RSC Advances
·
2015
·Vol. 5
·期 70
·56478-56485
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IF 3.84
Guozhi Fan,Shanshan Luo,Qiang Wu,Tao Fang,Jianfen Li,Guangsen Song
A magnetic Fe3O4@SiO2–ZnBr2 catalyst was prepared by supporting ZnBr2 on silica-coated magnetic nanoparticles of Fe3O4 and used as a recoverable catalyst for the direct synthesis of diphenyl carbonate (DPC) from CO2 and phenol in the presence of carbon tetrachloride. The as-prepared catalyst was characterized by infrared spectroscopy (IR), powder X-ray diffraction (XRD), a X-ray photoelectron spectrometer (XPS) and BET. Zn loading in the supported catalyst and leaching during the reaction process were determined by atomic absorption spectroscopy (AAS). It was found that Fe3O4@SiO2–ZnBr2 showed higher catalytic activity than homogenous ZnCl2 and ZnI2 as well as homogenous ZnBr2. With this new catalyst under optimized conditions, a yield of DPC at 28.1% was obtained. The heterogeneous catalyst Fe3O4@SiO2–ZnBr2 can also be recovered by a permanent magnet after the reaction and reused up to 4 times without noticeable deactivation.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Xueqing Shi,Lvye Yang,Jianfeng Yao
A new simple preparation method for water-in-salt-type cellulose hydrogels filled with ZnBr 2 is reported. The ZnBr 2 hydrogel electrolyte can be applied to zinc-ion hybrid supercapacitors and Zn–Br interfacial batteries. The water-in-salt ZnBr 2 hydrogel serves as a stable electrolyte for good electrochemical performance in zinc-ion hybrid supercapacitors without redox reactions and can participate in the charging/discharging process of the Zn–Br interfacial battery through the redox reaction of halogen anions. The assembled zinc-ion hybrid supercapacitor exhibits a specific capacitance of 241.8 F g −1 at 0.5 A g −1 . Furthermore, after a 10,000-cycle-long charging/discharging test at 5 A g −1 , the coulombic efficiency is found at nearly 100 %. The interfacial battery reaches the highest energy efficiency of 66 % at a current density of 3 mA cm −2 at 0–1.8 V and displays a good cycle life with an 88 % average coulombic efficiency at 3 mA cm −2 . This work expands the application of hydrogels and provides new possibilities for optimizing the high performance of electrolytes.
研究领域:
材料科学
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能源存储
·
电化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Mengshuai Liu,Bo Liu,Shifa Zhong,Lei Shi,Lin Liang,Jianmin Sun
In this contribution, a series of N-heterocyclic compounds cooperated with ZnBr2 catalyst for chemical fixation of CO2 to cyclic carbonates was developed without utilization of additional organic solvents. It was found that the catalytic activity of N-heterocyclic compounds could be obviously enhanced in the presence of ZnBr2, and the N-methylimidazole (Mim)/ZnBr2 catalytic system was the most efficient among the catalysts employed. Under the optimum reaction conditions, 99% yield of propylene carbonate was achieved with TOF of 474 h–1, and the catalysts were also versatile for CO2 cycloaddition with less active epoxides such as styrene oxide and cyclohexene oxide. Furthermore, a possible synergistic catalytic mechanism was proposed. Moreover, the rate constants were determined as a function of reaction temperature in the range of 130–160 °C, the activation energy was determined to be 41.1 kJ·mol–1, and the kinetic equation on the synthesis of propylene carbonate catalyzed by Mim/ZnBr2 was also obtained.
研究领域:
化学工程
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催化化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiangyu Wang,Lifeng Li,Xinyi Xie,Xinping Ouyang,Xueqing Qiu,Qinzhen Fan,Lihua Cheng
The fractionation of lignocellulose is the key step for its efficient utilization. A mild fractionation process was proposed for producing glucan oligomers and high purity lignin using ZnBr 2 molten salt hydrate (ZnBr 2 -MSH). It was found that the cellulose could be hydrolyzed rapidly using ZnBr 2 -MSH with a slight amount of acid (ZnBr 2 -AMSH), giving as high as 88.0 % yield of glucan oligomers together with 92.4 % purity of lignin at 90 °C for 20 min. The long-time molecular dynamics simulation indicated that ZnBr 2 -MSH had more free Br ions to form hydrogen bonds (H-bonds) with H atom in hydroxyl and Zn ions with stronger coordination ability to O atoms in hydroxyl, and hence exhibited that stronger ability to destruct the H-bonds among cellulose bundles. Therefore, ZnBr 2 -MSH could deconstruct cellulose crystal under mild conditions. The lignin obtained by fractionation of ZnBr 2 -AMSH contained more polar functional groups, demonstrating its potential application in a binder for hard carbon (HC) anode in sodium-ion battery, and the resultant electrode contributed to good electrochemical performances and cycling stability. This research work provides a promising approach for efficient fractionation and application of the three components in lignocellulose.
