CATALYSIS LETTERS
·
2021
·Vol. 152
·期 5
·1372-1385
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IF 3.186
Qiu Baocheng,Zhang Yakun,Zhang Yi
The rapid deactivation caused by coke deposits is the major obstacle to the ethane aromatization of Zn-based catalysts. We have successfully synthesized a Zn-embedded inside HZSM-5 crystal catalyst (Zn@HZSM-5) by hydrothermal synthesis using preformed Zn/SiO 2 as the only silicone source. Based on various characterization results, including in situ etching XPS, operando DRIFTS, as well as NMR, it is found that Zn(OH) + and [Zn–O–Zn] 2+ species are active sites for ethane aromatization for zinc-based catalysts, and their dynamic transformation significantly changes reaction performance of ethane dehydrogenation. For the Zn/HZSM-5 catalyst, the existence of a large number of [Zn–O–Zn] 2+ species causes higher initial ethane conversion and higher selectivity of aromatics, resulting in a large amount of coke deposits. Moreover, [Zn–O–Zn] 2+ species on the Zn/HZSM-5 catalyst fast transit to Zn(OH) + species and subsequently form the sintered ZnO species, leading to rapid deactivation. For the Zn@HZSM-5 catalyst, the embedded structure contributes to forming more Zn(OH) + species and delays the transformation of the Zn(OH) + species to [Zn–O–Zn] 2+ species, resulting in slowly increased selectivity of aromatics during the reaction. Therefore, the Zn@HZSM-5 catalyst realizes stable ethane conversion with dynamic selectivity. Graphic Abstract
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Luping Li,Shuang Cheng,Liyu Deng,Ting Liu,Wenju Dong,Yuxiu Liu,Longjun Huang,Huan Yao,Xu Ji
Alkaline nickel–zinc (Ni–Zn) batteries, as traditional rechargeable aqueous batteries, possess an obvious advantage in terms of energy density, but their development has been hindered by the anode-concerned problems, Zn dendrites, self-corrosion, passivation, deformation, and hydrogen evolution reaction (HER). Herein, to solve these problems, a dual protective strategy is proposed toward the anode using ZnO as an initial active material, including a C coating on ZnO (ZnO@C) and a thin poly(vinyl alcohol) (PVA) layer coating on the electrode (ZnO@C-PVA). In a three-electrode configuration, the reversible capacity can reach 600 mAh g–1 for the ZnO@C-PVA. Using excessive commercial Ni(OH)2 as the cathode, the alkaline Ni–Zn cells exhibit good electrochemical performance: Discharge capacity can be as high as 640–650 mAh g–1 at 4 A g–1 with a Coulomb efficiency (CE) as high as 97–99% after activity, suggesting low self-corrosion and HER. Capacity retention is 97% after 1200 cycles, indicating rather good durability. The discharge capacity is even slightly increased with the increase of charge/discharge current density (≤8 A g–1), implying good rate performance. Additionally, the discharge voltage can reach 1.8 V (midpoint value) at various current densities, reflecting the fast reaction kinetics of the anode. Most importantly, no Zn dendrites and passivation are observed after long-term cycling. The strategy proposed here can solve the anode-concerned problems effectively, exhibiting a high application prospect.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Jie Yang,Bo Ruan,Qin Ye,Lung-Chang Tsai,Ning Ma,Tao Jiang,Fang-Chang Tsai
Carbon dots (CDs) was synthesized by hydrothermal method using o -phenylenediamine. The fluorescence property can be used for metal ion sensing, but the solid-state aggregation caused quenching (ACQ) is the troublesome problem to develop the potential applications of carbon dots. Here, the metal-organic framework (MOF) as a host is not only used for restraining the ACQ effect of CDs but also can be constructed by the dual-emitting system (CDs@ZIF-8). Furthermore, CDs@ZIF-8 with dual-emitting centers can be utilized for detecting copper ions as a ratio fluorescence sensor. The CDs@ZIF-8 fluorescence sensor shows excellent sensitivity, selectivity and strong environmental suitability for sensing Cu 2+ ion with the limit of detection (LOD) for Cu 2+ ion is 11.712 μM. The CDs@ZIF-8 fluorescent probe was successfully applied to detect Cu 2+ ions in an aqueous solution. CDs@ZIF-8 shows a new possibility to fabricate fluorescent molecular probes for the determination of heavy metal ions, which is taken on anti-inference in pH, anion and other influence factors.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiaojing Mao,Huachang Li,Yehong Shi,Jiemin Liu,Lijun Kuai,Jijun Liu,Yan Han,Yuexi Huang,Haijiao Xie
