JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2026
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IF 1.7
Li Shiyu,Fu Chengyun,Zhou Duo,Tian Qiang,Henderson Mark Julian,Zhu Shan,Yan Minhao
The adsorption of Sr 2+ and Cs + onto Gaomiaozi bentonite colloids (GMZC) was investigated to evaluate their role in radionuclide migration. The results show that within a concentration range of 20–100 mg·L⁻ 1 for Sr 2+ and Cs + , the distribution coefficient decreases with increasing ion concentration. The mechanistic study indicates that the adsorption of Sr 2+ is predominantly governed by surface complexation, whereas that of Cs + is mainly driven by ion exchange. Furthermore, Sr 2+ induces structural ordering of GMZC layers and promotes particle aggregation. However, in Na-Cl-SO 4 groundwater, the bentonite suspension showed poor stability and a significantly weakened adsorption capacity for both 90 Sr and 137 Cs, demonstrating the decisive impact of water chemistry on its barrier function.
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高影响因子
Materials Chemistry Frontiers
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2025
·
IF 6.4
Xiyue Zhang,Yingjie Zhou,Minjie Hou,Xiecheng Yang,Kun Ren,Peng Dong,Jiaqian Qin,Da Zhang,Feng Liang
To meet the urgent requirement for sustainable energy storage technologies, incorporating effective waste management into the design of energy storage materials can achieve a closed-loop supply chain from waste to energy. Herein, extrinsic pseudocapacitive (PDC) cathode materials with different carbon contents were synthesized using FeSO4·7H2O waste through a simple ball milling and annealing process, which enhances sodium storage kinetics and achieves waste recycling. The results indicate that NFSO particles and graphite flakes create a disordered porous structure, which enhances the PDC effect, thus overcoming the slow migration rate of sodium-ions. Specifically, the diffusion coefficient of NFSO/C-10 increased by around an order of magnitude compared to that of NFSO, increasing from 10−12 to 10−11. The discharge capacity reached 84 mA h g−1 at 0.2C (1C = 91 mA g−1). The present work realizes the high-value reuse of waste and highlights the crucial role of the PDC effect in enhancing diffusion dynamics, which opens up a new direction for the design and synthesis of high-rate iron-based sulfate cathode materials.
研究领域:
材料科学
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能源存储技术
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Lulu Long,Changwei Bai,Xinyu Zhou,Shirong Zhang,Yanzong Zhang,Chao Chen,Jingsong He,Chun Song,Gang Yang
This study proposed a novel strategy to improve the activation efficiency of PMS by enhancing the utilization of side reactions. Electrocatalysis and PMS activation were coupled in the anode chamber. The electrons were extracted from the catalyst through the electroanode, and the excess low valence elements in the system were converted into high valence elements. Without restricting the activation of PMS, the activation efficiency of PMS was more effectively and comprehensively improved by enhancing the utilization of side reactions. An efficient electrocatalytic anode/Mn 2 O 3 /rGO/peroxymonosulfate (ECA/Mn 2 O 3 /rGO/PMS) system was established with Mn 2 O 3 /rGO as the anode. In this system, the anode current improved the catalyst utilization, which directly converts the excess rGO-C = O, Mn(II) and Mn(III) into rGO-C + -O, Mn(III) and Mn(IV), thereby increasing the yields of •OH, SO 4 • - , and 1 O 2 during PMS activation. Overall, this study provides a novel strategy for improving the activation efficiency of PMS, and has great potential to be widely applied in actual environment remediation.
