CHEMOSPHERE
·
2022
·
IF 8.943
Pengfei Gan,Yichun Sun,Yunyi Li,Wen Liu,Jiangyu Ye,Meiping Tong,Jialiang Liang
In this work, the different selectivity of SO 4 •- and • OH towards municipal solid waste incineration leachates (MSWILs) was studied by a comparative study of UV/persulfate (PS) and UV/H 2 O 2 . Results showed SO 4 •- preferentially mineralized carbon atoms of higher average oxidation state, while • OH showed a two-stage mechanism of partial oxidation and mineralization successively. Electron spin resonance (ESR) analysis showed SO 4 •- had superior selectivity towards MSWILs than • OH, and Fe(II) would significantly affect the selectivity via forming Fe-MSWILs complex. As the consequence, Fe(II) showed slightly negative effect on UV/PS, but greatly enhanced the performance of UV/H 2 O 2 /Fe(II). High concentration of Cl - affected the degradation of non-fluorescent substances by UV/PS, while SO 4 2 - and NO 3 - showed no effect. In contrast, anions showed no effect on UV/H 2 O 2 . In addition, • OH preferentially attacked large molecules, but SO 4 •- showed no selectivity. This study further revealed the selectivity of SO 4 •- and • OH in the treatment of hypersaline wastewater, and provided theoretical support for the development of targeted technology .
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
·
2023
·
IF 7.7
Shuang Liu,Hong Wu,Huaili Zheng,Weizhen Zhang,Wei Ding,Hong Li,Chao Liu
Sulfite (S(IV))-based advanced oxidation process has attracted widespread attention due to the generation of strongly oxidizing sulfate radicals (SO 4 •− ) and hydroxyl radicals (HO • ) for contaminants remediation. However, the contaminant degradation by singlet oxygen ( 1 O 2 ) through a nonradical pathway was still unclear in the S(IV) activation system. Herein, a magnetic Fe 3 O 4 /g-C 3 N 4 (MCN) composite was synthesized for the utilization as a visible-light catalyst to activate S(IV) under visible-LED (Vis-LED) for the organic degradation . The incorporation of Fe 3 O 4 in g-C 3 N 4 up-regulated the photocatalytic performance in the S(IV) activation for X-3B degradation, and > 98% of X-3B (20 mg L −1 ) was degraded with the degradation rate constant ( k obs ) of 0.110 min −1 within 30 min. The SO 4 •− and 1 O 2 produced in the MCN/S(IV)/Vis-LED system were identified as the primary reactive species through the quenching experiments and electron spin resonance. Interestingly, the light-induced generation of superoxide radical (O 2 •− ) played a negligible role in the formation of 1 O 2 , and most of 1 O 2 was corroborated to be originated from SO 4 •− besides SO 5 •− , which was rarely reported in other S(IV) activation processes. The catalysts before and after utilization were characterized to further elucidate the mechanisms for the S(IV) activation. There were two possible pathways for the S(IV) activation: the electron transfer from S(IV) to the photo-generated holes and the ligand-to-metal charge-transfer (LMCT) within the surface Fe(III)−S(IV) complexes. Furthermore, the MCN/S(IV)/Vis-LED system was of high resistance to complex water matrixes (pH, inorganic anions, etc.), demonstrating its application perspective in the purification of wastewater containing organic pollutants .
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jiaqi He,Jianlin Sun,Yanan Meng,Huajie Tang,Ping Wu
Nanofluids containing nanocomposite materials have broad application prospect in lubrication . In the present study, MoS 2 -Al 2 O 3 nanocomposite was synthesized by solvothermal method . Then water-based nanofluid containing MoS 2 -Al 2 O 3 nanoparticles was prepared and it exhibited optimal stability and wettability . The tribological properties of MoS 2 -Al 2 O 3 nanofluid under steel/steel contact were investigated. Through chemical analysis of worn surface, tribochemical reactions occurred and tribofilm generated at friction interface were studied to reveal the lubrication mechanism. The results showed that MoS 2 -Al 2 O 3 nanofluid exhibited outstanding effect on reducing the friction force and wear rate of friction pairs. The superior lubrication performance was partly attributed to the entry and movement of nanoparticles at friction interface. More importantly, due to interfacial tribochemistry , a tribofilm with double layer structure composed of adsorption film and reaction layer was formed on the metal surface , preventing the direct contact of steel surfaces. The adsorption film with a thickness of about 16 nm was predominated by amorphous substrates and crystal phases (ultrafine Al 2 O 3 and MoS 2 debris) embedded in the top. And the reaction layer beneath adsorption film contained high mechanical properties iron oxides (mainly Fe 3 O 4 and Fe 2 O 3 ) and self-lubricating Fe 2 (SO 4 ) 3 , which further alleviated friction and enhanced the wear-resistance of materials.
