ACS Applied Nano Materials
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2024
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IF 5.3
Congyue Sun,Zhongcheng Zhao,Dongyan Xu,Xiaojin Li,Ke Ye
The rapid development of proton-exchange membrane fuel cells needs to develop Pt-based oxygen reduction reaction (ORR) catalysts with activity and stability. In this study, PtCu alloy nanoparticles were in situ anchored on an N-doped porous carbon (NC) derived from ZIF-8 with a chemical reduction method to produce a PtCu/NC catalyst with a Pt loading of 7.96 wt %. The PtCu alloy nanoparticles are uniformly immobilized on the NC with a high surface area via a metal–support interaction. The electrochemical test results demonstrated that the PtCu/NC catalyst displays remarkable activity with an E1/2 value of 0.913 V vs RHE, higher than 0.878 V vs RHE for the commercial Pt/C. The ORR mass activity of the PtCu/NC catalyst is 1.49 and 6.54 times that of PtCu/XC-72 and commercial Pt/C, respectively. The eminent ORR performance of PtCu/NC is attributed to the high specific area of NC and electron-rich Pt sites enhanced by electron transfer from the N and Cu atoms. Moreover, PtCu/NC exhibited better catalytic stability than PtCu/XC-72 and Pt/C after 3000 potential cycles, attributed to the interaction between the N atom and PtCu alloy.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yongwei Cai,Yao Chen,Ruru Wang,Jianxiang Li,Hong Yang,Yuanju Li,Danni Qu
Developing a superhydrophilic/underwater oleophobic mesh membrane using an economical and eco-friendly method is still challenging to achieve high efficiency for oily wastewater separation. In this study, we proposed a novel approach to fabricate superhydrophilic/underwater oleophobic PVP/ZIF-8 coatings on stainless steel (SS) mesh using a low-cost and environmentally friendly electrodeposition method. The prepared PVP/ZIF-8@SS mesh membrane exhibited remarkable self-cleaning and anti-oil-fouling properties, along with a strong chemical robustness in extreme environments. Additionally, the mesh membrane demonstrated strong antimicrobial ability and excellent corrosion resistance property. The mesh membrane also showed promising potential in gravitational oil-water separation and oil recovery, achieving a separation efficiency of 99.0% and a water flux of 3.8 × 10 3 L·m −2 ·h −1 for rapeseed oil-water mixtures. Importantly, the PVP/ZIF-8@SS mesh membrane maintained exceptional separation efficiency, high water flux, and underwater oleophobicity properties even after undergoing 35 cycles of oil-water separations. The oil-water separation mechanism of the PVP/ZIF-8@SS mesh membrane suggested that the surface of the mesh membrane contained PVP/ZIF-8 particles with a significant negative charge. These particles preferentially interacted with positively charged water, facilitating the rapid passage of water phase through the pores, while impeding the permeation of negatively charged oil phase. This research provides an effective strategy for practical applications, including marine oil spill cleanup, oily wastewater treatment, and recycling of residual cooking oil in the restaurant industry.
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JOURNAL OF ORGANOMETALLIC CHEMISTRY
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2025
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IF 2.4
Ke Yang,Sisi Cheng,Shijia Li,Kun Zhu,Ziqin Yao
The influencing factors of ZIF-8 synthesis were systematically investigated by the green synthesis method and the samples were also compared with ZIF-8 synthesized in other ways, and an optimal synthesis route was found by exploring the synthesis conditions. On this basis, the synthesis mechanism of ZIF-8 was analyzed. The research results show that the key influencing factors in the reaction process are the amount of NaOH and the pH value of the system. Different amounts of NaOH will produce different intermediates, and these intermediates further affect the pH value of the entire reaction system. The pH value of the system plays a decisive role in the deprotonation process of the ligand in the reaction, and this process is the key to whether the ZIF-8 structure can be formed. It is worth mentioning that the ZIF - 8 synthesized in this study demonstrates varying removal performances for different dyes under different conditions. Under specific conditions, it exhibits the maximum removal rate for Rhodamine B (RhB), reaching 99.97 %. This excellent removal performance is closely associated with the pore - structure characteristics of the synthesized material, which fully indicates that the ZIF - 8 synthesized through the green route has certain application potential and promising application prospects in related fields.