Two zinc-based metal-organic frameworks, namely [Zn(L 1 )(Phen)H 2 O] n ( 1 ) and {[Zn(L 2 )(Phen)]⋅(H 2 O)} n ( 2 ), were successfully constructed by mixed ligands strategy (HL 1 =1,4-benzendicarboxylic acid, Phen=1,10-phenanthroline monohydrate, HL 2 =5-hydroxyisophthalic acid), and characterized by X-ray single crystal diffraction, elemental analysis, powder X-ray diffraction (PXRD), etc. The X-ray single crystal diffraction demonstrate that both 1 and 2 show 1D chain structure. The orbital energies of 1, 2 and ligands have been investigated using the Density Functional Theory (DFT) calculations. The fluorescent sensing experimental revealed that both 1 and 2 exhibited excellent selectivity and sensitivity towards Cu 2+ and Co 2+ ions over other metal ions, and the detection limit (LOD) of Cu 2+ and Co 2+ for 1 were 0.077 μM and 0.15 μM, and the LOD of Cu 2+ and Co 2+ for 2 were 0.81 μM and 0.48 μM, respectively. In addition, the fluorescence quenching mechanism of Cu 2+ and Co 2+ can be attributed to energy competitive absorption. Furthermore, in the real sample detection, the recoveries of Cu 2+ and Co 2+ were 92.6 - 109.1 % and 96.7 - 110.0 %, respectively. This work provided a reliable method for the quantitative detection of Cu 2+ and Co 2+ and was successfully applied in river water with satisfactory recovery and precision.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Jun-Fei Gu,Cheng Chen,Somboon Chaemchuen,Wei Sang,Xing-Chuan Li,Ye Yuan,Zongkui Kou,Francis Verpoort
The dehydrogenation of primary alcohols to carboxylic acids is a crucial process in chemical industries such as fibers and plastics. Carboxylic acids, the resulting products, are not only important chemical raw materials but also fundamental pharmaceutical intermediates. Zn-based catalysts have gained attention as a promising option for this transformation owing to their economic cost and abundant reserves. However, stability issues, including structure collapse and morphological changes, have plagued the reported Zn-based catalysts during this transformation. In response to these challenges, this study focused on the design and development of Zn-based catalysts via controlled incorporation of Zn into nitrogen-doped porous carbon to modulate the numbers of defects and Lewis acid-base site pairs. Through extensive screening of various parameters, the best-performing catalyst, namely Zn@NC-800, exhibited high activity and remarkable stability, surpassing all the reported Zn-based catalysts. Moreover, this catalyst demonstrated great recyclability since it could maintain approximately 90 % yields after 9 cycles. Notably, the product formation rate of this catalyst could reach 3833 μmol·g cat . −1 ·h −1 , exceeding that of most reported non-noble metal heterogeneous catalysts. Consequently, this study offers a promising approach for efficiently and stably catalyzing alcohol dehydrogenation reactions using non-noble metals.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Rongming Xu,Meipeng Jian,Qinghua Ji,Chengzhi Hu,Chaochun Tang,Ruiping Liu,Xiwang Zhang,Jiuhui Qu
Owning to the unique structure and dimensionality, two-dimensional (2D) layered nanosheets have received increasing research interests. In this study, for the first time, we evaluate the ability of water stable 2D zinc based metal-organic framework (MOF) nanosheets, Zn(Bim)(OAc), to capture heavy metals in the aquatic system. The obtained novel adsorbent exhibits an ultrathin structure with an average thickness of 7.05 nm. Owning to their ultrathin thickness and highly exposed active sites, the as-prepared ultrathin Zn(Bim)(OAc) nanosheets exhibit the maximum adsorption capacity of 253.8 mg/g for Pb(II) and 335.57 mg/g for Cu(II), respectively, which is far superior adsorptive uptake in contrast to their corresponding bulk-type MOF. Meanwhile, the saturation process was rapid, within 30 min for Cu(II) and 90 min for Pb(II). Intriguingly, Zn(Bim)(OAc) nanosheets own a remarkable selectivity for Pb(II) and Cu(II) over other heavy metal ions in the mixed system, which is attributed to the strong affinity of imino and hydroxyl groups for Pb(II) and Cu(II) within Zn(Bim)(OAc) nanosheets. This work highlights new prospects in designing ultrathin 2D nanoadsorbents for the use in environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2015
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IF 2.752
Hao Li,Sirong Yu,Xiangxiang Han,Enyang Liu,Yan Zhao
