INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Hai-Bo Zhao,Zhi-Bing Fu,Xue-Yi Liu,Xiao-Cao Zhou,Hong-Bing Chen,Ming-Long Zhong,Chao-Yang Wang
Novel magnetic and conductive Ni/carbon aerogels have been successfully fabricated through an autocatalytic reduction process. The resultant Ni/carbon aerogels have nanoporous structure with high specific surface area, low densities, appropriate electrical conductivities and controllable magnetization. Due to these special attributes, the aerogel composites are demonstrated to be a great microwave absorbent possessing strong and controllable EM absorption with ultrathin thickness. Only with filler loading of 10 wt % in the wax, a minimum RL of −57 dB is found at 13.3 GHz with the thickness of 2 mm. Even with the thickness of 1.5 mm, the Ni/carbon aerogel-3 composite can exhibit the low RLmin value of −32 dB and wide effective EM absorption bandwidth of 4.0 dB. The synergistic effect of the medium dielectric loss, weak magnetic loss and good impedance match, accounts for the high microwave absorption performance.
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JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Wangli Yao,Tian Liu,Jingxian Zheng,Saitao Yan,Baoliang Chen,Xiaoying Zhu
Conventional catalytic membranes often exhibit inadequate catalytic efficiency due to limited retention time for pollutants during filtration. In this study, a single-atom catalyst (Ni-NG) was prepared by dispersing single nickel atoms onto nitrogen-doped graphene oxide sheets. Subsequently, under controlled conditions, the assembly of Ni-NG with reduced graphene oxide (rGO) sheets led to the fabrication of efficient electrocatalytic cathodic membranes (ECMs). The ECMs were designed to concentrate and dehalogenate antibiotics simultaneously by utilizing the confined single nickel atoms within the multilayered ECMs through electrocatalytic reduction. Remarkably, complete degradation of chloramphenicol (CAP, 20 mg L −1 ) in the solution was achieved within a remarkably short time of 3.0 ms by ECM8 which had an area of 7.1 cm 2 and comprised Ni-NG (16.9 μg) and rGO (16.9 μg), with an interlayer spacing of 0.37 nm, during filtration (40 L m −2 h −1 ). The reaction rate constant (k) for CAP degradation by ECM8 was approximately 3 × 10 8 min −1 , surpassing the highest value in the literature. Furthermore, the ECM demonstrated both high energy efficiency and stability, highlighting the great potential for practical applications. The electrocatalytic cathodic membrane, designed to primarily concentrate pollutants in confined interlayer spaces through the sieving effect, shed lights on the highly efficient dehalogenation of organic compounds in pharmaceutical salt-laden wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Kuang Wang,Zhanqiang Fang
In this work, a cost-effective ball-milling technique was employed to synthesize submicron oxalated zero-valent iron co-doped with graphite and nickel (G@Fe OX bm /Ni), aiming to enhance the removal efficiency of the recalcitrant pollutant 2, 2′, 4, 4′ – tetrabromodiphenyl ether (BDE-47) while minimizing secondary risks. The incorporation of graphite significantly improved the debromination efficiency of BDE-47, with a rate constant of 0.26 day −1 in a tetrahydrofuran/water system, which represents a 59.88 % increase over the oxalated zerovalent Fe/Ni without graphite (0.16 day −1 ). The determination of Ni leaching showed that no nickel ions were detected post-reaction over a broad pH range (3–11). Moreover, the reactivity of G@Fe OX bm /Ni was largely unaffected across the pH range (0.26–0.49 day −1 ), exhibiting excellent resistance to acidic and alkaline conditions. In both ultrapure water and real groundwater matrices, the degradation rate constants for BDE-47 increased to 2.98 day −1 and 0.79 day −1 , respectively, achieving debromination yields of 97.86 % and 50.18 % for the final product, diphenyl ether. Based on the established degradation pathway and electrochemical analysis, the debromination of BDE-47 follows a catalytic debromination and hydrogenation process by adsorbed atomic hydrogen (H* ADS ). The graphite doping enhanced the debromination of BDE-47 by increasing the production of H* ADS . The adsorption effect of graphite on metal ions effectively controlled secondary pollution and improved the material’s tolerance to acidic and alkaline environments. This work offers an efficient method for the degradation of low brominated diphenyl ether pollutants at a low cost and without secondary risks.
