Small
·
2023
·Vol. 19
·期 38
·2302055
·
IF 13.3
Chaojie Lyu,Yanle Li,Jiarun Cheng,Yuquan Yang,Kaili Wu,Jiwen Wu,Huichao Wang,Woon-Ming Lau,Ziqi Tian,Ning Wang,Jinlong Zheng
Heteroatoms Fe, F co-doped NiO hollow spheres (Fe, F-NiO) are designed, which simultaneously integrate promoted thermodynamics by electronic structure modulation with boosted reaction kinetics by nano-architectonics. Benefiting from the electronic structure co-regulation of Ni sites by introducing Fe and F atoms in NiO , as the rate-determined step (RDS), the Gibbs free energy of OH* intermediates (Δ G OH* ) for Fe, F-NiO catalyst is significantly decreased to 1.87 eV for oxygen evolution reaction (OER) compared with pristine NiO (2.23 eV), which reduces the energy barrier and improves the reaction activity. Besides, densities of states (DOS) result verifies the bandgap of Fe, F-NiO(100) is significantly decreased compared with pristine NiO(100), which is beneficial to promote electrons transfer efficiency in electrochemical system. Profiting by the synergistic effect, the Fe, F-NiO hollow spheres only require the overpotential of 215 mV for OER at 10 mA cm −2 and extraordinary durability under alkaline condition. The assembled Fe, F-NiO || Fe-Ni 2 P system only needs 1.51 V to reach 10 mA cm −2 , also exhibits outstanding electrocatalytic durability for continuous operation. More importantly, replacing the sluggish OER by advanced sulfion oxidation reaction (SOR) not only can realize the energy saving H 2 production and toxic substances degradation, but also bring additional economic benefits.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Honglin Qin,Yuan Tao,Ruiting Niu,Bingyan Han,Lizhen Qiao
In this work, magnetic flower-like and fluorine-doped nickel oxide composites Fe 3 O 4 @SiO 2 @F/NiO were prepared and applied for the magnetic solid-phase extraction (MSPE) of five imidazole fungicides. The obtained materials were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller analysis to verify the successful synthesis. The effect of some experimental parameters on the extraction efficiency were explored to optimize the MSPE conditions, including the adsorbent dosage, ultrasonic time, salt concentration, sample solution pH, elution solvent type and volume. Then, method validation was performed under the optimal conditions in combination with high-performance liquid chromatography-ultraviolet detection. The determination coefficients ranged from 0.9956 to 0.9991, and the limits of detection and limits of quantification for the imidazole fungicides were 0.1–3 μg·L −1 and 0.3–10 μg·L −1 , respectively. Moreover, the intra-day and inter-day precisions were evaluated in three different concentrations with relative standard deviations in the range of 1.34 %-13.31 % and 4.96 %-13.92 %. At last, the proposed MSPE method was used to enrich and determine imidazole fungicides in tap water, milk and green tea samples, and the spiked recoveries were in the range of 77.93 %-119.38 %, demonstrating the potential of the method in the determination of imidazole fungicides from real samples.
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高影响因子
POLYMER
·
2020
·
IF 4.231
Yufei Liu,Siyuan Jiang,Wei Yan,Jun Qin,Min He,Shuhao Qin,Jie Yu
Improving complexation at the interfaces and regulating the crystal transformation behaviors of polyamide 6 (PA6) composites with high mechanical and thermal properties are essential for the industrial applications of PA6. In this work, the effects of adding p (N-(4-F-phenylmaleimide)-alt-styrene) (PFS) on the crystal transformation, thermostability, thermal conductivity , and mechanical properties of PA6 were investigated and discussed systematically. The resu---lts from heat deflection temperature (HDT), dynamic mechanical analysis (DMA ) and thermal conductivity tests indicate that PFS greatly increases the HDT, glass-transition temperature ( T g ), and thermal conductivity of PA6. Simultaneously, when the content of PFS is 10%, the tensile strength and flexural moduli of PA6/PFS composites are increased by 10.5 and 17.8% compared with that of pure PA6, respectively. The results from differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) show that PFS induces the transformation of PA6 from γ to α crystals by interfacial complexation. This work offers a facile approach for producing materials with high thermal and mechanical performances that can be potentially used in automobiles, electronics, and related technologies.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 26
·10554-10559
·
IF 3.069
Xuelei Pang,Junqi Ge,Xudong Yu,Yajuan Li,Fengjuan Shen,Yanqiu Wang,Jujie Ren
A novel fluorescent organogelator (Y1) with both photoinduced electron transfer (PET) and intramolecular charge transfer (ICT) characteristics was designed and synthesized. The gelator Y1 could selectively recognize and discriminate fluoride and acetate ions in both solution and gel systems. Interestingly, addition of F− to the Y1 solution resulted in a dramatic enhancement of the fluorescence intensity and an obvious change in fluorescence color. However, the fluorescence intensity and color of the Y1 solution were strongly dependent on time after the addition of OAc−. Moreover, the organogel treated with F− experienced a quick gel-to-sol transition, while only color and fluorescence changes were observed without gel collapse after adding OAc− to the gel system. The sensing mechanisms were studied by 1H NMR, SEM and spectroscopic experiments.
