INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Shuaifeng Liu,Edouard Asselin,Zhibao Li
The disposal of titanogypsum, also known as red gypsum, which is generated during the titanium dioxide sulfate process, has become a significant environmental challenge. We propose a new process to recover iron impurities such as FeCl2·4H2O and to convert titanogypsum to saleable hemihydrate gypsum. For this purpose, we use HCl–FeCl2 solution generated via the reaction of H2SO4–FeSO4 with CaCl2 to leach iron hydroxide from titanogypsum. The hemihydrate precipitation and phase-transition kinetics of the reaction of HCl–H2SO4–FeSO4 with CaCl2 are experimentally investigated at 353 K. The common ion effect of CaCl2 in the FeCl2 solution for FeCl2·4H2O crystallization is predicted by NRTL modeling of the solid–liquid equilibria of the FeCl2–CaCl2–H2O system. High-quality, saleable α-gypsum and FeCl2·4H2O solids obtained by treating titanogypsum samples provided by a commercial processing plant further shows that the new process is feasible.
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
PHYSICS AND CHEMISTRY OF MINERALS
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2024
·Vol. 51
·期 2
·1-10
·
IF 1.2
Yao Yao,Liu Xi,Du Xueyan,Zhang Lili,Yuan Hongsheng
Iron hydroxide FeO 2 H x ( x ≤ 1) and ferrous iron chloride FeCl 2 can adopt the HP-PdF 2 -type (space group: \(P{a_{\overline 3 }}\) , Z = 4) structure in the lowermost mantle, potentially contributing to the geochemical cycles of hydrogen and chlorine within Earth’s deep interior, respectively. Here we investigate the high-pressure behavior of HP-PdF 2 -type FeCl 2 by X-ray diffraction (XRD) and Raman measurements in laser-heated diamond anvil cells. Our results show that HP-PdF 2 -type FeCl 2 can be formed at 60‒67 GPa and 1650‒1850 K. Upon cold decompression, the diffraction peaks at pressures above 10 GPa can be indexed to the HP-PdF 2 -type structure. Intriguingly, the calculated cell volumes reveal a remarkable decrease of Δ V / V = ∼ 14% between 36 and 40 GPa, which is possibly caused by a pressure-induced spin transition of Fe 2+ (HS: high-spin → LS: low-spin). We also observe distinct changes in Raman spectra at 33‒35 GPa, practically coinciding with the onset pressures of isostructural phase transition in XRD results. Our observations combined with previous studies conducted at megabar pressures suggest that HP-PdF 2 -type FeCl 2 , with a wide pressure stability range, if present in subducting slabs, could facilitate the transport of chlorine from the middle lower mantle to the outer core.
研究领域:
地质学
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材料科学
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高影响因子
INORGANIC CHEMISTRY
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2022
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IF 5.436
Si-Jia Guan,Peng Zhang,Shen-Jing Ji,Yu Cao,Nian-Tzu Suen
It is well known that the “iron” impurity will influence the oxygen evolution reaction (OER) in an alkaline electrolyte, especially for the Ni-based electrocatalyst. Many research studies have investigated the function of Fe in the OER active phase, such as M(OH)2/MOOH (M = Ni and/or Fe), while, surprisingly, very few studies have examined the function of Fe in the “precatalyst” system. Accordingly, in this work, the Ni3–xFexP (x = 0, 0.5, 1) series as an Ni-based precatalyst was employed to inspect the function of internal and external Fe in the Ni-based precatalyst system. It was realized that the sample with internal Fe (i.e., Ni2.5Fe0.5P and Ni2FeP) exhibits efficient OER activity compared to that of the Fe-free one (i.e., Ni3P) owing to the large amount of active M(OH)2/MOOH formed on the surface. This indicates that the internal Fe in the present system may have the ability to facilitate the phase transformation; it was later rationalized from electronic structural calculations that the d band center of the internal Fe (middle transition metal) and Ni (late transition metal) holds the key for this observation. Adding excessive ferrous chloride tetrahydrate (FeCl2·4H2O) as the external Fe in the electrolyte will greatly improve the OER performances for Ni3P; nevertheless, that the OER activity of Ni2FeP is still much superior than that of Ni3P corroborates the fact that the Fe impurity is not the only reason for the elevated OER activity of Ni2FeP and that internal Fe is also critical to the phase transformation as well as OER performance.
