern monitoring and evaluation. The integrated sensor is based on Ti 3 C 2 T x MXenes modified with dopamine-functionalized polyethyleneimine, which forms a wrinkled surface that increases the active area for water adsorption and provides a passivation effect to inhibit oxidation-induced performance degradation in humid atmospheres. The fabricated sensor exhibits high sensitivity (average of 2.29 × 10 4 Ω/%RH) and low humidity hysteresis (<0.83%). Even after extreme temperatures (100 ° C/–20 ° C) and 90-day exposure, it can maintain consistent performance. Integrated with a machine learning algorithm, the system identifies 11 respiratory patterns (5 normal and 6 abnormal) with 99.74% accuracy under ventilatory airflow and analyzes 8-hour continuous nighttime sleep data via customized software. This lays the groundwork for improving the long-term management of sleep-disordered breathing in both clinical and home settings.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2026
·
IF 2.6
Zang Xueke,Tu Yuedong,Lyu Shuguang,Xu Zhiqiang
View large Download slide View large Download slide Close modal This study investigates the synergistic activation of persulfate (PS) by multivalent iron-based materials (ZVI, FeS, and FeS 2 ) in the presence of activated carbon (AC) for the efficient degradation of trichloroethylene (TCE). The incorporation of AC markedly accelerated TCE oxidation by enriching contaminants within its microenvironment and promoting reactive species (ROS) generation. The optimal PS/iron/TCE molar ratios with 0.5 g L −1 AC were 20/10/3 for the PS/ZVI/TCE system and 20/60/3 for both PS/FeS/TCE and PS/FeS2/TCE systems. Scavenging and electron paramagnetic resonance (EPR) analyses identified hydroxyl radicals (HO • ), sulfate radicals ( S O 4 − ∙ ), and singlet oxygen ( 1 O 2 ) as the dominant ROS responsible for TCE degradation. All three systems maintained over 90% removal efficiency across a wide pH range (3–9). Anion interference tests revealed that bicarbonate ( HC O 3 − ) strongly inhibited ROS formation, while other anions had minor effects. Experiments using actual groundwater confirmed the robustness of the AC-iron systems, which achieved efficient degradation of chlorinated alkenes, while exhibiting limited activity toward saturated chlorinated alkanes. Overall, this research highlights the synergistic role of AC and iron-based materials in PS activation and provides valuable insights into selective CHC degradation in a complex groundwater environment. Multivalent iron materials coupled with AC synergistically enhanced persulfate activation and TCE degradation. Over 90% of TCE degradation across a broad pH range was achieved at the optimized chemical dosages. HO • , 1 O 2 , and S O 4 − ∙ were the primary reactive species responsible for TCE degradation. This technique demonstrated strong potential for remediating CHCs, particularly chlorinated alkenes, in real groundwater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED GEOCHEMISTRY
·
2026
·
IF 3.5
Chundan Gan,Chunlai Hong,Jin-yan Yang
Vanadium (V)-bearing tailings can act as long-term sources of mobile V, yet the roles of tailings-associated minerals and residual beneficiation reagents in regulating V (im)mobilization remain unclear. Here, binary reactions between dissolved V(V) and representative minerals of V–Ti magnetite tailings, alongside tailings suspensions amended with oxalic acid or carboxymethyl cellulose (CMC), were used to isolate mineral- and reagent-specific controls on V transformation. Poorly crystalline Fe oxides, particularly ferrihydrite and lepidocrocite, showed the strongest V immobilization, decreasing dissolved total V from 25.5 mg/L to 6.16–10.5 and 6.21–8.41 mg/L, respectively. FTIR evidence for Fe–O–V surface complexation on ferrihydrite, together with limited structural changes in crystalline Fe and Fe–Ti phases, indicated that reactive surface sites rather than bulk mineral transformation dominated V immobilization. Birnessite retained V under oxidizing conditions while maintaining the aqueous V pool as V(V), whereas FeS induced reducing conditions and promoted the formation of dissolved non-V(V) species. In whole-tailings systems, oxalic acid mobilized V from the tailings, yielding 26.4 mg/L dissolved total V, and facilitated Fe(III)-to-Fe(II) transformation, with Fe(II) accounting for 95.0% of dissolved Fe by day 30 of incubation. However, XRD and FTIR showed no detectable transformation of the bulk tailings assemblage, indicating selective dissolution and redox transformation of reactive minor or poorly crystalline phases. In contrast, CMC had limited effects on V release. These findings show that reactive minor phases and residual oxalate can strongly influence V (im)mobilization, highlighting the need to incorporate reagent residues and Fe/S redox processes into risk assessments of V–Ti magnetite tailings.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Hongjie Chen,Junlin Chen,Yang Liu,Bingrui Li,Haofei Li,Xing Zhang,Chuhan Lv,Hua Dong
