SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yiqun Chen,Xiaori Huang,Dedong Sun,Hongchao Ma,Guowen Wang,Chun Ma,Jun Hao
In this study, the Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composite catalyst was synthesized by co-precipitation method. The morphology and the structure of Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composites were characterized by XRD, FTIR, SEM, TEM, EDS, XPS, VSM. The results showed that the removal rate of RhB (10 mg/L) reached 99.5% in 40 min in the 0.4-Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 (200 mg/L) + PMS (50 mg/L) system with a pseudo first-order degradation rate constant (k) of 0.121 min −1 , which is nearly 2.16 times of that (0.0561 min −1 ) in the Co 3 [Co(CN) 6 ] 2 + PMS system and 18.9 times of that (0.0064 min −1 ) in the Fe 3 O 4 + PMS system. The observed synergistic catalysis between Fe 3 O 4 and Co 3 [Co(CN) 6 ] 2 in Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 enhanced the degradation of RhB. The electron paramagnetic resonance (EPR) analysis and quenching experiment indicated that SO 4 − and OH played important roles in the degradation process of RhB. A synergistic catalytic mechanism of PMS activation by Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 , which mainly involves the enhanced Co 2+ /Co 3+ cycle by Fe 2+ donated electrons, was proposed. In summary, owing to its easy preparation, excellent catalytic activity, and reusability, the Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composite catalyst is a good candidate for remediation of contaminated water.
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
CLEAN-Soil Air Water
·
2019
·Vol. 48
·期 2
·1900455
·
IF 1.512
Chaorong Liu,Jing Zhang,Qingguo Wang,Peng Zhou,Sikui Hu
Experiments on the degradation of acid orange 7 (AO7) using micron-sized zero-valent copper (ZVC) are conducted in acidic aqueous solution under ultrasonic (US) irradiation. The US/ZVC/peroxymonosulfate (PMS) process for AO7 degradation is significantly better than that of an independent system. Based on the characterization of ZVC, it is observed that the corrosion speed of ZVC increases after ultrasound, owing to which a greater amount of Cu + (0–3.03 mg L −1 ) and Cu 2+ are produced. Exposure to US irradiation increases the available surface area of the catalysts to generate many new reactive sites for the degradation process. The AO7 degradation rate after the addition of a new copper reagent—neocuproine hemihydrate—from 6.33% to 100% proved that Cu + is the main activator of PMS. Results indicated that free radicals (OH • and SO 4 −• ) act as activators of PMS in the process. And higher ultrasound power, lower solution pH, and a larger ZVC dose are favorable for AO7 removal.
研究领域:
环境科学
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化学工程
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水处理
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DOI
高影响因子
Energy Storage Materials
·
2026
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IF 19.3
Xizhao Wang,Xingshuang Wu,Fenghua Zheng,Lang Zhao,Hongbo Chen,Min Tang,Xinyou He,Wei Xu,Xiangdong Zhu,Zhiming Xiao,Xinghui Liang,Lei Ming,Xing Ou
Alluaudite-type Na 2+2x Fe 2−x (SO 4 ) 3 is considered as a promising cathode for large-scale energy storage due to its high structural stability and cost-effectiveness. However, due to low theoretical specific capacity, NFS still exhibits insufficient overall cost competitiveness, and it also suffers from low intrinsic electrical conductivity. Here, we propose a direct regeneration strategy based on industrial byproducts to prepare a low-cost and high-conductivity Na 2.56 Fe 1.65 Mg 0.05 Mn 0.014 Al 0.006 (SO 4 ) 3 cathode. Compared to traditional synthetic routes for pure compounds, the direct degeneration of industrial byproducts can reduce iron source costs by approximately 83%. In addition, Mg, Mn and Al impurities from industrial byproducts are in situ doped into the polyionic framework, achieving functionalized utilization. Mg/Mn/Al co-doping not only induces strong interactions with oxygen to stabilize the crystal structure, but also decreases Na + migration energy barriers and enhances the electrical conductivity. Na 2.56 Fe 1.65 Mg 0.05 Mn 0.014 Al 0.006 (SO 4 ) 3 exhibits low lattice strain and uniform ion concentration distribution during electrochemical processes, demonstrating excellent rate capability and cycling stability. It shows 100% capacity retention after 1500 cycles at 3 C, and delivers a high discharge capacity of 50.16 mAh g −1 at 30 C. This study provides a scalable route for the valorization of industrial waste and the development of low-cost, high-performance polyanionic cathodes for sodium-ion batteries.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122309
