ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2013
·
IF 2.203
Hairong Tang,Xuezhi Zhou,Yingqiang Guan,Liming Zhou,Xinming Wang,Huijuan Yan
The decontamination of surfaces exposed to chemical warfare agents is an interesting scientific topic. The desorption behavior of bis(2-chloroethyl) sulfide (sulfur mustard, HD) from the surface of the HD-contaminated hardened cement paste (HCP) was investigated under different weather conditions, which should provide scientific reference data for protection and decontamination projects involving HD-contaminated HCP in different conditions. The desorption of HD from the surface of HCP wafers was studied, and the effects of the purge air flow rate , water content, sorption temperature, and substrate age were investigated. HD desorption was detected from the surface of HD-contaminated HCP, but the desorption velocity was relatively slow. The desorption quantity remained within an order of magnitude throughout a time span of 36 h (25 °C at 200 mL/min of purge air), and the amount of HD that was desorbed from each square meter of HCP surface was approximately 1.1 g (25 °C at 200 mL/min of purge air), which was approximately 5.5 percent of the total HD that was initially applied. A higher flow rate of the purge air, increased water content, and longer substrate age of HCP all increased the HD desorption. In contrast, increased temperatures suppressed HD desorption.
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高影响因子
Advanced Sustainable Systems
·
2023
·Vol. 7
·期 5
·2200473
·
IF 7.1
Jing Tang,Qingdong Ruan,Hongmin Yu,Chao Huang
Electrocatalytic water splitting generated oxygen (O 2 ) and hydrogen (H 2 ) is a promising way to solve the energy crisis. Oxygen evolution reaction (OER) compared to hydrogen evolution reaction (HER) has slow kinetics hindering overall process. Recently, cobalt hydroxide (Co(OH) 2 ) with high activity and stability for OER has attracted more attention. During the OER process, the Co 2+ in Co(OH) 2 is further oxidized to Co 3+ and CoOOH species are true active sites. However, the low conductivity of Co(OH) 2 hinders its oxidization to CoOOH. In addition, spontaneous growth of Co(OH) 2 agglomerates easily during hydrothermal treatment, leading to decreased active sites. Herein, an efficient strategy is developed to construct highly dispersive Co(OH) 2 nanosheets vertically grown on V 2 O 5 nanoflowers (Co(OH) 2 /V 2 O 5 ) at room temperature. The V 5+ of V 2 O 5 can oxidize Co 2+ of Co(OH) 2 into Co 3+ , resulting in in situ formations of CoOOH species favorable to the OER process. In situ Raman also investigates that the OH - species are inserted more easily into the interlayer of Co(OH) 2 of (Co(OH) 2 /V 2 O 5 ) than that of pure Co(OH) 2 . Therefore, the hybrid Co(OH) 2 /V 2 O 5 exhibits low overpotentials of 320 and 370 mV at a current density of 10 and 50 mV cm -2 , respectively, and a small Tafel slope of 68 mV dec -1 .
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JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xiangyang Song,Kexuan Han,Dechun Zhou,Pengfei Xu,Xiaomeng Xue,Peng Zhang
Tm 3+ doped Bi 2 O 3 -GeO 2 -Na 2 O glass samples were synthesized by conventional melt-quenching method. The Raman spectra measurements showed the maximum phonon energy of prepared glass is 794 cm −1 , which is considerably lower than silicate glasses . Based on the measured absorption spectra , Judd-Ofelt intensity parameters, spontaneous radiative transition probabilities and radiative lifetimes were calculated to elucidate the radiative properties of Tm 3+ in the presented glass. Intense near infrared emission around ~2 μm was obtained under the pump of 808 nm laser diode . A large stimulated emission cross section (5.51 × 10 −21 cm 2 at 1851 nm) of Tm 3+ : 3 F 4 → 3 H 6 was achieved in the prepared bismuth germanate glass doped with 1 mol% Tm 2 O 3 . Besides, the energy transfer processes among Tm 3+ were analyzed using the extended overlap integral method. These results indicate that the presented glass is a promising candidate for ~2 μm laser applications.