NH3 gas in human exhaled breath contains abundant physiological information related to human health, especially chronic kidney disease (CKD). Unfortunately, up to now, most wearable NH3 sensors show inevitable defects (low sensitivity, easy to be interfered by the environment, etc.), which may lead to misdiagnosis of CKD. To solve the above dilemma, a nanoporous, heterogeneous, and dual-signal (optical and electrical) wearable NH3 sensor mask is developed successfully. More specifically, a polyacrylonitrile/bromocresol green (PAN/BCG) nanofiber film as a visual NH3 sensor and a polyacrylonitrile/polyaniline/reduced graphene oxide (PAN/PANI/rGO) nanofiber film as a resistive NH3 sensor are constructed. Due to the high specific surface area and abundant NH3 binding sites of these two nanofiber films, they exhibit good NH3 sensing performance. However, although the visual NH3 sensor (PAN/BCG nanofiber film) is simple without the need of any detecting facilities and quite stable when temperature and humidity change, it shows poor sensitivity and resolution. In comparison, the resistive NH3 sensor (PAN/PANI/rGO nanofiber film) is of high sensitivity, fast response, and good resolution, but its electrical signal is easily interfered by the external environment (such as humidity, temperature, etc.). Considering that the sensing principles between a visual NH3 sensor and resistive NH3 sensor are significantly different, a wearable dual-signal NH3 sensor containing both a visual NH3 sensor and resistive NH3 sensor is further explored. Our data prove that the two sensing signals in this dual-signal NH3 sensor mask can not only work well without interference with each other but also complement each other to improve the sensing accuracy, indicating its potential application in non-invasive diagnosis of CKD.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 12
·1827
·
IF 5.3
Huaide Jiang,Xiaoli He,Ming Yang,Chengzhi Hu
Light-driven electrophoretic micromotors have gained significant attention recently for applications in drug delivery, targeted therapy, biosensing, and environmental remediation. Micromotors that possess good biocompatibility and the ability to adapt to complex external environments are particularly attractive. In this study, we have fabricated visible light-driven micromotors that could swim in an environment with relatively high salinity. To achieve this, we first tuned the energy bandgap of rutile TiO2that was hydrothermally synthesized, enabling it to generate photogenerated electron-hole pairs under visible light rather than solely under UV. Next, platinum nanoparticles and polyaniline were decorated onto the surface of TiO2microspheres to facilitate the micromotors swimming in ion-rich environments. Our micromotors exhibited electrophoretic swimming in NaCl solutions with concentrations as high as 0.1 M, achieving a velocity of 0.47 μm/s without the need for additional chemical fuels. The micromotors’ propulsion was generated solely by splitting water under visible light illumination, therefore offering several advantages over traditional micromotors, such as biocompatibility and the ability to operate in environments with high ionic strength. These results demonstrated high biocompatibility of photophoretic micromotors and high potential for practical applications in various fields.Keywords:micromotors;visible light;ion-tolerant;biocompatibility
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Peng Wang,Yihong Ding,Ying Chu,Xinxin Zhu,Jie Lin,Lixiong Shao,Tianbiao Zeng
FeSb2S4 is considered a potential anode material of sodium-ion batteries (SIBs) due to the high theoretical capacity (877 mAh g–1) and fast Na+ diffusion kinetics. Synthesis of the FeSb2S4-based anode via a simple strategy is essential for practical applications. In this study, nano FeSb2S4 anchored on exfoliated graphite (FeSb2S4-G) was fabricated via a two-step strategy: heat treatment of commercial FeS+Sb2S3 powder and then ball-milling with commercial graphite. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that the pulverized nano FeSb2S4 and exfoliated graphite establish the chemical bonds, which is very advantageous to boost the charge/discharge reversibility. As-prepared FeSb2S4-G delivered 577 mAh g–1 in the second cycle under 100 mA g–1 and kept 385 mAh g–1 in the 70th cycle; the cycling stability surpassed bulk FeSb2S4 (662 mAh g–1 in the 2nd cycle, 109 mAh g–1 in the 70th cycle). Considering only two steps of the synthesis processes, this work presents a viable strategy for fabricating high-performance FeSb2S4-based SIB anode materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Huaxiao Xie,Pan Deng,Zhentao Zhou,Heng Xiong,Xiumin Chen,Bin Yang,Baoqiang Xu,Huan Yang,Chaosong Meng,Xiaohui Wei
An important way to obtain PbS and FeS is the thermal decomposition of Jamesonite. However, the mechanism of PbS–FeS interaction is unknown. In order to explore the separation effect of PbS and FeS, thermodynamic calculation, dynamic simulation and vacuum distillation experiments were used to explore the interaction mechanism of PbS and FeS. The decomposition and volatilization temperatures of PbS and FeS were obtained by thermodynamic calculation. The difference of saturated vapor pressure indicates that there is a tendency of separation between them. The ab initio molecular dynamics method was used to calculate the density of states of PbS and FeS at different temperatures, indicating that the FeS(114) structure is more stable than the PbS(200) structure, and the Pb–S bond is easier to break than the Fe–S bond at the same temperature. The experimental results of vacuum distillation show that the volatilization temperature of PbS is much lower than that of FeS, and FeS can only volatilize into the gas phase at a higher temperature. The theoretical calculation method is consistent with the experimental results, which shows that the thermodynamic calculation and dynamic simulation methods are reliable in predicting the volatilization and separation of crystal structures. The interaction mechanism between PbS and FeS was explored from the theoretical point of view to provide theoretical guidance for vacuum distillation experiment.
✓ 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）