JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Xiaoling Qu,Guangyuan Zhou,Rui Wang,Haiyan Zhang,Zhipeng Wang,Min Jiang,Jun Tang
In pursuit of poly(ethylene 2,5-furandicarboxylate) PEF materials with high molecular weight, satisfactory appearance and faster crystallization rate, its preparation from dimethyl furan-2,5-dicarboxylate (DMFD) with ethylene glycol (EG) in the trace presence of metal zinc was performed via transesterification method. Optimization of the main polymerization parameters enabled Zn-catalyzed PEF to gain high molecular weight ( M n , 5.40 × 10 4 g mol −1 ) and low content of diethylene glycol furandicarboxylate unit (DEGF, 2.91%). On the basis of experimental phenomena and high performance liquid chromatography (HPLC), the actual catalytic active species of metal zinc in the polymerization was speculated to be a salt of 2, 5-furandicarboxylate derivative (Zn(II)). The in-stiu catalyst can efficaciously inhibit the influence of by-product FDCA on the color of PEF, which displayed quite better appearance (close to white). Differential Scanning Calorimetry (DSC) showed that the in-stiu catalytic system acted as nucleating agent (NA) and the crystallization half-time (t 1/2 ) of PEFs-Zn was only 1/4 of that of PEF-tin. Additionally, series of high molecular weight furan-based polyesters from DMFD and diols with different methylene (3, 5, 6 and 8) were obtained by zinc powder as in-stiu catalyst, which further evidenced it to be efficiency and universality.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2015
·
IF 2.133
Yunsheng Liu,Dajiang Mei,Jingli Xu,Yuandong Wu
New alkali metal zinc selenites, A 2 Zn 3 (SeO 3 ) 4 · X H 2 O (A=Li, Na, K; X =2 or 0) were prepared through hydrothermal reactions . Li 2 Zn 3 (SeO 3 ) 4 ·2H 2 O ( 1 ) crystallizes in the monoclinic space group P 2 1 / c with lattice parameters a =8.123(4), b =9.139(4), c =7.938(3) Å, β =112.838(9)°. Na 2 Zn 3 (SeO 3 ) 4 ·2H 2 O ( 2 ) crystallizes in the monoclinic space group C2/c with lattice parameters a =15.7940(18), b =6.5744(8), c =14.6787(17) Å, β =107.396(3)°. K 2 Zn 3 (SeO 3 ) 4 ( 3 ) crystallizes in the monoclinic space group C2/c with lattice parameters a =11.3584(12), b =8.6091(9), c =13.6816(14) Å, β =93.456(2)°. The anionic structures are composed of [Zn 3 O 12 ] 18− sheets, chains, and “isolated” units in compound 1, 2, 3, respectively, and trigonal pyramids SeO 3 2− . The compounds were characterized by the solid state UV–vis–NIR diffuse reflectance spectroscopy , infrared spectra and thermogravimetric analysis .
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Lei Dai,Tingting Wang,Boxuan Jin,Na Liu,Yifei Niu,Wenhao Meng,Ziming Gao,Xianwen Wu,Ling Wang,Zhangxing He
Zinc is a widely used anode material for zinc-ion batteries. However, the problems of dendrites and side reactions faced by the metal zinc anode limit its cycle stability and service life. Surface modification is a simple and effective strategy for preparing high-performance anodes. Here, we used a simple method to coat the γ-Al 2 O 3 on surface of metal zinc as an artificial protective layer for the anode/electrolyte. γ-Al 2 O 3 coating can guide the uniform deposition of zinc ions . The coating has good hydrophilicity, which is conducive to accelerate ion transmission. In addition, the importance of controlling the thickness of protective layer on surface of zinc metal anode to obtain good electrochemical performance is emphasized. The appropriate thickness of Al 2 O 3 coating ensures the rapid migration of zinc ions and improves the uniformity of zinc plating/stripping, which is conducive to more uniform zinc nucleation and high-quality deposition. Therefore, the discharge capacity of Zn@Al 2 O 3 -15 full cell at a current density of 0.3 A g −1 is 174.3 mAh g −1 , which is much higher than that of bare zinc cell (71.8 mAh g −1 ). This work has certain reference significance for the development of anode coating strategies in zinc-ion batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 8
·4366-4375
·
IF 14.511
Yu Wang,Yani Liu,Haoqiang Wang,Shuming Dou,Wei Gan,Lijie Ci,Yan Huang,Qunhui Yuan