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CARBOHYDRATE POLYMERS
·
2024
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IF 10.7
Ting Su,Hongxia Shang,Xinru Su,Zhixian Sun,Yuehan Li,Linwen Li,Zhen Zhang,Renyong Geng,Shuisheng Chen
In this investigation, a hydrogel adsorbent featuring remarkable efficiency in dye adsorption was successfully synthesized by the integration of natural polysaccharide (pullulan) and nanoparticles (ZIF-8@PDA). The prepared natural polysaccharide nanocomposite hydrogels not only exhibit superior mechanical strength and biocompatibility, but also demonstrate adeptness in the removal of dye pollutants. The dye removal capacities were 615.4 mg/g for malachite green (MG) and 525.8 mg/g for Congo red (CR), respectively. Notably, the adsorption process exhibits minimal susceptibility to variations in water quality and the presence of co-existing ions. The pH-responsive surface charge conversion capability of the adsorbent renders it recyclable, maintaining a dye adsorption performance exceeding 88 % even after 5 cycles of repeated usage. Overall, these environmentally friendly natural polysaccharide nanocomposite hydrogels hold potential for addressing complex wastewater treatment challenges and long-term use.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shang Gao,Xinmeng Li,Chenyu Wang,Ruihua Yuan,Qin Zhang
Although metal-organic framework (MOF) derivatives are expected to exhibit advanced gas sensing properties, few amorphous MOF derivatives have been synthesized and used as gas sensors because common synthetic methods usually yield crystalline derivatives. In this work, an amorphous derivative of ZIF-67 consisting of nanocubes with an average size of about 200 nm was synthesized by calcining ZIF-67 at 260 ℃. The amorphous derivative started to transform into crystalline Co 3 O 4 at a calcination temperature of 270 ℃, during which the nanocubes collapse into nanoparticles . The amorphous derivative has a high specific surface area of 350.2 m 2 /g and a high mesopore ratio of 77.3 %. Remarkably, the amorphous derivative of ZIF-67 delivers a significantly enhanced response of 74.8–100 ppm triethylamine (TEA) gas at a low working temperature of 100℃ (30 % relative humidity), which is superior to that of ZIF-67 and its crystalline derivative. In addition, the amorphous derivative offers higher selectivity, greater long-term stability and good response under high relative humidity conditions. The response and recovery times are 125 s and 88 s. The improved gas sensing performance is mainly attributed to the high adsorbed oxygen content, large specific surface area and higher porosity of the material. The synthetic method detailed here could facilitate the development of gas sensors based on amorphous materials.
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OPTICAL FIBER TECHNOLOGY
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2024
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IF 2.6
Yuhao Chen,Xiaozhan Yang
A Michelson interference dimethyl methyl phosphate (DMMP) fiber sensor with a single-mode (SMF)-dislocated single-mode (DSMF)-hollow-core fiber (HCF) structure is proposed. To fabricate the Michelson interference structure of SMF-DSMF-HCF, one end of the DSMF was misaligned and fused to the SMF, the other end was fused to the HCF to generate a reflective surface. The structure, elemental composition, and surface morphology of ZIF-8@Ag were analyzed using X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy after the ZIF-8@Ag/PDDA composite was coated on the surface of DSMF. The result shows that the sensitivity and the detection limit of the sensor are 45.71 dB/ppm and 0.1431 ppb, respectively, and the response/recovery time is around 14/12 s. The sensor also has excellent selectivity and stability.
