MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Chao Chen,Jiayue Ren,Pengcheng Zhao,Jin Zhang,Yongjun Hu,Junjie Fei
Dopamine (DA) is an important neurotransmitter in human’s brain, which has direct connection to diseases like Parkinson’s disease, schizophrenia, etc. Therefore, the sensitive and rapid quantitative detection of DA is essential for medical diagnosis and disease prevention. To construct a novel electrochemical sensor for DA detection, nickel-based metal–organic frameworks (Ni–MOF) were synthesized through a hydrothermal method and combined with β-cyclodextrin. Under optimal experimental conditions, the sensor exhibited a wide linear detection range (0.7–310.2 μM) and a low detection limit (0.227 μM). Furthermore, the sensor exhibited satisfactory stability and accuracy in an electrochemical study involving human serum and dopamine hydrochloride injection samples containing DA, and the redox mechanism of the sensor was elucidated. Overall, this study presents a novel electrochemical sensor based on cyclodextrins and MOFs for DA detection.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Can Fang,Xiangmei Tang,Qingfeng Yi
Exploring efficient non-precious metal oxygen electrocatalysts for oxygen reduction/evolution reactions (ORR/OER) is of great importance in electrochemical energy conversion devices like metal-air battery. Among them, carbon-based composites derived from metal-organic framework (MOF) exhibit excellent catalytic performance in ORR/OER. In this paper, Co-MOF-67 was firstly prepared, and then mixed with FeCl 3 ·6 H 2 O and dicyandiamide, followed by a one-step pyrolysis to obtain bamboo-like nitrogen-doped carbon nanotubes . For the samples, Fe and Co nanoparticles were encapsulated in the front end of the carbon nanotubes and the presence of new (n)-diamond carbon was unexpectedly found. The obtained catalyst (FeCo@CNTs-60) has an onset potential of 1.04 V for ORR in alkaline solution, which is close to the commercial Pt/C (40 wt% Pt) of 1.05 V. The onset potential of 1.02 V in quasi-neutral solution exceeds that of Pt/C of 0.99 V. In addition, FeCo@CNTs-60 exhibited a low potential difference of 0.81 V between OER and ORR potentials. The alkaline zinc-air batteries, fabricated with the sample as the electrocatalyst of air electrode, exhibit higher peak power density and stability than Pt/C, while the rechargeable batteries present superior cycling discharge/charge stability at 5 mA·cm −2 and 10 mA·cm −2 . In particular, the battery with FeCo@CNTs-60 was conducted for continuous over 1300 h of ultra long-term cycle charging / discharging test at a current density of 5 mA·cm −2 , and it reveals excellent stability with high voltage efficiency and also presents superior cycle charging / discharging stability after replacing the Zn plates and electrolyte.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shudi Yu,Dongmei Liu,Cheng Wang,Jie Li,Rui Yu,Yong Wang,Jiongting Yin,Xiaomei Wang,Yukou Du
Oxygen evolution reaction (OER) is a multi-electron transfer process, whose intrinsic sluggish dynamic restricts the whole process of overall water splitting (OWS). To address this issue, a porous transition metal sulfide (TMS) catalyst with rich heterojunctions was prepared by vulcanization and trace Fe doping of CoMo-based metal–organic framework (MOF). In this work, the nanoflower composed of ultrathin 2D nanosheets anchored on a nickel foam presents a layered interface that contributes to the exposure of active regions. The resulting electrode denoted as Fe@CoMo 2 S 4 /Ni 3 S 2 /NF required a low overpotential (η 10 = 167 mV @ 10 mA cm −2 , η 50 = 260 mV @ 50 mA cm −2 ) in 1.0 M KOH for OER and a small cell voltage (E = 1.513 V @ 10 mA cm −2 ) to power OWS when coupled with commercial Pt/C. It also exhibited splendid morphological and chemical stability with virtually invariant polarization curve and flower-like appearance after 1000 CV cycles, as well as long-term durability over 100 h with a constant current density of 10 mA cm −2 . This work revealed the multi-anionic regulation mechanism in the surface reconstruction of sulfide electrocatalysts, and verified that Co/Mo/Ni-based oxysulfide was the true active substance of OER, which inspired the understanding and design of multi-anionic regulated electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Yan-Feng Huang,Xiao-Yi Sun,Shu-Hui Huo,Ying Li,Chongli Zhong
