TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·
IF 4.7
Hao-ran XU,Wei-chao HUANG,A.V. RAVINDRA,Duc-lenh PHAN,Thi-quynh-xuan LE,Li-bo ZHANG,Shao-hua YIN
The oxidation characteristics of sulfite and thiosulfate were examined by using thermodynamic calculations and simulated desulfurization solution experiments to investigate their difference. Subsequently, a new multistage oxidation method using oxygen−ammonium persulfate was presented and applied to the oxidation of a real desulfurization solution. The results show that the concentrations of thiosulfate and sulfite in the real desulfurization solution decrease from 48.76 and 61.76 g/L to 2.24 and 0.02 g/L, respectively, and the ammonium sulfate products obtained are white with uniform particles. In addition, compared with ammonium persulfate alone, the multistage oxidation method can reduce the ammonium persulfate addition by 37.56% and treatment cost by 28.13%.
研究领域:
化学工程
·
环境科学
·
无机化学
·
工业化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2019
·
IF 5.997
Cheng-Jian Zhang,Xing-Hong Zhang
Utilization of carbon disulfide (CS2), a low-cost and sulfur-rich one-carbon (C1) feedstock, for making sulfur-containing polymers is important for both polymer chemistry and applied environmental science. However, the production of well-defined sulfur-containing polymers from CS2 and epoxides remains a key challenge. Here, we report a robust coupling reaction of CS2 and epoxides for chemoselectively producing poly(thioether)s and carbonyl sulfide (COS) in one pot. The resultant polymer has exclusive thioether units and a thiol (−SH) terminal. This route takes advantage of oxygen/sulfur exchanges through two consecutive reactions, i.e., cycloaddition of CS2 to epoxides and dethiocarboxylative ring-opening polymerization of the generated cyclic dithiocarbonates. The process can be conducted in ambient air with several commercially available organic bases as catalysts (initiators) and extended to a variety of epoxides, yielding COS and diverse poly(thioether)s with tens of grams. This work furnishes an original and practical strategy for utilizing CS2 as a sulfur feedstock in polymer synthesis.
研究领域:
高分子化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Haoran Xv,Qian Zhang,Thiquynhxuan Le,Duclenh Phan,Libo Zhang
Ammonium persulfate has been proven to be effective in purifying thiosulfate (S 2 O 3 2− ) and sulfite (SO 3 2− ) impurities in desulfurization solutions. However, the sole use of ammonium persulfate as an oxidant faces the challenge of high oxidant consumption. In this study, a novel approach was proposed to enhance the oxidation efficiency of ammonium persulfate on sulfur-containing ions through ultrasonic activation. The results indicate that this technology has the advantages of high purification efficiency and low usage of ammonium persulfate. Specifically, the concentrations of S 2 O 3 2− and SO 3 2− decreased from 16.26 g/L and 38.30 g/L to 1.09 g/L and 8.89 g/L, respectively, meeting the actual production requirements; and the usage of ammonium persulfate could be reduced by 10–30 g per liter of solution compared with the case of ammonium persulfate alone. The introduction of ultrasound increased the generation of free radicals (SO 4 · − and ·OH), enhancing their oxidative capacity. The contribution of free radicals to the oxidation of S₂O₃ 2− and SO₃ 2− increased from 11.1 % and 9.8 % to 50.0 % and 25.8 %, respectively. This study reveals that the ultrasonic activated ammonium persulfate is expected to achieve efficient purification of the desulfurization mother liquor and reduce the addition of ammonium persulfate.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Haobin Song,Tong Li,Tingting He,Zhouhao Wang,Daliang Fang,Ye Wang,Xue Liang Li,Daohong Zhang,Junping Hu,Shaozhuan Huang
The intelligent design of catalytic materials with unique architectures has a significant impact on regulating the polysulfides (LiPSs) conversion and boosting the performance of Li − S batteries. Here, starting from 2D catalytic MoS 2 nanosheets and combined with the first-principle calculations, the covalent heterojunction and S vacancy are simultaneously developed in MoS 2 to regulate the electronic structure and improve the LiPSs conversion kinetics. The S vacancy and heterojunction (MoS 2-x -Co 9 S 8-y ) engineering can significantly improve the electrical conductivity of MoS 2 by incorporating shallow donor levels into the MoS 2 . Moreover, the incorporation of Co 9 S 8-y greatly improves the chemisorption ability of heterostructure towards LiPSs. The LiPSs are preferentially adsorbed