CHINESE CHEMICAL LETTERS
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2016
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IF 1.947
Ting-Ting Zhang,Jing-Yang Jiang,Yan-Hua Wang
Various supported Pt-Pb bimetallic catalysts were prepared and applied for the catalytic conversion of nitrobenzene to p -aminophenol in the environmentally benign pressurized CO 2 /H 2 O system. Among the bimetallic catalysts prepared, Pt-Pb/SiO 2 is the best and nitrobenzene could be converted to p -aminophenol with a selectivity as high as 82% when the reaction was carried out using this catalyst at 110 °C under 5 MPa CO 2 and 0.2 MPa H 2 .
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MOLECULAR DIVERSITY
·
2024
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IF 3.9
Zhou Meng,Duan Xiujie,Jin Tao,Feng Xibing,Liu Ying,Wang Shuo,Feng Jiankang,Zhang Mengtong,Chai Tiantian,Mao Boneng,Shao Shihe,Jin Guofan
Fluorescent drugs and pyrimidine-indole scaffolds have been shown to have advantages in cancer treatment. Fluorescent antitumor drugs BF 3 - o, m, p- phenylenediamine pyrimidine-indole derivatives (PYB1, PYB2, and PYB3) were synthesized by linking pyrimidine and indole groups with aniline through a simple step and introducing BF 3 . The drugs exhibit promising antitumor activity and their fluorescent properties make them useful for imaging purposes. The optical properties of the three compounds have been investigated. All of them have fluorescent properties and compound PYB2 has good fluorescent properties. Additionally, the in vitro cytotoxicity of these compounds was evaluated against the human cancer cell line HeLa and the human normal cell line L02. The inhibition rates of HeLa cells treated with PYB1, PYB2, and PYB3 at a concentration of 19.2 μg/mL were 80.91%, 77.72%, and 65.94%, respectively. These results indicate a strong inhibitory effect on cancer cells. Further through the cell imaging experiment, we can see that PYB2 can enter the cell through the cell membrane through the fluorescence scattering diagram, which has good biocompatibility. In addition, the possible interactions between the compounds and Ras protein active sites were analyzed by molecular docking. The three compounds can bind well to Ras protein through hydrogen bonding. This study provides a basis for the development and modification of pyrimidine-indole fluorescent anticancer drugs. Compound PYB2 shows potential as a fluorescent anticancer drug. Graphical abstract
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Materials
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2025
·Vol. 18
·期 5
·930
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IF 3.2
Jiatao Xie,Shengkang Hu,Mengyuan Wei,Shenghui Xie
Fe-based metallic glass (MG) exhibits excellent performance as a heterogeneous catalyst in degradation but is rarely used as a working electrode in electro-Fenton (EF) systems. We used Fe78Si9B13MG as the working electrode to investigate the effect of the EF process on the degradation efficiency of p-nitrophenol (p-NP). The EF system had the highest catalytic efficiency (the reaction rate was 3.4 times that of chemical degradation) at a voltage of −1 V (vs. SCE) and showed 95.6% degradation of p-NP within 30 min. The electrode voltage accelerated the generation of hydroxyl radicals (·OH) in the system, thus promoting pollutant degradation. In addition, the Fe78Si9B13MG cathode demonstrated good structural stability and reusability after 10 cycles. Fe78Si9B13MG ribbons can serve as a suitable cathode material and provide potential optimization solutions for the degradation of organic pollutants.