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ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Kuang Wang,Zhanqiang Fang
In the homologous series of polybrominated diphenyl ethers (PBDEs), the debromination of low-brominated diphenyl ethers with higher toxicity remains a challenge. Nano zero-valent iron (nZVI) has been extensively studied for the debromination of PBDEs, but its inherent direct electron transfer mechanism is less efficient for low-brominated diphenyl ethers, and there are issues with high preparation costs. In this work, we synthesize Ni-doped oxalated submicron ZVI (Fe OX bm /Ni) using a low-cost ball-milling method. Fe OX bm /Ni exhibits a debromination rate constant of 0.48 day −1 for 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) in tetrahydrofuran (THF)/water. The debromination rate of Fe OX bm /Ni for BDE-47 in water is even faster (0.98 day −1 ), with the yield of the complete debromination product, diphenyl ether, reaching 76.71%. In real groundwater, Fe OX bm /Ni also shows high reactivity toward BDE-47, with a rate constant of 0.33 day −1 . Kinetic experiments, quenching experiments, and degradation pathway indicate that the attack of atomic hydrogen on C-Br bonds is the primary degradation mechanism. Electrochemical analysis further show that Ni 0 sites could cleave hydrogen into absorbed atomic hydrogen (H∗ ABS ) and adsorbed atomic hydrogen (H∗ ADS ), with H∗ ADS playing the main role. These findings contribute valuable insights into advancing the large-scale application of ZVI and offer promising strategies for thorough remediation of PBDEs pollution.
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Batteries-Basel
·
2025
·Vol. 11
·期 3
·83
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IF 4.8
Yongli Tong,Baoqian Chi,Yu Jiang,Xiang Wu
It is crucial for energy storage devices to construct electrode materials with excellent performance. However, enhancing energy density and cycling stability for supercapacitors is a significant challenge. We successfully synthesized CoNi2S4@Ni(OH)2nanosheets on the surface of Ni foam substrate by a two-step hydrothermal approach. The obtained products exhibit a remarkable areal capacitance of 1534 F g−1at a current density of 1 A g−1. Moreover, even after 10,000 cycles, the specific capacitance remains 90% of its initial value, highlighting the exceptional long-term stability and durability. Furthermore, an asymmetric supercapacitor (ASC) device incorporating the CoNi2S4@Ni(OH)2material shows remarkable electrochemical performance. It delivers an energy density of 58.5 mW h g−1at a power density of 2700 W kg−1. The outstanding performance mainly arises from the selection of materials, the design of the structure, and the synergistic interaction between the materials. The result suggests that this material holds great potential as an energy storage material.
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Nano Today
·
2024
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IF 13.2
Fei Sun,Shipeng Ning,Xiaoyuan Fan,Xia Wang,Ziqi Lin,Jian Zhao,Yutong Lu,Fengxiang Liu,Lili Du,Hao Zhang,Wenwen Shen,Jiaxin Lin,Zhonggui He,Kaiyuan Wang,Jin Sun
Immunotherapy for triple-negative breast cancer (TNBC) is hindered by its immunologically "cold" microenvironment, reducing treatment efficacy. Converting cold tumors into hot ones can significantly enhance the efficacy of immunotherapy. Nevertheless, the tumor extracellular matrix-associated physical barriers impede the infiltration of immunomodulating agents. Our previous research suggested that extracellular vesicles (EVs) secreted in situ by tumor cells could mediate the intercellular transport and deep infiltration of antitumor drugs. However, EVs’ application faces obstacles such as inefficient delivery, lack of specificity, low production yields, and manufacturing inconsistencies. Based on this, we explored artificial cytomembrane nanovesicles (NVs) as the biomimetics of EVs. Herein, NVs are genetically engineered with membrane fusion-promoting protein VSVG to form VSVG-NVs (V-NVs). The calcium ionophore A23187 and plasmid encoding TNF-α with Lamp2b are loaded into V-NVs (V-NVs/T+A) using electroporation technology. The fusogenic VSVG component facilitates the integration of NVs with the target cancer cells and further incorporation into secreted EVs. The A23187 enhances EVs secretion by increasing intracellular calcium level. This synergistic approach ensures efficient intracellular delivery of TNF-α through EVs, facilitating deep tumor infiltration and remodeling of the immune microenvironment. As expected, the EV-hitchhiking strategy for cascade tumor deep penetration and immune microenvironment modulation demonstrates significant potential to enhance cancer immunotherapy.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yandai Lin,Xinru Kong,Zhe Liu
