Catalysts
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2022
·Vol. 12
·期 10
·1207
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IF 4.501
Chenliu Tang,Zhicheng Long,Yidan Wang,Dongze Ma,Xiaobiao Zhu
This study investigated the inhibition effects of sulfate on ferrous ion-activated persulfate oxidation of azo dye reactive brilliant red X-3B. The experimental results showed that the degradation efficiency of reactive brilliant red X-3B decreased from 100% to 63% in 60 min when the initial concentration of sulfate increased from 0 to 3 g/L. The ferrous/persulfate molar ratio had remarkable influence on persulfate oxidation capability in presence of sulfate. SO42−could coordinate with Fe2+and Fe3+in generating FeSO4ion pairs as well as FeSO4+or Fe(SO4)2−complexes, which were difficult to activate persulfate and reduced the regeneration of Fe2+. Radicals quenching and electron paramagnetic resonance experiments showed that ·OH and SO4·−were responsible for the oxidation of reactive brilliant red X-3B; however, the addition of sulfate significantly inhibited the generation of SO4·−, and then the generation of ·OH. Moreover, the corresponding Nernst equation indicated that high concentration of sulfate reduced the oxidation potential of SO4·−/SO42−. Experimental results proved that the adverse effects of sulfate on the persulfate oxidation could be counteracted either by batch addition of ferrous or by adding Ba2+to remove SO42−in the system.Keywords:persulfate;sulfate;sulfate radicals;reactive brilliant red X-3B
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Donghong Duan,Kaixin Chen,Chongzhi Xing,Xiaoqiang Wang,Xianxian Zhou,Shibin Liu
The development of lithium-sulfur (Li-S) batteries necessitates the creation of efficient cathode materials . By simultaneous phosphating and sulfurating, a spindle-shaped CoP-Co 3 S 4 heterostructure sulfur cathode substrate made up of numerous tiny needle-like structures is created. The benefits of CoP with outstanding conductivity and Co 3 S 4 with great adsorption capacity are combined in the as-prepared CoP-Co 3 S 4 heterostructures, which achieve efficient capture-diffusion-transformation of polysulfides at the interface. The CoP accelerates the redox kinetics toward polysulfide conversion, and the Co 3 S 4 has a considerable adsorption power toward polysulfides. The quick nucleation of polysulfide and increased capture effectiveness are aided by the quick transfer of polysulfide from the Co 3 S 4 surface to the CoP surface. As a result, the CoP-Co 3 S 4 @S cathode battery with a 1.1 mg cm −2 sulfur load achieves a high initial capacity of 1516.9 mAh g −1 at 0.2 C and maintains that capacity after 100 cycles at 750.1 mAh g −1 . After 300 cycles, even the 565.1 mAh g −1 specific capacity can be attained at 1 C.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Yuchen Cui,Xiaoya Zhou,Xin Huang,Lei Xu,Shaochun Tang
Currently, severe shuttle effects and sluggish conversion kinetics are the main obstacles to the advancement of lithium–sulfur (Li–S) batteries. Modification of the battery separator by a catalyst is a promising approach to tackle these problems, but simultaneously obtaining rich catalytic active sites, high conductivity, and remarkable stability remains a great challenge. Herein, a flower-like MXene/MoS2/SnS@C heterostructure as the functional intercalation of Li–S batteries was prepared for accelerating the synergistic adsorption-electrocatalysis of sulfur conversion. The MXene skeleton constructs a three-dimensional conductive network that anchors polysulfides and enhances charge transfer. Meanwhile, the MoS2/SnS has rich active sites for accelerating polysulfide conversion, leading to excellent electrochemical performances. A battery with MXene/MoS2/SnS@C displays an extraordinary capacity of 836.1 mAh g–1 over 200 cycles at 0.5C and demonstrates a remarkable cycling stability with a capacity attenuation of approximately 0.051% per cycle during 1000 cycles at 2C. When the sulfur loading reaches 5.1 mg cm–2, the capacity still maintains 722.4 mAh g–1 over 50 cycles. This research proposes a novel strategy to design stable catalysts for Li–S batteries with an extended lifespan.