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Journal of Materials Chemistry A
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2025
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IF 9.5
Peng Yin,Xiaohan Bie,Qingyang Tang,Linwei Zhu,Runhua Fan,Davoud Dastan,Hongzhi Cui,Kun Zhang,Zhicheng Shi
Polymer dielectrics characterized by high power density, fast discharge rate and reliability are critical in pulse energy storage systems. However, the low discharge energy density (Ud) of polymer dielectrics, stemming from the inverse coupling between dielectric constant (εr) and breakdown strength (Eb), renders them insufficient to meet miniaturized requirements of modern electronics. To address this challenge, we propose constructing dual interfacial gold nanodot interlayers within a barium titanate (BT)/poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) trilayer composite (BT-3L) to synergistically enhance its εr and Eb, ultimately achieving high Ud. Specifically, dual gold nanodot interlayers are anchored at the interface between the P(VDF-HFP) outer layer and the BT/P(VDF-HFP) middle layer via sputtering and hot-pressing processes. Benefiting from the interfacial polarization and Coulomb blockade effect induced by gold nanodots, the concurrently enhanced εr of 12.9 at 10 kHz and Eb of 520.08 MV m−1 are achieved. Consequently, a significantly improved Ud of 14.78 J cm−3, which is approximately 176.4% that of the BT-3L composite (∼8.38 J cm−3), is further realized in this composite with dual gold nanodot interlayers. This work provides a promising approach for designing high-performance multilayer dielectric composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Hassanien Gomaa,Cuihua An,Penggang Jiao,Wenliu Wu,Hassan A.H. Alzahrani,Mohamed A. Shenashen,Qibo Deng,Ning Hu
Owing to the high cost of precious metal catalysts for the oxygen evolution reaction (OER), the production of highly efficient and affordable electrocatalysts is important for generating pollution-free and renewable energy via electrochemical processes. A facile hydrothermal approach was employed to synthesize hybrid mesoporous iron-nickel bimetallic sulfides @ P, N -doped carbon for the OER. The prepared Fe 0.5 NiS 2 @C exhibited an overpotential (η) of 250 mV at 10 mA/cm 2 . This exceeded the overpotentials recently reported for surface-modified P, N -doped carbon-based catalysts for the OER in a 1 M KOH medium. Moreover, the Fe 0.5 NiS 2 @C catalyst showed a notable Tafel slope of 90.5 mV/dec with long-dated stability even after 24 h at 10 mA/cm 2 . The superior OER performance of the Fe 0.5 NiS 2 @C catalysts may be due to their large surface area , sheet-like morphology with abundant active sites, fast transfer of mass and electrons, control of the electronic structure by co-treatment with heteroatoms (e.g., P and N), and the synergistic effect of bimetallic sulfides, making them favorable catalysts for the oxygen evolution reaction. Density functional theory (DFT) calculations showed that the Fe 0.5 NiS 2 @C catalyst exhibited strong H 2 O-adsorption energy. The enhanced OER activity of Fe 0.5 NiS 2 @C was attributed to its higher surface area, favorable H 2 O adsorption energy , improved electron transfer efficiency, and lower Gibbs free energy compared to those of the other proposed catalysts.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Qing Fang,Qin Liu,Zongli Xie,Matthew R. Hill,Kaisong Zhang
Solvent-resistant nanofiltration membranes , capable of breaking “trade-off” between permeability and selectivity while resisting physical aging, hold crucial utility in developing advanced membrane materials and reducing energy consumption associated with solvent recovery. Herein, the development of scalable, mixed matrix membranes (MMMs) was presented based on polysulfone (PSf) substrate with ultra-high permeability and aging resistance. The upper selective layer was composed of poly-trimethylsilylpropyne (PTMSP) and two types of nano-fillers, namely poly-dichloroxylene ( p -DCX) and sodium dodecylbenzene sulfonate-molybdenum sulfide (SDBS-MoS 2 ). Under the influence of the additives, the redistribution of the free volume of the polymer as well as the internal spaces within additives creates additional pathways for solvent diffusion, thus increasing solvent permeance. Additionally, the combined effect of the two additives is likely to inhibit filler agglomeration and improve the overall effectiveness of the additives. Compared to pure PTMSP membranes, the p -DCX/SDBS-MoS 2 PTMSP MMMs exhibited enhanced methanol permeance (10.58 vs. 3.14 L m −2 h −1 bar −1 ) and RB rejection (99.23 vs. 96.13 %), which greatly exceeded that of current OSN MMMs. As anticipated, aging of the prepared membranes decelerated with the addition of the additives, and the methanol permeation loss rate decreased from 50.32 % to 13.23 % after 300 h. Molecular dynamics simulations explored by structural analysis revealed the mechanism for the significant improvement in methanol permeance and aging resistance. The membranes obtained were found to be highly industrially applicable, thereby offering the potential to reduce operation costs in energy-intensive separation processes.
