LANGMUIR
·
2022
·
IF 4.331
Junjie Si,Shuai Zhang,Xiuming Liu,Kuanjun Fang
Reactive dyes are widely used in textile industry, but their excessive use has caused several water pollution problems. In order to reasonably treat printing and dyeing wastewater, the highly efficient adsorbent for reactive dyes employed in this study is a new type metal–organic framework (MOF) material. Ni/Co MOF (NCM) was synthesized using the solvothermal method; then, the materials were analyzed by a series of characterization methods. This study mainly investigated the adsorption properties of NCM toward reactive dyes, and the adsorption capacities of NCM toward reactive red 218 were up to 200 mg·g–1. The results were found to conform to the Langmuir isotherm model, and the pseudo-second-order kinetic model by performing kinetic and isotherm studies on the adsorption process of reactive red 218 on NCM. The results of the intraparticle diffusion model suggest that the binding of reactive red 218 to NCM was mainly divided into three steps: adsorption, diffusion, and saturation. Moreover, it was concluded by thermodynamic fitting of the adsorption process that the adsorption of reactive red 218 by NCM proceeded spontaneously and was accompanied by an endothermic reaction, in which the adsorption of both occurred mainly by electrostatic attraction. The NCM has good reusability and still has good adsorption performance after being reused 5 times. Therefore, NCM is a very promising and excellent adsorbent for the treatment of dye wastewater because of its high efficiency and reusability.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Heliyon
·
2024
·
IF 3.4
Yige Yan,Mohan Huang,Yongsheng Wang,Dawei He,Jiaqi He
Metal-organic frameworks (MOF) have been wildly synthesised and studied as electrode materials for supercapacitors, and bimetallic MOF of Ni and Co has been broadly studied to enhance both specific capacitance and stability of supercapacitors. Herein, a best performance (about 320 F/g) of Ni–Co bimetallic MOF was found in a uniform preparation condition by adjusting the ratio of Ni to Co. Then tiny third metal ion was introduced, and we found that the morphology of material has a significant change on the original basis. Furthermore, certain ions (Zn, Fe, Mn) introduced make a huge improvement in capacitance based on Ni–Co MOF of 320 F/g. The result shows that Zn–Ni–Co MOF, Fe–Ni–Co MOF and Mn–Ni–Co MOF perform specific capacitance of 1135 F/g, 870 F/g and 760F/g at 1 A/g, respectively. Meanwhile, the asymmetric supercapacitor (ASC) was constructed by Zn–Ni–Co MOF as positive electrode and active carbon (AC) as negative electrode. The Zn–Ni–Co MOF//AC ASC possesses a energy density of 58 Wh/kg at a power density of 775 W/kg. This research provides a new methods to regulate the morphology of MOF and a novel viewpoint for assembling high-performance, low-price, and eco-friendly green energy storage devices.
研究领域:
材料科学
·
能源存储技术
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DOI
PubMed
高影响因子
Biosensors-Basel
·
2024
·Vol. 14
·期 6
·276
·
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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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
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
·
催化反应
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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
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wei Wang,Jianguo Si,Liguo Yue,Weicai Zhang,Qingqing Chen,Haoliang Huang,Fei Lin,Yang Zhao,Sheng Meng,Lifeng Liu
The shuttle effect and sluggish redox kinetics of lithium polysulfides (LiPSs) are generally regarded as main obstacles to practical applications of the promising high energy density lithium-sulfur batteries (LSBs). Using electrocatalysts to expedite LiPSs conversion during charge/discharge has recently become an effective approach to improving LSB performance, but developing highly efficient catalysts active for bidirectional LiPSs conversion both involving multiple electron transfer steps remains a great challenge. Herein, we report the synthesis of a new composite electrocatalyst consisting of bimetallic nickel/cobalt metal–organic frameworks (Ni/Co-MOF) anchored on highly dispersed amino-modified MXene (Ti 3 C 2 -NH 2 , i.e., TCN) supports through a simple one-step hydrothermal method. Density functional theory (DFT) calculations demonstrate that incorporating both Ni and Co species into MOF results in significant electronic coupling effect, making the d-band centers of Ni and Co sites in Ni/Co-MOF@TCN become comparable and the composite catalyst shows similar adsorption and dissociation capability toward LiPSs. Such a synergy between Ni and Co sites has been validated by comprehensive experimental characterization, which confirms that Ni/Co-MOF@TCN has moderate binding strength for LiPSs adsorption/dissociation, so that both Ni and Co can effectively boost the kinetics and thermodynamics of the bidirectional conversion of LiPSs. Consequently, LSBs containing Ni/Co-MOF@TCN as sulfur hosts exhibit a high specific capacity of 1465 mAh g −1 at 0.1 C and excellent stability at 1 C for 600 cycles with a low decay rate of 0.052 % per cycle. Even with a high sulfur loading of 6.8 mg cm −2 and a low electrolyte/sulfur (E/S) ratio of only 5 μL mg −1 , the Ni/Co-MOF@TCN-containing LSBs can still deliver an initial areal capacity of 6.81 mAh cm −2 at 0.1 C. Moreover, Ni/Co-MOF@TCN also shows outstanding performance in single-layer Li-S pouch cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2026
·
IF 4.3
Yutong Feng,Hui Sun,Xinyu Liu,Huiping Wu,Gaoyuan Chen,Afang Gao,Shijie Wang,Jiahui Zhou,Bin Yu
Flexible electrochemical sensors based on noninvasive materials can continuously monitor blood glucose levels in sweat, making them ideal for personal diabetes management intelligent devices. It is necessary to construct sweat glucose electrochemical sensors that have the ability to both adjust to human skin and reliably monitor. We first synthesized nickel/cobalt metal–organic framework material (Ni/Co-MOF) nanosheets via a solvent-thermal approach. Then, an oil-based polyurethane (OPU)/polypropylene spun-bonded nonwoven fabric (PPSF) was obtained by coating the surface of PPSF. Silver/silver chloride (Ag/AgCl) paste and conductive carbon (C) paste were printed layer-by-layer on the surface of the OPU/PPSF by screen printing, followed by the immobilization of Ni–Co/MOF nanosheets on the working area using a Nafion solution to form a Ni/Co-MOF@OPU/PPSF flexible glucose sensor for continuous monitoring of glucose in sweat. This Ni/Co-MOF@OPU/PPSF flexible glucose sensor retained the high electrocatalytic activity of Ni/Co-MOF for glucose oxidation and exhibited high sensitivity (159.9 μA/mM·cm2), low limit of detection (LOD) (2 μM), and a wide linearly glucose-monitoring range (10 μM–1 mM). Compared to other nonenzymatic sensors, our Ni/Co-MOF@OPU/PPSF flexible glucose sensor has better immunity than other substances present in sweat. Meanwhile, the Ni/Co-MOF@PPSF flexible glucose sensor not only monitors the glucose in sweat at different body temperatures but also maintains good mechanical flexibility and stable electrochemical properties under bending conditions. It is suggested that our flexible glucose sensor can be used for continuous monitoring of glucose in human sweat. Overall, our glucose sensor can be used for the continuous monitoring of glucose in human sweat.