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RARE METALS
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2025
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IF 11
Zhao Zhi-Hua,Ma Shi-Xin,Pan Ya-Fang,Rahmatullah Abu-Bakker-Md,Shen Xiao-Qing,Shao Zhi-Gang,Wu Lan
To facilitate real-time monitoring and recording of humidity in the environment and to satisfy the requirement for strain performance in certain applications (such as wearable devices), this paper proposes an in-situ method for synthesising Au nanoparticles on ZIF-67. In this study, an Au@ZIF-67 composite humidity-sensitive material was combined with flexible polyethylene terephthalate interdigitated electrodes to create an Au@ZIF-67 flexible humidity sensor. The prepared samples were characterised using X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The humidity-sensitive properties of the sensor were investigated, and its monitoring capabilities in applications involving respiration, gestures, skin, and baby diapers were tested. The experimental results indicate that compared with a pure ZIF-67 humidity sensor, the Au@ZIF-67 (0.1Au@Z) flexible humidity sensor exhibits a 158.07% decrease in baseline resistance and a 51.66% increase in sensitivity to 95% relative humidity, and the hysteresis, response time, and recovery time are significantly reduced. Furthermore, the sensor exhibits excellent characteristics such as high resolution, repeatability, and stability. The obtained results regarding the material properties, humidity sensitivity, and practical application of non-contact humidity monitoring demonstrate that the prepared sensors exhibit excellent and comprehensive performance, indicating their broad prospects in wearable medical devices, wireless Internet of Things, humidity detection in complex environments, and intelligent integrated systems. Graphical abstract
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OPTICAL MATERIALS
·
2024
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IF 3.8
Shuoqi Zhang,Mingxing Zhao,Lei Shi,Chunsheng Lei
In this paper, a novel Z-scheme BiOI/ZIF-67 photocatalyst (BOI/ZIF) was successfully prepared using an in-situ growth method, and its effectiveness in degrading tetracycline (TC) under visible light was assessed. Using a range of characterization techniques, the crystal structure, elemental composition, microstructure and optical characteristics of the composite catalyst were examined. Simultaneously, a 30 % mass ratio catalyst (BOI/ZIF-30) could remove 91 % of TC under visible light, which was 41 % and 28 % greater than the degradation rates of BiOI and ZIF-67, respectively. These results demonstrated that BOI/ZIF exhibited strong photocatalytic activity and excellent stability. The results of the radical quenching experiment and electron spin resonance revealed that h + and •O 2 − were the principal chemical substances responsible for TC degradation, corresponding with the suggested charge transfer mechanism of Z-scheme heterojunction. The Z-scheme heterojunction created between BiOI and ZIF-67 improved the effective separation of photogenerated carriers and boosted the efficiency of TC degradation. This study offers a promising method for designing photocatalytic systems to break down antimicrobial contaminants.
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ENVIRONMENTAL RESEARCH
·
2025
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IF 7.7
Xin Ding,Kexin Yang,Xin Yang,Jie Zhou,Miao Wang,Zhihao Lin,Yaowei Zhang,Donghui Xu,Bining Jiao,Ge Chen,Xiaomin Xu,Lin Qin,Guangyang Liu
At present, it is highly important to develop nanopesticide, which can improve the effect of pesticides and reduce the risks of environmental. Zeolitic imidazolate framework (ZIF) is usually used as a nanocarrier of nanopesticide, which has a porous structure and stimuli-responsive properties. However, the drug loading performance and stability of ZIF are poor. To solve these disadvantages, we successfully prepared bimetallic ZIF nanocarriers by hybridizing and structurally regulating ZIF-L with Co. Here, we propose that Zn and Co bimetallic ZIF (ZnCo-ZIF) was used for efficient loading and controlled release of thiamethoxam (THX). Notably, the specific surface area of ZnCo-ZIF with flower-cluster structure was 8.7338 m 2 /g, which could provide a large number of active sites for THX loading. Besides, it was found that the maximum THX loading rate of ZnCo-ZIF was 12.7% by optimizing the load experimental conditions, which was 1.4 times higher than that initial. After that, ZnCo-ZIF@THX was modified by the metal-phenol network (MPN), which formed through the chelation of tannic acid (TA) and iron ions. In the PBS release medium, the cumulative release rate of the ZnCo-ZIF@THX@MPN reaches 100% for 24h. In addition, the photostability of ZnCo-ZIF@THX@MPN had been greatly improved, which the photodegradation half-life of it was 4.17 times that of THX technical drug. After MPN encapsulation, the maximum retention and rainwater resistance of the nanopesticide on vegetable leaves were also improved. The bemisia tabaci was used as the model insect, and the mortality of ZnCo-ZIF@THX@MPN against was increased to 88.15%. Finally, the safety experiment shows ZnCo-ZIF@THX@MPN had no inhibitory effect on pakchoi seed germination and had good biosafety. This work provides a new idea for the development that the facile synthesis of bimetallic flower-cluster nanocarriers and load of thiamethoxam.