CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Wenjie Zhang,Xian Xie,Xiong Tong,Shengdong Zhang,Yunpeng Du,Yang Cao,Dongxia Feng
The extraction kinetics of lanthanum (III) from a chloride medium by bis(2-ethylhexyl) phosphate(HDEHP) and dimethylheptyl methyl phosphate(P350) in the presence of sulfonated kerosene are investigated using a Lewis cell. The effects of the stirring rate, temperature, and specific interfacial area on the extraction rate are investigated. The results show that the extraction process is controlled by diffusion and chemical reactions in the interfacial area rather than in the bulk phase. The apparent activation energy and the changes in the enthalpy, entropy, and Gibbs free energy of the extraction reaction are calculated using the Arrhenius equation and transition state theory. The rate equation derived from the experimental results is similar to that of the interface reaction model. A mass transfer model with a rate-control step is proposed. This study provides guidance and data support for an HDEHP-P350 system in industrial production applications.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 9
·697
·
IF 4.3
Yuanqi Peng,Lezhu Su,Meng Liu,Chen Zeng,Bo Xiang,Zhuoyao Xie,Zijing Hu,Nan Zhou
The development of green, efficient, and stable pesticides for controlling agricultural pathogens remains a critical research focus. Elemental sulfur, although widely used for its bactericidal and insecticidal properties, suffers from aggregation, poor dispersibility, and limited contact with target organisms, restricting its effectiveness. In this study, we synthesized a novel biochar–sulfur composite by combining sustainable biochar with sulfur at low temperatures. The resulting material exhibited enhanced dispersibility and a five-fold increase in bactericidal efficacy compared to sulfur alone, as demonstrated in tests againstR. solanacearumandE. coli. Additionally, the composite maintained 80% efficacy after five cycles of use, highlighting its favorable cyclic performance. Mechanistic studies revealed that biochar accelerates sulfur’s redox reaction, generating free radicals that drive efficient bactericidal action. This work provides a simple and sustainable approach for developing sulfur-based antimicrobial pesticides, offering new opportunities for sulfur utilization in agriculture.
研究领域:
农业科学
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微生物学
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DOI
PubMed
高影响因子
PHARMACEUTICAL BIOLOGY
·
2021
·
IF 3.503
Hongyan Ma,Shanshan Liu,Wenshan Qu,Qi Huang,Linyuan Li,Fujiang Chu,Yuyun Zhu,Xinlin Lv,Zhimin Wang,Jingjing Zhu
Context The traditional drying method, sun drying, for Chrysanthemum morifolium Ramat. cv. Hang-ju (Compositae) (HJ) is widely replaced by sulphur fumigation (SF), which has an unknown effect on its efficacy.Objective To investigate protective effects of nonfumigated HJ (NHJ) and sulphur-fumigated HJ (SHJ) water extracts against oxidative stress and lipid peroxidation.Materials and methods Sprague-Dawley rats were administered high-fat diet to induce hyperlipidaemia and randomly divided into eight groups (n = 6): control, fenofibrate, NHJ and SHJ extracts (1, 2 or 4 g crude drugs/kg/d; intragastric administration for 8 weeks). Serum total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), superoxide dismutase (SOD) and malondialdehyde (MDA) levels were detected. Human umbilical vein endothelial cells (HUVECs) were treated with NHJ and SHJ extracts (50, 100 or 200 μg/mL) for 24 h, followed by oxidized low-density lipoprotein (ox-LDL, 20 μg/mL) for 2 h in vitro. Cellular reactive oxygen species (ROS), SOD and MDA levels and apoptosis were evaluated.Results NHJ was more effective than SHJ in decreasing serum TG, TC, LDL-C, LDL/HDL and MDA while increasing serum HDL-C and SOD levels at high doses. SHJ (IC50=19.9 mg/mL) suppressed HUVEC growth stronger than NHJ (IC50=186.7 mg/mL). At 200 μg/mL, NHJ was more effective than SHJ in downregulating ROS and MDA levels, reducing HUVECs apoptosis rate and elevating SOD activity in ox-LDL-treated HUVECs.Conclusions SF causes oxidative damage and attenuates antioxidative activity in ox-LDL-treated HUVECs, which promotes lipid peroxidation. SF is not recommended for processing HJ.