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Gao Haonan,Wen Mingzhen,Li Jiali,Hou Shili,Li Lifen,Liu Guangyan
This work develops an in situ electrodeposition strategy to construct a honeycomb-like Ni/Co-MOF/MXene heterojunction directly on the glassy carbon electrode (GCE) surface at −1.3 V vs. Ag/AgCl, enabling ultrasensitive enzymatic electrochemical detection of trace urea. The high catalytic activity of Ni/Co-MOF and the superior conductivity of MXene were synergistically integrated in a 3D hierarchical heterostructure. Compared with traditional modification methods, this strategy significantly enhances the kinetics of electron transfer and the stability of urease immobilization. Characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), the heterojunction exhibits unique morphology and outstanding electroconductivity. Furthermore, the resulting Ni/Co-MOF/MXene/urease/GCE biosensor achieves a wide linear range of 1.0 × 10 –6 –1.0 × 10 –4 mol L −1 with a low detection limit of 4.9 × 10 –7 mol L −1 . The biosensor has been applied to the detection of practical samples, where the recoveries were 99.3–102.8% with a relative standard deviation (RSD) of 2.9–3.3%, which indicates that this biosensor has good practical applications and prospects for further development.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Zexuan Yang,Yazhou Wang,Xia Lin,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun,Yong Shen Chua
Magnesium-based hydrogen storage materials, such as MgH 2 , have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH 2 . In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH 2 . The synthesized NiCo-MOF/V-O-doped MgH 2 system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H 2 was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H 2 in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol −1 which is significantly lower than that of the ball-milled MgH 2 (i.e., 118.649 ± 2.825 kJ ·mol −1 ). It was therefore inferred that during dehydrogenation process, a Mg 2 Ni/Mg 2 NiH 4 hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH 2 . These experiments provide new perspectives on the commercial application of MgH 2 .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
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
·
电化学
·
能量存储
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Qingfeng Zhou,Yun Gong,Keyu Tao
Binary metal compounds have higher conductivity and richer redox reactions due to the co-existence and synergism of different transition metals. Besides, carbon in composite materials has the advantage of enhancing electronic conductivity to promote fast electron transmission. Herein, a series of Ni m P n /C, Ni 2 P/C, Co 2 P/C and Ni x Co 2-x P/C nanohybrids with different Ni/Co molar ratios were synthesized by in-situ calcination/phosphorization of MOF precursors. These nanohybrid materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive spectrometer and electrochemical tests. The NiCoP/C material possesses a granular structure with NiCoP nanoparticles anchored in a large number of carbon. Taking advantage of the bimetallic synergism and carbon anchoring effect, the as-prepared NiCoP/C sample delivers the most prominent specific capacities of 775.7C g −1 at 1 A g −1 , and 582.4C g −1 at 20 A g −1 (20-fold) with a superior rate capability of 75.1% retention, much superior to those of the corresponding Ni m P n /C, Ni 2 P/C, Co 2 P/C, other Ni x Co 2-x P/C samples and various reported metal phosphide nanostructures/nanocomposites. Furthermore, the constructed NiCoP/C//activated carbon asymmetric supercapacitor can exhibit a high energy density of 47.6 Wh kg −1 at a power density of 798.9 W kg −1 , which was superior to those previously reported of Ni/Co phosphide nanomaterials.
研究领域:
材料科学
·
电化学
·
能源存储与转换
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 43
·25120-25131
·
IF 10.733
Taotao Sun,Liguo Yue,Ning Wu,Mengni Xu,Wenhu Yang,Hao Guo,Wu Yang
High-performance electrode materials were obtained by isomorphism and intercalation methods, resulting in multi-types of redox reaction centers and a bridge for charge transfer. Some of the Co ions (clusters) were replaced by Ni ions with little difference in radius and different types of redox reactions were constructed. At the same time, the introduction of 2-methylbenzimidazole in the intercalation of two-dimensional (2D) Ni/Co-MOF accelerated the charge transfer. The synthetic composite electrode material exhibited high specific capacitance of 2422.7 F g−1 at a current density of 1.0 A g−1 in three systems and cycle retention of 86% after 3000 cycles. An asymmetric supercapacitor device assembled with the composite material and activated carbon exhibited a maximum energy density of 82.8 W h kg−1 at a power density of 700 W kg−1, showing that the composite has good potential application value.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）