研究领域:
材料科学
·
摩擦学
·
化学工程
·
机械工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 35
·20465-20475
·
IF 5.1
Weiyi Li,Min Zhang,Shen Cai,Yan Xin,Huajun Tian
Alluaudite-type Na2+2xFe2−x(SO4)3 has been a promising cathode material for sodium-ion batteries (SIBs) due to its high operating voltage and stable structure. However, its actual electrochemical performance suffers from intrinsic sluggish kinetics and poor electronic conductivity. In this work, for the first time, we propose a Na2.48(Fe0.89Mg0.03Sn0.04)1.76(SO4)3 cathode material prepared via a Mg/Sn co-doping strategy. Inactive Mg2+ stabilizes the structure, while Sn4+ inhibits the decomposition of electrolytes under high voltage. The Mg/Sn co-doping strategy enhances the kinetics of sodium ion diffusion reactions, leading to improved electrochemical properties, especially at low temperatures. The optimal NFMS/C-Sn0.03 cathode exhibits a long-term capacity retention of 91.6% after 1500 cycles at 5C and outstanding reversible capacities of 74.3 and 58.3 mAh g−1 at 10C and even at 50C, respectively. Furthermore, the NFMS/C-Sn0.03 cathode demonstrates a high capacity retention of 95.5% at −5 °C and 88.4% at −15 °C, with a remarkable capacity retention of 93.9% after 1000 cycles at room temperature and 85.5% after 700 cycles at −15 °C, respectively. Electron paramagnetic resonance (EPR) and atomic force microscopy (AFM) techniques confirmed that the presence of unpaired electrons and enhanced electronic conductivity could be attributed to the Mg/Sn co-doping. This work provides a feasible approach for designing low-cost, durable, low-temperature, and high-performance cathode materials for SIBs.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Mingyang Liu,Zhongwen Ouyang,Xiaochen Liu,Jiaojiao Cao,Tongtong Xiao,Zhengcai Xia,Zhenxing Wang
Isolated large-spin Heisenberg antiferromagnetic uniform chain is quite rare. Here, we have successfully synthesized an ideal one-dimensional (1D) S = 5/2 linear-chain antiferromagnet [C2NH8]3[Fe(SO4)3], which crystallizes in a trigonal lattice with the space group R3c. A broad maximum at Tmax = 18 K is observed in the magnetic susceptibility curve. Notably, no long-range magnetic ordering is observed down to 2 K even if the material has a large Curie–Weiss temperature of θCW = −25.5 K. High-field magnetization at 2 K shows a linear increase until saturation at 30 T, and a high-field electron spin resonance (ESR) reveals the absence of a zero-field spin gap. The intrachain interaction J and interchain interaction J′ are determined. Quite a small ratio of J′/J < 2.5 × 10–3 suggests that [C2NH8]3[Fe(SO4)3] behaves as an ideal 1D uniform linear-chain antiferromagnet, in which the magnetic ordering is prevented by the extremely small interchain interaction and quantum fluctuation even for a classical spin of S = 5/2.
研究领域:
物理学
·
材料科学
·
磁学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jinxiang Zuo,Donglei Fu,Pengwei Yan,Shuyu Wang,Yabin Li,Linlu Shen,Yizhen Cheng,Jimin Shen,Jing Kang,Zhonglin Chen
In this study, Al-doped NiFe 2 O 4 (NiAl x Fe 2-x O 4 ) was synthesized by the isomorphic substitution strategy, which was further employed for peroxymonosulfate (PMS) activation to remove 2,4-dichlorophenoxyacetic acid (2,4-D) in water. Doping of Al could construct oxygen vacancies (OVs) in the structure of NiAl x Fe 2-x O 4 , which further facilitates the exposure of metal sites for PMS activation. The removal rate of 2,4-D increased greatly compared to the NiFe 2 O 4 -activated process. By the density functional theory (DFT) process, it was verified that Al was more likely to replace Fe rather than Ni. OVs sites have the lowest adsorption energy of H 2 O ( E ads = -0.95 eV), and easily formed surface hydroxyl groups (–OH), which were further replaced by PMS (HSO 5 - ). The formed surface complex Me-O-O-SO 3 - was readily activated via electron transfer between O-O bond, thus promoting the cleavage of it and inducing SO 4 · - generation. This process induced the high performance of the NiAl x Fe 2-x O 4 /PMS system for effective 2,4-D degradation. Furthermore, the purified water showed relatively low toxicity. The present study proposed new insights into the interface mechanism of PMS triggering.
