INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Chao Liu,Yifei Ye,Zimin Jiang,Ping Xu,Jiaxu Zhang,Jianmin Sun
The combination from hyperbranched polyethylenimine and Lewis acid ZnI2 (PEI/ZnI2) was facilely obtained, and they showed an efficient activity to the reaction of epoxides and CO2 because of these abundant primary, secondary, and tertiary amines of PEI; additionally, ZnI2 made contribution to the activation of epoxide. With 0.15 g PEI-4 (MW 70 000) and the molar percentage of 2.0 mmol % ZnI2 to propylene oxide (PO), 95% yield was achieved at 100 °C, 3.0 h, and 1.0 MPa, and the selectivity was 96%. Moreover, the PEI-4 catalyst preparation avoided toxic solvents and the harsh preparation conditions. Furthermore, PEI-4/ZnI2 was easily recycled from the entire system. The catalytic system maintained excellent recyclability up to eight times with satisfactory activity, and thus, the facile and efficient PEI-4/ZnI2 catalysts were considered as an industrial candidate for the reaction of epoxides and CO2 to cyclic carbonates.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Zhenyang Liu,Chaoqi Hao,Yejing Liu,Rongzhen Wu,Jianen Zhang,Zhuo Chen,Fenghe Wang,Li Guan,Xu Li,Aiwei Tang,Ou Chen
Short-wave infrared (SWIR) light-emitting diodes (LEDs) have emerged as promising technologies for diverse applications such as optical communication, biomedical imaging, surveillance, and machine vision. Colloidal quantum dots (QDs) are particularly attractive for SWIR LEDs due to their solution processability, compatibility with flexible substrates, and tunable absorption and luminescence. However, the presence of toxic elements or precious metals in most SWIR-emitting QDs poses health, environmental, and cost challenges. In this context, CuInS2 (CIS) QDs are known for low toxicity, cost-effective fabrication, and SWIR-light emitting capability. However, CIS QDs have not yet been directly utilized to fabricate SWIR LEDs to date, which is due to low particle stability, inefficient charge carrier recombination, and significantly blue-shifted luminescence after integrating into LED devices. To address challenges, we propose a dual-passivation strategy using ZnI2 as a chemical additive to enhance both the optical property of plain CIS QDs and charge carrier recombination upon LED device implementation. The resulting CIS-QD-based LEDs exhibit a stable SWIR electroluminescence (EL) peak (over 1000 nm) with a high EL radiance and a record external quantum efficiency in the SWIR region. Our study represents a significant step forward in SWIR-QLED technology, offering a pathway for the development of high-performance, low-cost, and nontoxic SWIR light sources.
研究领域:
材料科学
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光电子学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2017
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IF 2.238
Shuangqiang Yue,Mu Gu,Xiaolin Liu,Juannan Zhang,Shiming Huang,Bo Liu,Chen Ni
γ-CuI single crystal was grown via evaporation method in ZnI 2 acetonitrile solvent. The ZnI 2 plays a unique role which can not only increase the solubility of CuI in acetonitrile but also introduce the Zn and I ions in the crystal. The γ-CuI crystal grown in ZnI 2 acetonitrile is regular and transparent. Its size reaches up to 18 × 11 × 2 mm 3 which is larger than that of the crystal grown in pure acetonitrile. In terms of the photoluminescence , the intensity of the emission at 411 nm of the crystal grown with ZnI 2 as a cosolute is much higher than that of the crystal grown without ZnI 2 , which implies that the crystallinity of the crystal can be improved by ZnI 2 doping. The X-ray excited luminescence of the crystal shows that the emission at 435 nm can be significantly enhanced and the emission near 680 nm can be suppressed by introducing Zn and I in the natural non-stoichiometry γ-CuI crystal. The nature of the phenomena is discussed. The decay time of the emission at 435 nm similar to that of the emission at 411 nm is faster than the detection limit of the instrument, i.e. less than 1 ns, and the average decay time of the emission near 680 nm is about 183 ns. The results can provide a useful guide to optimize the scintillation properties of γ-CuI single crystal.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 41
·16164-16168
·
IF 3.069
Shangqing Chen,Zheng Wang,Jiayin Hu,Yafei Guo,Tianlong Deng
The readily available ZnI2/NEt3 system was used firstly to catalyze the transformation of CO2 and 2-aminobenzonitriles into quinazoline-2,4(1H,3H)-diones at room temperature and low CO2 pressure in high yields. Further experiments indicated that this ZnI2/NEt3 system has excellent effects on activating both amino and cyano groups.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Chaokun Yang,Mengshuai Liu,Jiaxu Zhang,Xin Wang,Yichen Jiang,Jianmin Sun
The cycloaddition of CO 2 to epoxides is an important reaction and has got increasing attention. In this work, a series of DBU-based ionic liquids (DILs) were synthesized via facile neutralization of superbase 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) with corresponding hydrogen bond donor acids, such as D(−)-tartaric acid (TA), malic acid (MA) and succinic acid (SA). The DILs cooperated with ZnI 2 were first evaluated in detail for catalyzing the coupling reaction of CO 2 with propylene oxide (PO), and DIL-1 exhibited obviously enhanced catalytic activity under 80 °C, 3 MPa and solvent-free conditions. The effects of reaction parameters on the activity for propylene carbonate (PC) synthesis were thoroughly investigated, and a possible synergistic catalytic mechanism was proposed. The catalytic system reported here could be separated by simple centrifugation from the products after reaction and then reused efficiently. Moreover, the catalytic system showed the advantages of simple synthesis, high catalytic activity, low cost, and substrate versatility for CO 2 conversion to cyclic carbonates.
