TALANTA
·
2023
·
IF 6.1
Jianwei Liang,Zhiyang Huang,Kuiyu Wang,Liren Zhang,Yuhao Wan,Tao Yang,Hui Zeng
Various methods have been made to achieve sensitive detection (10 CFU/mL) of Escherichia coli O157:H7 ( E. coli ) in real samples, however, they are complex, time-consuming, or instrument-dependent. Enzyme-catalyzed reactions are one of the most efficient methods to amplify signals for sensitive detection. ZIF-8 owning stability, porosity, and high specific area are suitable for embedding enzymes which can effectively protect enzyme activity and thus improve detection sensitivity. Herein, a simple visual assay of E. coli with the limits of detection of 1 CFU/mL was developed based on this stable enzyme-catalyzed amplified system. A microbial safety test of milk, orange juice, seawater , cosmetic, and hydrolyzed yeast protein, was successfully performed with the limits of detection of 10 CFU/mL by the naked eye. And this bioassay possessed high selectivity and stability making the developed detection method practically promising.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jie Zhang,Zhishang Li,Qi Zhang,Lin Zhang,Tongtong Ma,Xinyue Ma,Kang Liang,Yibin Ying,Yingchun Fu
Balancing the trade-off between permeability and selectivity while realizing multiple sieving from complex matrices remains as bottlenecks for membrane-based separation. Here, a unique nanolaminate film of transition metal carbide (MXene) nanosheets intercalated by metal–organic framework (MOF) nanoparticles was developed. The intercalation of MOFs modulated the interlayer spacing and created nanochannels between MXene nanosheets, promoting a fast water permeance of 231 L m–2 h–1 bar–1. The nanochannel endowed a 10-fold lengthened diffusion path and the nanoconfinement effect to enhance the collision probability, establishing an adsorption model with a separation performance above 99% to chemicals and nanoparticles. In addition to the remained rejection function of nanosheets, the film integrated dual separation mechanisms of both size exclusion and selective adsorption, enabling a rapid and selective liquid phase separation paradigm that performs simultaneous multiple chemicals and nanoparticles sieving. The unique MXenes-MOF nanolaminate film and multiple sieving concepts are expected to pave a promising way toward highly efficient membranes and additional water treatment applications.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hong Ma,Zhongguo Wang,Xiong-Fei Zhang,Jianfeng Yao
With bacterial cellulose (BC) as the skeleton, bimetallic CoZn-MOF (bi-MOF) was integrated into BC networks through an in situ growth approach. After carbonization at 600 °C, a highly porous, lightweight, conductive, compressible, and hydrophobic aerogel was obtained. Characterization results revealed that the MOF-derived magnetic Co/ZnO species are inlaid in the carbon matrix and dispersed uniformly. As-prepared composite aerogels were investigated for electromagnetic wave absorption. The optimized CZn-2 sample presented a total shielding effectiveness (SE T ) of 46.5 dB (X band, 8.2–12.4 GHz) at a thickness of 3 mm. The absorption shielding effectiveness (SE A ) and the absorption proportion were determined to be 45.9 dB and 98.7%, respectively. The superior performance was attributed to the synergy of the conduction loss and magnetic loss, as well as the unique porous structure of aerogel. The hybrid aerogel also had an efficient electrothermal response, enabling its normal function in cold conditions. Moreover, the hybrid aerogel can be processed into a sensitive sensor for strain monitoring and displayed a high sensitivity for various human movements.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Xuezhi Liu,Qian Liang,Lining Chen,Junyan Tang,Junjie Liu,Mi Tang,Zhengbang Wang
Construction of polymer-based electrolytes with excellent mechanical properties and high ionic conductivity is highly desirable for solid-state lithium–metal batteries. Herein, a scalable strategy is suggested to achieve the high strength and high performance polymer-based solid-state electrolyte via filling polyethylene oxide (PEO)/Li-salt (LiTFSI) electrolyte into an interconnected metal–organic framework (MOF) network based on the typical hot-pressing process, in which the MOF network is grown on the polyacrylonitrile (PAN) electrospun fibrous membrane through an automated layer-by-layer (LbL) assembly spraying technique. The MOF network not only promises excellent mechanical properties and high thermal stability but also enhances ionic conductivity due to the resulting interconnected Li+ transport paths. In addition, such electrolyte also demonstrates a high Li+ transference number (0.68) and a wide electrochemical stability window (5.2 V). As a result, the assembled Li//Li symmetrical cell shows an ultrastable cycling performance even after cycling for 1800 h. Furthermore, its LiFePO4//Li full cell exhibits a high capacity of up to 120 mAh g–1 at 1 C and 30 °C and can maintain a rather high capacity retention of 95% after 160 cycles. This study provides some inspirations for the fabrication of high performance polymer-based solid-state electrolytes in a large scale.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yixi Xu,Yufei Huang,Jia Zhao,Xuhui Han,Chunpeng Chai,Huiling Ma