研究领域:
生物质化学
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材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yanwen Jing,Yanqi Lv,Ke Wang,Zhimin Xu,Xingfu Zhou
The organic-inorganic perovskite solar cells (PSCs) have recently attracted significant attention owing to their remarkable photovoltaic performance . Herein, we fabricate a novel perovskite absorber Cs 0.05 (FA 0.83 MA 0.17 ) 0.95 Pb 1−x Zn x (I 0.83 Br 0.17 ) 3 by using ZnBr 2 as an additive. The introduction of zinc increases the grain size and reduces the grain boundary defects. At the optimized concentration of 0.5 mol% ZnBr 2 additive, the x-ray diffraction (XRD) shows the perfect crystallization of the perovskite film. The enhanced crystallization of the perovskite structure suppresses the non-radiative recombination loss and prolongs the carrier lifetime. The optimized PSC presents a champion power conversion efficiency (PCE) of 15.64 % and shows a negligible hysteresis effect. Moreover, the increased built-in electric field (V bi ) between the n-type Zn doped perovskite and the p-type CuSCN creates more driving force for the separation of photogenerated carriers and increases the open-circuit photovoltage (V oc ) of the device. The unencapsulated device maintains more than 87 % of its original PCE after aging for 90 days in the ambient condition, while the control device can only maintain 60 % of its original PCE. These results suggest that the simple B-site ion-doped perovskite could be a good option for the future improvement of PSCs.
研究领域:
材料科学
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光伏技术
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能源研究
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DOI
高影响因子
ACS Applied Electronic Materials
·
2021
·
IF 3.314
Shicai Geng,Yanwei Wen,Binze Zhou,Zhaojie Wang,Zhaojin Wang,Pengfei Wang,Yao Jing,Kun Cao,Kai Wang,Rong Chen
Carrier balance and ion diffusive inhibition are crucial to the external quantum efficiency (EQE) and stability of perovskite quantum dot light-emitting diodes (PQLEDs). Herein, an inorganic ZnBr2 ligand is used to passivate the Br vacancy on the surface of the perovskite quantum dots and, thus, near-unity photoluminescence quantum yield is achieved. With respect to energy alignment and carrier balance, poly[bis(4-phenyl) (4-butylphenyl) amine] (poly-TPD) is chosen to match with 1,3,5-tris (1-phenyl-1H-benzimidazol-2-yl) benzene (TPBi), and the fabricated PQLEDs exhibit the maximum luminance as high as 92,279 cd m–2. In addition, an ultrathin Al2O3 layer is introduced between indium tin oxide (ITO) and poly(ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS) via atomic layer deposition (ALD). The Al2O3 buffer layer can precisely control the hole transmission rate, balance the carrier injection, and realize the improvement of EQE from 2.86 to 4.81%. The T50 lifetime of the device is extended by about 30 times due to suppression of metal ion diffusion from ITO to the emission layer. Our work demonstrates the promising fabrication of highly efficient and stable PQLEDs via ALD interface engineering.
研究领域:
材料科学
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光电领域
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纳米技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 19
·16127-16137
·
IF 3.201
Hongguang Liang,Junwei Wang,Qifeng Li,Chen Liang,Yuelan Feng,Maoqing Kang
The cycloaddition reaction of carbon dioxide (CO2) and bisepoxides is an interesting route for CO2 utilization and green non-isocyanate polyurethane (NIPU) synthesis. In this work, a series of γ-Al2O3 supported ZnBr2 and carbon nitride complex catalysts (Zn–CN/γ-Al2O3) were prepared by a simple thermal polymerization method and applied to the cycloaddition reaction. The results showed that 0.05Zn–CN/γ-Al2O3 exhibited high catalytic activity, over which 91.4% 1,4-butanediol diglycidyl ether (BDODGE) conversion and 98.9% cyclic carbonate selectivity were acquired under solvent and co-catalyst free conditions. The relationship between the structural properties and catalytic performance of Zn–CN/γ-Al2O3 catalysts was studied in detail. It is found that the high surface area and the synergistic effect of Lewis acid–base duality are key factors for the high activity of catalysts. Introducing ZnBr2 could provide acid sites and induce structure change of carbon nitride, which could determine the basic intensity of catalysts. Moreover, based on the elaborate discussions, a plausible catalytic reaction mechanism was proposed.