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ACS Applied Nano Materials
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2024
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IF 5.3
Shuen Chen,Gengchang Lai,Xiaoyi Zhang,Xiaoxiao Feng,Liping Tong,Chenglong Peng,Xingchen He,Yang Li,Jiahong Wang
Phosphorus is an ideal anode material for high-rate lithium-ion batteries due to its high theoretical specific capacity and moderate operating potential. However, phosphorus undergoes tremendous volume expansion and low electrical conductivity during lithium storage, affecting its actual lithium storage performance. The formation of P–C bonds is an effective strategy to inhibit the volume expansion and maintain stable electrical contact between phosphorus and the current collector. Herein, high strength metal nanoparticles, such as molybdenum nanoparticles, are introduced into the ball milling process to reinforce P–C bonding and enhance the lithium storage performance. As a result, the BP/Mo/CNTs anode provides a high-rate capacity of 984 mAh g–1 at 8.0 A g–1 and high capacity retention of 90.3% after 300 cycles at 0.5 A g–1. To demonstrate the universality of this method, BP/W/CNTs nanocomposites were prepared by tungsten-assisted ball milling. This facile strategy provides a practical approach for the formation of abundant covalent bonds to improve the electrochemical performance of composites.
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ACS Nano
·
2024
·
IF 15.8
Haijian Huang,Hao Feng,Ziyu He,Yanan Huang,Jiawei Xu,Chengzhi Hu,Zhangxian Chen,Zeheng Yang,Weixin Zhang
Enhancing proton storage in the zinc-ion battery cathode material of MnO2 holds promise in promoting its electrochemical performance by mitigating the intense Coulombic interaction between divalent zinc ions and the host structure. However, challenges persist in addressing the structural instability caused by Jahn–Teller effects and accurately modulating H+ intercalation in MnO2. Herein, the doping of high-electronegativity Sb with fully occupied d-orbital in MnO2 is reported. The Sb doping strategy engenders the formation of Mn–O–Sb path in the structure with a strong dipole polarization field, which facilitates the delocalization of eg orbital electron in Mn and thus mitigates the Jahn–Teller effects. Simultaneously, adjusting the level of Sb doping in MnO2 leads to modulation of the p-band center of O, optimizing its interaction with hydrogen and thereby enhancing proton storage. Consequently, MnO2 doped with 6% Sb exhibits commendable performance in both rate capability and cycling endurance, delivering 113 mAh g–1 at 2 A g–1 after 2000 cycles. This investigation underscores the crucial role of electronic structural engineering in elevating the electrochemical performance of cathode materials for zinc-ion batteries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Mengdie Yang,Jiabao Zuo,Yanan Pan,Gaifang Lv,Qi Yang,Yang Fan,Fan Qiu,Shupeng Zhang
In this work, a novel flexible electrochemical sensor was successfully developed for the simultaneous determination of p-aminophenol and acetaminophen. The sensor is composed of a methanesulfonic acid-treated poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) film on a poly(ethylene terephthalate) substrate, which has been modified using a zinc oxide-doped tin oxide heterojunction applied through drop-coating (C-ZnO/SnO 2 -PEDOT/PET). The oxygen vacancies resulting from zinc oxide-doped tin oxide heterojunctions within highly conductive metal oxide nanomaterials enhance mass transfer and synergize seamlessly with methanesulfonic acid-treated electrically conductive dielectric PEDOT/PET films, leading to a substantial improvement in electrochemical activity. Under the optimal conditions, a wider linear range and lower detection limits were shown for p-aminophenol (2–511 μM, LOD=0.437 μM) and acetaminophen (2–591 μM, LOD=0.562 μM). In addition, the sensors demonstrated high accuracy in detecting p-aminophenol and acetaminophen in real samples, with recoveries of 99.36 %-99.60 % and 97.56 %-99.80 %, respectively. Furthermore, the flexible sensors maintained a superior electrochemical response when detecting p-aminophenol and acetaminophen at different bending angles, with relative standard deviations of 0.62 % and 1.68 %, respectively. These findings suggest potential applications for the development of wearable sensors in the future.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Chang Xi,Wenxiu Xu,Shaobo Zhou,Yucheng Wang,Sheng Han,Jibo Jiang
The construction of non-uniform interfaces with inert metal-free electroactive materials is essential to achieve rapid kinetics and high ion/electron transfer rates for HER. Herein, an efficient synthesis strategy is employed, which is the construction of single-atom phosphorus-doped MoS 2 nano-arrays on nitrogen-doped graphene oxide aerogel (P–MoS 2 /NGA), providing a good guarantee for rapid charge transfer and the long-term stability by preventing the massive accumulation of P–MoS 2 . Benefiting from this strategy, the optimized catalyst (P–MoS 2 /NGA) with more surface active sites exhibited unexpected hydrogen precipitation reaction (HER) activity. A current density of 10 mV cm -2 was achieved in 1.0 M KOH with a voltage of only 79 mV and a Tafel slope dec -1 of 97 mV. Density Functional Theory (DFT) confirms the formation of strong P 2p-S 2p-Mo 3d hybridization at the Fermi energy level, resulting in deeper d-band centers and more optimized hydrogen adsorption sites. Therefore, P–MoS 2 nanosheets/nitrogen-doped graphene 3D hybrid aerogel has great potential to become excellent electrochemical hydrogen precipitation material.