at the catalytic Mo-S-Co heterojunction, where both Li + and e - are easy to access. The coupled fast Li + /e - transportation of MoS 2-x -Co 9 S 8-y enables direct and fast LiPSs “adsorption-conversion” at the catalytic Mo-S-Co heterojunction with enhanced bidirectional catalytic properties. Due to the ingenious co-engineering of S vacancy and heterointerface, the Li − S cell with MoS 2-x -Co 9 S 8-y /rGO interlayer delivers high sulfur utilization (1382.5 mAh/g at 0.1C), excellent rate capability (710.2 mAh/g at 3C), and long cycle life over 600 cycles (0.06 % capacity decay per cycle). This work demonstrates the great potential of anion deficiency and heterojunction co-construction for high-performance Li − S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiyang Kang,Yutao Dong,Hui Guan,Mohammed A. Al-Tahan,Jianmin Zhang
For the better development of lithium-sulfur (Li-S) batteries, it is necessary to fabricate sulfur hosts with cheap, rapid sulfur reaction dynamic and inhibiting the shuttling effect of lithium polysulfides (LiPSs). Herein, four hollow cubic materials with two kinds of nitrogen-doped carbon derived from Prussian blue analogues (PBA) precursor, Co 9 S 8 /MnS/NC@NC-400, CoS 2 /MnS/NC@NC-500, CoS 1.097 /MnS/NC@NC-600 and CoS 1.097 /MnS/NC@NC-700, are reported when the vulcanization temperatures are regulated at 400 °C, 500 °C, 600 °C and 700 °C, respectively. Among them, Co 9 S 8 /MnS/NC@NC-400, CoS 2 /MnS/NC@NC-500 and CoS 1.097 /MnS/NC@NC-600 have the similar hollow cubic structure, which can physically confine the LiPSs's shuttle, however, the Co vacancies of CoS 1.097 in the CoS 1.097 /MnS/NC@NC-600 can promote the rearrangement of surface electrons, which is beneficial to the diffusion of Li + /e − , improving the electrochemical reaction kinetics. As for the CoS 1.097 /MnS/NC@NC-700 with the same substance but almost collapsed structure, the CoS 1.097 /MnS/NC@NC-600 can accommodate the volume expansion of sulfur conversion. In the four sulfur-host materials, the CoS 1.097 /MnS/NC@NC-600 not only displays the outstanding adsorption ability on LiPSs, but also presents the best electrocatalytic activity in the Li 2 S potentiostatic deposition experiments and active sulfur reduction/oxidation conversion reactions, greatly promoting the electrochemical performances of Li-S batteries. The S@CoS 1.097 /MnS/NC@NC-600 cathode can deliver 1010.2 mA h g −1 at 0.5 C and maintain 651.1 mA h g −1 after 200 cycles. In addition, the in-situ X-ray diffraction ( in-situ XRD) test reveals that the sulfur conversion mechanism is the processes of the α -S 8 → Li 2 S → β -S 8 (first cycle), then β -S 8 ↔ Li 2 S during the subsequent cycles. Based on the fundamental understanding of the design and preparation of Co x S y /MnS/NC@NC hosts with the desired adsorption and catalysis functions, the work can provide new insights and reveal the defect-engineering to develop the advanced Li-S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Gan Cheng,Yujie Peng,Peigao Duan,Enze Li,Chao Lv,Xin Wang,Fangqin Cheng
Coal remains a primary global energy source, however, the continued exploitation has positioned high-sulfur coal as a critical concern, with its desulfurization remaining a significant technical challenge worldwide. In this study, fine high-sulfur samples were selected for investigation, and a series of flotation and electrochemical methods were employed for desulfurization. The results indicate that both sulfur and ash contents of high-sulfur coal decrease with decreasing particle size. The desulfurization efficiencies for different methods are as follows: 31.04% for flotation, 32.15% for grinding-flotation, 41.08% for electrochemistry, 42.04% for ultrasonic-electrochemistry, 49.51% for electrochemical-flotation, and 51.23% for ultrasonic-electrochemistry-grinding-flotation. Flotation effectively removes most of the inorganic sulfur content, while electrolysis can remove both inorganic sulfur and a portion of organic sulfur content. Grinding facilitates the liberation of sulfur inclusions in coal, while ultrasonic treatment aids in detaching gangue minerals from the coal surface, thereby accelerating the electrochemical reactions. Simulation results show that the C-S bond in coal is more resistant to dissociation than the S-S bond. The oxidation efficacy varies across different crystal planes, with the {111} plane exhibiting the most optimal electrochemical oxidation performance. Furthermore, molecular dynamics simulations indicate that both the collector and electrolytic oxidation affect sulfur migration within the coal matrix.