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Ning Li,Chao Ma,Dudu Li,Peng Li,Mao Ye,Ziyue Wang,Zhihua Qiao,Chongli Zhong
Mixed matrix membranes (MMMs), combining the advantages of polymer membranes and porous materials, processing the potential to realize large-scale gas separation applications. However, the interfacial defects in MMMs greatly hindered gas separation performance improvement. Therefore, designing an MMM with high loading and good interfacial compatibility remains a critical issue in promoting the application of MMMs. Herein, during in - situ heating process, the melting of liquid ZIF-62 in PBI polymer can largely fill the interfacial defects in MMMs. The microporous transport channels of ZIF-62 glass in MMMs promoted the H 2 diffusion and inhibited the CO 2 and CH 4 diffusion, thus enhancing the H 2 /CO 2 and H 2 /CH 4 separation of MMMs. For mixed gas testing, the 45 wt% ZIF-62 glass/PBI membrane had the maximum H 2 permeability of 459 barrer, and its H 2 /CO 2 and H 2 /CH 4 selectivities were 23 and 57, higher than the gas separation upper bonds. In addition, ZIF-62 glass/PBI membrane exhibited stable separation performance under 1–5 bar pressure. Therefore, the rational combination of MOF glass and polymer matrix could provide promising potential for reducing the interfacial defects of high-loading MMMs, thus enhancing the gas separation performance.
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Journal of Energy Storage
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2024
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IF 8.9
Kanjun Sun,Xiaofei Lei,Xuan Xie,Wenjuan Li,Wenbo Hou,Hui Peng,Guofu Ma
Rational design of inexpensive and durable bifunctional oxygen catalysts is essential to facilitate the commercialization of Zn-air batteries. Hence, we report an electrocatalyst with bifunctional catalytic activity, namely Fe species doped into N, S co-doped carbon encapsulated Co catalysts (e-Fe/Co@NSC). Benefiting from the hierarchical porous structure and multiple adsorption sites, the optimized e-Fe/Co@NSC-20 exhibits excellent oxygen evolution reaction (OER) performance, requiring only overpotential of 282 mV to drive a current density of 10 mA cm −2 . More importantly, the e-Fe/Co@NSC-20 also exhibited excellent oxygen reduction reaction (ORR) performance with a half-wave potential of 0.816 V, successfully revealing that it has excellent bifunctional properties. Moreover, Zn-air battery assembled with e-Fe/Co@NSC-20 catalyst as air electrodes have high open-circuit voltage (1.472 V), power density (136 mW cm −2 ) and specific capacity (639 mAh g −1 Zn ), outperforming Pt/C + RuO 2 -based Zn-air battery. This study provides constructive assistance in the design of electrocatalysts with bifunctional properties for Zn-air battery.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Yipeng Zhang,Zhangze Yang,Yucheng Zou,Shahzad Farooq,Zeyu Qin,Hui Zhang
Aiming to meet the demand for rapid detection of chlorpyrifos (CPS), a surface-enhanced Raman scattering (SERS) sensor based on a gluten/zein electrospun film (GZEF) was fabricated via electrospraying. The SERS performance was namely improved through metal nanoparticles selection and optimization of loading amounts. Further construction of the AANS@ZIF-8@GZEF sensor was achieved through in-situ growth. Owning to the porous structure of ZIF-8, the trapping ability and enrichment effect of the SERS sensor were enhanced, resulting in a superior SERS enhancement effect of 1.58 times. Moreover, the CPS detection under various concentrations was carried out using the AANS@ZIF-8@GZEF sensor. The concentration-logarithm peak intensity equations were fitted, and the limit of detection (LOD) of CPS was calculated to be 0.981 μg/L. Finally, the detection of CPS residues on the peel of apples was performed using the AANS@ZIF-8@GZEF sensor, and the results showed that the overall recovery rate ranged between 91.18% and 96.83%, with all relative standard deviations being less than 5%. Great potential applications in the rapid and sensitive detection of chlorpyrifos in food are expected for the AANS@ZIF-8@GZEF sensor constructed in this study.
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