ENERGY
·
2024
·
IF 9
Tao Tan,Yushu Chen,Yongyue Wang,Zuhao Li,Zhige Zhang,Jun Xie,Yong Chen
The use of green biogas as a raw material for producing methanol-friendly syngas (H 2 /CO ≈ 2) for one-step methanol synthesis has gained significant attention. However, developing efficient catalysts with high activity and stability remains challenging, as they often face issues with stability and carbon deposition. This study presents a Ni/CeO 2 /HT catalyst designed for high activity and long-term stability by leveraging the Ce redox cycle and strong interactions between Ni-CeO 2 and hydrotalcite (HT). The catalyst benefits from abundant oxygen vacancies generated by the Ce 3+ - Ce 4+ pathway, enhancing its ability to activate CO 2 and H 2 O and providing excellent coke resistance. Comprehensive analyses of CO 2 /H 2 O adsorption and carbon elimination mechanisms were conducted using techniques such as in situ H 2 -TPR, CO 2 /H 2 O-TPSR, in situ CH 4 -TPSR, CO 2 /H 2 O-TPO, and FTIR. The Ni/CeO 2 /HT catalyst outperformed others in CO 2 /H 2 O adsorption and CH 4 activation capacity, promoting the generation of active oxygen species and effectively removing coke precursors, thereby improving resistance to Ni sintering and carbon deposition. At 750 °C and a weight hourly space velocity (WHSV) of 32,400 mLg Cat −1 h −1 , it achieved CH 4 and CO 2 conversions of 93 % and 66 %, respectively, with long-term stability exceeding 200 h.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jianing Zhang,Junjun Zhang,Lei Zhou,Nurmymeti Yasen,Abudulekemu Abudinaibi,Xiaowei Huang,Xiaodong Zhai,Zhihua Li,Jiyong Shi,Remah Sobhy,Ibrahim Khalifa,Xiaobo Zou
Intelligent films are essential for real-time monitoring of food spoilage. However, the application is often limited by challenges such as hydrophilicity and color instability. In this study, two high hydrophobic bilayer indicators based on sodium alginate-polyvinyl alcohol/chitosan-zein with alizarin grafted onto ZIF-8 carrier (AL@ZIF-8) were fabricated using the casting method and electrospinning, respectively. Molecular docking simulations confirmed the successful grafting of AL@ZIF-8 onto the film substrates. The performance of films was compared and the effectiveness in monitoring freshness indicators was evaluated. The cast film had a precisely controlled thickness due to self-assembly performance, resulting in superior mechanical properties (TS = 10.64 MPa, EB = 43.764 %). In comparison, the nanofiber films demonstrated higher UV-blocking ability (ΔE < 4), faster spoilage response, and greater safety (Cell viability >80 %). Importantly, the nanofiber films exhibited higher sensitivity in monitoring beef freshness, with a color change pattern strongly correlating with spoilage (R 2 = 0.8976).
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PubMed
高影响因子
SYNTHESIS-STUTTGART
·
2019
·Vol. 51
·期 17
·3221-3230
·
IF 2.867
Wei Sun,Mingjuan Zhang,Peilang Li,Yiqun Li
A novel and highly efficient one-pot synthesis of polysubstituted imidazoles from α-hydroxyphenylacetic acids, diphenylacetylene, and amines has been achieved by Pd(OAc)2/Ce(SO4)2/Bi(NO3)3 trimetallic catalytic system. A series of control experiments showed that this overall reaction occurs through a one-pot cascade process combining the steps of decarboxylation of α-hydroxyphenylacetic acids, Wacker-type oxidation of diphenylacetylene, and Debus–Radziszewski annulation of aryl aldehydes and benzil generated in situ, as well as amines. This reaction represents a novel multicomponent reaction using α-hydroxyphenylacetic acids and diphenylacetylene as sources of aryl aldehydes and a β-diketone. This process exhibits a broad substrate scope and a good functional group tolerance to assemble the corresponding polysubstituted imidazoles in excellent yields (72–88%) under mild conditions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiaoshi Lang,Fang Ge,Kedi Cai,Lan Li,Qiushi Wang,Qingguo Zhang
In this paper, a novel Mn 3 O 4 /MnO nano spherical transition metal compound as bi-functional catalyst for air electrode of lithium-oxygen battery is prepared by vacuum direct current arc method. Through physical property characterization , it shows that the Mn 3 O 4 /MnO particle size can be controlled between 40 and 60 nm and evenly distributed inside the carbon material. In addition, photoluminescence test result indicates that this material has better electronic conductivity and catalytic activity than traditional MnO 2 catalyst owing to some defects in the crystal structure. The cyclic voltammetry results display that the oxidation and reduction reactions are both very obvious even at high scanning rate, although only one kind of catalyst is employed in the air electrode. This proves that the Mn 3 O 4 /MnO nano spherical transition metal compound can be as a bi-functional catalytic material. Electrochemical impedance spectroscopy also displays that the charge transfer resistance of Mn 3 O 4 /MnO catalyst is smaller and the ion diffusion speed is faster. Through charge and discharge test, it can be concluded that the voltage platform of the lithium-oxygen battery with Mn 3 O 4 /MnO as bi-functional catalyst is flat and the discharge voltage can reach 2.7 V. The specific energy can reach 7102 Wh·kg −1 at 0.025 mA cm −2 current density and a capacity limit of 1000 mAh·g −1 , it can carry out the 31 non capacity decay charge and discharge cycles.