研究领域:
药理学
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植物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2022
·
IF 3.571
Qiong Ge,Shan-Shan Zhou,Ni-Na Xie,Ming Kong,Jin-Di Xu,He Zhu,Jing Zhou,Song-Lin Li,Hong Shen
Atractylodis Macrocephalae Rhizoma (AMR) is one of commonly used medicinal and edible herbs in China. It is often sulfur-fumigated during post-harvest processing. Carbohydrates are important active components of AMR. However, it is unknown whether sulfur-fumigation would induce changes on carbohydrates. Here, carbohydrates including polysaccharides , oligosaccharides and free monosaccharides were comprehensively analyzed to characterize the quality changes of sulfur-fumigated AMR. Determination of both homemade sulfur-fumigated AMR samples and commercial samples from market revealed that sulfur-fumigation did not affect molecular weight distribution of polysaccharides , but altered polysaccharides content and its ratios of constituent monosaccharides , especially glucose (Glc) and fructose (Fru), as well as the contents of oligosaccharides DP2–10 and free monosaccharide Fru. Moreover, the variations enhanced with the increasing of residual SO 2 content. The potential transformation mechanisms could be due to the hydrolysis of polysaccharides. The research outcomes could provide a chemical basis for the safety and efficacy evaluations of sulfur-fumigated AMR.
研究领域:
中药学
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植物化学
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产品关联
DOI
PubMed
高影响因子
ACS Omega
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2022
·
IF 4.132
Jiaqi Guo,Zhangdi Lu,Chenmin Li,Yuming Miao,Bingbing Zhang,Jacky W. Y. Lam,Yu-e Shi,Zhenguang Wang,Ben Zhong Tang
Elemental sulfur is not traditionally considered as an afterglow material, even though it can be endowed with fluorescence properties through processing it into nanodots. Herein, we discovered that elemental sulfur powder could emit room temperature phosphorescence (RTP) with a lifetime of 3.7 ms. A long-lived (>12 s) afterglow emission at 77 K could also be observed by the naked eye. Detailed investigations suggested that such a special phenomenon was attributed to impurity-related traps coupled with conduction and valence bands. After the sulfur is processed into nanodots, the rigid environment formed by the cross-linking of the surface ligands could stabilize the excited charges from quenching. This results in the promotion of RTP intensity and lifetime to achieve an emission lifetime of 200 ms. These results confirm the unique RTP of elemental sulfur powder, and also suggest the potential of sulfur-based materials as versatile components for the development of RTP materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 16
·48594
·
IF 2.188
Rui Wang,Yao Xiao
In this study, we prepared monosultap microcapsules in an inverse emulsion through interfacial polymerization for the first time. The microcapsules are spherical pellets with intact and smooth shell and have a narrow particle size distribution with an average size of about 2.35 μm. More importantly, our microcapsules have excellent thermal stability with a starting decomposition temperature of 233.1 °C, high encapsulation efficiency of 81.9% as well as long-term slow release of monosultap under different conditions. In addition, the shell of the microcapsules can degrade completely in the natural condition, avoiding the pollution to the environment. It can be believed that our microcapsules will show good service performance if employed in agricultural industry. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48594.