研究领域:
环境科学
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化学工程
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电化学
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高影响因子
APPLIED ENERGY
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2019
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IF 8.426
Zain Ali Saleh Bairq,Hongxia Gao,Yufei Huang,Haiyan Zhang,Zhiwu Liang
A significant impediment to the widespread adoption of amine-based post-combustion technique for CO 2 capture from flue gas is the huge energy demand for amine solvent regeneration. In this study, five novel bifunctional heterogeneous catalysts e.g., SO 4 2− /ZrO 2 /SiO 2 with different molar ratios of zirconia and SO 4 2− /ZrO 2 as a parent catalyst were synthesized and applied to evaluate their effectiveness in enhancing the CO 2 desorption and solvent regeneration of 5M monoethanolamine solution with CO 2 loading of 0.5 ± 0.01 mol CO 2 /mol monoethanolamine at 97 °C. The catalysts were characterized by Fourier transform-infrared spectrometry, pyridine-infrared spectroscopy, X-ray diffraction, N 2 -adsorption-desorption, and ammonia-temperature programmed desorption. The results demonstrated that these catalysts can significantly reduce the heat duty for CO 2 desorption by 36.48% compared to without catalyst and enhance desorption rate by 35.1%. The results also showed that SO 4 2− /ZrO 2 /SiO 2 15% presented the highest efficiency compared to the other SO 4 2− /ZrO 2 /SiO 2 ratios and the super solid acid catalyst SO 4 2− /ZrO 2 . Additionally, to investigate if the catalysts induce any unfavorable effects on the amine, the absorption of CO 2 by regenerated amine solvent was studied. Finally, a reaction mechanism for the amine solvent regeneration with the synthesized catalyst e.g., SO 4 2− /ZrO 2 /SiO 2 was suggested.
研究领域:
化学工程
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环境科学
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高影响因子
APPLIED ENERGY
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2017
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IF 7.182
Xiaowen Zhang,Xin Zhang,Helei Liu,Wensheng Li,Min Xiao,Hongxia Gao,Zhiwu Liang
In this work, the regeneration of rich CO 2 -loaded monoethanolamine (MEA) solvent with two catalysts (e.g. SAPO-34 and SO 4 2− /TiO 2 ) was investigated in order to reduce the energy requirement for solvent regeneration. The regeneration behavior with and without catalyst of a 5M MEA solution with an initial CO 2 loading of 0.5 mol CO 2 /mol amine at 96 °C was studied to compare their CO 2 desorption rate and heat duties. The results show that the two solid acid catalysts can reduce the heat duty for solvent regeneration and increase the CO 2 desorption rate in comparison with blank test. The mechanism of CO 2 desorption with catalyst in 5M MEA was proposed based on the result of catalyst characterization (e.g. N 2 absorption/desorption experiment, Py-IR, NH 3 -TPD, FT-IR and XRD) to better understand the desorption process. The results indicate that SAPO-34 with the higher joint value of Brϕnsted/Lewis acid sites ratio (B/L) and mesopore surface area (MSA) shows the faster CO 2 desorption rate and lower heat duty than SO 4 2− /TiO 2 . Based on the experimental results, the addition of solid acid catalysts into amine solution could be considered as one of choices to reduce the heat duty for CO 2 desorption from CO 2 -loaded amine solvent.
研究领域:
化学工程
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环境科学
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催化
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Ting Li,Xiaomeng Wang,Yanmei Chen,Jianru Liang,Lixiang Zhou
Heterogeneous Fenton has become a promising economical and environmentally-friendly method for water treatment, however, the production of abundant radical resources (e.g., O 2 − , OH) are oftentimes limited by finite Fe 2+ species to activate H 2 O 2 . Therefore, development of a new iron-bearing solid modified with diverse functional groups for generating a large of radicals in heterogeneous Fenton is significance. Here, we constructed a Fe 3 O 4 -modified schwertmannite (Fe 3 O 4 /Sch) catalyst to activate H 2 O 2 , SO 4 2− and O 2 to produce three kinds of radicals in heterogeneous Fenton reaction. Specifically, Fe 3 O 4 /Sch catalyst was synthesized to improve its surface properties such as the contents of surface Fe 2+ species as H 2 O 2 or O 2 activators to produce OH or O 2 − , the SO 4 2− of Sch surface as SO 4 − precursor, and electron transfer between Fe 3+ and Fe 2+ . Degradation rate of ciprofloxacin (CIP) for 6 min was up to 97% in Fe 3 O 4 /Sch-H 2 O 2 system, which was higher than that in Sch-H 2 O 2 or Fe 3 O 4 -H 2 O 2 . After four successive cyclic experiments, degradation rate of CIP was still achieved 97% within 10 min in Fe 3 O 4 /Sch-H 2 O 2 system. The formation pathways of the relevant active radicals and the degradation pathways of CIP were also proposed by theoretically calculated and LC-MS data. This finding has not only developed an efficient heterogeneous Fenton catalyst, but also given a new idea of SO 4 − generation by modified iron oxyhydroxysulfate mineral for application of heterogeneous Fenton technology.