研究领域:
环境科学
·
化学工程
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Huili Liu,Zhuxiu Zhang,Jihai Tang,Zhaoyang Fei,Qing Liu,Xian Chen,Mifen Cui,Xu Qiao
In this article, we use defect engineering approach to fine-tune the pore size of MOF-808-SO 4 . A series of defective MOF-808-SO 4 with different pore size were prepared by varying the amount of isophthalic acid as the defective ligand during the synthesis. We obtained a linear correlation between the concentration of the defective ligand and the pore size via regression analysis. The pore size exerts a significant effect on the catalytic activity in the addition reaction of isobutylene with ethylene glycol. The highest conversion of ethylene glycol was found over MOF-808-20%-SO 4 (2.25 nm) with the largest pore size, whereas MOF-808-5%-SO 4 (1.46 nm) and MOF-808-10%-SO 4 (1.53 nm) exhibited higher selectivity toward ethylene glycol mono-tert-butyl ether. There is a linear correlation between the pore size and catalytic activity only when the pore size ranges from 1.4 to 2.0 nm. MOF-808-15%-SO 4 with the pore size of 1.99 nm exhibits the highest yield of ethylene glycol mono-tert-butyl ether.
研究领域:
材料化学
·
催化
·
金属有机框架材料（MOFs）
·
化学工程
✓ 已验证
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 19
·2500271
·
IF 12.1
Weiyi Li,Bijiao He,Fang Zhang,Yan Xin,Shen Cai,Huajun Tian
Na 2+2x Fe 2–x (SO 4 ) 3 (NFSO) is a promising cathode material for sodium-ion batteries (SIBs) due to its low cost and high operating potential (≈3.8 V). However, poor intrinsic electronic conductivity and sluggish kinetics are major drawbacks to its practical application. Herein, magnesium doped Na 2+2x Fe 2–x (SO 4 ) 3 microspheres (Na 2.54 (Fe 0.97 Mg 0.03 ) 1.73 (SO 4 ) 3 ) are synthesized via a designed spray-drying process. The optimized cathode material (NFSO@C-Mg0.02) possesses excellent rate performance up to 50C (50.8 mAh g −1 at 50C) and long-cycle stability (capacity retention of 78.3% even after 9000 cycles at 10C). Despite an increase in the mass loading to 10 mg cm −2 , the electrode continues to represent a reversible capacity of 72.1 mAh g −1 at 3C. Furthermore, NFSO@C-Mg0.02║HC full cell demonstrates superior cycling stability (80% capacity retention over 8000 cycles at 5C) and high energy density (≈310 Wh kg −1 , based on the cathode). In situ X-ray diffraction (XRD) results reveal that the Mg doping strategy successfully mitigates the variation in lattice volume. The density functional theory (DFT) calculations verify that the prominent rate performance is attributed to the enhanced Na + diffusion kinetics and low ionic-migration energy barrier. This work provides an effective strategy and a fundamental understanding to enhance the electrochemical performance of cathode materials for SIBs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Wei Yang,Qi Liu,Lijuan Hou,Qiang Yang,Daobin Mu,Guoqiang Tan,Li Li,Renjie Chen,Feng Wu
Iron-based sulfate cathodes of alluaudite Na 2+2 δ Fe 2− δ (SO 4 ) 3 (NFS) in sodium-ion batteries with low cost, steady cycling performance, and high voltage are promising for grid-scale energy storage systems. However, the poor electronic conductivity and the limited understanding of the phase-evolution of precursors hinder obtaining high-rate capacity and the pure phase. Distinctive NFS@C@ n %CNTs ( n = 1, 2, 5, 10) sphere-shell conductive networks composite cathode materials are constructed creatively, which exhibit superior reversible capacity and rate performance. In detail, the designed NFS@C@2%CNTs cathode delivers an initial discharge capacity of 95.9 mAh g −1 at 0.05 C and up to 60 mAh g −1 at a high rate of 10 C. The full NFS@C@2%CNTs//HC cell delivers a practical operating voltage of 3.5 V and mass-energy density of 140 Wh kg −1 at 0.1 C, and it can also retain 67.37 mAh g −1 with a capacity retention rate of 96.4% after 200 cycles at 2 C. On the other hand, a novel combination reaction mechanism is first revealed for forming NFS from the mixtures of Na 2 Fe(SO 4 ) 2 · n H 2 O ( n = 2, 4) and FeSO 4 ·H 2 O during the sintering process. The inspiring results would provide a novel perspective to synthesize high-performance alluaudite sulfate and analogs by aqueous methods.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhiming Sun,Rui Zhu,Tianle Ding,Xiangwei Zhang,Chunquan Li
Persulfate activation technology based on sulfate radicals is currently a hot spot in the field of environmental governance. In our work, α-FeOOH was successful in situ loaded on kaolinite surface through a simple one-step hydrothermal process. The prepared composites were systematically characterized, and the relationship between the structural properties and peroxymonosulfate activation properties was explored. Interestingly, compared to bare α-FeOOH, the introduction of kaolinite in composite induced the transformation of α-FeOOH crystal and affected the morphology, where uniformly dispersed nanoparticles rather than rod-like agglomerated crystals appeared. The received FeOOH/kaolinite composite exhibited admirable adsorption and degradation of ciprofloxacin performance with the removal efficiency of 86.1%, and the degradation rate constant was up to 5.2 times higher than that of bare α-FeOOH. In addition, the main active species in the catalytic oxidation system are surface-bound SO 4 •− , • OH and free 1 O 2 . This work would give a deep insight into the role of natural minerals in composite catalytic materials and the construction of high-efficient mineral-based composite materials.