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Renwu Feng,Qingying Li,Haozhen Dou,Yihan Xie,Jinliang Yan,Mi Xu,Dan Luo,Zhile Yang,Yuanjun Guo,Xinru Wu,Xin Wang,Zhongwei Chen
Aqueous zinc ion batteries (ZIBs) are promising energy storage technologies, but face formidable challenges from hydrogen evolution reaction, dendrite growth, and active material shuttle. However, how to manipulate the electrolyte structure at the nanoscale to boost battery performance remains largely unexplored. Herein, nanodomain electrolytes with structural nano-heterogeneity are developed by introducing α-Dipole Unit as co-solute and through their self-assembly, which enables precise control over ion-transport kinetics and interfacial reversibility of both anode and cathode. The ionized α-dipole units self-aggregate to form clusters induced by the dipole effect, which not only reconstructs hydrogen bond network of electrolyte and realizes the rapid diffusion of Zn 2+ to obtain HER/dendrite-free Zn anode, but also serves as barrier to inhibit the shuttle effect of I 3 − via repulsion-capture synergy mechanism. Remarkably, the Zn symmetric cells can still maintain a satisfactory cycle life at a low temperature of −20 °C, and the capacity retention rate of the assembled Zn I 2 battery is as high as 94.31 % after 13,000 cycles. This pioneering attempt to manipulate electrolyte nanostructure reveals a new dimension in electrolyte design for high-performance batteries.
研究领域:
储能
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电化学
·
材料科学
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电池技术
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纳米技术
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产品关联
DOI
高影响因子
TETRAHEDRON LETTERS
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2012
·
IF 2.683
Gong-Qing Liu,Wei Li,Yu-Mei Wang,Zhen-Ying Ding,Yue-Ming Li
Zinc halide-promoted hydroamination of 4-penten-1-amine compounds was studied. Preliminary results indicated that both steric and electronic factors are crucial for this Lewis acid-promoted reaction. ZnI 2 gave the most promising results and the reactivity could be further increased upon addition of a suitable ligand. Up to 95% isolated yields were obtained when the reactions were carried out in 1,4-dioxane in the presence of 10 mol % of ZnI 2 and 8-hydroxyquinoline.
研究领域:
有机化学
·
催化反应
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Chaokun Yang,Yanglin Chen,Ping Xu,Li Yang,Jiaxu Zhang,Jianmin Sun
Multifunctional monocomponent zinc halide-based ionic liquids, amidinothiourea-ZnI 2 (ATUI) and N-phenylthiourea-ZnI 2 (NTUI), were facilely developed as homogeneous catalysts for efficient conversion of CO 2 with epoxides to cyclic carbonates. On account of synergistic effects of multifunctional components in ATUI, the propylene carbonate yield could reach 95% under 110 °C, 1.0 MPa, 4.0 h or even mild conditions. There was a slight decrease of propylene carbonate yield because of the loss of ATUI during the reuse process. Additionally, the universality of ATUI was also studied to other terminal epoxides. Meanwhile, a plausible reaction mechanism was proposed where the synergistic effects involving cation structure and halogen anion of ATUI guarantee the cycloaddition reaction to proceed effectively under solvent and co-catalyst free condition. Finally, reaction kinetics were undertaken to compare the catalytic efficiency of ATUI and NTUI so as to compare the catalytic activity of different numbers of hydrogen bond donor in amidinothiourea and N-phenylthiourea.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Junhui He,Qian Zhao,Yuhang Chen,Taotao Gao,Huaipu Zhu,Yujue Wang,Xiaoqin Li,Dan Xiao,Qu Yue
Aqueous zinc‑iodine (Zn I 2 ) batteries are considered promising energy storage systems due to their high energy density, improved safety, and low cost. However, their advanced performances are severely limited by the sluggish redox kinetics of iodine and the polyiodide shuttling effect, which leads to irreversible loss of active material and zinc anode corrosion, thereby degrading cycling stability and overall performance. In this work, copper acetylacetonate (Cu(acac) 2 ) is employed as a metal-organic molecular catalyst to construct high-performance and long-lasting Zn I 2 batteries. Material characterizations and density functional theory calculations reveal that Cu(acac) 2 exhibits dual functionalities: (1) chemically adsorbing iodide/polyiodide species to suppress the shuttling effect, and (2) catalyzing iodine redox reactions to enhance reaction kinetics. The Zn-I₂ batteries assembled with Cu(acac) 2 as the cathode material can achieve an extraordinary cycling lifespan of over 55,000 cycles at 4 A g −1 with a minimal capacity decay rate of 0.00086 % per cycle, along with an average coulombic efficiency of 99.86 %, surpassing the performance of carbon-based cathodes. In-situ Raman spectroscopy further demonstrates that Zn I 2 batteries using Cu(acac) 2 cathodes maintain significantly lower polyiodide concentrations during charge/discharge processes compared to those using active carbon cathodes, confirming its dual role in suppressing shuttling and catalyzing reactions. This work highlights the effectiveness of molecular catalysts in mitigating polyiodide shuttling and offers a novel approach to developing high-performance aqueous Zn I 2 batteries.