·
IF 7.5
Hongjiang Peng,Yanyu Song,Cong Lu,Gongjie Hua,Jinhong Wu,Kuangfei Lin
Advanced oxidation processes based on peroxymonosulfate (PMS) activation show promising application prospects in the field of water treatment, yet the efficient utilization of reactive oxygen species (ROS) in different spatial regions (bulk solution and catalyst surface) remains challenging. In this work, a catalyst consisting of trace cobalt ion-complexed hydroxyapatite (Co-HAP) was prepared, which exhibits excellent spatial synergistic oxidation effects. Bulk SO 4 •− and in-situ generated surface •OH ensure the efficient removal of levofloxacin (LEV) (74.5% within 20 min). Quenching experiments reveal the surface-mediated ROS evolution pathway, where bulk SO 4 •− reacts with the abundant lattice hydroxyl groups (-OH) on the HAP surface to in-situ generate surface-bound hydroxyl radicals (•OH surf ). Bulk SO 4 •− originates from the activation of PMS by Co ions. Electrochemical characterization and charge density difference simulation confirm that PMS receives electrons from the catalyst, thus inducing the breakage of O-O bonds to generate SO 4 •− . Therefore, bulk SO 4 •− is responsible for attacking dissolved pollutants, while LEV adsorbed on the catalyst surface is "precisely targeted" by surface-confined •OH. This "two-pronged" synergistic strategy significantly reduces mass transfer resistance and achieves efficient utilization of ROS, thereby the degradation rate ( k obs value) of LEV by Co-HAP is 4.6 times that by Co ions alone. Moreover, the Co-HAP system exhibits excellent stability and promising anti-interference ability. This study provides new insights into the positive role of carrier surface functional groups in regulating ROS distribution and evolution in heterogeneous catalysis.
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高影响因子
PHYSICAL REVIEW B
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2025
·Vol. 111
·期 13
·134401
·
IF 3.7
M. Y. Cui,Z. Y. Zhao,Z. Y. Wu,J. F. Wang,Z. Z. He
Chemical substitution is an effective route to manipulate the magnetic exchange couplings and modify the magnetic properties. However, replacement between ${\mathrm{Cd}}^{2+}$ and ${\mathrm{Hg}}^{2+}$ cations, both belonging to IIB group in the periodic table but having quite close ionic radii, is rarely studied. In this work, the chemical-pressure effect in $A{\mathrm{Co}}_{2}({\mathrm{Te}}_{3}{\mathrm{O}}_{8})({\mathrm{SO}}_{4})\phantom{\rule{4pt}{0ex}}(A=\mathrm{Hg},\mathrm{Cd})$ is reported, which is an $S=1/2$ structural screw-chain antiferromagnetic series with two unique Co positions. Magnetic susceptibility, specific heat, and high-field magnetization measurements on both polycrystal samples suggest that Hg compound experiences two successive antiferromagnetic transitions at ${T}_{\mathrm{N}1}=25.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ and ${T}_{\mathrm{N}2}=21.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ in zero field, and multiple field-induced transitions at ${B}_{1}=10.5\phantom{\rule{4pt}{0ex}}\mathrm{T}, {B}_{2}=13\phantom{\rule{4pt}{0ex}}\mathrm{T}$, and ${B}_{3}=19.5\phantom{\rule{4pt}{0ex}}\mathrm{T}$ at 1.6 K. By contrast, a single magnetic transition takes place at ${T}_{\mathrm{N}}=20$ K and ${B}_{\mathrm{c}}=10.7\phantom{\rule{4pt}{0ex}}\mathrm{T}$ in Cd compound. Different twists of ${\mathrm{CoO}}_{6}$ octahedra are discussed to be responsible for the distinct magnetic behaviors. To further understand the influence of the chemical pressure, additional anisotropic characterizations are performed on Hg single crystal and subsequently the magnetic field $\mathrm{versus}$ temperature phase diagrams are established. Large magnetic anisotropy is observed with the moments lying within the $bc$ plane. Besides, a possible field-induced order-disorder transition is uncovered under the application of a magnetic field along the $b$ axis. The opposite features of the anisotropic magnetic susceptibility in Hg compound might demonstrate separate antiferromagnetic orders of the two Co sublattices, the discrepancy of which is reduced due to the weakened twist of ${\mathrm{CoO}}_{6}$ octahedra in Cd compound, leading to a simultaneous occurrence of these transitions instead.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Sheying Dong,Qian Zheng,Guiqi Huang,Xiaohong Wang,Tinglin Huang