研究领域:
材料科学
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能源存储
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Siyu Zhang,Changdong Ke,Mengge Jiang,Yuancheng Li,Weilin Huang,Zhi Dang,Chuling Guo
Efficient remedies for living organisms including bacteria to counteract cadmium (Cd 2+ ) toxicity are still highly needed. Plant toxicity studies have showed that exogenous S(-II) (including hydrogen sulfide and its ionic forms, i.e., H 2 S, HS − , and S 2− ) application can effectively alleviate adverse effects of Cd stress, but whether S(-II) could mitigate bacterial Cd toxicity remains unclear. In this study, S(-II) was applied exogenously to Cd-stressed Shewanella oneidensis MR-1 and the results showed that S(-II) can significantly reactivate impaired physiological processes including growth arrest and enzymatic ferric (Fe(III) reduction inhibition. The efficacy of S(-II) treatment is negatively correlated with the concentration and time length of Cd exposure. Energy-dispersive X-ray (EDX) analysis suggested the presence of cadmium sulfide inside cells treated with S(-II). Both compared proteomic analysis and RT-qPCR showed that enzymes associated with sulfate transport, sulfur assimilation, methionine , and glutathione biosynthesis were up-regulated in both mRNA and protein levels after the treatment, indicating S(-II) may induce the biosynthesis of functional low-molecular-weight (LMW) thiols to counteract Cd toxicity. Meanwhile, the antioxidant enzymes were positively modulated by S(-II) and thus the activity of intracellular reactive oxygen species was attenuated. The study demonstrated that exogenous S(-II) can effectively alleviate Cd stress for S. oneidensis likely through inducing intracellular trapping mechanisms and modulating cellular redox status. It suggested that S(-II) may be a highly effective remedy for bacteria such as S. oneidensis under Cd-polluted environments.
研究领域:
微生物学
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环境科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2020
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IF 9.567
Hao Li,Ran Zhao,Jiahao Zhu,Zheng Guo,Wei Xiong,Xinwei Wang
Atomic layer deposition (ALD) of metal sulfides has aroused tremendous interest recently for its promising applications in many varieties of areas. However, most of the metal sulfide ALD processes have to use the highly toxic, explosive, and corrosive H2S as the sulfur precursor, which leads to serious concerns for large-scale applications. To circumvent this issue, we herein report an organosulfur precursor of di-tert-butyl disulfide (TBDS) to replace H2S for ALD of metal sulfides. The new ALD process using TBDS with an amidinate-type nickel precursor is demonstrated to show an ideal ALD growth behavior, and it can produce high-quality nickel sulfide (NiSx) thin films with very good purity. An in situ mechanism investigation based on X-ray photoelectron spectroscopy and quartz crystal microbalance further unveils the crucial surface reaction of TBDS during the ALD. In addition, we demonstrate an important application of this new ALD method to synthesize a high-performance electrocatalyst.
研究领域:
材料科学
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无机化学
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纳米科技
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表面科学
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电化学
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半导体工艺
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Hao Cheng,Yi Wen,Chao Huang,Ping Wang,Chengyou Sun,Chongling Feng,Jialu Xu,Li Du,Ting Yan,Min Cheng
In this work, molybdenum carbide (Mo 2 C) was innovatively introduced into the trivalent iron/sodium persulfate (Fe 3+ /PS) based Fenton-like process for tetracycline hydrochloride (TC) degradation, and its co-catalytic performance was compared with three typical metal sulfides (tungsten disulfide (WS 2 ), molybdenum sulfide (MoS 2 ), and cobalt disulfide (CoS 2 )). Results indicated that the Mo 2 C/Fe 3+ /PS system had significantly higher rates of TC removal (0.3054 min −1 ) and Fe(III) reduction (1.6622 min −1 ) compared to the three metal sulfide systems. The Mo 2 C/Fe 3+ /PS system could be adapted to a wide pH range (2.7–8.5), and Mo 2 C still had excellent co-catalytic performance after five cycles. X-ray photoelectron spectroscopy demonstrated the presence of Mo(II) and Mo(IV) on the surface of Mo 2 C, which can directly reduce Fe 3+ , thus significantly improving the reaction efficiency. Quenching and Electron Paramagnetic Resonance experiments demonstrated that four oxidative species were involved in Mo 2 C/Fe 3+ /PS system. The continuous reduction of Fe(III) by Mo 2 C contributed to the significant enhancement of PS activation in the Mo 2 C/Fe 3+ /PS system. Moreover, the presence of water matrix such as chloride ions (Cl − ), nitrate ions (NO 3 − ), and humic acid (HA) had almost no significant effect on TC degradation, indicating that the Mo 2 C/Fe 3+ /PS system can work effectively under complex conditions. In summary, this study provides a novel and efficient strategy to accelerate the Fe(III)/Fe(II) cycle and activate PS for TC degradation, which is expected to advance the development of the Fenton-like process.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
TETRAHEDRON LETTERS
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2018
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IF 2.125
Rongxing Zhang,Shengzhou Jin,Yuanxing Wan,Sen Lin,Zhaohua Yan
A novel, efficient, and green protocol to construct C–S bond has been developed via HBr/H 2 O 2 -mediated sulfenylation of styrenes and 4-hydroxycoumarins leading to unsymmetrical sulfides. Various unsymmetrical sulfides were prepared in one step with moderate to good yields using environmentally-friendly H 2 O 2 as oxidant and HBr as catalyst. Based on the preliminary experimental results, a plausible reaction mechanism was proposed for HBr/H 2 O 2 -mediated formation of C–S bond with thiosulfates .
