JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jingbao Wang,Jingmao Zhao,Mohammad Tabish,Lijun Peng,Qi Cheng,Fan Shi
The long-term corrosion inhibition for AA5052 aluminum alloy was achieved by the hybrid inhibitor combined by rosemary extract (RSE) and zinc chloride (ZnCl 2 ) which could offer more than 30 days of protection for AA5052 Al alloy in a 0.05 M NaCl solution. The highest efficiency of ZnCl 2 , RSE, and hybrid inhibitor (ZR) reached 67.34 %, 88.41 % and 96.48 % at 2000 ppm, respectively. The excellent inhibition performance of the hybrid inhibitor was attributed to the synergism between RSE and ZnCl 2 . The electrochemical measurements show that the long-term inhibition performance is due to the combination of adsorption film and Zn oxide/hydroxide precipitated film.
研究领域:
材料科学
·
电化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Ying Li,Peng Liu,Cong Ma,Na Zhang,Xiaoqin Shang,Liming Wang,Fengwei Xie
As high-amylose starch (HAS) has a higher content of linearly structured chains than other types of starch, it is more scientifically interesting to realize enhanced properties or new functions for food and materials applications. However, the full dissolution of the compact granule structure of HAS is challenging under moderate conditions, which limits its applications. Here, we have revealed that the granule structure of HAS can be easily destructed by certain concentrations of acidic ZnCl2, neutral MgCl2, and alkaline CaCl2 solutions (43, 34, and 31 wt %, respectively) at a moderate temperature (under 50 °C). The ZnCl2 and CaCl2 solutions resulted in complete dissolution of HAS granules, whereas small amounts of HAS granule remnants still existed in the MgCl2 solution. The regenerated starch from the CaCl2 solution was completely amorphous, that from the ZnCl2 solution only presented a weak peak at 17°, and that from the MgCl2 solution contained V-type crystallites. No new reflections were found on the FTIR spectra indicating that all these three chloride solutions can be considered as a nonderivatizing solvent for starch. In all the three cases, nanoparticles were formed in the regenerated starch, which could be due to the aggregation of starch chains or their complexation with the metal cation. In addition, their water absorption ratio was 1.5 to 3 times that of the control (treated in water).
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Heng Zhang,Keli Chen,Xin Gao,Quanqing Han,Lincai Peng
In this study, an improved facile cellulose dissolution with low chemical concentration process was used for preparing corn stalk pith regenerated cellulose (RC) films. The conventional method usually requires 68% zinc chloride solution for cellulose dissolution. The objective of this study is produced corn stalk pith RC films by using a low-concentration zinc chloride solution with improved thermal stability. The major weight loss peak temperature of RC films was increased from 231 °C to 307 °C as the crystallinity indexes increased from 48.30% to 53.19% by decreased the concentration of zinc chloride solution from 65% to 45%, respectively. The increased thermal stability can create new opportunities for the development of RC films dissolving by zinc chloride solution.
研究领域:
材料科学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Bin Hu,Wen-luan Xie,Yu-ting Wu,Ji Liu,Shan-wei Ma,Ti-peng Wang,Shu Zheng,Qiang Lu
Furfural (FF) is a promising platform compound that can be selectively produced by the fast pyrolysis of xylan-based biomass in the presence of zinc chloride (ZnCl 2 ). Whereas, the catalytic effect of ZnCl 2 and the FF formation mechanism remain uncovered. The present work aims to give a deep insight into the formation mechanism of FF under the catalysis of ZnCl 2 by combining quantum chemistry calculations and fast pyrolysis experiments. Density functional theory (DFT) calculations and fast pyrolysis experiments were conducted with xylose as the model compound. ZnCl 2 affects the pyrolysis reactions through the binding of Zn atom and O atom of xylose initially, with manifest electron exchange between Zn and O. The activation free energies of the pyrolysis reactions can be decreased when ZnCl 2 stays at the reaction center of the transition states. Both ring-opening and 1,2-dehydration can be promoted by ZnCl 2 , whereas ring-contraction is hindered by ZnCl 2 because ZnCl 2 is away from the reaction center of the ring-contraction. Due to the distinct influence of ZnCl 2 on different reactions, the rate-determining steps in some of the possible FF formation pathways are changed. Hence, the competitiveness of these pathways is altered to a great degree, which should be responsible for the selective production of FF. Xylose tends to generate FF through the acyclic d -xylose decomposition channel due to the catalysis of ZnCl 2 . The most favorable FF generation pathway involves the successive cyclization, 1,2-dehydration between 2-OH and 1-H, electrocyclic dehydration, and 1,2-dehydration between 4-OH and 5-H following the formation of a d -xylulose intermediate.