研究领域:
材料科学
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农业科学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
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2023
·
IF 8.1
Liangliang He,Huifang Duan,Xintong Chen,Yuanshan Chen,Qingmei Mo,Junqing Huang,Huinan Zhao,Xinsheng Yao,Jiaxu Chen,Zhihong Yao
Dried ginger, a well-known medicine and food homologous production, has been widely circulated in China with high health benefits and economic value. Currently, there is still a lack of quality assessment on whether dried ginger in China exhibits chemically and biologically distinct properties, which creates a barrier to its quality control in commercial circulation. In this study, the chemical characteristics of 34 batches of common dried ginger samples in China were first explored using non-targeted chemometrics based on the UPLC-Q/TOF-MS analysis, leading to the identification of 35 chemicals that contributed to clustering into two categories, with sulfonated conjugates being the key chemically distinct components. By comparing the samples before and after sulfur-containing treatment and the further synthesis of a key differentiating component of [6]-gingesulfonic acid, it was then demonstrated that sulfur-containing treatment was the primary cause of the formation of sulfonated conjugates, as opposed to regional or environmental factors. Furthermore, the anti-inflammatory efficacy of dried ginger with high presence of sulfonated conjugates was significantly decreased. Consequently, for the first time, UPLC-QqQ-MS/MS was used to develop a targeted quantification method for 10 characteristic chemicals in dried ginger, allowing researchers to quickly determine whether dried ginger has been processed with sulfur and quantitatively evaluate the quality of dried ginger. These results provided an insight into the quality of commercial dried ginger in China and a suggested method for its quality supervision as well.
研究领域:
中药学
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分析化学
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药理学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 35
·18098-18104
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IF 7.443
Xiaogang Li,Mumin Rao,Haibin Lin,Dongrui Chen,Yanlin Liu,Shizhu Liu,Youhao Liao,Lidan Xing,Mengqing Xu,Weishan Li
We report a composite (CG-S@PANI), sulfur (S) loaded in curved graphene (CG) and coated with conductive polyaniline (PANI), as a cathode for lithium–sulfur batteries. CG is prepared by splitting multi-wall carbon nanotubes and loaded with S via chemical deposition and then coated with polyaniline via in situ polymerization under the control of ascorbic acid. The physical and electrochemical performances of the resulting CG-S@PANI are investigated by nitrogen adsorption–desorption isotherms, X-ray powder diffraction, thermogravimetric analysis, transmission electron microscopy, electrochemical impedance spectroscopy, charge–discharge tests, and electronic conductivity measurements. CG-S@PANI as a cathode for lithium–sulfur batteries delivers an initial discharge capacity of 851 mA h g−1 (616 mA h g−1 on the basis of the cathode mass) at 0.2 C with a capacity retention of over 90% after 100 cycles. This nature is attributed to the co-contribution of CG and conductive PANI to the concurrent improvement in electronic conductivity and chemical stability of the sulfur cathode.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Qun Lu,Aimin Sha,Wenxiu Jiao,Ke Shi,Ze Peng,Ruimeng Song
In response to the growing demand for energy-efficient and sustainable materials in road construction, this research presents a pioneering method to enhance the engineering application of bio-oil rejuvenated asphalt . Initially, aged asphalt was rejuvenated by blending with 6% castor oil . Subsequent modifications included introducing varying concentrations of polyphosphoric acid (PPA) (0%, 0.5%, 1.0%, 1.5%), combined with differing sulfur levels (15% and 30%). The rheological properties of the resulting asphalt binders were assessed using rotational viscometer (RV), asphalt binder crack device (ABCD), and dynamic shear rheometer (DSR) tests, while fourier transform infrared spectroscopy (FTIR) test was employed to reveal the interaction mechanism. The study’s key findings reveal that incorporating 15% sulfur significantly reduces asphalt viscosity , effectively lowering the mixing and compaction temperatures by approximately 17 °C and 15 °C, respectively. Besides, rutting factor ( G * / sin δ ) and fatigue life ( N f ) results unveil a positive connection between PPA content, high-temperature stability, and fatigue resistance. Furthermore, the grey relational analysis emphasizes a strong correlation between G * / sin δ and R 3.2 (grey relational degree of 0.986), indicating that the recovery rate partially reflects high-temperature performance. The FTIR analysis demonstrates that bio-oil primarily contributes through physical blending, whereas PPA undergoes chemical transformations, and the combination of sulfur with asphalt results in both physical and chemical reactions. In conclusion, this research emphasizes the synergistic potential of bio-oil, sulfur, and PPA in enhancing recycled asphalt performance. For optimal warm mix efficiency and road performance, incorporation of 15% sulfur and 1.0% PPA in bio-rejuvenated asphalt is recommended. These findings provide substantial advantages in reducing reliance on petroleum asphalt and mitigating carbon emissions , contributing to sustainable infrastructure development.