Two-dimensional nanomaterial MXene Ti 3 C 2 T x with excellent electrical conductivity has received extensive attention in the electromagnetic wave (EMW) absorption field. However, the excessively high permittivity of Ti 3 C 2 T x is not conducive to impedance matching and the absorption of EMW. Considering the low permittivity and mesoporous structure of MOF , in this work, Co/La-MOF were in situ growth on the surfaces of Ti 3 C 2 T x by a facile co-solvothermal method. The obtained Co/La-MOF anchored on Ti 3 C 2 T x (Co/La-MOF/Ti 3 C 2 T x ) composite exhibits low density with excellent EMW absorption performance. Co/La-MOF/Ti 3 C 2 T x -2 (Co 2+ /La 3+ mass ratio of 16:3) shows the minimum reflection loss of − 44.15 dB at 4.00 GHz with the effective absorption bandwidth of 3.67 GHz in the frequency range of 14.03–17.70 GHz under 1.3 mm. In addition, the electromagnetic absorption mechanism of Co/La-MOF/Ti 3 C 2 T x was also investigated. It provides an effective strategy for the preparation of a novel absorber with high EMW absorbing performance.
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IONICS
·
2022
·Vol. 29
·期 2
·721-732
·
IF 2.961
Dai Jianfeng,Li Zhaokuan,Yu Rui,Su Hao,Wang Qing
The combination of transition metal compounds and carbon materials is considered effective in optimizing electrode material performance. In this work, some simple methods are used to embed bimetallic phosphides into carbon material frameworks to form heterostructures. The process includes the in situ growth of cobalt-based zeolitic imidazole frameworks on rGO, the formation of bimetallic hydroxides by Ni 2+ etching, and further high-temperature phosphating to form a NiCoP/rGO hollow nanocomposite. Benefiting from the synergistic effect between NiCoP and rGO, NiCoP/rGO-20 exhibits the best electrochemical properties, has a high specific capacity of 250.9 mAh g −1 at a current density of 1 A g –1 , and has good rate performance (62.7% retention at 10 A g –1 ). Furthermore, a hybrid supercapacitor was assembled with NiCoP/rGO-20 as the positive electrode and activated carbon (AC) as the negative electrode. The NiCoP/rGO-20//AC HSC device has a high energy density of 60.6 Wh kg –1 at a power density of 749 W kg –1 as well as excellent cycling stability with 83.7% capacitance retention after 10,000 cycles at 10 A g –1 . This work provides a new strategy for the development of high-performance energy storage composites.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Keru Cao,Fangyu He,Jun Yan,Weiwei Zhu,Yanan Wang,Yuheng Zhang,Biao Zhang,Xiaohua Yu,Qingfeng Shen,Chunxia Liu,Qi Wang
Electrochemical detection techniques are not sensitive in detecting isomers with similar structures and properties due to the disadvantages of some sensors such as instability, poor selectivity and susceptibility to environmental interference. Therefore, calcined metal–organic framework structure (Bi-MOF) was used to prepare its derivative Bi@C nanocomposites, and materials with multiple surface active sites and large specific surface area were developed to improve the current response signal of the detected substance. The morphology and structure of the prepared Bi@C were tested by XRD, SEM and other characterisation means. The electrochemical response of Bi@C nanocomposites was studied using an electrochemical workstation for hydroquinone (HQ) and catechol (CC) electrochemical detection. An electrochemical method was developed for the simultaneous determination of hydroquinone and catechol in a simple and highly selective manner. Differential pulse voltammetry (DPV) was used for simultaneous detection of HQ and CC. The results show that Bi@C electrode can detect isomers with high selectivity. Bi@C was detected in the range of 2–600 μM and 2–800 μM for HQ and CC, respectively, in pH = 7 solution. The detection limits were 0.14 μM and 0.12 μM(S/N = 3), respectively. The sensor is successfully applied to detect HQ and CC of real samples and has low detection limit, good recovery, high selectivity, stability and reproducibility. It provides a new idea for electrochemical detection.
