PETROLEUM SCIENCE AND TECHNOLOGY
·
2016
·
IF 0.418
Jing-Jing Li,Fei Zhou,Xiao-Dong Tang,Fang Wang,Na Hu
An electrochemical oxidation−distillation method with constant current 500 mA was proposed to reduce the sulfur content in gasoline in this work. After electrochemical oxidation−distillation, the sulfur content of gasoline decreased from 514.65 to 10.20 μg/g. On the basis of these experimental results, an oxidation mechanism of electrochemical oxidative desulfurization for gasoline was proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 6
·4803-4809
·
IF 3.84
Jing-jing Li,Fei Zhou,Xiao-dong Tang,Tao Hu,Jin Cheng
With the increasing awareness of environmental protection, deep desulfurization of methyl tert-butyl ether (MTBE), which is the most important octane booster in gasoline, is extremely urgent. Herein, a new desulfurization method, involving the combination of electrochemical oxidation and distillation, is proposed to reduce the sulfur content in MTBE. Under optimum operating conditions, the sulfur content of real MTBE decreases from 132.5 μg g−1 to 2.3 μg g−1 and the desulfurization efficiency reaches 98.25%. The oxidation products with high boiling points can be separated by distillation. FTIR analyses prove that electrochemical oxidation has no influence on the main properties of MTBE. Moreover, GC/MS is used to study the conversion of model organic sulfides (dimethyl disulfide, diethyl sulfide and butyl mercaptan) in the electrochemical oxidative desulfurization process. Finally, the possible reaction mechanism of the electrochemical oxidative desulfurization of MTBE is proposed.
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
Energy Storage Materials
·
2021
·
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
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 24
·期 8
·1988-1997
·
IF 5.317
Shao-Zhong Zeng,Yuechao Yao,Lin Huang,Hongliang Wu,Biaolin Peng,Qi Zhang,Xiaohua Li,Liang Yu,Shiyu Liu,Wenxuan Tu,Tongbin Lan,Xierong Zeng,Jizhao Zou
Graphical Hollow carbon nanospheres (HCNs) with specific surface areas up to 2949 m 2 g -1 and pore volume up to 2.9 cm 3 g -1 were successfully synthesized from polyaniline-co-polypyrrole hollow nanospheres by carbonization and CO 2 activation. Owing to their large inner cavity and enclosed structure, HCNs are desirable carriers for encapsulating sulfur. Hollow carbon nanospheres (HCNs) with specific surface areas up to 2949 m 2 g −1 and pore volume up to 2.9 cm 3 g −1 were successfully synthesized from polyaniline-co-polypyrrole hollow nanospheres by carbonization and CO 2 activation. The cavity diameter and wall thickness of HCNs can be easily controlled by activation time. Owing to their large inner cavity and enclosed structure, HCNs are desirable carriers for encapsulating sulfur. To better understand the effects of pore characteristics and sulfur contents on the performances of lithium-sulfur batteries, three composites of HCNs and sulfur are prepared and studied in detail. The composites of HCNs with moderate specific surface areas and suitable sulfur content present a better performance. The first discharge capacity of this composite reaches 1401 mAh g −1 at 0.2 C. Even after 200 cycles, the discharge capacity remains at 626 mAh g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 24
·10959-10970
·
IF 3.591
Sethupathi Shanmugasundaram,Hairus Abdullah,Noto Susanto Gultom,Hardy Shuwanto,Dong-Hau Kuo
Hydrogen is an inevitable energy source to replace fossil fuels in the future. Herein, we report Ni-doped ZnIn2(O,S)4/In(OH)3 heterojunction composites with different sulfur contents to support green hydrogen gas evolution. A simple one-step hydrothermal preparation process was carried out by simultaneously adding all chemical precursors during the synthesis of composites. The as-prepared composites were carefully characterized by XRD, FE-SEM, TEM, XPS, DRS, TPC, MS, EIS and CV techniques, which confirmed their performance in the hydrogen evolution reaction (HER) under visible-light illumination. With increasing sulfur content, XRD analysis indicated the gradual formation of Ni-doped ZnIn2(O,S)4 co-existing with the In(OH)3 phase. The highest hydrogen evolution rate of 2100 μmol g−1 h−1 under visible-light illumination was achieved in the presence of the Ni-doped ZnIn2(O,S)4/In(OH)3 composite. Its excellent photocatalytic performance is related to the good separation of photocarriers. XPS analysis suggests the formation of positively and negatively charged defects on catalyst surfaces which attract the photogenerated electrons and holes, respectively, thus leading to an extended photocarrier lifetime. Furthermore, the coupling effect with In(OH)3 provides a more positive conduction band (CB) relative to that of the Ni-doped ZnIn2(O,S)4 phase for facile electron transfer. A plausible HER mechanism based on the experimental data is proposed in this work.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.07
Shuiquan Chen,Shuo Sun,Chaocheng Zhao,Qiyou Liu,Meng Zang
The biodesulfurization capacity of Gordonia sp. SC-10 in a biphasic reaction system was investigated in this study. Model oil containing dibenzothiophene was used as the sole sulfur source of bacterium. The results showed that 81.43% of the sulfur in model oil with initial sulfur content of 174 mg/l could be removed within 5 days. Gordonia sp. SC-10 had high desulfurization rate for model oils with low sulfur contents, which would reduce sulfur concentration to below 5 mg/l. Biodesulfurization process might be a potential method to obtain fuels with ultra-low sulfur contents.