研究领域:
催化
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化学工程
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绿色化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Lian-Jie Zhao,Jia-Ran Li,Yu Li,Li-Li Sun,Shao-Ni Sun,Xue-Fei Cao
The development of low-cost and high-performance water purification adsorbents has attracted increasingly attentions. In this work, corn stalk pith (CSP) and chitosan rich in amino groups were treated with ZnBr 2 ·4H 2 O to prepare lignocellulosic aerogels (LAs) and lignocellulose-chitosan composite aerogels (LCAs) for wastewater treatment. The effects of the ZnBr 2 ·4H 2 O treatment time and the addition of chitosan on the structure and adsorption performance of the aerogels were evaluated. The results showed that the lignocellulosic aerogel LA 15 had a three-dimensional porous structure and the optimal adsorption capacity of which reached 489.4 mg/g for Congo red. After the addition of chitosan, the adsorption performance and the adsorption behavior of LCA 10 for Congo red were evaluated in detail. The maximum adsorption capacity of the prepared LCA 10 for Congo red was up to 641.5 mg/g, which was 31 % higher than that of LA 15 . Adsorption kinetics suggested that the adsorption of Congo red on LCA 10 followed the pseudo-second-order kinetic and the Langmuir isotherm model, indicating that the adsorption was dominated by chemical adsorption and the adsorption of Congo red was mainly occurred on the surfaces of LCA 10 . This study provides a simple method for preparing high-performance dye adsorbents under mild conditions.
研究领域:
环境科学
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材料科学
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水净化
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聚合物复合材料
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiangyu Li,Siyu Han,Dongshu Chen,Xiang Li,Kuihong Lv,Jie Ren,Bai Wang,Jianshe Hu
ZnBr 2 -regulated PIL/FPIL platform enables multimodal wearable sensing. • PIL-16.5 senses 0–800% strain with GF up to 5.54 and 1000-cycle stability. • Thin FPIL detects humidity, pulse, and respiration signals for wearable use. • K-means-assisted Random Forest identifies four breathing states with 95% accuracy. Soft ionic conductors are promising materials for wearable electronics, yet their practical application remains limited by the difficulty of balancing mechanical robustness, ionic transport, and multimodal sensing within a single material system. Herein, we report a ZnBr 2 -enhanced poly(ionic liquid) elastomer (PIL) prepared by UV polymerization of a [VEIM]Br-derived ionic precursor. Spectroscopic analyses, XPS, and DFT calculations indicate that ZnBr 2 reorganizes bromide-rich ionic environments within the PIL network, providing a structural basis for balancing network reinforcement and ion migration. The optimized PIL-16.5 exhibits a strain-sensing range of 0–800%, segmented gauge factors of up to 5.54, and stable electrical output over 1000 cycles at 100% strain. It also exhibits water-assisted self-healing at room temperature, recovering 89.5 ± 3.5% of its fracture strain and 87.4 ± 6.8% of its toughness, together with solution-assisted recyclability. Beyond mechanical sensing, the elastomer shows clear electrical responses to temperature and humidity, supporting multimodal sensing. This material supports wearable monitoring of joint movement, arterial pulse, and respiration. Furthermore, a machine-learning workflow was used to analyze respiratory signals, enabling differentiation among four respiratory states with an average classification accuracy of approximately 95% and demonstrating the feasibility of lightweight, data-driven physiological-state recognition. This work establishes a PIL-based sensing platform that combines large deformability, recoverability, multimodal responsiveness, and compatibility with data-driven analysis, showing potential for respiratory monitoring and wearable health applications. Download: Download high-res image (257KB) Download: Download full-size image
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Xue Zhang,Yang Zhou,Linwei Peng,Zhuohan Lin,Yiyang Chang,Zhangfeng Zhou,Yan Li