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高影响因子
JOM
·
2022
·Vol. 75
·期 5
·1515-1529
·
IF 2.597
Ge Yang,Liu Zhihong,Yu Zhiqian,Wang Huanwen,Lu Xingwu,Zhang Leru,Xia Longgong
The present study focused on the Cu-Pb system and investigating the distribution behaviors of various minor elements through the equilibration-quenching-EPMA analysis experimental technique. Obtained results showed that: (1) An intermetallic compound consisting mainly of Cu-Pb-Se-Te formed below 956°C. (2) As, Sb and Sn had similar distribution behaviors, which mainly entered the solid Cu phase at the temperature range of 500–900°C, but became concentrated in the liquid alloy phase at temperature range of 900–1060°C, and their distribution ratios increased along with increasing temperature. (3) Bi was mainly found in the liquid alloy phase, and its distribution ratio ranged from 6.8 to 836.5 at the experimental conditions. (4) Se and Te formed an intermetallic alloy phase under 900°C, and they enriched in the liquid alloy phase between 960°C and 1060°C. (5) Au was mainly found in the solid Cu phase at the temperature range of 500–900°C, and its distribution ratio was about 1.5 at 900–1060°C. The distribution ratio of Ag decreased from 8.7 to 2.3 when increasing the temperature from 500°C to 1060°C. Distribution behavior of As, Sb, Bi and Sn is consistent with their interfacial enthalpies with Cu and Pb.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Chao Chen,Xiaohua Deng,Yingjie Deng,Lu An,Yijie Deng,Yuying Zheng,Dai Dang,Xu Yang
Developing high-efficiency bifunctional materials for electro-catalysis and supercapacitors are urgently needed but challenging. Herein, we develop a self-supporting Co–Ni LDH electrode prepared by in-situ growing ZIF-L(Co)@ZIF-L(Co, Ni) on carbon paper followed by a pseudomorphic transformation. The optimized Co–Ni LDH/carbon paper electrodes (CN-2/CP) exhibit excellent electrochemical activity and stability in oxygen evolution reactions (OER) and supercapacitors. The CN-2/CP electrode displays a low overpotential of 230 mV at 10 mA cm −2 and superior stability at 40-h chronopotentiometry for OER. For supercapacitor, the CN-2/CP electrode delivers a high specific capacitance of 1346 F g −1 at 1 A g −1 and maintains a capacitance of 88.5% after 7000 charge/discharge cycles at 20 A g −1 . Based on the physical and chemical characterization results, the high performance originates from the in-situ electrochemical conversion of metal hydroxide , improved conductivity, fast charge transfer at the interface and unique layered cross morphology providing more active sites.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Tian-Tian Wang,Jing-Yi Liu,Jun-Dan An,Yang-Fan Shi,Yi-Yun Zhang,Jian-Zhong Huo,Zheng-Guo Huang,Yuan-Yuan Liu,Bin Ding
Metal-organic framework (MOFs), also known as porous coordination polymers (PCPs), is a new kind of crystalline porous materials, which has received extensive attention in the past few decades. As a new type of sensing material, MOFs stand out from many other traditional fluorescence sensors because of its crystal characteristics, structural diversity, stable porosity and adjustable functional characteristics. In this work, the bi-functional building block containing aromatic carboxylic acid and triazole moieties, namely 3-(1H-1,3,4-triazol-1-yl) benzoic acid, was selected as the linker to synthesize {[Cd(µ 5 -L)⋅I} n ( 1 , HL = 3-(1H-1,3,4-triazol-1-yl)benzoic acid) by hydrothermal method with transition Cd II metal centers. Firstly, the preliminary characterization of 1 was carried out by means of PXRD, FT-IR, and then the UV and fluorescence tests were conducted to study the fluorescence properties of 1 . The crystal structure analysis indicates