Nitric oxide (NO)-based gas therapy has attracted increasing attention as a promising approach for tumor treatment, but elevated levels of glutathione (GSH) in the tumor microenvironment significantly limit their therapeutic effectiveness. In this study, a type of engineered photoactivatable nanomicelles Ce6/NI@PEP@HA (CNPH) were developed for combinational photodynamic and NO gas therapy. CNPH was capable of targeted accumulation to tumors, where it depleted GSH and released NO to effectively produce reactive oxygen species (ROS) with oxidative damage under laser irradiation at 660 nm. The GSH consumption induced the deactivation of glutathione peroxidase activity, leading to enhanced accumulation of toxic lipid peroxide and enabled a ferroptosis-like therapeutic outcome. Additionally, the effective production of NO and ROS resulted in mitochondrial dysfunction, characterized by the disruption of mitochondrial membrane potential and decreased adenosine triphosphate concentration. The in vivo animal experiments indicated that the combinational photodynamic and NO gas therapy achieved a tumor inhibition of 89.1%, and it has proven to be a more effective tumor therapy strategy in contrast to any single modality. In consequence, ferroptosis-like combinational tumor therapy has opened up a new horizon to a cutting-edge and noninvasive paradigm for advanced tumor treatments.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Jiawen Hu,Linwen Jiang,Jiawei Jin,Hang Liu,Anhua Wu,Xiaofeng Zhang
High-entropy alloys (HEAs) are important candidates for efficient electromagnetic-wave absorbing (EMA) materials, but the further design of HEA absorbers with harmonized impedance matching and excellent environmental stability remains a major challenge. In this study, a novel carbonitriding process based on a mechanochemical method is employed to prepare carbonitrided FeCoNiMn HEAs by utilizing a cyano-compound (C3H2N2) as a source of C and N. The introduction of C and N effectively optimizes the permittivity of FeCoNiMn HEAs, achieving the equilibrium of electromagnetic matching and thus improving the EMA performances (especially the bandwidth). The carbonitrided FeCoNiMn HEAs exhibit significant reflection loss (RL) and absorption capability. FeCoNiMnM0.04 achieves a minimum RL of −65.8 dB at 3.44 GHz. FeCoNiMnM0.08 achieves an ultra-broad effective absorption bandwidth (EAB) of up to 7.76 GHz at 1.62 mm, covering the entire Ku-band. In addition, the carbonitrided FeCoNiMn HEAs exhibit excellent corrosion resistance and good mechanical properties, ensuring their suitability for harsh environments. This study highlights the potential of carbonitrided HEAs prepared using a cyano-compound as highly efficient EMA materials, and provides a reference for optimizing the electromagnetic matching of HEAs.
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Metals
·
2024
·Vol. 14
·期 10
·1142
·
IF 2.6
Jiabao Li,Yang Cai,Jianling Huang,Shiqian Zhao,Deliang Cheng
Mg-based alloy anodes suffer from severe corrosion in alkaline electrolytes, which substantially impedes their cycle life and thereby limits their suitability as anode materials for nickel–metal hydride (Ni-MH) batteries. This work modifies the conventional 6 M KOH electrolyte by adding 0.1 M Al2(SO4)3·18H2O. The electrochemical hydrogen storage properties of Mg0.45Ti0.05Ni0.50alloy in this electrolyte and its microstructural evolution during cycling are studied. In the 6 M KOH + 0.1 M Al2(SO4)3·18H2O electrolyte, a protective layer consisting of Mg2Al(OH)7is formed on the surface of the Mg0.45Ti0.05Ni0.50alloy anode during charge/discharge cycling instead of Mg(OH)2, effectively preventing further corrosion and improving its cycle life. The Mg0.45Ti0.05Ni0.50alloy anode delivers a maximum discharge capacity of 479.0 mAh g−1and maintains 318.4 mAh g−1after 30 cycles in the 6 M KOH + 0.1 M Al2(SO4)3·18H2O electrolyte, which is significantly superior to that achieved in the 6 M KOH electrolyte (471.1 mAh g−1and 201.8 mAh g−1, respectively). This work provides a new strategy for improving the cycle stability of Mg-based alloy anodes.
