JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Zhe Li,Shudi Mao,Ying Yang,Zhuo Sun,Ran Zhao
Capacitive deionization (CDI) is considered one of the most promising desalination technologies for obtaining fresh water from saline water. In this work, we synthesized a hollow core–shell Co-MOF@Fe/Co-LDH (Co-Fe-LDH) material by developing a strategy to simultaneously grow Co/Fe-LDH on the surface of a Co-MOF precursor in situ. Owing to the increase in the specific surface area of the hollow structure and the Faradaic process of a layered double hydroxide (LDH), the Co-Fe-LDH material exhibits high electrical double layer (EDL) capacitance and pseudocapacitance, which significantly improves the salt adsorption of the material during CDI (34.2 mg/g in a 600 mg/L NaCl solution at 1.2 V). The adsorption for NaCl in this work is approximately 2.5 times the maximum salt adsorption capacity (SAC) of LDH materials applied in nonmembrane CDI (NMCDI). This work may provide a promising model for the application of hollow LDH materials that exhibit pseudocapacitance in CDI.
研究领域:
材料科学
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环境工程
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海水淡化技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yan Zhong,Yangyang Liu,Jie Song,Meng Hu,Guanggui Cheng,Jianning Ding
Triboelectric nanogenerators (TENGs) are widely employed in self-powered pressure sensing, yet devices based on a single triboelectric layer have approached their performance ceiling. Herein, a “double triboelectric layer” strategy is proposed to construct a flexible, self-powered, single-electrode pressure sensor. The charge-generation layer employs Co-MOF with high surface area and excellent conductivity, blended into Ecoflex to maximize triboelectric charge output, while the charge-trapping layer incorporates highly electronegative PVDF into Ecoflex to suppress interfacial charge neutralization and expedite charge transport. Benefiting from the biomimetic micro-textured surface created by sandpaper templating, the enhanced charge-storage density afforded by Co-MOF-doped generation layer, and the elevated charge-transfer efficiency introduced by the PVDF-doped trapping layer, the device based on a double triboelectric layer boosts peak voltage to 86 V, which is a 177 % increase compared with the single-layer device (31 V). It delivers an ultrahigh sensitivity of 11.17 V kPa⁻¹ over 0–6 kPa and maintains stable operation beyond 11,00 cycles. With fast response and long-term reliability, the sensor accurately captures human motions and wrist-pulse signals. This architecture pioneers a pathway toward high-performance, self-powered sensors tailored for next-generation wearable electronics.
研究领域:
材料科学
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纳米技术
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传感器
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柔性电子
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能量收集
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Guoliang Gao,Dongwei Wei,Li Li,MingQi Wei,Xueli Chen,Yangyang Yu,Guang Yang,Guang Zhu,Lu Han,Jin Jia
Transition metal phosphates have proved to be promising electrocatalysts for hydrogen evolution reactions (HER) of water splitting, however, further increasing their active sites and catalytic activity remains a major challenge. Herein, accordion-like Co-MOF with layered structure was synthesized. After subsequent carbonization and phosphidization, lamellar heterostructured Co/CoP nanocrystals encapsulated in a P, N co-doped C matrix (Co/CoP@PNC) was obtained. Heterojunction provides abundant active sites and improves electron transfer rate. Additionally, the effect of phosphating degree on the electrocatalytic activity was studied. In the alkaline electrolyte , the current density of the optimized Co/CoP@PNC-10 for HER reached 10 mA cm −2 at overpotential of 137 mV in 1.0 M KOH, which was superior to most of transition metal-based electrocatalysts. This work provides new guidance for the design and development of transition metal-based electrocatalysts.
研究领域:
材料科学
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电化学
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Jie Liu,Qixun Xia,Libo Wang,Qianku Hu,Nanasaheb M. Shinde,Aiguo Zhou
Mo2CTx MXene materials, known for their high conductivity and abundant surface functional groups, are widely utilized as electrode materials in supercapacitors. However, their tendency to stack during electrochemical energy storage hinders their performance. The in situ growth of nanorod-shaped Ni,Co bimetallic metal–organic frameworks (Ni,Co-MOF) on Mo2CTx MXene effectively mitigates this stacking. With their porous structure and high specific surface area, MOFs excel in energy storage, and bimetallic MOFs outperform monometallic ones. The synergy between Mo2CTx MXene and Ni,Co-MOF yields an outstanding performance. In a three-electrode system with 1 M KOH, the Mo2CTx/Ni,Co-MOF composite shows a specific capacitance of 58 mAh g–1 (56.26 mAh cm–3) at 1 A g–1. When used in a Mo2CTx/Ni,Co-MOF//AC asymmetric supercapacitor, it achieves an energy density of 22.7 Wh kg–1(0.022 Wh cm–3) at a power density of 293 W kg–1 (0.284 W cm–3). Future work will focus on enhancing synthesis methods, exploring different bimetallic combinations, and optimizing electrode designs for gas sensors, batteries, fuel cells, biological sensors, and so on, with outstanding performance and sustainability.