研究领域:
环境科学
·
催化
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiao Feng,Hao Chen,Siyuan Guo,Xiaoyu Wang,Tengfeng Xie,Dejun Wang,Yanhong Lin
Efficient photocatalysts are key to achieving efficient photoactivation of AOPs based on PMS. In this work, a sulfur-rich vacancy magnetically separable Fe 0 /CoS 2 -S v photocatalyst with high surface adsorption capacity and rapid PMS activation capacity was designed for the efficient degradation of typical antibiotics. A tetracycline removal rate of 92.2 % and a high TOC mineralization rate were achieved within 4 min in the PMS/Vis system. The excellent catalytic performance was attributed to the synergistic effect of Fe, Co, and S on PMS activation and the generation of sulfur-oxygen vacancies by the composites. These vacancies greatly enhanced the catalytic performance of the PMS system, where the generated singlet oxygen ( 1 O 2 ) was identified as the main active substance in the degradation process. In addition, the SO 4 2- based photocatalytic-assisted advanced oxidation processes (SR-AOPs) for the degradation of organic pollutants were thoroughly investigated. XPS comparisons before and after the catalyst reaction revealed that the reducing nano-Fe 0 and metastable S 2 2- promoted the cycling between Co 3+ and Co 2+ , thus accelerating the rapid activation of PMS. This work provides a new perspective for the further development of efficient and rapid PMS photo-activators for environmental remediation in water bodies.
研究领域:
环境科学
·
化学工程
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 4
·283
·
IF 4.3
Zhiyuan Song,Sidra Chaudhary,Zainab Bibi,Yong Wu,Qinxiang Jia,Xiaoyong Li,Yang Sun
Two hydrophilic copolymers containing functional groups such as carboxyl, amido, and sulfonic acid are synthesized using ammonium persulfate-catalyzed free radical polymerization in water. Aluminum sulfate is then introduced, resulting in two polymer complexes that exhibit reduced cement setting times (initial, 1.16–2.44 min; final, 2.02–3.14 min) and improved compressive (24 h, 5.81–7.25 MPa) and flexural (24 h, 2.80–2.99 MPa) strengths compared to pure aluminum sulfate-facilitated cementing (initial, 19.11 min; final, 37.05 min; compressive, 24 h, 5.51 MPa; flexural, 24 h, 2.56 MPa). Following this, ball-milled illite powder is added, and the resulting admixtures further display slightly prolonged setting times (initial, 2.35–2.99 vs. 1.16–2.44 min; final, 3.98–4.35 vs. 2.02–3.14 min), along with comparable compressive strengths (5.85–7.11 vs. 5.81–7.25 MPa) and enhanced flexural strengths (3.92–5.83 vs. 2.80–2.99 MPa). Notably, a unique adhesive pozzolanic clinker, Ca54MgAl2Si16O90(54CaO·MgO·Al2O3·16SiO2), emerges in the presence of illite-based admixtures, contributing to the mechanical strength development of the hydrated mortars. Although illite itself is hydrophobic, the coating of ball-milled illite powder with aluminum sulfate and copolymers facilitates its dispersion into the gaps and pores of the cement matrix during setting, thereby increasing the flexural strength. This work presents an interesting approach to utilizing illite materials in cement applications, which is significant for reducing CO2emissions during cement production and use.
研究领域:
材料科学
·
土木工程
·
化学工程
✓ 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）