The high performance of catalysts relies largely on the meticulous design of hierarchical hollow micro/nanostructures with more active sites and superb structural tenability. Herein, we developed a simple strategy to design and fabricate CoFe 2 O 4 /CuO (sub)microcages using core-shell dual-MOF heterostructures (Fe II -Co PBAs@HKUST-1) as both the precursor and self-sacrificing template. The derivation of metal oxide composites from dual-MOF heterostructures is challenging, and this method could overcome the difficulty caused by the possible lattice mismatch between the different MOFs . Uniform core-shell dual-MOF structures Fe II -Co PBAs@HKUST-1 were first fabricated and then converted to CoFe 2 O 4 /CuO (sub)microcages by thermal annealing in air. The resulting CoFe 2 O 4 /CuO (sub)microcages were extensively characterized and exhibited remarkable catalytic performance with an excellent stability and magnetic recyclability for the reduction of 4-nitrophenol to 4-aminophenol by NaBH 4 . In addition, CoFe 2 O / CuO (sub)microcages were also found to be highly active for catalytic reduction of methylene blue (MB) by NaBH 4 in an aqueous solution. The results show that CoFe 2 O 4 /CuO (sub)microcages have potential application for organic pollutants degradation and environmental rehabilitation.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Yaru Li,Weihao Liu,Runcheng Liu,Jinjuan Gao,Jingwen Feng,Shicai Xu,Zhen Li,Shouzhen Jiang,Xuejian Du
The development of portable biosensors exhibiting outstanding performance for fast and convenient detection of human glucose levels takes on critical significance to human health testing. A two-dimensional metal-organic framework (Cu-TCPP 2D MOF)-sensitized arrayed resonant cavity silver film (ARC/Ag) optical fiber surface plasmon resonance (SPR) sensor was developed in this study. The ARC/Ag 3D structure overcame weak coupling and non-uniform plasmon resonance, and the resulting strong hotspots effectively extended the sensing region. Moreover, the coated MOF is considered as a prominent SPR sensitized layer for its plasmonic property and highly ordered structure. The results of the simulations confirmed the local electric field enhancement that was attributed to the plasmonic synergistic effect of MOF with ARC/Ag. The normalized transmission spectra were collected in ethanol solutions with the refractive index (RI) of 1.340 to 1.352, and the sensitivity and the figure of merit (FOM) of the sensor were demonstrated to be increased by 73.98% and 68%, respectively. The sensor exhibited a linear response factor of 9.99 nm/(mg/mL) over a glucose concentration range of 0.1–1.2 mg/mL by covalently immobilizing glucose oxidase (GOD) on MOF. Accordingly, the proposed highly integrated and portable biosensor provides a piece of promising evidence for label-free glucose detection at point of care (POC).
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Ning Wang,Jingjing Du,Xue Li,Xunlong Ji,Yulin Wu,Zhenli Sun
With the widespread use of uranium in the nuclear industry, achieving rapid and sensitive detection of uranium contaminants is critical for reducing environmental pollution. Surface-enhanced Raman scattering (SERS), with its high sensitivity and unique fingerprint properties, has been used for the analysis of uranyl. However, the weak affinity of Au for uranyl remains a challenge in the development of spherical Au-based SERS substrates. The metal–organic framework (MOF) material ZIF-8 exhibits excellent adsorption capacity for uranyl and could overcome this limitation. In this study, ZIF-8 porous structures were modified on a magnetic SERS substrate, Fe3O4@SiO2@Au (FA), for the rapid and sensitive detection and analysis of the uranyl species. Uranyl was adsorbed by ZIF-8, allowing ready access to the hot spots in the interstices of Au nanoparticles (AuNPs). Symmetrically