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高影响因子
Journal of Materials Chemistry C
·
2014
·Vol. 2
·期 28
·5651-5659
·
IF 0
Ling Fan,Ruili Cui,Xiuping Guo,Dong Qian,Beibei Qiu,Jun Yuan,Yongfang Li,Wenlong Huang,Junliang Yang,Weifang Liu,Xinjun Xu,Lidong Li,Yingping Zou
A new alkylthienyl substituted thieno[2,3-f]benzofuran (TBF)-based polymer (PTBFTDTBT) was synthesized and characterized. PTBFTDTBT had a high molecular weight, good solubility in common organic solvents, broad visible absorption from 300 to 750 nm, and a relatively deep highest occupied molecular orbital level (−5.2 eV). PTBFTDTBT also showed a field hole mobility up to the order of 10−2 using an organic field effect transistor (OFET) method and an order of 10−2 using a space-charge-limited current (SCLC) method. With the structure of indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate/PTBFTDTBT:PC71BM (1 : 2, w/w)/Ca/Al, a power conversion efficiency of 6.42% was obtained with a high short circuit current (Jsc) of 13.51 mA cm−2 and fill factor (FF) of 61%, under the illumination of AM1.5G, at 100 mW cm−2, without any post-treatment. The study demonstrates that TBF is a promising building block for organic electronics.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Min Wang,Guanghua Lu,Runren Jiang,Tianjian Dang,Yufang Chen,Jianchao Liu,Zhenhua Yan,Jun Hou
The widespread use of bisphenol F (BPF) as the commonly used alternative to bisphenol A (BPA) in the industry and its hazardous effects on ecological system and human health have attracted widespread attention. In this study, V C -FCN 0.3 hollow nanotube structure with confinement space effects and combined carbon vacancies was constructed by the spatial self-corrosion strategy, which effectively addressed the inherent limitations of conventional carbon nitride and achieved 100% removal rate of BPF within 2 h under visible light. Carbon vacancies not only accelerated the transfer of photogenerated carriers, but also enhanced the adsorption and activation of oxygen that accelerating the production of ·O 2 − , the main active species in this system. In addition, the special spatial structure shortened the mass transfer distance between the target pollutants and the active species. What's more, V C -FCN 0.3 showed excellent, stable, and eco-friendly photocatalytic degradation of bisphenol F over a wide pH range and in five water matrices, contributing effectively to the solution of purification of wastewater containing bisphenol analogues.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Ye Pengcheng,Fang Keqing,Wang Haiyan,Wang Yahao,Huang Hao,Mo Chenbin,Ning Jiqiang,Hu Yong
Oxygen evolution reaction (OER) is critical to renewable energy conversion technologies, but the structure-activity relationships and underlying catalytic mechanisms in catalysts are not fully understood. We herein demonstrate a strategy to promote OER with simultaneously achieved lattice oxygen activation and enhanced local electric field by dual doping of cations and anions. Rough arrays of Fe and F co-doped CoO nanoneedles are constructed, and a low overpotential of 277 mV at 500 mA cm −2 is achieved. The dually doped Fe and F could cooperatively tailor the electronic properties of CoO, leading to improved metal-oxygen covalency and stimulated lattice oxygen activation. Particularly, Fe doping induces a synergetic effect of tip enhancement and proximity effect, which effectively concentrates OH − ions, optimizes reaction energy barrier and promotes O 2 desorption. This work demonstrates a conceptual strategy to couple lattice oxygen and local electric field for effective electrocatalytic water oxidation.