研究领域:
能源工程
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化学工程
·
矿物加工
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电化学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Fang Chen,Huan Li,Tiejin Chen,Zhibing Chen,Yangfan Zhang,Xuliang Fan,Liang Zhan,Lin Ma,Xiaosong Zhou
High loading sulfur cathode is a vital ingredient for the application of high-energy-density Li-S battery. However, the traditional PVDF binder with inherent defects, such as relatively weak adhesion, inferior Li + conduction, and poor polysulfides adsorption, is not suitable for sulfur cathode, especially at high sulfur loading. Herein, the multifunctional LiPAA/PVA binder with crosslinked three-dimensional structure was proposed to substitute PVDF binder. Benefiting from the effective polysulfides adsorption and successful conduction of electron and Li + , the sulfur cathode with LiPAA/PVA binder exhibited superior rate and cycle performance. Even at high sulfur loading of 4.0 mg/cm 2 , the LiPAA/PVA based cathode also shows a highest areal capacity of 3.03 mA h/cm 2 , matching the requirement for high energy density of Li-S battery. Additionally, owing to the low price and water solubility of LiPAA and PVA , the fabrication of LiPAA/PVA based cathode could be finished through an low-cost and environmentally friendly process, demonstrating the potential of LiPAA/PVA binder to realize high loading sulfur cathode in the field of large-scale Li-S battery.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 17
·10704-10713
·
IF 12.732
Hao-Jie Li,Yi-Hua Song,Kai Xi,Wei Wang,Sheng Liu,Guo-Ran Li,Xue-Ping Gao
A sufficient areal capacity is necessary for achieving high-energy lithium–sulfur batteries, which require sufficiently high sulfur loading in the cathode materials. Therefore, the kinetically fast catalytic conversion of polysulfide intermediates is especially important for the full utilization of sulfur. Herein, Co9S8−x/N-doped graphene (Co9S8−x/N-G) is used as a sulfur host material and electrocatalyst in a high-sulfur-loading cathode, in which sulfur vacancies are generated via the hydrogen reduction of stoichiometric Co9S8. The produced sulfur vacancies in Co9S8−x/N-G effectively improve the adsorption ability for polysulfide anions, and theoretical calculations indicate that Co9S8−x has lower adsorption energy for polysulfides than Co9S8. Furthermore, electrochemical experiments reveal that the electrode process kinetics for the catalytic conversion of polysulfides are enhanced by sulfur vacancies. As a result, the S/Co9S8−x/N-G cathode with a high sulfur loading of 14.6 mg cm−2 delivers a high areal capacity of 12.9 mA h cm−2, and long-term cycling stability with a slow decay rate of 0.035% per cycle during 1000 cycles at 1C. Additionally, the pouch cell shows foldable flexibility and a stable areal capacity of 5.9 mA h cm−2 at a sulfur loading of 7.1 mg cm−2. The results show that enhancing the polysulfide conversion process kinetics using sulfur vacancies could be an effective approach for obtaining high-performance lithium–sulfur batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2024
·Vol. 6
·期 24
·6386-6397
·
IF 4.6
Meng Wei,Hanqing Lu,Zhen Wang,Baowen Lu,Pengtao Wang,Xinxin Zhang,Bingjie Feng,Yingjie Xie,Tao Zhang,Guanghui Liu,Song Xu
The slow redox kinetics and shuttle effect of polysulfides severely obstruct the further development of lithium–sulfur (Li–S) batteries. Constructing sulfur host materials with high conductivity and catalytic capability is well acknowledged as an effective strategy for promoting polysulfide conversion. Herein, a well-designed MoS2 QDs-CNTs/S@Ni(OH)2 (labeled as MoS2 QDs-CNTs/S@NH) cathode was synthesized via a hydrothermal process, in which conductive polar MoS2 quantum dot-decorated carbon nanotube (CNT) networks coated with an ultrathin Ni(OH)2 layer acted as an efficient electrocatalyst. MoS2 QD nanoparticles with a high conductivity and catalytic nature can enhance the kinetics of polysulfide conversion, expedite Li2S nucleation, and decrease the reaction energy barrier. The thin outer Ni(OH)2 layer physically confines active sulfur and meanwhile provides abundant sites for adsorption and conversion of polysulfides. Benefiting from these merits, a battery using MoS2 QDs-CNTs/S@NH as the sulfur host cathode exhibits excellent electrochemical performances with rate capabilities of 953.7 mA h g−1 at 0.1C and 606.6 mA h g−1 at 2.0C. A prominent cycling stability of a 0.052% decay rate per cycle after 800 cycles is achieved even at 2C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Xiang Fan,Yurou Zhou,Guan Zhang,Tongzhou Liu,Wenyi Dong
The advanced oxidation processes (AOPs) based on oxysulfur radicals (SO 3 − , SO 4 − and SO 5 − ) has been receiving growing attention in wastewater treatment. In this study, we report the in situ photoelectrochemical activation of sulfite to produce oxysulfur radicals with MoS 2 nanosheets as a wide spectrum absorptive photoanode. At alkaline condition, the selective and efficient conversion of ammonia to dinitrogen was exclusively achieved in the presence of sulfite electrolyte under visible light irradiation. The sulfite plays multiple roles such as working as hole scavenger for improving stability of MoS 2 electrode by inhibiting photo-corrosion and serving as precursor of oxysulfur radicals in the meantime. The influences of radical scavenger, dissolved oxygen and electrolyte on the photoelectrochemical, electrochemical and photochemical conversion of ammonia verified that oxysulfur radicals are more powerful than hydroxyl radicals in terms of ammonia conversion. The proposed system appears to be applicable to in situ treatment of wastewater containing of ammonia and sulfite pollutants, such as wastewater from ammonia-absorption-desulfurization of combustion smoke. This work also provides a new protocol in the design of new AOPs, where oxysulfur radicals can work together with hydroxyl radicals for simultaneous pollutants degradation and detoxification.