研究领域:
环境生物学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Powder Materials
·
2021
·
IF 0
Mengqin Gao,Wan-Ying Zhou,Yu-Xue Mo,Tian Sheng,Yanhong Deng,Liezun Chen,Kai Wang,Yanliang Tan,Haiqing Zhou
Here we proposed a novel approach to greatly enhance the electrochemical performance of Li–S batteries by designing a composite electrode material composed of a core-shell structure of S@Pt composite (sulfur content, 85%) grown on the S surface. The platinum (Pt) nanosheets provide physical barrier and strong chemical binding to anchor LiPSs and improve the electronic conductivity of S. Significantly, by introducing carbon nanofibers (CNFs) as the interlayer, we achieved outstanding Li–S battery with a high initial discharge capacity of 1040 mAh g −1 at 1.0 C and a reversible capacity of 742 mAh g −1 after 350 cycles, demonstrating its excellent long-term cycling stability with a low capacity decay rate of 0.08% per cycle. According to the density functional theory (DFT) calculations, we proposed that the superior performance is attributed to the cooperative effects of the strong interfacial interaction between Pt (111) surface and the S 8 molecule, and very low reaction energy of decomposition, −6.4 eV.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
Aggregate
·
2023
·Vol. 4
·期 6
·e387
·
IF 18.8
Dengfeng Yang,Wei Zheng,Ping Huang,Meiran Zhang,Wei Zhang,Zhiqing Shao,Wen Zhang,Xiaodong Yi,Xueyuan Chen
Lanthanide (Ln 3+ ) oxysulfide nanocrystals (NCs) have great prospect in many advanced technologies; however, they suffer from a low photoluminescence efficiency due to the volatility of sulfur and deleterious surface quenching effect. Herein, we report a novel sandwiched luminescent heterostructure based on Ln 3+ -doped Gd 2 O 2 S@NaYF 4 core/shell NCs with tunable sulfur content in the sandwich layer. By means of Eu 3+ as the sensitive structural probes, we unravel the ligand-mediated structure control of the NCs from Gd 2 O 3 : Ln 3+ @NaYF 4 to Gd 2 O 2 S: Ln 3+ @NaYF 4 with tailored S 2– deficiency. Such a sandwich-type core/shell heterostructure enables us to achieve efficient and multicolor downshifting and upconversion luminescence (UCL), with up to 208.8 folds of enhancement in UCL intensity as compared to that of their core-only counterparts. These findings provide a general approach for the controlled synthesis of lanthanide oxysulfide@fluoride heterostructure, which offers a new way for the materials design towards diverse emerging applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Jingyu Lei,Huichao Lu,Jiahang Chen,Jun Yang,Yanna Nuli,Jiulin Wang
S@pPAN has become promising cathode materials in rechargeable batteries due to its high compressed density, low E/S ratio, no polysulfide dissolution, no self-discharge, and stable cycling. However, it is a big challenge to enhance its sulfur content which determines its practical specific capacity. Herein, we prepare crosslinked PAN as precursor, leading to effective enhancement of sulfur content up to 55 wt% and a reversible specific capacity of 838 mAh g -1 composites at 0.2C. Because of the microporous structure and high specific area, crosslinked PAN provides more space to accommodate sulfur molecule and improve the interfacial reaction of S@pPAN as well. This work provides a promising direction to design S@pPAN for lithium sulfur batteries with high energy density.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Leiqian Zhang,Lingfeng Ge,Guanjie He,Zhihong Tian,Jiajia Huang,Jingtao Wang,Dan J.L. Brett,Johan Hofkens,Feili Lai,Tianxi Liu