Quantum-confined CsPbBr3 nanoplatelets (NPLs) with narrow full width at half-maximum (FWHM), large exciton binding energies, and precisely tunable thickness have become one of the promising materials for lighting and display. Still, the synthesis of CsPbBr3 NPLs with high photoluminescence (PL) intensity and excellent stability is challenging, hindering their large-scale application in lighting devices. Herein, we present a facile post-treatment strategy to enhance the PL performance of CsPbBr3 NPLs by surface passivation with a ZnBr2 solution. The ZnBr2-treated CsPbBr3 NPLs exhibit 90% photoluminescence quantum yield (PLQY) in the dispersion at 461 nm and 50% PLQY in thin films. Benefiting from surface defect passivation and ion migration suppression, ZnBr2-treated CsPbBr3 NPLs exhibit outstanding stability over pristine CsPbBr3 NPLs during long-term storage and exposure to a polar solution, light, and heating treatment. Specifically, the PL intensity of ZnBr2-treated CsPbBr3 NPLs dispersion shows a little decrease after storage at ambient conditions for 50 days or after mixing with ethanol for 160 h. Under challenging conditions including exposure to ultraviolet light for 300 h or heating at 70 °C for 30 min, their PLQY decreases only slightly.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Can Fang,Zhouxian Wang,Jingxu Han,Ning Zhou,Tonghao Dai,Zhifeng Dai,Yubing Xiong
Mounting concerns over climate change driven by anthropogenic greenhouse gas emissions have intensified demands for technologies that enable efficient conversion of CO2 into value-added chemicals. We report a bifunctional heterogeneous catalyst ZnBr2@PIL-VIm-Bpy, engineered through in situ metal coordination and radical polymerization, to co-anchor Lewis acidic ZnBr2-bipyridine complexes and nucleophilic imidazolium species within a porous ionic polymer matrix. Multimodal characterization (including solid-state NMR, XPS, FT-IR, etc.) verified the successful heterogenization of dual active sites in ZnBr2@PIL-VIm-Bpy. The obtained material exhibits excellent catalytic activity in CO2 cycloaddition reactions, and the conversion can reach 98.0% with a selectivity of 99.0% within 48 h at relatively mild conditions, comparable with those of homogeneous ionic liquids of VIm-Bpy and a binary catalytic system of ZnBr2+VIm-Bpy. The catalyst ZnBr2@PIL-VIm-Bpy can be easily separated from the product and can be reused at least 5 times without significant loss of catalytic activity, demonstrating excellent reusability and robustness. Especially, when the catalyst is applied to industrial flue gas conditions with low concentrations of CO2, a conversion of 85.5% can still be achieved in 96 h, which even surpasses the homogeneous catalysts of VIm-Bpy and ZnBr2+VIm-Bpy, confirming its outstanding catalytic performance in the elimination of low concentrations of CO2. This work establishes a heterogenization strategy combining enzymatic-like cooperativity with heterogeneous catalysts’ practicality, demonstrating particular promise for point-source carbon capture–utilization integration.
研究领域:
化学工程
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环境科学
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材料科学
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高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 2
·801-813
·
IF 6.123
Wei Chunjie,Liu Gang,Xie Yujiao,Sun Zhongyuan,Liu Chang,Song Feng,Cui Hongyou
Molten salt hydrate (MSH) is a good solvent for cellulose dissolution and an effective catalyst for cellulose conversion. In this work, a series of MSH was evaluated in terms of cellulose dissolvability, regeneration performance, and catalytic activity in cellulose conversion into 5-hydroxymethylfurfural (HMF). ZnBr 2 ·3H 2 O–LiCl·3H 2 O showed good performance on cellulose dissolution and conversion. The effects of ZnBr 2 ·3H 2 O concentration, reaction temperature, and time on cellulose conversion into HMF in ZnBr 2 ·3H 2 O–LiCl·3H 2 O were optimized, and 48.7% HMF yield was reached at 60 wt.% ZnBr 2 ·3H 2 O. The species of ZnBr 2 ·3H 2 O–LiCl·3H 2 O were analyzed, and the function of species concentration was correlated with the product yield from the conversion of fructose. It was found that Br − and H + were the active species for fructose dehydration into HMF. ZnBr 3 − and H + catalyzed the conversion of fructose into furfural, which competed with the production of HMF. The reaction mechanism was proposed to understand the cooperate of species in MSH for cellulose conversion.
研究领域:
化学工程
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催化
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生物化工
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DOI
高影响因子
危险品化学品经营许可证（带存储）