stretched vibrating bonds of O═U═O were detected at 829 cm–1 as the characteristic peak of uranyl by surface plasmon resonance between the AuNPs. The ZIF-8 coating had minimal influence on target detection as the detection limit for 4-MPY was only half an order of magnitude lower than before modification. The enhancement factor for uranyl reached 106. The substrate showed excellent sensing performance in a neutral or alkaline environment. It was used to detect uranyl in tap water and river water; rapid separation of the species from the water samples was achieved using an external magnet to extract radioactive waste. The proposed substrate offers a route for monitoring and detecting uranyl contamination and an approach for achieving rapid on-site detection, providing a promising application for environmental contaminant detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lizhu Zeng,Chenjia Lin,Peiqing Liu,Duanping Sun,Jing Lu
Cardiac troponin I (cTnI), a principal biomarker of acute myocardial infarction, possesses superior cardiac specificity and can provide a long detection window for cardiac injury. Although the potential of cTnI as a cardiac biomarker is promising, sensitive and rapid detection of cTnI remains challenging. In this work, a novel colorimetric biosensor was developed for cTnI detection based on multifunctional hybrid nanoprobes coupled with triple-aptamer-modified tetrahedral DNA nanostructures (TAPT-TDNs). First, we evaluated the affinity of four TAPT-TDNs with three vertices modified by two kinds of aptamers in different proportions. The four TAPT-TDNs exhibited much better affinity than the single-stranded aptamer for cTnI, which was attributed to the fact that TAPT-TDNs could improve the capture efficiency of cTnI with excellent interface density and constant support. Second, the selected TAPT-TDNs with highest affinity were immobilized on Fe 3 O 4 -Au magnetic nanoparticles as capture probes (named Fe 3 O 4 -Au-TAPT-TDNs). TAPT-TDNs and HRP were both labeled on NH 2 -MIL-101(Fe) to form signaling probes (named MIL-101(Fe)-HRP-TAPT-TDNs). Then, with the help of capture probes and signaling probes, the target protein was recognized and captured to form capture probe-cTnI-signaling probe sandwich-like structures, causing a decrease in signaling probes in the supernatant with magnetic separation and eventually leading to a visual color change. This colorimetric aptasensor displays excellent analytical performance toward cTnI with a detection limit of 27 pg·mL −1 . The anisotropic aptamer-mediated colorimetric sensor may serve as an alternative to conventional immunoassays for quick and accurate detection of cTnI in clinical samples.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xixi Cen,Yuxiu Sun,Caijiao Yu,Chenxu Geng,Zhenjie Gu,De Ao,Zhengqing Zhang,Zhihua Qiao,Chongli Zhong
Large-area metal–organic framework (MOF) single crystal membrane materials hold great appeal in gas separation field due to their outstanding separation selectivity and permeability. Nevertheless, it is currently difficult to prepare MOF single crystals large enough for gas separation tests owing to the limited manufacturing processes. In this work, we fabricate a self-supporting MOF single crystal (Co-btec SC) membrane with 0.3 × 0.1 cm 2 dimension via a facile supersaturation synthesis strategy. Benefiting from the one-dimensional (1D) transmission pathway and three-dimensional (3D) connection network, the obtained Co-btec SC has ultra-high permeability of 47,647 Barrer. Besides, the H 2 O molecules firmly filled in the pore channels greatly improve the affinity and solubility for CO 2 , and thus Co-btec SC yields CO 2 preferential permeation in CO 2 /H 2 mixture with superior CO 2 /H 2 selectivity of 18.79. In addition, the Co-btec SC shows dramatic high-temperature and high-humidity separation stabilities. To demonstrate the versatility of this strategy, we also successfully fabricated hydrogen-bonded organic framework single crystals (HOF SCs) with the size of about 0.4 cm. This supersaturation strategy opens a new way to fabricate the large-area MOF single crystal membranes.