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Advanced Science
·
2024
·Vol. 11
·期 41
·2405544
·
IF 14.3
Kejun Wang,Siyuan Chen,Guanyu Bao,Tao Sun,Junqiu Zhang,Daobing Chen,Lining Sun,Zhiwu Han,Chao Liu,Qian Wang
Numerous plants evolve ingeniously microcantilever-based hairs to ultra-sensitively detect out-of-plane quasi-static tactile loads, providing a natural blueprint for upgrading the industrial static mode microcantilever sensors, but how do the biological sensory hairs work mechanically? Here, the action potential-producing trigger hairs of carnivorous Venus flytraps ( Dionaea muscipula ) are investigated in detail from biomechanical perspective. Under tiny mechanical stimulation, the deformable trigger hair, composed of distal stiff lever and proximal flexible podium, will lead to rapid trap closure and prey capture. The multiple features determining the sensitivity such as conical morphology, multi-scale functional structures, kidney-shaped sensory cells, and combined deformation under tiny mechanical stimulation are comprehensively researched. Based on materials mechanics, finite element simulation, and bio-inspired original artificial sensors, it is verified that the omnidirectional ultra-sensitivity of trigger hair is attributed to the stiff-flexible coupling of material, the double stress concentration, the circular distribution of sensory cells, and the positive local buckling. Also, the balance strategy of slender hair between sensitivity and structural stability (i.e., avoiding disastrous collapse) is detailed revealed. The unique basic biomechanical mechanism underlying trigger hairs is essential for significantly enhancing the performance of the traditional industrial static mode microcantilever sensors, and ensure the stability of arbitrary load perception.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Yanling Wang,XueYi Zhao,YaXiao Cui,Xianan Wang,Yu Wang,Yanru Liu,Mingming Zhang,Lei Wang
The keys to future energy transformation is the development of stable and efficient non-precious electrocatalysts . Here, we demonstrate a novel synthesis method for ultra-thin carbon coated Ni 3 N nanosheets supported by carbon array with bionic flower structure in-situ grown on nickel foam (C@Ni 3 N@C/NF), in which the hollow carbon rods supporting the carbon-coated Ni 3 N nanosheets at the bottom. And the hollow carbon rod can accelerate the transport of electrons to the ultra-thin 2D Ni 3 N nanosheet through a one-dimensional directional structure. The obtained C@Ni 3 N@C/NF as a monometallic nickel-based catalyst exhibits excellent HER electrocatalytic performance in 1 M KOH, which only need the overpotential of 60 mV to reach the current density of −10 mA cm −2 . More importantly, this method can provide new ideas for the synthesis of other non-precious metal electrocatalysts with biomimetic structure.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xu Chen,Yunrui Duan,Huanglin Dou,Wensheng Zhang,Xiaomin Wang
The development of transition metal phosphides (TMPs) electrocatalysts with appropriate binding strength towards intermediates and resistant to chlorine in alkaline seawater electrocatalysis remains a formidable challenge. Herein, an approach for manipulating electron redistribution in Ni 2 P/Ni 5 P 4 treated by Co cationic doping engineering (denoted as Act-Co-NiPx) is proposed, exhibiting excellent catalytic activities and stability toward HER in alkaline seawater solution. First-principles calculations demonstrate that the Co doping can effectively adjust the electron redistribution of Ni 2 P/Ni 5 P 4 , resulting in a reduction in the hydrogen adsorption free energy for HER and an acceleration in the interfacial charge transfer. Furthermore, the enhanced Cl - adsorption energy avoids the toxicity of Cl - to the active sites in alkaline seawater splitting. Consequently, the resulting Act-Co-NiPx catalyst demonstrates remarkable HER performance with low overpotentials of 77 and 97 mV at a current density of 10 mA cm −2 in both 1.0 M KOH and 1.0 M KOH+Seasalt electrolytes. Furthermore, the seasalt electrolyzer assembled from Act-Co-NiPx achieves the low cell voltage of 1.63 V at 10 mA cm −2 . This work demonstrates a feasible method for designing cost-effective and stable catalysts with excellent selectivity via regulating the electronic structure of TMPs for seawater electrolysis.
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