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PubMed
高影响因子
MEASUREMENT
·
2024
·
IF 5.2
Bin Yin,Zhuxuan Jiang,Shilin Liu,Guofeng Sang,Yanzhi Lv,Muguang Wang,Shiying Xiao,Beilei Wu,Qichao Wang,Li Pei,Songhua Wu
A composite Fabry-Perot (F-P) fiber optic sensor based on the vernier effect is fabricated, and experiments confirmed that it can be used to simultaneously measure underwater temperature and pH. The fiber optic sensor fabricated with single mode fiber (SMF) − multi mode fiber (MMF) − seven core fiber (SCF) − quartz capillary tube (QCT) − no core fiber (NCF) structures has contained a silane coupling agent-polyvinyl alcohol/graphene oxide (SCA-PVA/GO) hybrid multilayer film to enhance the sensor performance. Two types of sensors are fabricated, one with a plane end face and another with a tapered end surface, which named as sensor 1 and sensor 2, respectively. Their performance are experimentally demonstrated. Within the temperature range of 15°C-35°C and the pH range of 7.55–9.21, the sensitivities of sensor 1 to temperature and pH are 82.94 pm/°C and 1.16 dB/pH, while the corresponding values of sensor 2 are 39.26 pm/°C and 0.4 dB/pH. Experimental results demonstrated that the sensitivities of sensor 1 to temperature and pH are higher than that of sensor 2. But compared with sensor 2, sensor 1 has higher values of crosstalk and random error. By contrast, sensor 2 maintain a good linear relationship with the environmental dual parameters, allowing for the simultaneous measurement of underwater temperature and pH. Moreover, both sensors demonstrate good stability and reversibility when the temperature and pH are varied. Furthermore, the pH response times of the two sensors are less than 0.5 s, with a recovery time of 2 s. Thus, the proposed sensors with outstanding stability, reversibility, repeatability, and rapid response times will have a broad range of applications in the fields of marine environment monitoring, water quality detection, and food and medical device safety testing.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yu Hao,Dongfang Chen,Dongyi Pu,Song Hu,Pavese Doague Nguela,Pucheng Pei,Xiaoming Xu
The development of efficient and durable hydrogen evolution reaction (HER) electrocatalysts is critical for sustainable energy conversion. Although platinum (Pt) serves as a benchmark HER catalyst, its practical application is hindered by the high cost, limited durability, and susceptibility to CO poisoning. In this work, we report a heterojunction Pt-based catalyst, Pt@NCL-MXene, synthesized by LiF etching of MXene and subsequent NH3 calcination. This process introduces dual nitrogen (N) and fluorine (F) doping and yields a nitrogen-doped carbon layer (NCL) coating on Pt nanoparticles with an average size of only 3.4 nm. Compared with conventional Pt–C catalysts, Pt@NCL-MXene exhibits a larger specific surface area, enhanced electron transfer efficiency, and an optimized d-band center, thereby facilitating both H* adsorption and desorption. As a result, Pt@NCL-MXene achieves a significantly lower overpotential of 73 mV at a current density of 100 mA cm–2, alongside improved kinetics and stability under operational conditions. Furthermore, the 9 wt % F-rich MXene support effectively suppresses CO adsorption on Pt, reducing the CO uptake to 0.224 mmol g–1, which is purportedly lower than that of Pt–C (0.264 mmol g–1), thereby mitigating CO poisoning and prolonging the catalyst’s service life. These findings offer insights into the rational design of advanced CO-resistant Pt-based HER electrocatalysts.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 10
·5664-5677
·
IF 3.502
Yao Ji,Yongbao Xiao,Shujing Huang,Weichao Wang
Fluoro-sulfo-phosphate (FPS) glass is of current interest as potential material for laser application due to its good glass-forming ability, thermal, and chemical stability as well as the complicated local environment for incorporated species. Herein, the physical and luminescent properties of Er 3+ and Yb 3+ /Er 3+ -doped FPS glasses vs S/F ratio are investigated comprehensively. The low melting temperature (750°C) leads to fewer ingredients evaporation and easier operation. The sulfate addition depolymerizes the structure of FPS glasses, leading to either monotonic or nonmonotonic variations of physical properties, while no deterioration in thermal and limited one in chemical stability is caused. The addition of sulfate also modifies the local structure around optical active species and thus, leading to higher emission cross section (1.52 × 10 −20 cm 2 ), effective linewidth (68.4 nm), figure of merit (5.61 × 10 −23 s cm 2 ), gain bandwidth (102.44 × 10 −27 cm 3 ), and energy-transfer microparameters (51.87 × 10 −39 cm 6 /s), implying high possibility to serve as 1.5 μm laser application.