研究领域:
环境科学
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化学工程
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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
Cheng Chen,Yijie Han,Jing Guo,Lixiang Zhou,Yeqing Lan
In this study, silica gel (SG) was utilized as an assistant to improve the degradation efficiency of p -nitrophenol (PNP) via persulfate (PS) activated with zero-valent zinc (Zn(0)). The effects of various parameters such as the dosages of SG, PS, Zn(0), and the initial pH on PNP degradation via Zn(0)/SG/PS were investigated through batch experiments. The results demonstrated that SG exhibited a strong synergistic role in the decomposition of PNP via Zn(0)-activated PS due to the dispersion and buffering character of SG. The degradation efficiency of PNP was strongly related to the dosage of SG, PS, or Zn(0). A low pH favored of the degradation of PNP. Nevertheless, PNP could be efficiently removed in a pH range of 3 to 9. The radicals of SO 4 •− and • OH were verified to be responsible for the oxidative degradation of PNP. Nevertheless, the contribution of SO 4 •− to the degradation of PNP was much larger than that of • OH. Based on the analyses of HPLC-MS data, it could be determined that C 6 H 7 NO, C 6 H 6 O 2 , and C 12 H 7 N 3 O 8 were the main intermediates generated from the degradation of PNP via Zn(0)/SG/PS. Furthermore, the possible mechanism and the degradation pathways of PNP via Zn(0)/SG/PS were proposed. PS activated with Zn(0) in the presence of SG could be concluded as a promising approach for the degradation of PNP in aqueous solution.
研究领域:
环境科学
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化学工程
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分析化学
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高影响因子
Carbon Neutralization
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2026
·Vol. 5
·期 5
·e70204
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IF 21.5
Fei Wang,Yu Hu,Yixue Huang,Wenkai Wang,Xiaoru Tang,Tong Zhou,Xuguang Gao,Hongyong Sun,Xiangping Chen,Xiongwei Wu,Lishan Yang
Alluaudite-type Na 2+2x Fe 2− x (SO 4 ) 3 (NFS) has attracted considerable attention as a promising cathode for sodium-ion batteries (SIBs), owing to its cost-effective composition and relatively high operating voltage. Nevertheless, the further practical use of NFS is still hindered by its intrinsically low electronic conductivity, slow Na + transport kinetics, and insufficient stability of the cathode interface. Herein, a trace high-entropy-doped sodium iron sulfate cathode, Na 2.5 Fe 1.74125 (MgNiCuZnAl) 0.00175 (SO 4 ) 3 (HE-NFS), is prepared by a spray-drying method. Density functional theory (DFT) calculations show that high-entropy doping narrows the electronic band gap and lowers the Na + diffusion energy barrier. As a result, HE-NFS delivers a discharge capacity of 81.04 mAh g −1 even at 100 C. Analysis after cycling shows that a thin and uniform CEI layer was formed on HE-NFS, which suppresses continuous electrolyte decomposition and interfacial side reactions. The capacity retention remains 83.1% after 500 cycles at 1 C. Moreover, HE-NFS maintains stable electrochemical performance at −10°C and after air exposure, demonstrating its tolerance to low-temperature operation and humid-air storage. These results provide a resource-efficient and scalable cathode-manufacturing strategy for sustainable sodium-ion energy storage toward carbon-neutral energy systems.
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2026
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IF 2.2
Hai-Wen Tang,Jin-Jin Jiang,Ke-Ying Wu,Shi-Yong Mou,Lian-Xiang Chen,Yun-Xiang Chen,Su-Jun Wang,Yun-Qian Zhong,Liu-Si Yu
Sodium-ion batteries (SIBs) are promising alternatives to lithium-ion systems due to abundant resources and good low-temperature performance. However, iron-based sulfate cathodes suffer from poor electronic conductivity and unstable electrode–electrolyte interfaces. To address this, we combined DFT-guided interface design with a scalable synthesis method to build an optimized conductive network. Density functional theory (DFT) calculations identified the interfacial characteristics of weak sodium dodecyl sulfonate (SDS) adsorption and strong carbon adsorption, providing theoretical guidance for achieving uniform carbon dispersion and coating. Using sand-milling and spray-drying, we fabricated a Ketjenblack (KB)-coated core–shell cathode (NFS@KB-4%). The high-surface-area carbon enabled a continuous conductive network and self-assembly of primary particles into uniform spherical secondary particles (5–7.8 μm). This structure simultaneously enhanced electronic conductivity and structural stability. The NFS@KB-4% cathode delivered 84.03 mAh g−1 at 1 C, retained 91.1% capacity after 200 cycles, and exhibited a Na+ diffusion coefficient of 8.24 × 10−8 cm2 s−1—twice that of the control. A soft-pack full cell with hard-carbon anode maintained 97.2% capacity over 60 cycles, demonstrating practical viability. This work paves the way for large-scale use of high-rate, long-life iron-based sulfate cathodes in SIBs.
