SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Xiang Liu,Haoyu Chen,Xiaojun Hu,Jing Liu,Yuee Zhong,Peipei Li,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Shouzhuo Yao
Developing rapid and user-friendly visual techniques for distinguishing and identifying heavy metal ions is a critical pursuit in food and environmental analysis. In this work, a zirconium-based metal organic framework (MOF) known as PCN-222 has been synthesized, serving as a colorimetric nanoplatform for the differentiation and detection of Cd 2+ and Pb 2+ in the presence of PO 4 3- . The remarkable characteristic of PCN-222 stems from its reaction with PO 4 3- , where the robust bonding between PO 4 3- and Zr nodes triggers the collapses of PCN-222, leading to the release of ligands (TCPP) with visible alteration in solution color to light red. When exposure to Cd 2+ and Pb 2+ , shifts to green and yellow, respectively, are discernible. These changes can be ascribed to differences in the size, atomic configuration, and electronegativity of the two metal ions, which impact their interaction with TCPP. The innovative concept of a nanomaterial traffic light is introduced based on these color transitions. Accurate quantification of Cd 2+ and Pb 2+ can be efficiently accomplished both individually and concurrently using UV spectroscopy and a mobile phone APP, providing adaptability in method selection depending on on-site conditions. Moreover, the platform effectively tackles selectivity challenges associated with ligand-based detection methods, showcasing high sensitivity, distinct visual indications, and simplicity in instrumentation requirements.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Shengwang Mo,Da Song,Yang Li,YuChao Zhou,Zhao-Qing Liu,Zhen Huang,Fang He
Coupling renewable energy with seawater electrolysis for green hydrogen production represents a promising approach in energy storage and conversion. Yet, conventional anodic materials suffer from chloride corrosion and active-site blockage in seawater, causing rapid deactivation at high current densities. It is thus crucial to develop electrode materials with inherent corrosion resistance and high catalytic activity that can sustain operation at ampere-level currents in harsh seawater environments. In this work, we precisely engineered a NiFe layered double hydroxide (LDH) anode functionalized with adsorbed PO43– and SO42– anions. This modified catalyst demonstrates exceptional sustainability-relevant durability, operating continuously for over 140 h at an industrially relevant current density of 1100 mA cm–2 in an alkaline flow cell, while requiring an overpotential of only 201 mV to achieve 100 mA cm–2. Compared to the unmodified sample, the catalyst demonstrates significantly enhanced activity and corrosion resistance. Further mechanistic insights into the oxygen evolution reaction (OER) were gained through in situ spectroscopy and electrochemical differential mass spectrometry (DEMS). In situ Raman spectroscopy captured the dynamic reconstruction of the electrode material, leading to the formation of a stable active phase identified as NiFeOOH/PO43–/SO42–. By combining in situ 18O-isotope-labeled DEMS with ATR-FTIR spectroscopy, the compatibility between the conventional adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) during the OER was confirmed. The synergy of these two mechanisms was shown to further enhance the OER performance. The results establish that PO43–/SO42– adsorption plays a dual role: it electrostatically repels Cl– to mitigate corrosion, while simultaneously activating lattice oxygen to promote the LOM pathway, thereby improving surface reactivity. The anion adsorption strategy presented here offers valuable guidance for designing efficient and robust anode materials for seawater electrolysis.