that Cd II is the center and the ligand is bridged to form a two-dimensional porous structure. In addition, 1 has good selectivity for Fe 3+ and Cr 2 O 7 2− , meanwhile, it has high detection sensitivity (K sv quenching efficiency for Fe 3+ : 1.2 × 10 4 M −1 and Cr 2 O 7 2− 1.85 × 10 4 M −1 ) and low detection limit (Fe 3+ : 19.21 μM and Cr 2 O 7 2− : 12.46 μM). The results of photoluminescence test show that 1 can detect cations and anions with high sensitivity, resist the interference of other ions, and have good reusability. As far as we know, 1 is the first example of ultra-stable two-dimensional (2D) Cadmium (II) microporous coordination material as a fluorescence sensor for Fe 3+ and Cr 2 O 7 2− .
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PubMed
高影响因子
Polymer Chemistry
·
2024
·
IF 4.1
Hong-Hui Shu,Yun Liu,Sheng-Li Han,Xiuqin Fang,Chang Wang,Cheng-Mei Liu
Biomass-based polyamides (bioPAs) are renewable materials that are viable alternatives to petroleum-based polyamides in the engineering field. However, the attention to designing functional bioPAs with tunable properties has been limited. Herein, by taking furfurylamine as the sole furan source, we first utilized amine-acid oxidative coversion to prepare bisfuranic diacid monomer directly from bisfuranic diamine monomer(amine-first strtegy), it was totally different to castor oil-based acid-first strategy of preparing PA1010. Then the as-prepared multifunctional diamine/diacid monomers underwent polycondensation to obtain all-furan based bioPAs with or without functinal pendant groups. The properties of bioPAs, incuding glass transition temperatue, degradation character, solubility, etc, can be regulated over a larger range through the design of the spacer structure between two furan rings on diamine monomers. Charged bioPAs with cationic or anionic groups were further developed by postpolymerization modification. The oppositely charged bioPAs, sharing an identical main chain structure but different pendent groups, formed porous polyelectrolyte complexes owing to their rigid main chain. Therefore, this research provides a novel strategy for preparing both functional and engineering furan-based bioPAs.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Jintao Cai,Tao Chen,Liang Cui,Qiang Jia,Maosheng Liu,Rongkun Zheng,Guowen Yan,Di Wei,Jingquan Liu
Catalytic systems based on nanospheres usually show satisfied catalytic activities due to their huge specific surface areas for active sites immobilization. However, their catalytic activities are usually restricted by the absence of active sites inside the nanospheres and the inadequate communications between the interior and exterior of the nanospheres . Therefore, it can be anticipated that great improvement will be achieved if a porous three-dimensional catalytic system can be designed, through which the activity sites can be distribute interior and exterior. Herein, polydopamine (PDA) NPs with uniform sizes of 300 nm are prepared. Then, the Ru nanoclusters (Ru NCs) are uniformly generated inside and on the surface of the PDA NPs to afford the bi-nanospheres (Ru-PDA NPs). After annealing, the porous carbonized Ru-PDA NPs (Ru-cPDA-750 NPs) with electroactive nitrogen atoms are finally obtained, exhibiting small overpotential (42 mV at the current density of 10 mA cm −2 ), low value of Tafel slope (35 mV decade −1 ) and robust stability for hydrogen evolution reaction (HER), which are comparable to that of Pt/C catalyst. Moreover, the study on the effect of Ru NCs amount on electrocatalytic ability reveals that Ru-cPDA NPs loaded with 0.08 wt% of Ru NCs exhibit the best HER catalytic performance compared with the Ru-cPDA NPs loaded with other amount of Ru NCs (0.04–0.16 wt%).