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高影响因子
LUMINESCENCE
·
2014
·Vol. 30
·期 2
·198-206
·
IF 1.675
Yaping Wang,Guowen Zhang
Di-(2-ethylhexyl) phthalate (DEHP) is widely used as a plasticizer in industrial production, but may have a potential health risk. In this study, the binding characteristics of DEHP with human serum albumin (HSA) in aqueous solution at pH 7.4 were determined using UV/vis absorption, fluorescence, Fourier transform infrared (FTIR) spectroscopy and circular dichroism (CD), along with a molecular simulation technique. Analysis of the fluorescence titration data at different temperatures suggested that the fluorescence quenching mechanism of HSA by DEHP was static. The calculated thermodynamic parameters indicated that hydrophobic forces played a predominant role in formation of the DEHP–HSA complex, but hydrogen bonds could not be omitted. Site marker competitive experiments and denaturation studies showed that the binding of DEHP to HSA primarily took place in subdomain IIA of HSA, and molecular docking results further corroborated the binding sites. The synchronous fluorescence, UV/vis absorption, FTIR and CD spectra revealed that the addition of DEHP induced changes in the secondary structure of HSA. Protein surface hydrophobicity (PSH) tests indicated that DEHP binding to HSA caused an increase in the PSH. Moreover, the effects of some metal ions on the binding constant of DEHP − HSA interaction were also investigated. Copyright © 2014 John Wiley & Sons, Ltd.
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BIOORGANIC CHEMISTRY
·
2025
·
IF 4.7
Lixin Niu,Yun He,Xing Zhang,Yanfei Peng,Ding Wang,Tao Wang,Zunting Zhang
A concise and efficient photo-induced rearrangement and oxidation of 2-(3-methylbenzofuran-2-yl)-3-phenyl-1 H -indoles 1 for the synthesis of 5-(2-hydroxyphenyl)-5-methyl-5,7-dihydro-6 H -benzocarbazol-6-ones 2 is described. Irradiation of compounds 1 in anhydrous dichloromethane solution, using 313 nm UV light in an air atmosphere, resulted in the formation of compounds 2 with yields ranging from 55% to 98%. Using the 6π-electrocyclization strategy of compounds 1 containing a methyl, a quaternary carbon stereocenter was introduced in the compounds 2 . The carbonyl group of compounds 2 was formed by the photo-induced oxidation of C-H bond to C-OH and hemiketal-keto tautomerization. Additionally, the antitumor activities of compounds 2 were evaluated and found to demonstrate equivalent or superior activity compared to Cisplatin against various tumor cell lines, including leukemia HL-60, lung cancer A549, liver cancer HepG2, breast cancer MDA-MB-231 and colon cancer SW480. The anticancer activity of compound 2f was particularly significant, with IC 50 values of 2.99, 9.06, 6.81, 9.29, and 14.93 μM respectively, and its IC 50 value of normal cells 11.18 μM. Compound 2k had a relatively high IC 50 values against cancer cells, whereas its IC 50 value greater than 40μM for normal cells.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Bin Zhang,Xiaodong Guo,Xin Feng,Xiaoxia Duan,Guilong Wang,Chao Yang
The debenzylation reaction of hexabenzylhexaazaisowurtzitane (HBIW) and 2,6,8,12-tetraacetyl-4,10-dibenzyl-2,4,6,8,10,12-hexaazaisowurtzitane (TADBIW) to synthesize 2,6,8,12-tetraacetyl-2,4,6,8,10,12-hexaazaisowurtzitane (TAIW) is the major challenge in the production of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW). This is primarily attributed to the reaction needing a lot of palladium catalysts, which tend to deactivate rapidly during the process. In this work, a series of Pd(OH)2/C catalysts were successfully prepared through a convenient deposition-precipitation method by controlling the flow rate of the PdCl2 solution. Employing the 10% Pd(OH)2/C–F0.5 sample, the debenzylation reaction was successfully completed with a lower usage of Pd and shorter time of reaction. For the HBIW debenzylation reaction, the yield of TADBIW was 87.4% at low temperature (25 °C) when 1‰ Pd/HBIW was used, and the higher yield was 89.8% at high temperature (45 °C) when 3‰ Pd/HBIW was used. The TADBIW/Pd/h values of them were 42.5 and 95.7, respectively. For the TADBIW debenzylation reaction, the complete conversion of the reactant was realized when Pd/TADBIW was 2‰. The value of TAIW/Pd/h was 154.6 when Pd/TADBIW was 4‰, which was higher than the reports. Compared to the reported catalysts, the dosage of Pd used in the debenzylation reactions of HBIW and TADBIW was significantly decreased. Furthermore, the 10% Pd(OH)2/C–F0.5 sample was recycled six times with similar performance, demonstrating excellent stability. Based on the analysis of characterization results, it is effortless to find that the flow rate of the PdCl2 solution plays a key role in controlling the adsorption behavior of palladium species on activated carbon. The lower flow rate is beneficial to obtaining Pd nanoparticles with a smaller size, a higher proportion of Pd2+, and a higher metal distribution. This study may provide a simple way to develop palladium catalysts with high performance for related applications.