A new method based on coordination polymer [Cu(bipy)(SO4)]n (CP) and functionalized CP, which have a low cost and a easy preparation for selective removal of two organic pollutants in aqueous solution was proposed. Experimental results indicated that CP had excellent adsorption capacity for Alizarin red S (ARS) (1051 mg g–1) and Acid orange 7 (AO7) (989 mg g–1) by ion-exchange interaction. It was found that the kinetic and equilibrium adsorptions were well-modeled using the pseudo-second-order kinetic and the Langmuir isotherm model, respectively. Furthermore, the anionic surfactant (sodium dodecyl sulfonate, SDS) was introduced into the chain structure of CP by anionic exchange to form functionalized CP material (CP/SDS) to remove another type of organic pollution which was representative fluoroquinolone antibiotics like Enrofloxacin (EF), Sparfloxacin (SF), and Levofloxacin lactate (LL) from aqueous solution. Several conditions affecting the removal efficiency of three antibiotics including the composition ratio of SDS in adsorbent, pH, adsorbent dosage, and ionic strength were investigated. Due to the hydrophobic effect of the long methylene chain units in SDS molecular and cyclopropyl, phenyl and alkyl groups in antibiotics, the CP/SDS adsorbent have remarkable adsorption capacity for three antibiotics compared to some commercially available adsorbents, and it requires only 10 min to reach adsorption equilibrium. Thus, the results of this work demonstrate that CP and functionalized CP as the promising adsorbent materials can selectively remove two types of organic pollutants from aqueous solution. In the meantime, it exhibits the alternative exploitation approach for one-dimensional CP in environmental applicability.
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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DOI
高影响因子
Journal of Cleaner Production
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2019
·
IF 6.395
Taotao Qiang,Qi Zhang,Liang Chen
Down fibers is the most popular filling material and widely applied in daily life products such as homes, apparel and sporting gear due to its features of being natural, soft and warm keeping. The fluffiness is quite important to reflect the excellent performance of down fibers. However, owing to the short feeding cycle of poultry, the high content of immature down fibers leads to low fluffiness, which affects the quality of down fibers. In our work, the down fibers with amount of maximum raw materials and the fluffiness of 450 cm 3 /30 g were taken as the research samples. Clean and efficient alkaline zirconium sulfate was used as fluffing agent of down fibers. The cost of using alkalized zirconium sulfate treatment is relatively cheap compared with the traditional fluffing agent glutaraldehyde. Different doses of alkalized zirconium sulfate were used to cross-link the natural down fibers to improve the fluffiness. The results showed that when the dosage of alkalized zirconium sulfate was 2% of the weight of fibers, the performance of down fibers were the best and the fluffiness increased by 25%. It has a good practical significance to improve the economic benefits of down manufacturers. Meanwhile, the down fibers treated with alkalized zirconium sulfate were characterized by Energy dispersive spectrometer (EDS), X-ray diffractometer (XRD), Differential scanning calorimetry (DSC) and the changes of free amino content. Furthermore, measurement of zirconium ion concentration in wastewater by ICP showed that alkaline zirconium sulfate has achieved high absorption efficiency. Moreover, ultra depth microscope observation showed that the down fibers treated with alkalized zirconium sulfate have a better dyeing performance compared to untreated fibers. Overall, this work contributed a new insight into the sustainable development of down industry, and it further confirmed that it is a good approach to use the alkalized zirconium sulfate as the fluffing agent to improve the performance of down fibers.