研究领域:
材料科学
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电化学
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能量存储
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Wenping Yang,Longjiao Zhu,Wentao Xu
Developing an efficient advanced oxidation technology is of great significance for water treatment and environmental protection. Here, inspired by the structure and feature of coenzyme B 12 in natural enzymes (cleavage of Co-C bond triggers the generation of radical), a Co based metal-organic framework (Co-MOF) with catalase-mimicking activity was synthesized and applied in the degradation of organic dyes. Firstly, Co-MOF nanozyme was fabricated via the coordination self-assembly strategy at room temperature. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive scanning (EDS), powder X-ray diffraction (PXRD), and Fourier transform infrared spectroscopy (FTIR) were used to characterize the morphology and structure. The results showed that the obtained Co-MOF nanozyme was rhombic dodecahedral morphology with a size of ∼ 500 nm and excellent crystallinity. The enzymatic experiments proved that such nanozyme possessed a single catalase-like activity. Further research results demonstrated that Co-MOF-based degradation process of acid fuchsin (AF) or crystal violet (CV) had excellent pH adaptability (pH > 5.0). Unexpectedly, an ultra-high catalytic degradation rate (211.35 min −1 g −1 L) was successfully achieved in the catalytic degradation of AF, and it was approximately 5∼200 times of the previous optimal nanozyme or catalysts. In complex matrices and real wastewater, this catalytic process could still maintain degradation efficiency above 90% or even higher within 5 minutes, proving its excellent stability and adaptability. The results of radical and electron quenching experiments, electron paramagnetic resonance (EPR), and electrochemical analysis demonstrated that the excellent catalytic degradation performance was attributed to the generation of reactive oxygen species (ROS) (∙O 2 was the main contributor) and the existence of electron transfer. In summary, this new catalytic property endows Co-MOF nanozyme with considerable potential for dye degradation, extending the application scope of catalase mimics.
研究领域:
环境科学
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材料科学
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化学
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水处理
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Haiyang Zhang,Junchuan Wang,Ying Sun,Xueqin Zhang,Hong Yang,Baoping Lin
The exploration of an inexpensive, low-energy consumption and environmentally friendly preparation process to synthesize high capacitance performance MOF-based electrode materials is an important prerequisite for their commercialization. We propose a non-calcined strategy to synthesize nanowire microsphere shaped Co-BTC (CBNWM). Making MOF into one-dimensional nanowire structure can effectively increase its active sites and the ion transfer rate. After the MOF nanowires are entangle and reunite into microspheres, their mechanical property and chemical stability are improved. Therefore, compared with Co-BTC crystal (CBC), the electrochemical properties of CBNWM have been significantly improved. The specific capacity of CBNWM reaches 1020 F g −1 at 5 mV s −1 or 657 F g −1 at 0.5 A g −1 with the capacity remains 81.4% after 3000 cycles. Subsequently, a flexible asymmetric device of CBNWM//AC was fabricated, whose maximum energy density can achieve 34.4 W h kg −1 with the related power density of 375.3 W kg −1 .