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高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Weiyou Zhou,Jiayin Huang,Anwei Wang,Jia Cui,Jie Yao,Tao Hou,Shuliang Ji,Mingyang He,Zhonghua Sun
An efficient heterogeneous catalytic system for the [4 + 2] annulation reactions between tertiary anilines and tetrahydrofuran has been developed based on CuCoFe layered double oxide in the study. Cu + species was believed to play the crucial role in the catalytic transformation, and synergistic effect between Cu and CoFe species was observed in the reaction. Various tertiary anilines could be tolerated by the present catalytic system. A series of control experiments were conducted to determine the reaction intermediates. A distinctive reaction mechanism has been described for the annulation reaction based on these results and kinetic isotopic effects experiments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shuaiyang Jiang,Ya Liu,Yulu Liu,Dongfang Wang,Xiaofeng Wang,Qian Li
A portable home hemodialysis device is a miniaturized and easy-to-operate medical apparatus designed for patients with chronic kidney disease, enabling them to conveniently perform hemodialysis at home or while traveling. However, it imposes high requirements on the dialysis membrane in terms of dialysis efficiency, adsorption capacity, and blood compatibility. In this study, the composite membrane was fabricated through electrospinning, which is an in situ synthesis of carbon nano tube (CNT) bridged UiO 66 (COOH) 2 on PTFE fibers. UiO 66 (COOH) 2 increased the adsorption site by association with CNT, and achieved the adsorption of creatinine by hydrogen bond and π bond, which greatly reduced the usage of dialysis solution. UiO 66 (COOH) 2 and CNT were first combined for creatinine adsorption, and its maximum static adsorption capacity was 66 mg/g. During the dialysis, the yielding membrane showed a creatinine clearance of 64.89% and a resistance protein rate of more than 98%. Compared with pure PTFE dialysis membrane, the amount of dialysate used to achieve the same dialysis effect was merely 1/10. Furthermore, the membrane has a hemolysis rate of 2% and a low platelet adhesion rate, which shows excellent blood compatibility. Therefore, the dialysis membrane prepared in this study is expected to promote the development of portable home hemodialysis devices.