研究领域:
有机化学
·
绿色化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Hongbin Wang,Jiewen Deng,Xiaohui Lu,Li Wan,Jin Huang,Yiqing Liu
The improvement on diclofenac (DCF) degradation by Fe(II)-activated persulfate (PS) combined with bisulfite (BS) was investigated. It was observed that the introduction of BS in Fe(II)/PS process enhanced the circulation of Fe(III/II) and kept Fe(II) at a high concentration, resulting a rapid and continuous DCF degradation. The initial pH, reagent dosages and reaction temperature played important roles on DCF removal in BS/Fe(II)/PS process. The main iron species in this system were FeHSO 3 + , Fe 2+ and FeOHSO 3 H + , and their variation trends were calculated by the software of MINITEQ 3.1. Based on the alcohols quenching experiments, SO 4 − was confirmed to be the prominent reactive radical for DCF oxidation in BS/Fe(II)/PS process. Moreover, the probable DCF degradation mechanism was proposed based on the detected intermediate products and density functional theory (DFT) calculation. The BS/Fe(II)/PS system presented a synergistic effect for rapid and steady DCF degradation through the occurred cycle of Fe(II/III) (i.e., oxidation of Fe(II) by PS and then reduction of Fe(III) by BS) and solved the drawbacks of slow initial reaction of Fe(II)/BS and weak durability of Fe(II)/PS. This study could provide an effective and environmentally friendly approach to sewage treatment.
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
International Journal of Electrochemical Science
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2023
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IF 1.5
Zhijin Xiong,Ganwen Zhang,Yuxiang Ding,Junjie You,Siqing Cheng
The thin-walled hollow MoS 2 microsphere was synthesized by a facile released online NH 3 -blowing during the reduction of ammonium tetrathiomolybdate ((NH 4 ) 2 MoS 4 ) in N-methylpyrrolidone (NMP) solvent by hydrazine hydrate at 80 ℃ and investigated electrochemically as sulfur host for lithium sulfur battery. The results show that the as-prepared MoS 2 @S electrode delivers an initial specific capacity of as high as 1801 mAh g −1 , albeit partly due to the formation of SEI membrane, indicating the modulation of MoS 2 on the electrochemical reaction of sulfur when compared with bare sulfur electrode. Moreover, the as-prepared MoS 2 @S electrode exhibits excellent cycling stability and good rate capability, corroborating the interaction of MoS 2 with lithium polysulfides (LiPSs) due to the severe shuttling effect in lithium sulfur battery, which is further authenticated by cyclic voltammetry, Tafel plot and electrochemical impedance spectroscopy techniques. This is anticipated to be a straightforward strategy for the practical implementation of lithium sulfur battery as an alternative to the state-of -the-art lithium ion battery.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
ANALYST
·
2025
·
IF 3.3
Yue Cao,Longfei Lai,Qingyuan Bao,Yiru Sheng,Peng Ye,Zhaogang Teng,Yang Zhou
In recent years, the overuse and improper disposal of antibiotics have led to their widespread presence in various environmental matrices and biological fluids. Exploring non-noble metal sulfides as electrocatalysts for reliable antibiotic detection holds substantial value but is limited by their inherent low electrochemical activity. Herein, CoS2 nanoparticles were first synthesized via a hydrothermal method, and used for the in situ assembly of ZnIn2S4 nanosheets. Then, plasma technology was employed for efficient and rapid generation of sulfur vacancies. Detailed studies illustrated the formation of heterojunctions, facilitating electron transfer from the thin, large-area ZnIn2S4 to CoS2, which acts as a co-catalyst due to its inherent conductivity and metallicity. The plasma-assisted generation of vacancies resulted in the formation of numerous exposed metal catalytic centers. Also, both the