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 9
·e18181
·
IF 3.7
Yanling Guo,Yan Wei,Miao Chang,Dan Wang,Jie-Xin Wang,Jian-Feng Chen
Zr-based metal-organic framework (Zr-MOF) nanoparticles (NPs) have attracted extensive research thanks to their outstanding thermal and chemical stability, but their efficient synthesis is still challenging. Here, high-quality Zr-MOF NPs with tunable and uniform particle sizes can be successfully fabricated within 30 min by high-gravity technology with high yields. Significantly, the rapidly milder preparation of UiO-66 NPs can also be achieved at 90 or 70°C. This strategy has been extended to the synthesis of other Zr-MOF NPs. Furthermore, the water vapor adsorption properties of obtained UiO-66 NPs display a size-dependent effect. The 70 nm UiO-66 NPs have the highest adsorption capacity of 625 mg g −1 among unmodified UiO-66 reported so far, and manifest 2.0–2.8 times faster water adsorption rate than the micron ones. This study provides a feasible method for the efficient and mild preparation of MOFs nanoparticles, which may promote the synthesis and applications of nano-sized MOFs.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 41
·期 12
·1889-1901
·
IF 4.3
Ma Jin-Liang,Liu Long-Long,Zhao Ren-Hai,Yuan Ding,Ning Xin
Reasonable construction of high activity and low cost non-noble metal oxygen reduction reaction (ORR) catalyst is of great importance for the wide application of zinc-air batteries (ZABs). Using bimetallic MOF as a precursor combined with electrospinning, high-temperature carbonization and electrodeposition, we successfully developed a porous carbon nanofiber (Co@Fe-CNFs-1000) with bimetallic active center as an efficient catalyst for ORR. The successful construction of this special core-shell structure directly explores the synergy between different active centers. The results showed that the synthesized Co@Fe-CNFs-1000 catalyst exhibited ORR performance comparable to that of Pt/C in 0.1 mol/L KOH electrolyte, high half-wave potential ( E 1/2 =0.81 V) and limiting current density ( J L =5.4 mA-cm −2 ). In addition, homemade liquid ZABs with Co@Fe-CNFs-1000 as the air cathode showed excellent power density (155.8 mW·cm −2 ), specific capacity (780.6 mAh·g Zn −1 ) and long-term stability (over 100 h at 2 mA·cm −2 ), surpassing even Pt/C-based batteries. In addition, the flexible solid-state ZABs assembled based on Co@Fe-CNFs-1000 demonstrates excellent flexibility and durability. This work provides a new idea for constructing ORR catalysts with high activity centers.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 31
·2304149
·
IF 15.1
Qiuyu Ye,Enxian Yuan,Jin Shen,Mingli Ye,Qin Xu,Xiaoya Hu,Yun Shu,Huan Pang
CsPbX 3 perovskite nanocrystal (NC) is considered as an excellent optical material and is widely applied in optoelectronics. However, its poor water stability impedes its study in enzyme-like activity, and further inhibits its application in biomimetic cascade catalysis. Herein, for the first time, the oxidase-like and ascorbate oxidase-like activities of an amphiphilic polymer capped CsPbX 3 are demonstrated, and its catalytic mechanism is further explored. Furthermore, an all-nanozyme cascade system (multifunctional CsPbBr 3 @Zr-metal organic framework (Zr-MOF) and Prussian blue as oxidase-like and peroxidase-like nanozyme) is constructed with a portable paper-based device for realizing the dual-mode (ratiometric fluorescence and colorimetric) detection of ascorbic acid in a point-of-care (POC) fashion. This is the first report on the utilization of all-inorganic CsPbX 3 perovskite NC in biomimetic cascade catalysis, which opens a new avenue for POC clinical disease diagnosis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jingwen Feng,Jinjuan Gao,Wen Yang,Yaru Li,Jian Shi,Cong Liu,Mingshun Jiang,Shouzhen Jiang
Two-dimensional (2D) metal–organic frameworks (MOFs) have promising applications in surface plasmon resonance (SPR) sensing for their intriguing exciton migration and visible light-near infrared absorption properties. In this study, an effective biosensing structure comprising 2D Cu-TCPP MOF nanosheet-capsulated Au film was developed, such that lower molecular-weight dopamine with small changes of refractive index can be identified on the fiber-optic platform. The large areas of ultrathin 2D Cu-TCPP MOF nanosheets were well prepared, the experimental results indicated that the sensitivity (48%) and figure of merit (18%) were increased notably compared with the bare Au film. Moreover, the finite element method was adopted to numerically analyze and verify the excellent charge-transfer ability of MOF nanosheets and the bidirectional gain properties between MOF nanosheets and Au films. Furthermore, the sensitivity [1.24 nm/log(M)] and selectivity of the dopamine were significantly enhanced with a low limit of detection of 1.50 × 10–13 M and linear response with a wide range of concentrations from 5 × 10–12 M to 5 × 10–7 M through ssDNA surface modification and conformation amplification. As revealed by the above-mentioned results, the Cu-TCPP/Au/SMF biosensor can serve as a promising nanoplatform for clinical diagnosis and medical assessment.
✓ 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）