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COMBUSTION AND FLAME
·
2024
·
IF 5.8
Yuwen Deng,Wenhao Yuan,Sandro Gaïl,Wei Li,Long Zhao,Jiuzhong Yang,Fei Qi,Yuyang Li,Philippe Dagaut
Pyrolysis and oxidation of p -xylene over wide conditions were studied in this work in order to provide a comprehensive insight into the combustion chemistry of p -xylene. Concerning this goal, the pyrolysis of p -xylene was investigated in a flow reactor at pressures from 0.04 to 1 atm over the temperature range of 1000–1600 K. Key radicals, isomers and PAH products including three xylyl isomers, benzyl, xylylene isomers, styrene, benzene, fulvene, indene, naphthalene and phenanthrene, were identified and quantified using synchrotron vacuum ultraviolet photoionization mass spectrometry. The oxidation of p -xylene was studied in a jet-stirred reactor at 10 atm, 800–1300 K and equivalence ratios of 0.5–2.0 with a residence time of 0.5 s. Oxidation products were quantified by using gas chromatography combined with mass spectrometry and Fourier transform infrared spectrometry. A kinetic model for p -xylene combustion over wide conditions was developed based on our previously proposed p -xylene oxidation model and validated against the new experimental measurements in this work and literature reported experimental data, including flow reactor oxidation, laminar premixed flame, ignition delay time and laminar burning velocity. In the flow reactor pyrolysis, p -xylene mainly undergoes unimolecular decomposition to yield p -xylyl, which mainly suffers the H-loss reaction to form p -xylylene and isomerization reaction to form o -xylyl. The resonantly stabilized fulvenallenyl and benzyl radicals play an important role in the formation of bicyclic and tricyclic PAHs including indene, naphthalene, and phenanthrene. In the JSR oxidation, p -xylene is predominantly consumed via H-abstraction by oxygenated radicals such as OH, O, and HO 2 forming p -xylyl, which can be oxidized by HO 2 and eventually converted to p -methylbenzaldehyde. As the most abundantly produced oxygenated aromatics, further consumption of p -methylbenzaldehyde results in the formation of other observed oxygenated aromatics such as cresol, benzofuran, and benzaldehyde. The combustion chemistry of three C 8 H 10 isomers, i.e., p -xylene, o -xylene, and ethylbenzene, were also compared in terms of pyrolysis and oxidation fuel reactivity, and PAHs formation and growth, showing remarkable fuel isomeric effects.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Shuqing Chang,Yan Feng,Yuncai Zhao,Yanghe Fu,Huilin Jia,Yijing Gao,Fumin Zhang,Rui Ma,Xinqing Lu,Maohong Fan,Weidong Zhu
The application of covalent organic frameworks (COFs) for the photocatalytic reduction of CO2 is mostly limited by severe charge recombination and low sunlight utilization. Herein, a triazine-based COF with an electron-rich and large π-conjugated system (TCOF) was employed as a building block and integrated with CuInS2 (CIS) to construct a noble-metal-free and high-efficiency photocatalyst for CO2 reduction. The in situ growth of CIS nanosheets on TCOF creates a p–n heterojunction, named CIS@TCOF. Compared with TCOF, the CIS@TCOF heterostructure exhibits a dramatically boosted photocatalytic performance in the reduction of CO2. The produced HCOOH yield over 10 wt % CIS@TCOF can be up to 171.2 μmol g–1 h–1 under visible light irradiation with good reproducibility, which is about 3 times as high as that over TCOF. Further in-depth studies indicate that the introduction of CIS not only enhances the visible light utilization but also restrains the recombination of photogenerated electron–hole pairs efficiently and facilitates the photoinduced charge transfer via the p–n heterojunction system due to the unique structural and compositional features. This research shows the great potential of COFs as efficient photocatalytic carbon fixation materials and provides a versatile route to construct semiconductor-COF heterostructures for photocatalysis.
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