heterojunction and vacancy construction afforded a narrowed energy gap, an upregulated conduction band, and an enhanced carrier density, favoring electron injection during the electro-reduction process. Thus, an electrochemical platform was established using this material as an electrode substrate for furazolidone (Fz) detection, achieving a detection limit of 1.2 nM. The constructed platform was finally applied to evaluate Fz in actual samples of river water and urine, thanks to its good selectivity, high stability, and acceptable repeatability. In addition, in situ Fourier transform infrared technology was also used to monitor the electrocatalytic process. This work paves the way for preparing low-cost non-precious metal sulfides, which can be used as promising candidates for electrocatalysts in antibiotic testing.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
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2021
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IF 17.789
Xiaoyin Zhang,Guangjian Hu,Ke Chen,Linyun Shen,Ru Xiao,Pei Tang,Chenglin Yan,Hui-Ming Cheng,Zhenhua Sun,Feng Li
Severe shuttle effect of sulfur cathodes hinders commercial application of lithium-sulfur batteries. Current technologies for sulfur cathodes by physical confinement and chemical absorptions are not enough to solve the issues of the sulfur cathodes. Organosulfur cathodes with solid-solid conversions were proposed to fundamentally avoid shuttle effect. However, in previous reports, low sulfur content and complicated electrochemical process prevent application of organosulfur cathodes in lithium-sulfur batteries. Herein, we report new solid-solid conversion based on the organosulfur cathodes in ether-based electrolytes by developing sulfur-chain controlling strategy to obtain trisulfide polymers with high sulfur content over 76 wt%. Furthermore, reaction mechanism of sulfur-based cathodes is analyzed by constructing different sulfur chains based on the strategy. Theoretical calculations suggest polymers with disulfide bonds might exhibit new lithiation behavior, which is consistent with electrochemical results. This work demonstrates new electrochemical behavior of organosulfur cathode with solid-solid conversion and show promising application prospect of these polymers.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Zhan-Ku Li,Zheng-Zhi Zhang,Kai Zhang,Hong-Lei Yan,Jing-Chong Yan,Zhi-Ping Lei,Shi-Biao Ren,Zhi-Cai Wang,Shi-Gang Kang,Heng-Fu Shui
The migration behavior of organic/inorganic sulfurs is vital for producing high-quality metallurgical coke via pyrolysis. Herein, Lengquan (LQ) fat coal was separated into extract (LQE) and residue (LQR) via ultrasonic extraction, and migration behavior of extracted and residual sulfur as well as effects of LQE and LQR on sulfur removal from coke were further explored in pyrolysis process. The results indicate that LQE has higher volatiles, hydrogen and oxygen contents, while more ash and organic aromatic matrix were remained in LQR. The predominance of difficultly eliminated organic sulfurs in LQE and higher content of easily pyrolyzable inorganic sulfurs in LQR result in weaker and stronger desulfurization effect in pyrolysis, respectively. Sulfides, pyrites, and sulfates are relatively easy to be removed from coke, while sulfones, thiophenes, and sulfoxides are more thermally stable. In co-pyrolysis of LQ with LQE/LQR, the migration of various sulfurs, particularly thiophenes, from coke was significantly enhanced, and the maximum sulfur removal ratio of ca. 56% was achieved in LQ and LQE co-pyrolytic coke. LQE acts as hydrogen/oxygen radical donor and mass transfer promoter, while LQR serves as assistor for gaseous sulfur release, resulting in synergistic desulfurization in LQ with LQE/LQR co-pyrolysis.
研究领域:
煤炭科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
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