研究领域:
化学工程
·
催化反应机制
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Zhihao Bi,Bin Lai,Yi Zhao,Lifeng Yan
Lignocellulose is a complex of cellulose, hemicellulose, and lignin, whose overall conversion is still a challenge, especially by a fast and efficient method. Here, a very simple method has been developed using acidic molten salt of zinc chloride hydrate as the solvent and catalyst for complete disassembly of lignocellulose at 95 °C and atmospheric pressure in 12 min. The major products are lignin and monosaccharides, such as glucose and xylose. It was found that high-purity lignin in yield of about 20 wt % can be obtained with various biomass, and the maximum yield of glucose from bamboo is 40.56 wt % and that of xylose from wheat straw is 16.82 wt %. Importantly, zinc chloride can be recovered through precipitation by ammonia and reused for next cycles. It provides a simple route to separate and efficiently convert lignocellulose, especially high-grade feedstock for biorefinery.
研究领域:
生物化学
·
可再生资源工程
✓ 已验证
产品关联
DOI
PubMed
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 43
·98490-98501
·
IF 5.8
Peng Shuwei,Wei Yanfu,Huang Yiming,Wei Longmeng,Chen Pengcheng
The antibiotic ciprofloxacin (CIP) is used to treat a variety of bacterial infections, yet it poses significant health risks to aquatic environments. While adsorption is a promising technique for CIP removal, current adsorption capacities remain limited. In this study, we introduce a diatomite and basic zinc chloride composite (ZnHC-Dt) prepared using a straightforward deposition method, with the ability to achieve highly efficient ciprofloxacin removal. ZnHC-Dt is characterized using field emission scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and the Brunauer–Emmett–Teller method (BET). We also assess the zeta potential. The optimized ZnHC-Dt adsorbent, achieved at a mass ratio of 0.45 with ZnHC/(ZnHC+Dt), is adopted with a CIP adsorption capacity of 831.96 mg/g at 25 °C, broad pH adaptability (within 3.0–10.0), rapid adsorption rate (reaching equilibrium in 4 h), and stable performance under Na + ionic strength. The CIP adsorption process follows pseudo-second-order kinetics and aligns well with the Langmuir adsorption model. The high adsorption capacity of ZnHC-Dt can be attributed to electrostatic attraction, hydrogen bonding, surface complexation, and available adsorption sites. During the desorption process, the CIP removal rate retains 65.33% effectiveness after five cycles. The results suggest that ZnHC-Dt holds significant potential for CIP removal in aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2013
·Vol. 26
·期 3
·355-360
·
IF 0.632
Lai Bin,Zhao Yi,Yan Li‐feng
The conversion of cellulose to 5‐hydroxymethylfurfural (HMF) has been investigated by a one‐pot consecutive reaction. At first, cellulose was depolymerised into glucose via a fast degradation of cellulose in molten ZnCl 2 in the presence of hydrochloric acid, and the yield of glucose is 75% in 120 s at reaction temperature of 95 °C. Then, DMSO was used as solvent and different kinds of metal chloride were added as catalysts, and the conversion was carried out continuously at 110–130 °C for 0.5–4 h. The yield of HMF was 53% when CrCl 3 were used as catalyst. The one‐pot two steps conversion was carried out at atmosphere pressure, and it is a simple route to prepare HMF from lignocellulosic feedstock on a large scale.
研究领域:
生物化学
·
可再生资源与能源
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2947-2958
·
IF 2.8
Guan Pingping,Li Haobo,Zhang Xin,Shi Zhongning,Liu Aimin
Zinc is a commonly used corrosion-resistant coating for steel surface protection. In this study, the ethylene carbonate-zinc chloride (EC-ZnCl 2 ) electrolyte systems are selected for zinc electrodeposition, and their ionic structure and properties were studied. The corrosion resistance of the electrodeposited zinc coatings obtained from 4EC-ZnCl 2 , 3EC-ZnCl 2 , and 2EC-ZnCl 2 systems was analyzed. Raman spectroscopic analysis shows that these EC-ZnCl 2 systems contain [Zn 2 Cl 6 ] 2− species. The relationship between conductivity, viscosity, and density with the temperature of EC-ZnCl 2 systems was provided. Scanning electron microscopy (SEM) and potentiodynamic polarization curve (Tafel) tests showed that when the deposition was carried out at –1.0 V and –1.2 V (vs. Ag/AgCl) for two hours, a uniform zinc coating with good corrosion resistance could be obtained.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 25
·14400-14406
·
IF 3.049
Rong-xiang Zhao,Xiu-ping Li,Chun-feng Mao,Liangpei Hou,Xiaohan Gao