The development of effective rechargeable potassium–sulfur (K–S) batteries has been retarded by a severe polysulfide shuttle effect and low sulfur content in the cathode (generally less than 40 wt %). Herein, a series of sulfur-linked polymers with different numbers of allyloxy linkers have been chosen to explore their effect on the performance of K–S batteries. By taking sulfur-linked tetra(allyloxy)-1,4-benzoquinone polymer (poly(S4-TABQ)) as the cathode of K–S batteries, its maximal sulfur content reaches ∼71 wt %, which displays a high capacity retention of 94.5% after 200 cycles (only 0.027% loss per cycle). Theoretical analyses and density functional theory calculations show that the abundant allyloxy linkers in poly(S4-TABQ) cathodes play a vital role in inhibiting the polysulfide shuttle effect and realizing high capacity, owing to the strong interaction of the allyloxy moieties with potassium polysulfides and the accelerated charge transfer during charge/discharge process. Moreover, ex situ X-ray photoelectron spectroscopy and ultraviolet–visible spectroscopy analysis are conducted to explore the electrochemical mechanism in poly(S4-TABQ) cathodes, indicating that −C-Sn–·K+ (n = 2–6) and K2Sn (n = 2–6) coexist in K–S batteries without the formation of K2S groups. This study provides a novel insight into the application of sulfur-linked polymers as cathode material in potassium–sulfur batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 6
·1397-1404
·
IF 2.646
Yang Rong,Gong Sheng-min,Zhao Shang-qian,Zhao Chun-rong,Zhu Xiu-long,Sun Hao-bo,Zhang Li
S@CNT-G-TiN multi-dimensional composite materials with above 90 wt.% sulfur content were successfully synthesized via a facile suspension deposition method. The as-prepared S@CNT-G-TiN composite materials delivered an excellent initial specific capacity of 1291 and 642 mAh/g at 0.1 C and 3 C, respectively. The S@CNT-G-TiN cathode with 7.5 mg/cm 2 sulfur loading exhibited a reversible areal capacity of 7.7 mAh/cm 2 after 100 cycles, which proved that the S@CNT-G-TiN cathode was favored for the construction of high sulfur loading Li-S batteries. The superior electrochemical performance could be attributed to the specific CNT-G-TiN host, which provide a conductive network in the electrode and suppress the shuttle effect of lithium polysulfides (LiPSs). 5 Ah Li-S pouch cell was also fabricated by using the S@CNT-G-TiN cathode, which exhibited high-energy density of 401 Wh/kg and retained a stable cycling performance with an average capacity fading of 0.2% per cycle after 50 cycles, indicating the potential applications of S@CNT-G-TiN composite materials in high-performance Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
复合材料设计
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Dongyuan Lei,Jinkui Li,Mingwu Xiang,Zirui Zhao,Shixun Yang,Zhe Hu,Mingwei Yuan,Junming Guo,Yi Xia,Wei Bai
Low sulfur content and inevitable polysulfide shuttle effect have always been the critical obstacle of the practical application of high-energy–density lithium sulfur batteries. Herein, a waste passiflora edulis peel derived in-situ N -doping porous carbon (PINPC) combined with three-dimensional hollow carbon cloth interlayer (3DHCI) was designed and constructed by facile simultaneous activation/carbonization. The abundant porous structure and nitrogen heteroatom doping of the PINPC not only significantly confine the soluble polysulfides through the physical and chemical adsorption, but also the high conductivity of the 3DHCI effectively accelerate the conversion reaction of polysulfides encapsulated in the unique hollow carbon skeletons. Owing to the synergetic enhancement of the PINPC and 3DHCI, the sulfur contents of the corresponding sulfur cathode composites are easily regulated from 70 wt% to 95 wt%, whilst exhibiting excellent electrochemical performances. The PINPC/S with a sulfur content of 70 wt% and 3DHCI interlayer obtains a high initial discharge capacity of 1032 mAh·g −1 and then retains 954 mAh·g −1 at 0.2 C after 200 cycles. At 2 C, a durable cycle life with capacity retention of 86% can be achieved up to 500 cycles. Even with an ultrahigh sulfur content of 95 wt%, the relatively high initial discharge capacity of 692 mAh·g −1 and capacity retention of 96 % are also achieved at 0.2 C after 200 cycles. This work offers a potential design for high-performance lithium sulfur batteries simultaneously with a high sulfur content.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）