This paper reports a simple approach for the preparation of superhydrophobic and oleophobic surface on zinc substrate. The surface was created by chemical etching and hydrothermal reaction, consisting of micro hexagonal prisms with about 4 μm in length, 0–1 μm in gap and 0.1–0.4 μm in diameter. The surface then became superhydrophobic and oleophobic with a fluoride coating, fabricated by chemically modified with perfluorooctanoic acid anhydrous ethanol solution. The effects of different process parameters, including chemical etching time and the hydrothermal temperature, on the surface morphology and wettability were examined using a scanning electron microscope (SEM) and a contact angle tester. The optimization of process parameters were obtained, namely, the chemical etching time was 90 s and the hydrothermal temperature was 95 °C. After zinc surface was treated using the optimum parameters, the results showed that the surface exhibited repellency toward distilled water and edible peanut oil with contact angles at 151.85° and 145.62°, respectively, and the sliding angle for distilled water was less than 10°.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Jie Li,Yue Yin,Lingjing Meng,Hui Qiao,Huan Zhang,Yunfei Cai,Yonglong Zhang,Feiyan Yang,Jinfang Wu,Mei Wu,Jian Liu,Wenbo Wang
Porous attapulgite (ATP) was employed as green container for storing corrosion inhibitors that can enhance both the corrosion inhibition and self-healing properties of organic coatings. The key to realizing ATP containers in smart corrosion resistance is clarifying the influence of ATP's surface charge on inhibitor loading capacity and the degradation behavior of ATP in active corrosion protection, but this aspect is often overlooked. Herein, an effective enhance the physical barrier and active corrosion resistance of the polyvinyl butyne vinyl acetate (PVB) coating by developing ATP containers was proposed. The results indicated that with the incorporation of 0.5 wt% Acid-etched ATP or BTA@ATP, the |Z| 0.01Hz of composite coatings on zinc substrate enhance six times (4.8 × 10 4 Ω cm 2 ) and sixteen times (1.2 × 10 5 Ω cm 2 ) than the pure PVB coating (7.8 × 10 3 Ω cm 2 ), respectively. The corrosion protection mechanism contributes to the filling of cracks with ATP nanocontainers to provide barrier protection, the release of corrosion inhibitors to passivate the damaged areas, as well as the degradation of the ATP itself to form a silicate layer to inhibit the progression of corrosion. Hence, the strategy of ATP nanocontainer preparation will facilitate the high-value utilization of attapulgite and potentially provide guidance for researchers in designing micro/nano-containers.
研究领域:
材料科学
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防腐蚀工程
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DOI
高影响因子
LANGMUIR
·
2019
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IF 3.683
Qiong Ma,Yingying Zhang,Xueping Dang,Jianlin Huang,Youhong Ai,Huaixia Chen
In this work, adsorption behaviors of pyrene (PYR), fluoranthene (FLT), phenanthrene (PHE), and fluorene (FLU) on the coordination cluster [Zn5(H2Ln)6](NO3)4]·8H2O·2CH3OH (Zn5) were studied. The adsorption mechanism and spectrum analyses revealed that the synergistic effect of hydrophobic interaction, π–π stacking, and N–H···π interaction played a crucial role during the adsorption process. The maximum adsorption capacities of PYR, FLT, PHE, and FLU were 406.4, 399.7, 153.7, and 114.3 mg g–1, respectively, resulting from the Langmuir isotherm model. Quick removal of PYR and FLT was found in kinetic experiments with the adsorption equilibrium being reached within 1 min. Competitive adsorption indicated that the adsorption sites for PYR, FLT, PHE, and FLU on Zn5 were identical, and synergistic effects also existed in the adsorption process. Therefore, Zn5 has the potential to be used as an adsorbent in the field of wastewater treatment.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2023
·
IF 6.2
Xiaowen Xu,Hui Lin,Bixia Lin,Lingyi Huang,Pingping Wu,Youjia Wu,Liying Huang