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Acta Biomaterialia
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2024
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IF 9.4
Cheng Lu,Miao Chen,Yuanyuan Zhao,Yongxin Zhan,Xin Wei,Laijin Lu,Mingxi Yang,Xu Gong
Avoiding ischemic necrosis after flap transplantation remains a significant clinical challenge. Developing an effective pretreatment method to promote flap survival postoperatively is crucial. Cobalt chloride (CoCl 2 ) can increase cell tolerance to ischemia and hypoxia condition by stimulating hypoxia-inducible factor-1 (HIF-1) expression. However, the considerable toxic effects severely limit the clinical application of CoCl 2 . In this study, cobalt-based metal-organic frameworks (Co-MOF) encapsulated in a microneedle patch (Co-MOF@MN) was developed to facilitate the transdermal sustained release of Co 2+ for rapid, minimally invasive rapid pretreatment of flap transplantation. The MN patch was composed of a fully methanol-based two-component cross-linked polymer formula, with a pyramid structure and high mechanical strength, which satisfied the purpose of penetrating the skin stratum corneum of rat back to achieve subcutaneous vascular area administration. Benefiting from the water-triggered disintegration of Co-MOF and the transdermal delivery via the MN patch, preoperative damage and side effects were effectively mitigated. Moreover, in both the oxygen-glucose deprivation/recovery (OGD/R) cell model and the rat dorsal perforator flap model, Co-MOF@MN activated the HIF-1α pathway and its associated downstream proteins, which reduced reperfusion oxidative damage, improved blood supply in choke areas, and increased flap survival rates post-transplantation. This preprotection strategy, combining MOF nanoparticles and the MN patch, meets the clinical demands for trauma minimization and uniform administration in flap transplantation. Statement of significance Cobalt chloride (CoCl 2 ) can stimulate the expression of hypoxia-inducible factor (HIF-1) and improve the tolerance of cells to ischemia and hypoxia conditions. However, the toxicity and narrow therapeutic window of CoCl 2 severely limit its clinical application. Herein, we explored the role of Co-MOF as a biocompatible nanocage for sustained release of Co 2+ , showing the protective effect on vascular endothelial cells in the stress model of oxygen-glucose deprivation. To fit the clinical needs of minimal trauma in flap transplantation, a Co-MOF@MN system was developed to achieve local transdermal delivery at the choke area, significantly improving blood supply opening and flap survival rate. This strategy of two-step delivery of Co 2+ realized the enhancement of biological functions while ensuring the biosafety.
研究领域:
生物医学工程
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药学
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组织工程
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再生医学
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药物递送系统
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产品关联
DOI
PubMed
高影响因子
POLYHEDRON
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2024
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IF 2.4
Meng Zhao,Yun Yang,Xue-Song Gu,Lanlan Sun
The separation and purification of light hydrocarbons are performed by energy-intensive distillation processes. Microporous metal–organic framework based absorbents acting as alternative technology gains focus. Open metals sites (OMSs) enriched MOF-74 show great potential in light hydrocarbons but its separation selectivity is low and difficult to regenerate. To address this issue, we introduced N -donor ligands into open sites of Co-MOF-74 by post modification. Structure was determined by powder X-ray diffraction, element analysis, infrared spectroscopy and thermogravimetric analyses. As-synthesized modified Co-MOF-74 display potential in C 2 H 4 /C 2 H 6 , C 3 H 6 /C 3 H 8 , C 3 H 8 /CH 4 and C 2 H 6 /CH 4 separation for N -donor ligands placeholder.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Biosensors-Basel
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2024
·Vol. 14
·期 6
·276
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IF 4.9
Zongbao Sun,Zhiwei Wu,Yiran Zong,Chen Li,Wang Guo,Yiqing Guo,Xiaobo Zou
Metal–organic frameworks (MOFs) are frequently utilized as sensing materials. Unfortunately, the low conductivity of MOFs hinder their further application in electrochemical determination. To overcome this limitation, a novel modification strategy for MOFs was proposed, establishing an electrochemical determination method for cyanides in Baijiu. Co and Ni were synergistically used as the metal active centers, with meso−Tetra(4−carboxyphenyl)porphine (TCPP) and Ferrocenecarboxylic acid (Fc−COOH) serving as the main ligands, synthesizing Ni/Co−MOF−TCPP−Fc through a hydrothermal method. The prepared MOF exhibited improved conductivity and stable ratio signals, enabling rapid and sensitive determination of cyanides. The screen−printed carbon electrodes (SPCE) were suitable for in situ and real−time determination of cyanide by electrochemical sensors due to their portability, low cost, and ease of mass production. A logarithmic linear response in the range of 0.196~44 ng/mL was demonstrated by this method, and the limit of detection (LOD) was 0.052 ng/mL. Compared with other methods, the sensor was constructed by a one−step synthesis method, which greatly simplifies the analysis process, and the determination time required was only 4 min. During natural cyanide determinations, recommended readouts match well with GC−MS with less than 5.9% relative error. Moreover, this electrochemical sensor presented a promising method for assessing the safety of cyanides in Baijiu.