研究领域:
环境科学
·
废水处理
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 7
·3834-3844
·
IF 11.301
Daying Guo,Zihe Zhang,Bin Xi,Zhisheng Yu,Zhen Zhou,Xi'an Chen
Reported herein is the investigation of a unique cathode candidate for Li–S batteries, i.e. Ni3S2/(N, S)-RGO-type hybrid materials, which are expected to optimize battery performance by elevating the utilization of sulfur and chemically confining the adsorption/diffusion of polysulfide. Versatile structural and compositional characterizations confirmed the uniform growth and strong chemical coupling of nanostructured Ni3S2 on the N/S co-doped RGO matrix. Rich physical and chemical properties were revealed, namely, the large specific surface area and pore volume, which are beneficial for polysulfide capture, and the 3D conductive network supporting rapid charge transfer to the Ni3S2-polysulfide interface to improve the intrinsic equilibrium of the polysulfide. Specifically, the integration of ∼28.2 wt% of Ni3S2 produced a highly pleated composite with the largest BET specific surface area (618 m2 g−1) and pore volume (1.73 cm3 g−1) among the hybrids studied. This typical material also performed the best in the battery test, recording ultra-high cycling stability over 1000 cycles at the current density of 3C with the capacity decay of 0.023% per cycle. As the sulfur loading per unit area became as dense as 5.8 mg cm−2, the specific capacities were measured as 6.72 mA h cm−2 (at 0.05C), while the capacity retention for the 200-cycle test (at 1C) was still preserved above 72.5%.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 7
·1710-1719
·
IF 8.928
Liwei Shi,Hailiang Fang,Xiaoxia Yang,Jie Xue,Caifeng Li,Shifeng Hou,Cheng Hu
Graphical Doping for batteries : Fe-doped NiSe 2 nanosheets grown on activated carbon cloth substrates provide elevated performance as Li−S free-standing cathodes. Fe-doping in NiSe 2 enables improved charge transfer and stronger interactions with the adsorbed sulfur species, as well as higher electrical conductivity. The transformation of Li 2 S 2 /Li 2 S growth from conventional 2D films to 3D particles eliminates the barriers of phase transitions during the cathode redox processes. The commercialization of Li−S batteries is hindered by the shuttling of lithium polysulfides (LiPSs), the sluggish sulfur redox kinetics as well as the low sulfur utilization during charge/discharge processes. Herein, a free-standing cathode material was developed, based on Fe-doped NiSe 2 nanosheets grown on activated carbon cloth substrates (Fe-NiSe 2 /ACC) for high-performance Li−S batteries. Fe-doping in NiSe 2 plays a key role in the electronic structure modulation of NiSe 2 , enabling improved charge transfer with the adsorbed LiPSs molecules, stronger interactions with the active sulfur species and higher electrical conductivity. Effective promotion of the sulfur redox kinetics and enhanced sulfur utilization were achieved under high areal sulfur loadings. The stronger interactions with LiPSs together with the unique 3D structure of Fe-NiSe 2 /ACC also induced the transformation of Li 2 S 2 /Li 2 S growth from conventional 2D films to 3D particles, significantly eliminating the barriers of solid nucleation and growth during the phase transition of liquid LiPSs to solid Li 2 S 2 /Li 2 S. With a high sulfur loading of 9.9 mg cm −2 , the Fe-NiSe 2 /ACC cathode enabled a high area capacity of 9.14 mAh cm −2 with a low average decay of 0.11 % per cycle over 200 cycles at 0.1 C.
研究领域:
材料科学
·
电化学
✓ 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）