Deferasirox (DEF) is essential for patients with thalassemia requiring long-term transfusion therapy. Tigecycline (TIGE) is a first-line drug for the clinical treatment of complex, severe bacterial infections. The two drugs can be coordinated to treat Pseudomonas aeruginosa infections. Easy and efficient techniques for monitoring these two drugs in biological samples are few. Metal–organic framework (Zn-MOF) prepared from zinc nitrate hexahydrate and dithioglycolic acid has a flower structure. Interestingly, Zn-MOF can cause DEF to aggregate on it and induce DEF luminescence. The principle may be that Zn-MOF limits the vibration and rotation of DEF to avoid its nonradiative jump, which triggers aggregation-induced emission (AIE) and exhibits intense fluorescence. Further investigation revealed that TIGE could decompose Zn-MOF, thus alleviating the inhibitory effect of Zn-MOF on DEF and reducing the fluorescence intensity of DEF@Zn-MOF. A DEF/TIGE detection biosensor was created based on the fluorescence "turn-on" effect of Zn-MOF on DEF and the fluorescence "turn-off" effect of TIGE on DEF@Zn-MOF. The proposed technique was subsequently used to identify DEF/TIGE levels in pharmaceuticals and human plasma. The mean values for the percentage of the labeled amount of DEF/TIGE in DEF dispersible tablets/TIGE injection were 104.5 and 104.9%, respectively. The detection limits for the fluorescence detection of DEF and TIGE were 3.6 and 1.2 nM, respectively. This fluorescence assay is the first application of MOF to the simultaneous detection of DEF and TIGE and has the advantages of rapid sensitivity and high selectivity , providing a new strategy for drug detection.
研究领域:
分析化学
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药物检测
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生物医学工程
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DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 3
·499-507
·
IF 3.1
Tao He,Ji Chengshan,Zhang Jian,Yin Yuanyuan,Jia Wenwen,Jiang Xin,Xu Jie,Yang Yulin
The abuse of tetracycline antibiotics has caused great harm to human health and ecosystems. Developing inexpensive, convenient and sensitive methods for the detection of tetracycline antibiotics is highly desirable. Herein, based on the H 4 ddp ligand [H 4 ddp=3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic acid], two novel zinc-based metal-organic frameworks (MOFs) {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn1-ddp) and {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn2-ddp) were successfully designed by delicate structural regulation. Both Zn1-ddp and Zn2-ddp exhibited excellent water and chemical stability and showed excellent fluorescence quenching performance for tetracycline antibiotics. Notably, the more advanced framework structure and better fluorescent performance make Zn1-ddp more sensitive than Zn2-ddp in fluorescent detection with a detection limit of 0.29 µmol/L for tetracycline (TC), 0.09 µmol/L for doxycycline (DOX), 0.10 µmol/L for minocycline (MIN) and metacycline (MEL), 0.19 µmol/L for chlortetracycline (CTC), and 0.67 µmol/L for oxytetracycline (OTC) among tetracycline antibiotics. The fluorescence quenching mechanism of Zn1-ddp and Zn2-ddp for tetracycline antibiotics detection was deeply investigated. The reasons for the superior detection performance of Zn1-ddp over Zn2-ddp were also analyzed in depth through Fourier transform infrared spectrophotometry (FTIR), X-ray photoelectron spectroscopy (XPS) analysis and framework structure analysis. The developed method opens up a new perspective for antibiotics detection based on zinc-based MOFs.
研究领域:
分析化学
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环境科学
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生物医学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2024
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IF 3.5
Jiayi Qin,Haiyan Zhang,Xianying Cao,Feng Wen,Ke Jiang
Antibiotics are crucial for treating and preventing bacterial infections. However, the widespread use of antibiotics has led to serious antibiotic resistance issues. To address the growing threat of antibiotic-resistant bacterial infections, we designed and synthesized an antibacterial composite material, CCM@ZIF-8@PDA, through a one-pot method and surface modification strategy. This material combines the antibacterial properties of the natural product curcumin, the advantages of ZIF-8, and the photothermal conversion capability of PDA. It exhibits three antibacterial mechanisms against S. aureus: chemical antibacterial, ionic antibacterial, and photothermal antibacterial effects. At a low concentration of 100 ppm, CCM@ZIF-8@PDA achieves a 100% antibacterial rate. This multi-modal antibacterial strategy provides insights for developing new antibacterial materials to combat antibiotic resistance.
研究领域:
生物医学工程
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材料科学
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微生物学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）