研究领域:
材料科学
·
光学
·
激光物理
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 20
·8061-8069
·
IF 8.067
Xicai Liu,Huan Wang,Dongcheng Yang,Fangli Jing,Hailong Qiu,Hongjun Liu,Zhanggui Hu
Trivalent lanthanoid ions (Ln3+) with substantial inherency have been utilized in luminescent materials and photonic devices for decades. Because the periodic physicochemical properties of lanthanoid compounds have been found to be closely related to the regular f-configuration of the elements, it is essential to study the interaction between the f-electrons and the circumstances for developing new applications. Two-dimensional transition metal dichalcogenides (2D-TMDs) manifest as excellent matrices for tunable electronic structures owing to their chemical accessibility and physical sensitivity. Herein, a novel method is proposed for the fabrication of Ln3+ substitutional doped MoS2 using a Na2MoS4 solution precursor. Monolayers doped with all Ln3+ ions (except Pm3+) are synthesized, which is confirmed by structural characterization. Their shrunk Raman frequency differences and the blue-shifting and intensity boosting of their photoluminescence (PL) peaks are observed. Periodic trends are discovered in the PL spectra, which are sensitive to specific elements. The results reveal the ordered interaction between f-orbitals and the host possessing an appreciable coulombic field, spin–orbital coupling, and a crystal field. This work offers a crucial extension of lanthanoid laws and a new approach to the modulation of the properties of 2D crystals.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
物理化学
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高影响因子
Science Advances
·
2022
·Vol. 8
·期 23
·
IF 14.957
Peixin Zhang,Yao Zhong,Yan Zhang,Zhenliang Zhu,Yuan Liu,Yun Su,Jingwen Chen,Shixia Chen,Zheling Zeng,Huabin Xing,Shuguang Deng,Jun Wang
One-step separation of C 2 H 4 from ternary C 2 H 2 /C 2 H 4 /C 2 H 6 hydrocarbon mixtures is of great significance in the industry but is challenging due to the similar sizes and physical properties of C 2 H 2 , C 2 H 4 , and C 2 H 6 . Here, we report an anion-pillared hybrid ultramicroporous material, CuTiF 6 -TPPY, that has the ability of selective recognition of C 2 H 4 over C 2 H 2 and C 2 H 6 . The 4,6-connected fsc framework of CuTiF 6 -TPPY exhibits semi–cage-like one-dimensional channels sustained by porphyrin rings and TiF 6 2− pillars, which demonstrates the noticeably enhanced adsorption of C 2 H 2 and C 2 H 6 over C 2 H 4 . Dynamic breakthrough experiments confirm the direct and facile high-purity C 2 H 4 (>99.9%) production from a ternary gas mixture of C 2 H 2 /C 2 H 6 /C 2 H 4 (1/9/90, v/v/v) under ambient conditions. Computational studies and in situ infrared reveal that the porphyrin moieties with large π-surfaces form multiple van der Waals interactions with C 2 H 6 ; meanwhile, the polar TiF 6 2− pillars form C–H•••F hydrogen bonding with C 2 H 2 . In contrast, the recognition sites for C 2 H 4 in the framework are less marked.
研究领域:
材料科学
·
化学工程
·
物理化学
·
吸附分离
·
多孔材料
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高影响因子
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