研究领域:
土木工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 17
·期 4
·987-992
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IF 2.131
Geng Xiuyu,Rao Mumin,Li Xiaoping,Li Weishan
A facile method is developed for homogeneous dispersion of sulfur (S) nanoparticles in multi-walled carbon nanotubes (MWCNTs). The process involves the modification of MWCNTs via oxidation catalyzed by acid and the introduction of sulfur nanoparticles into the MWCNTs through direct precipitation. The resulting sample (precipitated S/MWCNTs) is characterized with scanning electron microscopy and thermogravimetric analysis, and its performance as cathode of lithium/sulfur battery is investigated with a comparison of the sample prepared by ball-milling (ball-milling S/MWCNTs). It is found that the precipitated S/MWCNTs exhibit better battery performance than the ball-milling S/MWCNTs. The initial discharge capacity is 1,299 mA h g −1 for the precipitated S/MWCNTs but only 839 mA h g −1 for ball-milling S/MWCNTs at 0.02 C. The capacity remains 800 mA h g −1 for the precipitated S/MWCNTs but only 620 mA h g −1 for ball-milling S/MWCNTs at 0.05 C after 50 cycles. The better performance of the precipitated S/MWCNTs results from the improved uniformity of S dispersed in MWCNTs through precipitation.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Leicheng Zhang,Chen Zhao,Maochun Wu,T.S. Zhao
We demonstrate an energy-dense, flowable electroactive material by suspending solid sulfur hosted in hollow carbon nanoshells (HCSs) in a liquid electrolyte without extra conductive additives for the pursuit of high-energy-density semi-solid flow batteries . Compared to conventionally used Ketjen Black (KB) additives, the conductive HCSs can confine the insulating active materials within their void space, while maintaining the electroactivity of the outer surface. More importantly, the liquid suspension of well-dispersed HCS/S nanoparticles shows much lower viscosity than that formed by aggregated KB particles with a hyperbranched structure. The cell with the liquid suspension paired with Li metal achieves an average volumetric capacity of ~80 Ah L −1 over 50 stable cycles in the static test and an energy density of 230 Wh L −1 in the intermittent flow test. Our energy-dense HCS/S suspension with high flowability shows great potential for high-energy-density energy storage systems .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Plant Science
·
2023
·
IF 5.6
Yuanyuan Li,Yang Liu,Changjie Wu,Rui Zhao,Minghua Li,Jing Cai,Li Ma,Xiongkui He,Xuemin Wu,Zhang Zhenhua
Introduction Adjuvants can effectively enhance the utilization rate of pesticides, but the application of adjuvants in plant growth regulators is rarely studied. Methods This work explored the effects of adjuvants dioctyl sulfosuccinate sodium salt (AOT) and methyl oleate (MO) on lime sulfur (LS), especially the drop behavior on flower and paraffin surface. Results The results showed that the addition of AOT and AOT+MO can significantly reduce the static and dynamic surface tension of LS from 72mN/m to 28mN/m and 32mN/m respectively, and increase the spreading factor from 0.18 to 1.83 and 3.10 respectively, reduce the bounce factor from 2.72 to 0.37 and 0.27 respectively. The fluorescence tracer test showed that the addition of adjuvants could promote the spreading and permeation of droplets. The field test results revealed that the flower thinning rate of adjuvant and non-adjuvant were 80.55% and 54.4% respectively, and the flower thinning effect of adding adjuvant was the same as that of artificial which the flower thinning rate was 84.77%. The quality of apples treated with adjuvants was similar to that treated with artificial, and the weight of single fruit increased by 24.08% compared with CK (spray water). Discussion The application of tank-mixture adjuvant could reduce the dosage of LS for thinning agent application, improve apple’s quality, and decrease labor cost and improve the economic benefits of fruit planting and the environmental benefits of plant growth regulators.
研究领域:
植物保护
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农业科学
✓ 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）