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Teng Huang,Fan Tian,Zhipan Wen,Guangfang Li,Ying Liang,Rong Chen
Bi/Bi 2 WO 6-x heterostructures has been successfully prepared by a facile one-step hydrothermal method. By maneuvering reaction time and Bi/W molar ratio of the precursors, we have been able to selectively introduce oxygen vacancy and metallic Bi into Bi 2 WO 6 nanostructures. The obtained Bi/Bi 2 WO 6-x heterostructures with more oxygen vacancy and moderate metallic Bi exhibit significantly improved photocatalytic activity for the photodegradation of bisphenol A (BPA) and its analogues due to its great ability for the generation of singlet oxygen ( 1 O 2 ), which has proven to work as the main reactive oxygen species during photocatalysis. It is also found the 1 O 2 concentration is highly depended on and modulated by the content of oxygen vacancy and metallic bismuth. Besides, we also demonstrate that the obtained Bi/Bi 2 WO 6-x products display efficient photocatalytic performance toward BPA derivatives degradation and enhanced stability to resist the interferences in the water matrix.
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Mengdie Lei,Xilin Ding,Jin Liu,Yinjun Tang,Hongxiang Chen,Yu Zhou,Chengzhou Zhu,Hongye Yan
The urgent need for sensitive and accurate assays to monitor acetylcholinesterase (AChE) activity and organophosphorus pesticides (OPs) arises from the imperative to safeguard human health and protect the ecosystem. Due to its cost-effectiveness, ease of operation, and rapid response, nanozyme-based colorimetry has been widely utilized in the determination of AChE activity and OPs. However, the rational design of nanozymes with high activity and specificity remains a great challenge. Herein, trace amount of Bi-doped core–shell Pd@Pt mesoporous nanospheres (Pd@PtBi2) have been successfully synthesized, exhibiting good peroxidase-like activity and specificity. With the incorporation of trace bismuth, there is a more than 4-fold enhancement in the peroxidase-like performance of Pd@PtBi2 compared to that of Pd@Pt. Besides, no significant improvement of oxidase-like and catalase-like activities of Pd@PtBi2 was found, which prevents interference from O2 and undesirable consumption of substrate H2O2. Based on the blocking impact of thiocholine, a colorimetric detection platform utilizing Pd@PtBi2 was constructed to monitor AChE activity with sensitivity and selectivity. Given the inhibition of OPs on AChE activity, a biosensor was further developed by integrating Pd@PtBi2 with AChE to detect OPs, capitalizing on the cascade amplification strategy. The OP biosensor achieved a detection limit as low as 0.06 ng mL–1, exhibiting high sensitivity and anti-interference ability. This work is promising for the construction of nanozymes with high activity and specificity, as well as the development of nanozyme-based colorimetric biosensors.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jingjing Wang,Zhiwei Liu,Liying Wang,Lu Li,Qian Liu,Zhiwei Liu,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
A novel photocatalyst WO 3 /BiMOF/Bi 2 WO 6 was prepared by self-assembly of benzene dicarboxylic acid ligand (H 2 BDC) anchoring Bi source on the surface of Bi 2 WO 6 to form BiMOF, in which WO 3 spherical particles were scattered uniformly. Thereby, an amount of metal and oxygen vacancies (V M + O ) are generated. The 3D flower-like spherical photocatalyst has a large specific surface area and close interfacial contacts, which can provide sufficient channels for carrier migration. The introduction of BiMOF enhanced the light absorption capability of photocatalyst. As a result, the flower-like WO 3 /BiMOF/Bi 2 WO 6 structure exhibits excellent nitrogen fixation as well as high-level photocatalytic activity in degrading Rhodamine B (RhB) and tetracycline (TC) under visible light. For one thing, WO 3 /BiMOF/Bi 2 WO 6 produce ammonia up to 227 μmol L −1 h −1 . For another, the degradation efficacy displayed by RhB 99.3% in 15 min and TC 93.6% degradation in 50 min, respectively. In addition, the catalysts showed excellent cyclic stability, with constant degradation efficiencies for at least 4 cycles. The experimental results of free radical scavenging showed that holes (h + ) and superoxide radical (·O 2− ) were the main active substances in the photodegradation process. Therefore, the photocatalytic mechanism of 3D flower-like WO 3 /BiMOF/Bi 2 WO 6 was also proposed.
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