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Journal of Energy Chemistry
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2016
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IF 2.322
Ran An,Guizhuan Xu,Chun Chang,Jing Bai,Shuqi Fang
Butyl levulinate (BL) is a promising new candidate as diesel fuel and fuel additive. In this study, an efficient process for a one-pot synthesis of BL from biomass-derived carbohydrates in butanol medium with the catalysis of metal sulfates was developed. The catalytic activity of a series of metal sulfates for the synthesis of BL from fructose was investigated. Among various metal sulfates, ferric sulfate Fe 2 (SO 4 ) 3 was found to be the most efficient catalyst, which gave a remarkably high BL yield of 62.8 mol% under the conditions of 463 K, 3 h, a catalyst dosage of 5.0 g/L, and fructose concentration of 25 g/L. Different carbohydrates including glucose, cellulose , inulin and sucrose were also used for one-pot synthesis of BL with the catalysis of Fe 2 (SO 4 ) 3 , showing the yields of 39.6, 30.5, 56.6 and 50.1 mol%, respectively. In addition, the recycling and reuse of Fe 2 (SO 4 ) 3 was studied by characterizing them using powder X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS). A plausible reaction pathway for the one-pot synthesis of BL from fructose was proposed. This study provides a facile and feasible way for the synthesis of BL from biomass.
研究领域:
生物化学
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能源科学
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高影响因子
SCRIPTA MATERIALIA
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2021
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IF 5.611
Lei Meng,Chu Xin Peng,Chen He,Fei Yen
The polarity of the magnetic susceptibility χ( T ) of ammonium alum NH 4 Al(SO 4 ) 2 •12H 2 O single crystals below its ferroelectric Curie temperature T C is identified to depend only on the cooling rate. To explain this, we consider reorienting distorted NH 4 + to carry weak magnetic and electric dipole moments that are linearly coupled. Slow cooling allows the dipole moments to align which enhances χ( T ) to become positive. However, due to energy degeneracy of rotational motion and geometric frustration of the NH 4 + , faster cooling rates render the system to become an orientational glass state causing χ( T ) to remain negative. Specific heat measurements also show the presence of excess entropy below a negative anomaly near 53 K. Our findings identify a possible new class of non-equilibrium system with potential applications in non-volatile memory devices.
研究领域:
物理学
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材料科学
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高影响因子
INORGANIC CHEMISTRY
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2024
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IF 4.3
Yunqi Zhao,Yipeng Song,Yanqiang Li,Wei Liu,Yang Zhou,Weiqi Huang,Junhua Luo,Sangen Zhao,Belal Ahmed
Birefringence is an important linear optical property of anisotropic crystals that plays a significant role in regulating light polarization. A new bialkali–rare earth metal sulfate, NaRbY2(SO4)4 compound, consisting of non-π-conjugated alkali metals and rare earth metal-centered dodecahedral YO8 has been synthesized. The structure analysis suggests that the three-dimensional (3D) structure of the compound is found to be attributable to the combination of dodecahedral YO8 and tetrahedral SO4 groups with Na+ and Rb+ located in the cavities. The ultraviolet, visible, and near-infrared (UV–vis–NIR) spectra reveal that the compound exhibits transparency at a wavelength of less than 200 nm. The observed birefringence of the compound is 0.045@550 nm, which is comparatively larger than that of most deep-ultraviolet (DUV) birefringent crystals. The birefringence mainly originated from the YO8 dodecahedron, which is suggested by first-principles calculations. This research work can provide a useful perspective to explore new DUV sulfates with excellent birefringence.
研究领域:
材料科学
·
光学
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高影响因子
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