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ACS Biomaterials Science & Engineering
·
2023
·
IF 5.8
Ying Zhou,Min Tian,Ruichun Li,Yan Zhang,Guomei Zhang,Caihong Zhang,Shaomin Shuang
An electrochemical sensor applied for dopamine (DA) detection was constructed. An easy static way was used to synthesize bimetallic CoNi-MOF. Next, it was mixed with graphene oxide (GO) under ultrasound to get a uniform suspension. Subsequently, the solution was coated on the glassy carbon electrode (GCE) to form CoNi-MOF@ERGO/GCE by the electrochemical reduction method. The interaction between CoNi-MOF and electrochemically reduced graphene oxide (ERGO) enhances the electrocatalytic performance for DA detection. CoNi-MOF@ERGO/GCE has a wider linear range (0.1–400 μM) and a lower detection limit (0.086 μM) under optimum conditions. Furthermore, it has been applied to test DA in human serum samples. The results reveal that the DA sensor shows excellent performance, which will provide a novel idea for more sensitive and quicker DA detection.
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高影响因子
Nanoscale
·
2023
·Vol. 15
·期 34
·14165-14174
·
IF 6.7
Hai Huang,Yu Zhao,Haowei Yang,Jie Li,Yulong Ying,Jinhua Li,Sheng Wang
Three-dimensional motion (especially in the Z-axis direction) of metal–organic frameworks (MOFs)-based micromotors (MOFtors) is essential but still in its infancy. Herein, we propose a simple strategy for designing light-driven MOFtors that move in the Z-axis direction and efficiently kill Staphylococcus aureus (S. aureus). The as-prepared polypyrrole nanoparticles (PPy NPs) with excellent photothermal properties are combined with ZIF-8 through a simple in situ encapsulation method, resulting in multi-wavelength photothermally-responsive MOFtors (PPy/ZIF-8). Under the irradiation of near-infrared (NIR)/ultraviolet (UV)/blue light, the MOFtors all exhibited negative phototaxis and high-speed motion behaviour with the highest speed of 2215 ± 338 μm s−1. In addition, it is proved that these MOFtors can slowly self-float up in an aqueous environment. The light irradiation will accelerate the upward movement of the MOFtors, and the time required for the MOFtors to move to the top is negatively correlated with the light intensity. Finally, efficient antibacterial performances (up to 98.89% against S. aureus) are achieved with these light-driven MOFtors owing to the boosted Zn2+ release by vigorous stirring motion and physical entrapment by the upward motion under light irradiation.