研究领域:
电化学
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材料科学
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催化
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DOI
PubMed
高影响因子
International Journal of Coal Science & Technology
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2024
·Vol. 11
·期 1
·1-16
·
IF 6.9
Sun Zhiming,Wang Xinlin,Jia Shaoran,Liang Jialin,Ning Xiaotian,Li Chunquan
Novel coal gangue-based persulfate catalyst (CG-FeCl 2 ) was successfully synthesized by the means of calcinating under nitrogen atmosphere with the addition of ferrous chloride tetrahydrate (FeCl 2 ·4H 2 O). The phase transformation of the prepared materials and gas products during the heating process are thoroughly investigated. It is suggested that ferrous chloride participated in the phase transformation and formed Si-O-Fe bonds. And the main gaseous products are H 2 O, H 2 , and HCl during the heating process. Besides, the ability of CG-FeCl 2 to activate peroxymonosulfate (PMS) for catalytic degradation of polycyclic aromatic hydrocarbons (PAHs) and phenol was deeply studied. More than 95% of naphthyl, phenanthrene and phenol were removed under optimizied conditions. In addition, 1 O 2 , · OH, and SO 4 ·− were involved in the CG-FeCl 2 /PMS system from the free radical scavenging experiment, where 1 O 2 played a major role during the oxidation process. Furthermore, CG-FeCl 2 /PMS system exhibited superior stability in a relatively wide pH range and the presence of common anion from related degradation experiments. Overall, the novel CG-FeCl 2 is an efficient and environmentally friendly catalyst, displaying potential application prospect in the field of PAHs and phenol-contaminated wastewater treatment.
研究领域:
环境科学
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化学工程
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催化
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材料科学
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废水处理
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Lantong Gou,Xiandong Hao,Zhiyong Xu,Wenbo Zhao
Nitric oxide (NO), a major air pollutant from coal-fired power plants, demands an efficient capture for environmental and industrial applications. Ferrous-based absorbents exhibit promising potential for NO capture due to rapid Fe2+-NO complexation. Herein, a novel nonaqueous FeCl2/PEG200 mixture absorbent was designed by employing FeCl2 as the Fe2+ source and PEG200 as the solvent. The FTIR/UV–vis spectrum confirmed Fe2+-NO complex formation and suggested possible reaction mechanisms. Dynamic sorption experiments were systematically conducted to evaluate sorption performance. Kinetic and thermodynamic analyses obtained activation energy, enthalpy change, and entropy change information. Most importantly, a new sorption kinetic model has been established, which can be used to predict the NO sorption capacity at any temperature and partial pressure. Cyclic sorption─desorption testing demonstrated a high desorption efficiency (>91%) and robust cyclic stability over 4 consecutive cycles. This work establishes the FeCl2/PEG200 system as an efficient, reusable, and scalable candidate for industrial NO capture.
研究领域:
环境工程
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化学工程
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工业化学
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大气污染控制
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材料科学
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2016
·Vol. 20
·期 7
·1941-1948
·
IF 2.327
Li Mei,Yin Wenchao,Han Xianlong,Chang Xiaoqing
The homogeneous polyaniline–graphene oxide (PANI-GO) nanocomposites were facilely assembled with a redox system in which cumene hydroperoxide (CHP) and iron dichloride (FeCl 2 ) acted as oxidant and reductant, respectively. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed that PANI scales coated uniformly on the surface of GO sheets owing to the synergistic effect between the PANI and GO. The obtained PANI-GO nanocomposites exhibited improved electrochemical performance as an electrode material for supercapacitors compared with the pure PANI. The specific capacitance of the PANI-GO nanocomposites was high up to 308.3 F g −1 , much higher than that of the pure PANI with specific capacitance of 150 F g −1 at a current density of 1 A g −1 in 2 M H 2 SO 4 electrolyte. The Raman and XPS results illustrated that enhanced electrochemical performance might be attributed to the π - π conjugation between the PANI and GO sheets.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
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IF 9.8
Yongqing Zhang,Xiaolong Shang,Jiaqi Guo,Ling Ao,Caihong Shen,Miao Liu,Feng Lin,Wenxian Li,Liqiang Zhang,Baoguo Sun,Wei Dong,Xiaotao Sun,Yanfei Xiong,Songtao Wang,Bo Deng
Sensitive detection of aliphatic aldehydes in food is hindered by excess derivatization reagents. In this study, a computationally driven screening-construction-mechanism strategy is proposed to enrich aldehyde derivatives while mitigating the adverse effects of excess derivatization reagents. Density functional theory was employed to optimize 20 functional monomers, seven solvents, and three cross-linkers, followed by tuning template/monomer ratios and Fe 2+ dosage to synthesize magnetic molecularly imprinted polymers MMIPs-APBA under the optimal parameters. As magnetic solid-phase extraction (MSPE) adsorbents, MMIPs-APBA achieved rapid equilibrium (10 s), high selectivity for aldehyde derivatives (imprinting factor of 6.2), and minimal adsorption toward derivatization reagents (imprinting factor of 0.025), blocking over 90 % interference signals. Finally, the adsorption mechanism of aldehyde derivatives by MMIPs-APBA is elucidated by three wave function analysis methods. The developed method, combining MMIPs-APBA-based MSPE with gas chromatography–mass spectrometry, is successfully applied for the rapid and accurate determination of eight aliphatic aldehyde derivatives in food samples.