研究领域:
材料科学
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纺织工程
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Yunhuan Chen,Xinyue Liu,Rui Zhang,Weier Wang,Hailong Wang,Yongsheng Ren,Xiaoxiao Duan
High permselectivity and antifouling/self-cleaning nanofiltration (NF) membranes are ideal materials for water treatment, and this vision is expected to be reached through the design of multifunctional self-cleaning interfaces. In this study, we employed metal - polyphenol network (MPN) to mediate in situ mineralization of porous substrates, enabling simultaneous modulation of interfacial polymerization (IP) and catalytic self-cleaning. The findings demonstrate that the mineralized layers employ an interlayer modulation strategy to produce a polyamide (PA) layer that is more hydrophilic, thinner, and structurally denser. As a result, the resulting PA-Fe 3 O 4 -PSF membrane exhibited a 2.5-fold increase in permeance (19.2 L m −2 h −1 bar −1 ) and a 7.3-fold enhancement in Cl − /SO 4 2− selectivity (66.4), compared to the control membrane (PA-PSF). Additionally, its highly polarized membrane surface significantly improved its antifouling performance. Compared to membranes with mineralized layers on the surface (Fe 3 O 4 -PA-PSF), PA-Fe 3 O 4 -PSF constructs a confined space that facilitates more efficient regeneration through in situ catalytic self-cleaning and ensures greater stability during multiple fouling-regeneration cycle operations. This study paves the way for fabricating multifunctional NF membranes with sustainable applications in material concentration, wastewater treatment, and environmental remediation.
研究领域:
水处理
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膜科学
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材料科学
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环境工程
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
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IF 3.849
Jie Gao,Lizhe Yang,Yingying Liu,Fengli Shao,Qianjiahua Liao,Jingge Shang
Nano scale zerovalent iron (nZVI) used in waste water treatment can be more effective when modified with sulfur. In this study, we synthesized biochar-supported sulfide-modified nZVI (S-nZVI/BC) and characterized it using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. Our results reveal that sulfidation resulted in the formation of FeS on the surface of S-nZVI/BC. The Cr(VI) removal efficiency and capacity of the above composite were investigated as a function of initial solution pH/Cr(VI) concentration, reaction time, and presence of background ions (Ca 2+ and SO 4 2– ). Batch experiments revealed that solution pH had a significant impact on Cr(VI) removal capacities, with the maximum observed at pH 2.5. From a kinetic viewpoint, Cr(VI) removal was best described by a pseudo-second-order model. Importantly, the scavenger reaction was significantly promoted in the presence of SO 4 2– , being slightly inhibited by Ca 2+ and dissolved oxygen. Thus, the sulfidised nanohybrids exhibited excellent Cr(VI) removal performance, being well suited to the remediation of Cr(VI)-polluted water.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 35
·29450-29460
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IF 9.5
Yushen Qian,Mengxue Wu,Anyu Hu,Honghao Deng,Nawal K. Almaymoni,Abdullah N. Alodhayb,Jie Li,Jiahong Pan,Ping Chen,Zhicong Shi