研究领域:
分析化学
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食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yu Liu,Xuanzhi Wang,Xingyu Lu,Di Wang,Wenze Li,Yu Fu,Wei Qi
Addressing the critical scientific challenge of enhancing the catalytic efficiency of transition metal-based metal–organic framework (MOF) materials in the two-electron oxygen reduction reaction (2e– ORR) for the electrochemical synthesis of H2O2 is of paramount importance in a related field. In this context, we had developed an interface synthetic strategy for constructing a series of bimetallic Ni–M (M = Co, Fe, Cu) center MOFs. This approach capitalized on the strong synergy among metallic ions, effectively regulating the electronic structure and thereby improving the catalytic activity of Ni active sites. Notably, the proposed Ni–Co MOF catalyst demonstrated exceptional 2e– ORR activity, achieving a remarkable H2O2 selectivity of up to 96%. This performance significantly surpassed that of Ni–Fe (54%) and Ni–Cu (67%) MOFs, as well as many other reported transition metal catalysts. Detailed studies on the structure–function relationship at the atomic level unveiled that Ni species in a high oxidation state, effectively regulated and stabilized by adjacent Co2+ ions, played a pivotal role in ensuring the superior 2e– ORR activity of the Ni–Co MOF. These physical-chemical insights into the reaction mechanism and structure–function relationships offer valuable guidance for the rational design of highly efficient MOF-based catalysts and reaction systems for on-site electrochemical synthesis of H2O2 via a 2e– ORR process.
研究领域:
材料科学
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电化学
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催化反应
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Dan Wang,Hanlin Wang,Juanjuan Fan,Hancheng Zhu,Akira Fujishima,Xintong Zhang
Photoelectrochemical (PEC) performance of photoanode is limited by the cascade-dynamic processes, mainly including light absorption , charge separation, and surface reaction. This work adopted a strategy of nanocones modification on FTO substrate (FTO-NC) to enhance light utilization and photoelectrons collection for improved PEC water splitting . Comparative studies showed that FTO-NC enhanced the light scattering, promoting the conversion process of photon to electron/hole and enlarging the effective surface area of BiVO 4 for surface reaction. Meanwhile, cooperative Mo-doping and Co-MOF decoration improved the bulk electron transportation in BiVO 4 , hole migration towards the electrode surface , and accelerated the water oxidation reaction of photogenerated holes. The photocurrent density of FTO-NC/BiVO 4 -Mo/MOFs reached 3.56 mA cm −2 , 6.14 times that of pristine BiVO 4 . The IPCE of FTO-NC/BiVO 4 -Mo/MOFs photoanode achieve 60% at 1.23 V vs. RHE, demonstrating a significantly enhanced light utilization performance. This work presents new insight into boosting cascade-dynamic processes through collaborative strategies for highly efficient PEC water-splitting.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Li Tian,Ronghua Chen,Yabin Zhang,Qiang Zheng,Xingyu Wang,Jiang Tan,Junhong Guo,Bo Mu,Xuemei Bao
A functionalized cross-linked polyphosphazenes microsphere (Salen-PZN-Ni@Co-MOF) was fabricated by enveloping Salen-Ni-based polyphosphazenes (Salen-PZN-Ni) with a type of hybrid flame retardant (Co-MOF) to enhance the flame retardant, smoke suppression properties and mechanical properties of epoxy (EP) composites. Thermogravimetric analysis indicated that the incorporation of Salen-PZN-Ni@Co-MOF significantly enhanced the thermal stability of the EP composites. The existence of Salen-PZN-Ni@Co-MOF enhanced both the vertical burning rating and resulted in a higher limiting oxygen index. The addition of 5 wt% Salen-PZN-Ni@Co-MOF conspicuously improved the fire safety of EP, as evidenced by the results of the cone calorimeter. For instance, the peak heat release rate and total heat release rate of the EP composites were decreased by 25.3% and 44.97%, respectively. In addition, the incorporation of Salen-PZN-Ni@Co-MOF significantly inhibited the generation of toxic carbon monoxide and other volatile compounds. Furthermore, a synergistic effect between Salen-PZN-Ni and Co-MOF was observed. The proposed flame retardant mechanism of Salen-PZN-Ni@Co-MOF is attributed to the synergistic catalytic carbonization effect and the formation of thermally stable components. Consequently, enhanced fire safety in EP composites is achieved through the synergistic interaction among various components (nickel and Co-MOF) with polyphosphazene microspheres. Meanwhile, the excellent compatibility between Salen-PZN-Ni@Co-MOF and EP enhances the mechanical properties of EP composites.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）