研究领域:
储能
·
材料科学
·
电化学
·
催化
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2023
·
IF 4.3
Yu Zhong,Kama Huang,Nanya Zhong,Yijun Wang,Wenqi Chen
The traditional cathode low-pressure Hg lamp is the most mainstream UV light source in degrading organic wastewater but with significant limitations of short lifetime, environmental hazard and poor degradation efficiency. Here, we evaluate a self-designed microwave-driven ZnI 2 deep-UV lamp on degrading Rhodamine B (RhB), methylene blue (MB), and p-nitrophenol (PNP). An electrodeless Hg lamp was used as control. First we investigated the emission wavelength, spatial radiation distribution, the effect of power on radiation intensity, and relative permittivity of ZnI 2 lamp. Then the degradation rate, kinetics and energy yield on degrading RhB, MB and PNP as well as the cost were studied. ZnI 2 lamp showed shorter wavelengths, approaching UVC radiation intensity, approaching attenuation factor and higher microwave coupling capability to Hg lamp. After treatment with ZnI 2 lamp for 10, 6 and 15 min, 5 mg/L of RhB, MB and PNP can reach 100% removal rates. Moreover, higher degradation rate and kinetic constants of ZnI 2 lamp for 3 compounds than the Hg lamp in this paper and in the literature were achieved. With the assistance of microwave and properties of environmental-friendly and low cost, ZnI 2 lamp provides a new alternative to traditional Hg lamp and wastewater photochemical treatment method.
研究领域:
环境科学
·
光化学技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Yumeng Gao,Jiudi Zhang,Siyu Liu,Junming Jiang,Qi Zhou,Xiuwei Sun,Jiabao Zhang,Qi Zhang
Zinc-iodine (Zn I 2 ) batteries have become one of the research hotspots in recent years in the field of energy storage due to their abundant resources, environmental friendliness, low price, high theoretical capacity (211 mAh g −1 ), and low redox potential. However, the polyiodide shuttle effect is a key challenge. In this work, carbon nanotubes interpenetrating ordered micro mesoporous carbon spheres embedded with fine Fe 3 C nanocrystals (Fe 3 C/CNTs/OMMC) were synthesized by a simple method and used to act as an iodine host material. Benefiting from the unique micro mesoporous structure of OMMC and fine Fe 3 C nanocrystals with abundant active sites, Fe 3 C/CNTs/OMMC has achieved physical confinement and chemical adsorption/catalysis of polyiodides. Meanwhile, highly conductive CNTs facilitate rapid electron conduction and accelerate the reaction. Thus, the Zn I 2 battery using Fe 3 C/CNTs/OMMC-I 2 exhibited excellent cycling stability and good electrochemical performance. It was found that the initial specific capacity was high at a current density of 5 A g −1 , and that 164 mAh g −1 capacity remained after 10,000 cycles. The capacity retention percentage was 82 % after 17,000 cycles at a current density of 10 A g −1 .
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Xinxing Zhan,Ao Xu,Jiakai Zhang,Xiubin Ren,Yangyang Wang,Xin Tong,Yi Shao,Gang Wang,Xiaojie Liu
Aqueous zinc‑iodine batteries (AZIBs) have been considered due to the significant potential for multi-electron transfer reactions and a high theoretical capacity of 211 mAh g −1 and a considerable output potential. Nevertheless, aqueous Zn I 2 batteries face some formidable challenges in conventional aqueous electrolytes, including catastrophic Zn dendrite hyperplasia and severe parasitic reactions, and terrible shuttle effect of polyiodides. To address these concerns, it has been recognized that hydrogel electrolyte (HE) can effectively block the active water molecules and coordinate with Zn 2+ , thus inhibiting the growth of zinc dendrites and meanwhile can mitigate the shuttle effects. Herein, anionic polyacrylamide (PAM) hydrogel electrolyte with immobilization of organic molecule of amber acid with carboxyl functional groups elaborately designed with bifunctional mechanism to address the adverse reactions simultaneously on both Zn anode and I 2 cathode. The immobilization of organic additives can build suitable ion transport highways for the modulation of Zn 2+ and polyiodides transport kinetics toward ultra-stable aqueous Zn I 2 Batteries. Eventually, as a proof of demonstration, the assembled PAM/AA based aqueous Zn I 2 cell can yield an remarkable rate performance and a high and maintained capacity of 138 mAh g −1 over 15,000 cycles with a negligible decay rate of 0.005 ‰ per cycle at a high current of 5 Ag −1 .
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）