研究领域:
分析化学
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食品安全
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材料科学
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计算化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CONTROLLED RELEASE
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2025
·
IF 11.5
Peng Jiang,Yongnian Zeng,Wen Zhang,Jiapeng Lei,Xue Jiang,Wei Li
Reactive oxygen species (ROS)-based therapies have emerged as promising non-antibiotic strategies for treating infected wounds due to their broad-spectrum antimicrobial activity and low risk of resistance development. However, their clinical translation remains limited by low delivery efficiency, poor bacterial targeting, and uncontrolled post-treatment inflammation. To address these challenges, we reported a multifunctional bilayer microneedle patch (LFT/S-MN) designed for efficient bacterial eradication and enhanced wound healing. The patch integrates positively charged lactoferrin-based nanoparticles (LFT NPs) conjugated with a porphyrin sonosensitizer (TAPPFe) in the dissolvable base layer, and a pH-responsive tip layer loaded with the anti-inflammatory agent spermidine (SPD). Upon insertion into infected tissue, the released LFT NPs efficiently target and aggregate negatively charged bacteria, enabling robust ROS generation through synergistic chemodynamic and sonodynamic therapy (CDT/SDT) under ultrasound stimulation. Concurrently, the acidic wound microenvironment triggers the gradual degradation of the tip layer, allowing controlled SPD release for immunomodulation. In a murine P. aeruginosa -infected wound model, the LFT/S-MN patch significantly reduced bacterial load, suppressed inflammation, promoted collagen deposition and neovascularization, and accelerated wound closure. This work presents a promising non-antibiotic strategy for wound disinfection and regeneration through synergistic CDT/SDT and inflammation modulation.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
·
IF 4.6
Feng Zhou,Shijie Liu,Yuanyuan Zhao,Xinzhi Liu,Danfeng Qin,Hua Liu
In this work, a high-sensitivity electrochemical sensor was developed using a hybrid strategy, where sheet-like MXenes-based composites (Bi-MOF/MXenes) were prepared through the in-situ growth of bismuth-based metal-organic frameworks (Bi-MOF) on the MXenes surface. This hybrid composite material was fabricated using a simple physical synthesis method, which maintains excellent electrocatalytic activity while enhancing the electron transfer rate and electroactive surface area. The Bi-MOF/MXenes modified electrode has been demonstrated to be an effective tool for the detection of nitrite. The electrode exhibited a remarkable limit of detection (LOD) of 0.028 μM and a wide linear range of 0.5~4715 μM. The sensor exhibited remarkable repeatability and reproducibility, with relative standard deviation (RSD) values of 1.74% and 4.87%, respectively. The proposed approach was effectively utilized for detecting nitrite in sausage and fermented bean curd.