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DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Mingzhu Ni,Qiuying Xia,Jiaxin Liu,Xiaohui Zhu,Hui Xia
Spinel LiMn2O4 cathode possesses open three-dimensional ion transport channels, high safety, and abundant resources, making it a promising candidate for high-power lithium-ion batteries. However, spinel LiMn2O4 inevitably faces serious challenges of manganese dissolution and irreversible phase transitions during the electrochemical process, leading to rapid capacity decay and limiting its rate performance. Herein, we report a simple two-step solid-state sintering method to realize Li+ and PO43– codoping synergy in spinel LiMn2O4. It is found that PO43– doping not only expands the lattice parameters of the material, enhancing its charge-transfer kinetics but also increases the relative content of active Mn3+, improving the specific capacity of spinel LiMn2O4. Meanwhile, Li+ doping effectively enhances the stability of the spinel structure, and the irreversible phase transition from cubic phase to tetragonal phase could be effectively suppressed in spinel LiMn2O4. Consequently, benefiting from the synergistic effect of Li+ and PO43– codoping, the optimally codoped spinel LiMn2O4 electrode delivers high specific discharge capacities of 116 and 102 mA h g–1 at 1 and 20C, respectively, and achieves 78.1% capacity retention after 1000 cycles at 5C. This strategy provides an effective modification approach to developing advanced electrode materials for lithium-ion batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuanmeng Lou,Zhaotian Ba,Zhaodi Yuan,Jian Li,Cui Li,Lili Ma,Xiujuan Wang,Xin Wen,Pingan Song
The development of carbon fiber reinforced epoxy resin (EP/CF) composites with good balance on flame retardancy and mechanical properties remains a critical challenge. Inspired by the rod@sheets hierarchical structure of corncobs, herein a novel CF/PO 4 3− intercalated NiFe-LDH hybrid (CF@NiFe-LDH-P) was successfully fabricated via in-situ growth of NiFe-LDH nanosheets on CF surfaces, followed by PO 4 3− intercalation via an ion-exchange process. Subsequently, the as-synthesized CF@NiFe-LDH-P was incorporated with EP matrix. The resultant EP/CF@NiFe-LDH-P composites exhibited remarkable improvements in flame retardancy, including the limiting oxygen index (LOI) value of 36.8 %, UL-94 V0 rating, and a 66.8 % reduction in the peak of heat release rate (PHRR). According to the structure/composition analysis of residual char, the flame-retardant mechanism was mainly ascribed to the synergistic effect between NiFe-LDH and PO 4 3− , where NiFe-LDH catalyzed the carbonization of EP fragments into graphitized carbon, while PO 4 3− enhanced the cross-linking of char network through phosphate ester bonds. Meanwhile, the flame retarded EP/CF@NiFe-LDH-P composites displayed superior mechanical performances. Compared to the pristine EP/CF, EP/CF@NiFe-LDH-P displayed outstanding mechanical properties in Young's modulus (+26.9 %), tensile strength (+26.2 %) and impact strength (+39.4 %). These enhancements were attributed to the corncob-like structure of CF@NiFe-LDH-P, which established strong interfacial adhesion with EP via hydrogen bonding. This work presents an innovative bio-inspired strategy to achieve synergistic optimization of flame retardancy and mechanical performances in EP/CF composites, paving the way for their expanded applications in high-performance engineering and advanced technological fields.
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DYES AND PIGMENTS
·
2023
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IF 4.5
Qiushuang Li,Bing Zhao,Xiangdong Kong,Liyan Wang,Wei Kan,Bo Song,Rui Yu,Pengfei Zhang
Designation and application of the luminescent COFs remains a tough challenge and imperative task because of their limited building block structure, the unavailable raw material, the tedious modification process, or the onefold sensing function. Herein, a fluorinated fluorescent covalent organic framework containing a phenanthro[9,10- d ]imidazole moiety [TFPB-PI(F)–COF] had been successfully designed for Cu 2+ and Al 3+ detection relayed by PO 4 3− . TFPB-PI(F)–COF serves as a highly sensing platform with the superior selectivity toward Cu 2+ and Al 3+ based on the coordination interaction and the chelation enhancement quenching (CHEQ) effect, and the detection limits are 2.3 and 4.2 n mol L −1 , respectively. Subsequently, accompanied with the gradual introduction of PO 4 3− , TFPB-PI(F)–COF@M (Cu 2+ and Al 3+ ) complex is wrecked due to electrostatic attraction with the detection limit of 10 n mol L −1 , led to the fluorescent recovery of TFPB-PI(F)–COF. Furthermore, the reversible fluorescent performance by the mode of “on–off–on” is perfect. Besides, the established relayed method can be successfully employed for the analysis of Cu 2+ and Al 3+ in environmental water samples with recoveries of 96.00–104.63 % and RSD <4.62 %. Moreover, the fluorescent images for the visual detection of Cu 2+ is also fabricated in living HeLa cells, which provides a modest contribution and an effective platform to the biological analysis.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-12
·
IF 5.3
Liu Xiang,Li Huijun,Sun Junjun,Shi Jianchao,Xu Zhouqing,Wang Yan
A HPU-23@Ru@Tb-NH 2 sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb 3+ -functionalized metal organic framework and Ru(bpy) 3 2+ and applied to the simultaneous detection of Hg 2+ , ClO − , and PO 4 3− via differently responsive channels. HPU-23@Ru@Tb-NH 2 had a photoresponsive colorimetric response toward Hg 2+ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH 2 sensor array were influenced by ClO − and PO 4 3− to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO − and PO 4 3− from each other. The detection limits of ClO − and PO 4 3− were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences. Graphical
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PubMed
高影响因子
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