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Haiping Lei,Jiguo Tu,Suqin Li,Jiacheng Wang,Zheng Huang,Zhijing Yu,Shuqiang Jiao
Aluminum-selenium (Al-Se) batteries, which possess a high theoretical specific capacity of 1357 mA h g −1 , represent a promising energy storage technology. However, they suffer from significant attenuation of capacity and low cycle life due to the shuttle effect. To mitigate the shuttle effect induced by soluble selenium chloroaluminate compound that tends to migrate towards the negative electrode, a quasi-solid-state Al-Se battery was fabricated through the synthesis of a multi-aperture structure quasi-solid-state electrolyte (MOF@GPE) based on metal–organic framework (MOF) material and gel-polymer electrolyte (GPE). The high ionic conductivity (1.13 × 10 −3 S cm −1 ) of MOF@GPE at room temperature, coupled with its wide electrochemical stability window (2.45 V), can facilitate ion transport kinetics and enhance the electrochemical performance of Al-Se batteries. The MOF@GPE-based quasi-solid-state Al-Se batteries exhibit outstanding long-life cycling stability, delivering a high specific discharge capacity of 548 mA h g −1 with a maintained discharge specific capacity of 345 mA h g −1 after 500 cycles at a current density of 200 mA g −1 . The stable ion transmission and high ion transport kinetics in MOF@GPE can be attributed to the stable structure and permeable channel of MOF , which effectively captures the soluble selenium chloroaluminate compound and further restrains the shuttle effect, resulting in improved cycling performance.
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DYES AND PIGMENTS
·
2023
·
IF 4.5
Cai-Yong Zhu,Meng-Ting Shen,Meng-Jie Qi,Ya-Yu Zhao,Zhen Xu,Peng Li,Jie Ru,Wei Gao,Xiu-Mei Zhang
A new 3D Mn-MOF was prepared with the ligand H 2 L (H 2 L = 5-(pyrazin-2-yl) isophthalic acid) by solvothermal method. Then the Mn-MOF was used as a precursor to synthesize CdS/Mn-MOF composites. The degradation efficiency of Rhodamine B (RhB) by CdS/Mn-MOF (theoretical mass ratio of CdS to Mn-MOF is 1:1) is 98.7% in 60 min, which is 19.7 times and 2.3 times that of Mn-MOF and CdS, respectively. The outstanding performance is owed to the loading of CdS, which significantly broadens the photoresponsive range of Mn-MOF and improves the utilization of visible light. Meanwhile, the heterojunction formed between Mn-MOF and CdS can effectively inhibit the recombination of photogenerated electrons and holes. Furthermore, the photocurrent intensity of CdS/Mn-MOF(50) is higher than that of Mn-MOF and CdS. The photocatalytic performance of CdS/Mn-MOF(50) also exhibits excellent stability and reusability . In addition, the enhanced mechanism of photocatalytic activity was investigated systematically.
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Nanomaterials
·
2023
·Vol. 13
·期 16
·2318
·
IF 5.3
Cong Guo,Yunying Huo,Qiao Zhang,Kai Wan,Guangxing Yang,Zhiting Liu,Feng Peng
The electrocatalytic conversion of biomass into high-value-added chemicals is one of the effective methods of green chemistry. Conventional metal catalysts have disadvantages, such as low atomic utilization and small surface areas. Catalyst materials derived from metal–organic frameworks (MOFs) have received much attention due to their unique physicochemical properties. Here, an MOF-derived non-precious metal CoxNiyS electrocatalyst was applied to the oxidation of biomass-derivative 5-hydroxymethylfurfural (HMF). The HMF oxidation reaction activities were modulated by regulating the content of Co and Ni bimetals, showing a volcano curve with an increasing proportion of Co. When the Co:Ni ratio was 2:1, the HMF conversion rate reached 84.5%, and the yield of the main product, 2,5-furandicarboxylic acid (FDCA), was 54%. The XPS results showed that the presence of high-valent nickel species after electrolysis, which further proved the existence and reactivity of NiOOH, as well as the synergistic effect of Co and Ni promoted the conversion of HMF. Increasing the content of Ni could increase the activity of HMF electrochemical oxidation, and increasing the content of Co could reduce the increase in the anodic current. This study has important significance for designing better HMF electrochemical catalysts in the future.Keywords:5-hydroxymethylfurfural oxidation;electrocatalysis;biomass conversion;2,5-furandicarboxylic acid;MOF-derived electrocatalyst
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