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DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yufeng Xue,Xiaolin Ye,Zhuonan Yu,Zihao Peng,Shuqing Xing,Jinrong Chen,Qixing Wu,Xuelong Zhou
As global energy demand continues to grow, developing scalable and efficient energy storage systems with high energy density becomes increasingly critical. This study addresses these needs by exploring the use of mixed-acid electrolytes and premixed configurations in Sn-Fe redox flow batteries. We demonstrate significant improvements in solubility, electrochemical stability, and cycling durability. Specifically, incorporating sulfate ions into the electrolyte mitigates the common-ion effect, greatly increasing the solubility of ferrous and stannous chlorides and enabling higher energy densities of 24.22 Wh·L −1 at 80 mA cm −2 under room temperature. Electrochemical analyses reveals that sulfate ions positively shift the Sn 2+ /Sn redox potential by 120 mV at the negative side and also expand the operational voltage window beyond 1.44 V vs. SHE at positive side, significantly reducing undesirable side reactions such as chlorine evolution. Sulfate-rich electrolytes maintain superior stability, achieving coulombic efficiencies above 98 % under diverse operating temperatures. Additionally, a novel hydrogen-Fe 3+ rebalancing method is developed to effectively address Fe 3+ accumulation, restoring battery capacity from near depletion to around 15 Wh·L −1 . These findings underline the potential of mixed-acid premixed electrolyte systems and hydrogen-mediated rebalancing as robust strategies for advancing high-performance, scalable, and sustainable aqueous energy storage solutions.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yechen An,Jinglong Han,Xiaoxu Gao,Ruiyun Ren,Miaomiao Tan,Wenhai Zhang,Xianshi Wang,Haoran Xu,Ruifeng Yan,Wenli Jiang,Yu Tao,Aijie Wang
Advanced treatment of high-salinity organic wastewater from the fine chemical industry is a critical environmental challenge. Graphene oxide (GO) membranes show promise for separating organic compounds and inorganic salts, but their industrial application has been limited by issues with scalability, performance stability, and fouling control. To overcome these barriers, we developed a disc-tube graphene oxide (DTGO) membrane system by optimizing preparation parameters, stacking membrane discs, and integrating in situ fouling mitigation. Our optimized DTGO membrane exhibited exceptional durability during 280-h cross-flow filtration, maintaining stable water flux (∼60 LMH), high rejection of neutral and negatively charged organics (>90 %), and minimal salt retention (<7 %). The DTGO membrane, which can be easily scaled up through disc stacking, showed superior antifouling performance, with a lower flux decline (12.5 %) and irreversible fouling (33 %), compared with GO membranes on other substrates and organic membranes in simulated wastewater. The introduction of hydroxyl radicals further increased the number of hydroxyl functional groups on the membrane surface, enhancing the formation of a protective hydrated layer and reducing flux decline by over 70 % (flux decline 3.5 %). This work demonstrates the potential for large-scale GO membrane deployment, which offers a cost-effective and environmentally friendly solution for sustainable wastewater treatment and resource recovery.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Haotian Tang,Mengwei Guo,Rongrong Deng,Mingyuan Gao,Qibo Zhang
This study investigates the electrorefining of zinc derived from hot-dip galvanizing (HDG) slag, employing a deep eutectic solvent (DES) composed of choline chloride and ethylene glycol, commonly referred to as Ethaline DES. A thorough electrochemical analysis was carried out to examine the oxidative dissolution behaviors of metallic zinc and associated impurity metals, along with the reduction behavior of Zn(II) ions. These findings demonstrate that, in the Ethaline-ZnCl 2 DES system, zinc undergoes oxidation preferentially compared to impurities, enabling selective extraction of zinc from HDG slag. Furthermore, the reduction potential of Zn(II) is observed to be more positive than that of the impurity metal ions, favoring its preferential deposition at the cathode. Increasing the temperature and incorporating an appropriate quantity of water significantly reduce the viscosity and improve conductivity of the Ethaline DES system, thereby enhancing charge transfer and diffusion of Zn(II) ions while lowering the energy barrier for Zn(II) reduction. Under optimized electrorefining conditions, the resulting cathodic zinc achieves a purity of 99.967 %, with a current efficiency of 95.14 % and an energy consumption of 787 ± 26 kWh/t. This work proposes a sustainable and energy-efficient method for the electrorefining of zinc from HDG slag, presenting a viable pathway for the valorization of this metallurgical byproduct.
研究领域:
冶金学
·
电化学
·
可持续材料加工
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回收技术
·
绿色溶剂
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）