N,N-Dimethylformamide hydrochloric acid/XMCln ([HDMF]Cl/XMCln, M = Zn or Fe, n = 2 or 3) was synthesized by stirring the mixture of [HDMF]Cl and metal chloride. [HDMF]Cl-based DES was characterized by FT-IR spectroscopy, ESI-MS and 1H-NMR spectroscopy. The oxidative desulfurization activity was investigated using [HDMF]Cl/0.2FeCl3 and [HDMF]Cl/ZnCl2 as the extractant and catalyst, and hydrogen peroxide (H2O2) as the oxidant. The desulfurization rate can reach up to 98.08% and 99.2% for DBT using [HDMF]Cl/0.2FeCl3 and [HDMF]Cl/ZnCl2, respectively. After recycling for 7 times, the removal rate of DBT still can reach more than 97%.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Gaoxu Han,Jianbo Jia,Quanrun Liu,Guangxu Huang,Baolin Xing,Chuanxiang Zhang,Yijun Cao
A series of coal-based hierarchical porous carbons with adjustable pores were successfully prepared with the assistance of the soluble salt Zinc chloride (ZnCl 2 ). During the carbonization process , ZnCl 2 , with a low melting point (238 °C), “in situ occupied” and “occupied” within the coal solids to generate interconnected pores, which acted as a template. Simultaneously, the activation of ZnCl 2 reduced the oxygen content of products and further improves their electrical conductivity . Optimization of the mass of the salt and the carbonization temperature resulted in targeted product with a suitable specific surface area (1581 m 2 g −1 ) and unique pores (V meso /V total = 45%), which exhibited a high specific capacitance (470.7 F g −1 at 0.5 A g −1 ) in 6 M KOH electrolyte. The symmetrical supercapacitor of targeted product has favorable rate performance (256.7 F g −1 at 0.5 A g −1 , 84.8% capacity retention at 30 A g −1 ) and excellent cycling performance (after 10000 cycles, the specific capacitance increases to 115% of the initial capacity at 10 A g −1 ). In the EMIMBF 4 electrolyte system, the energy density is 95.31 Wh kg −1 at 213.13 W kg −1 . Therefore, this work provides an effective method to improve the green and efficient use of coal.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Changhui Jing,Yihao Peng,Xin Wang,Fengyuan Zhang,Songqi Ma
This work disclosed a novel latent accelerator and the first recyclable one-component epoxy resin. One-component epoxy resins with latent curing systems overcome the short pot life of conventional two-component epoxies; however, balancing storage stability and rapid curing remains challenging, and recyclability is still unmet. Here, we report a dynamic cross-linked latent accelerator (HMZ), synthesized via trimeric hexamethylene diisocyanate, imidazole (IM), and ZnCl2 and incorporated into a bisphenol A epoxy/methyl hexahydrophthalic anhydride (MHHPA) system to enable recyclable one-component epoxy resins. The dynamic cross-linked network through an imidazole–urea bond and Zn2+ coordination effectively fixed IM, suppressing ambient reactivity and ensuring >90 days of storage stability for the one-component epoxy system─markedly outperforming the IM system. Rapid curing at 120 °C (84% conversion within 45 min) was also realized due to the dissociation of the dynamic bonds and release of highly active imidazole. Critically, the cured epoxy/MHHPA/HMZ system can be degraded under mild conditions (50 °C, NaOH/acetone/H2O), and the recovered products serve as curing agents and accelerators in new epoxy formulations, enabling recycling and reusing. This work presents a simple and effective design for latent accelerators that simultaneously achieves high latency, fast curing, and full recyclability─advancing both epoxy technology and sustainable materials science for applications in coatings, adhesives, electronics, etc.
研究领域:
材料科学
·
高分子化学
·
可持续化学
·
胶粘剂技术
·
涂料工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 8
·1-11
·
IF 2.8
Li Jie,Wu Pengfei,Li Liang,Cheng Qiannan,Wang Luoxin,Wang Hua,Tang Qingquan
Polyphenylene sulfide (PPS) is a commonly utilized engineering polymer that produces significant waste annually. However, comprehensive studies on its recycling and repurposing remain somewhat scarce. Herein, the waste PPS is calcinated by a “controlled carbonization” strategy based on ZnCl 2 catalyst to produce hierarchically porous carbons, showing potential in generating freshwater depending on solar-thermal-vapor conversion. The two-step carbonization process was optimized, and the optimal carbonization temperatures were found to be 400 ℃ and 750 ℃, respectively. The resultant hierarchically porous carbons were utilized to prepare solar steam evaporators, showing a high evaporation rate of 1.68 kg/m 2 /h with the energy conversion efficiency of 92.16% under 1 sun irradiation. The research offers a facile strategy for converting low-cost waste PPS into valuable hierarchically porous carbons, meanwhile, it provides a feasible solution for using them to produce freshwater through solar energy.
研究领域:
材料科学
·
环境工程
·
能量转换
·
高分子回收
·
太阳能利用
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）