Sodium iron sulfate (Na2+2xFe2−x(SO4)3, NFS) is a promising cathode material for sodium-ion batteries (SIBs) for large-scale energy storage systems due to its low cost and long life. However, NFS is an insulator and cannot reversibly store sodium ions to a large extent. To address this problem, an NFS material integrated with carbon nanotubes (CNTs) is developed in this work. The incorporation of CNTs effectively converts NFS from an insulator to a semiconductor, thereby significantly enhancing the electrochemical performance. The NFS@CNTs material incorporates an alluaudite-type framework that improves electronic conductivity, thereby enhancing rate capability and cycling life. By introducing 10 wt% CNTs, the NFS@CNTs composite achieves a high working voltage of 3.8 V (vs. Na/Na+) and an impressive high-rate specific capacity of 80 mA h g−1 at a rate of 20C. Furthermore, it can retain 81.4% of the initial specific capacity after 20 000 cycles at a rate of 50C, demonstrating an outstanding cycling stability. This work not only provides an in-depth understanding of the potential of NES to be used as a high-rate, long-lasting cathode material for SIBs but also lays the foundation for SIBs in large-scale energy storage applications.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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纳米科技
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2026
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IF 3.3
Jingsha Xu,Xiaofeng Zhang,Shanshan Chen,Weiyi Wang,Wenbo Qiu,Weizhao Cai,Liujiang Zhou
Nonlinear optical (NLO) crystals serve as indispensable components in laser technology. Many modifications of sulfate-based NLO materials rely on introducing a single type of functional cation, which in some cases leads to an imbalanced improvement in either NLO response or birefringence. To enable simultaneous improvement of these key properties, we designed and synthesized a novel sulfate compound, Nb2O2(TeO3)2(SO4), using a double second-order Jahn-Teller (SOJT) strategy that introduces both Nb5⁺ (d0 cation) and Te4+ (lone-pair cation) into the sulfate framework. Remarkably, the introduction of distorted [NbO6] octahedra and [TeO3] pyramids enables the material to achieve a remarkable birefringence of 0.197 at 546 nm and a second-harmonic generation (SHG) response of 0.82 times that of KH2PO4 (KDP). Furthermore, the compound exhibits high thermal stability (> 600 °C), maintains chemical stability in both water and concentrated sulfuric acid, and possesses an ultraviolet (UV) cutoff edge at 305 nm. Theoretical analyses confirm that the synergy between the [NbO6] octahedra and [TeO3] pyramids is the key mechanism for the enhanced SHG response and birefringence. This work demonstrates the potential of Nb2O2(TeO3)2(SO4) as an UV-NLO material and validates the effectiveness of the multi-component synergistic strategy in designing advanced NLO crystals.
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高影响因子
Nano Energy
·
2024
·
IF 16.8
Changyu Liu,Kean Chen,Fumin Li,Along Zhao,Zhongxue Chen,Yongjin Fang,Yuliang Cao
Polyanion-type Fe-based sulfates are one of the most promising cathode candidates for sodium-ion batteries (SIBs) due to the low cost and high voltage. However, their practical application is still hindered by the poor air stability. Herein, we report a novel anion-doped Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 cathode material with higher air stability and faster ion/electron transport kinetics compared to pristine Na 2.6 Fe 1.7 (SO 4 ) 3 cathode as evidenced by first-principles calculations. The obtained Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 not only manifests a high discharge capacity of 100.4 mAh g −1 with an operating voltage of ∼3.57 V (Na + /Na), but also exhibits excellent rate performance (∼86.7 mAh g −1 at 30 C) and cycle stability over 6000 cycles (capacity retention of 76.3%). Particularly, Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 cathode still maintain its original crystal structural and sodium-storage property after exposure to air for one week. The high-voltage, long-life, and air-stable Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 could be a competitive cathode candidate for low-cost sodium-ion batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）