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高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Yuqing Wang,Miao Jiang,Tian Tian,Zhao Sun,Gangqiang Wu,Yanming Wang,Xiaohui Guo,Wenxiu He,Jian Ding,Li Yan,Yunjie Ding
The development of earth-abundant catalysts with high activity and selectivity is important yet challenging in hydroformylation. In this work, a stable and efficient phosphine-oxide group containing porous organic polymer was afforded, which served as a ligand and a support to fabricate a heterogeneous Co catalyst (Co/POL-POPh 3 ) for hydroformylation of 2-octene under mild condition. A 2-octene conversion of 94.6 % and at least three recycles were achieved using Co/POL-POPh 3 in the hydroformylation with a 51.1 % aldehyde selectivity under 423 K and 3.0 MPa. The experimental and characterization results elucidated that the highly dispersed Co ions was coordinated with the phosphine-oxide groups in the polymer, which was beneficial for the 2-octene isomerization and in turn led to the excellent performance for synthesis of oxygenates. Furthermore, a reaction mechanism was also suggested for 2-octene hydroformylation over the Co/POL-POPh 3 catalyst. The current study delivers valuable insights into the adjustment of the catalytic efficiency of non-previous metal catalysts in the heterogeneous hydroformylation of internal olefins.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Huanjun Su,Weili Shi,Yumeng Zhang,Ying Lin,Yani Liu
Mg3Sb2 Zintl compounds have emerged as promising thermoelectric materials due to their favorable electronic structures and low lattice thermal conductivity. However, strong carrier scattering, including ionized impurity and grain boundary scattering, suppresses mobility and limits the power factor. This study reveals that Zn doping plays a crucial role in tuning carrier scattering mechanisms in n-type Mg3(Sb,Bi)2. The substitution of Mg with Zn weakens ionized impurity scattering, facilitating charge transport and increasing carrier mobility from ∼72 to ∼135 cm2 V–1 s–1. As a result, a high power factor of ∼2089 μW m–1 K–2 is achieved at 573 K in Mg3.155Zn0.045Sb1.5Bi0.49Te0.01. Furthermore, Zn incorporation introduces localized lattice distortions and promotes the formation of high-density dislocations, which intensify phonon scattering and significantly suppress lattice thermal conductivity to ∼0.54 W m–1 K–1 at 773 K. These synergistic enhancements contribute to an optimized thermoelectric performance, yielding a peak ZT of 1.71 at 773 K and an average ZT of 1.21. The estimated conversion efficiency reaches 13% under a 470 K temperature gradient, highlighting Zn doping as an effective strategy for advancing Mg3(Sb,Bi)2-based thermoelectric materials toward high-temperature energy harvesting applications.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Tong Yu,Juan Qian,Guangyao Zhang,Xiaoran Zhang,Feichao Han,Jiangsheng Liu
This investigation innovatively develops a water-lean blended amine system through multidimensional performance evaluation and reaction mechanism elucidation. The experimental protocol commenced with screening MAE (2-(Methylamino)ethanol) blended with five organic amines, where M15D15 (15 wt% MAE + 15 wt% DETA) and M15A15 (15 wt% MAE + 15 wt% AEEA) emerged as prime candidates due to their exceptional cyclic capacity and rapid desorption kinetics, respectively. Subsequent phase behavior optimization via n-propanol (PrOH) incorporation revealed critical solvent composition effects. The optimized M15D15P45 formulation (MAE/DETA/PrOH = 15:15:45 wt%) demonstrated remarkable capability metrics: 81.2 % enhancement in CO 2 absorption capacity and 129 % improvement in cyclic capacity compared to benchmark 30 wt% MEA aqueous solution, with regeneration energy consumption reduced to 2.05 GJ·t −1 CO 2 . Post six absorption–desorption cycles, the system retained 95.2 % initial capacity, showcasing exceptional stability. 13 C NMR spectral analysis confirmed PrOH’s dual functionality as both phase separation promoter and active reaction participant through carbamate formation. Kinetic profiling further revealed MAE’s superior regeneration responsiveness over DETA. In conclusion, the M15D15P45 absorbent system demonstrates excellent regeneration capability and outstanding stability, with significant potential for future development.
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高影响因子
MOLECULES
·
2019
·Vol. 24
·期 3
·420
·
IF 3.06
Bang-Jin Wang,Ai-Hong Duan,Jun-Hui Zhang,Sheng-Ming Xie,Qiu-E Cao,Li-Ming Yuan
Porous organic cages (POCs) have attracted extensive attention due to their unique structures and tremendous application potential in numerous areas. In this study, an enantioselective potentiometric sensor composed of a polyvinyl chloride (PVC) membrane electrode modified with CC3-R POC material was used for the recognition of enantiomers of 2-amino-1-butanol. After optimisation, the developed sensor exhibited enantioselectivity towardS-2-amino-1-butanol (logKS,RPot= −0.98) with acceptable sensitivity, and a near-Nernstian response of 25.8 ± 0.3 mV/decade within a pH range of 6.0–9.0.Keywords:enantioselective potentiometric sensor;2-amino-1-butanol;chiral porous organic cage;CC3-R;PVC membrane electrode
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高影响因子
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