Targeted at mitigating the inevitable dendrite growth and side reactions in zinc-ion batteries (ZIB), herein, a multifunctional protective strategy of Zn anode coating using zinc benzene tricarboxylate (Zn–BTC) is proposed in the Zn symmetric cell and MnO2//Zn full cell. The rationally selected pores of Zn–BTC served as ionic sieves, accelerating the transport of Zn2+ while blocking the entrance of the electrolyte anions. The structural grids of Zn–BTC hindered the two-dimensional diffusion of Zn2+ and regulated the electric field at the anode, resulting in a uniform flux of Zn2+ and subsequently stable stripping/plating. The Zn–BTC layer also worked as an artificial solid/electrolyte interphase film, expelled the solvated water molecules and restricted the side reactions. As a result, ultra-long cycling stability was achieved, with a superior lifespan of 800 h in the Zn symmetric cell and outstanding capacity retention of 81.1% after 1000 cycles in the MnO2//Zn battery at a high current density of 2 A g−1.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yukun Yuan,Jingfeng Gao,Zhiqi Wang,Liqin Zeng,Hongxin Xu,Xiaoyu Fu,Yifan Zhao
Zn(II) and dialkyldimethyl ammonium compounds (DADMAC) are common heavy metal and disinfectant contaminants in wastewater treatment plants. The response of sulfur autotrophic denitrification (SAD) system under single and joint stress with different concentrations of Zn(II) (1–25 mg/L) and DADMAC (0.2–10 mg/L) was evaluated using sequencing batch fixed-bed biofilm reactors in this study. The joint stress of high concentrations of Zn(II) and DADMAC had stronger inhibitory effects on microbial activity and metabolic function genes compared to the single stress, thus significantly inhibiting the performance of the SAD system. Furthermore, Zn(II) stress contributed to the proliferation of resistance genes (RGs) in water (w-RGs), whereas stress of DADMAC was able to induce the proliferation of intracellular RGs (si-RGs) and extracellular RGs (se-RGs) in sludge. And under the joint stress of Zn(II) and DADAMC, the abundances of si/se-RGs were much higher than that under single stress, with a higher risk of RGs transmission. The α-Helix/(β-sheet + random coil) in tightly bound extracellular polymeric substances correlated positively with si- tnpA-04 and se- tnpA-04 . Horizontal gene transfer via mobile genetic elements was the main mode of RGs transmission. This work assessed the risk of DADAMC and Zn(II) in the SAD system and established new insights into the transmission of three-fraction RGs under DADMAC and Zn(II) stress.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 35
·e202402622
·
IF 1.9
Wanchang Li,Shuo Wang,Yifei Huang,Limao Fan,Lei Zhang,Kai Huang
Graphical By ingeniously integrating Zn–Al layered double hydroxide with polyaniline, a series of nitrogen-doped carbon catalysts with excellent performance were prepared via in situ polymerization. Diverse cyclic carbonates were synthesized from the corresponding epoxides via the insertion of CO 2 into the β-C─O bond. The design and synthesis of efficient carbon-based materials incorporating multifunctional sites is prospective technology for converting carbon dioxide (CO 2 ) into high-value chemicals. Here, nitrogen-doped carbon catalysts (ZnAl-NC) with bimetal zinc–aluminum sites were synthesized using nitrogen-rich polyaniline (PANI) and ZnAl-LDH through hydrothermal and in situ pyrolysis methods. ZnAl-NC-400, in the presence of tetrabutylammonium bromide (TBAB), exhibited excellent catalytic activity without solvent, achieving high yields (97.2% or 98.5%) in the cycloaddition of CO 2 with propylene oxide (PO) under traditional or mild conditions. NH 3 -TPD and CO 2 -TPD results indicated that the enhanced catalytic activity resulted from the acid–base synergistic effect, involving Lewis acid sites from Zn and Al species and abundant Lewis base sites from the PANI matrix. The impact of calcination temperature on catalyst morphology, structure, and performance was investigated, along with catalyst recycling and adaptability to various epoxides. This work presents an efficient catalyst for CO 2 conversion and suggests new approaches for designing catalytic sites in carbon-based catalysts for CO 2 capture and utilization.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Xiongri Gan,Chenran Zhang,Xiushen Ye,Long Qie,Kaiyuan Shi
Zinc-ion hybrid capacitors (ZICs) that combine the characteristics of metal-ion batteries and supercapacitors are emerging to fulfill high energy-power demands. The objective of this study is to address the challenges in the practical implementation of metallic zinc for ZICs. In this work, we explore redox molecules based on anthraquinone compounds as electrolyte additives for the interfacial engineering of Zn anodes. The results reveal that the additives enable favorable solvation of Zn 2+ through metal ion-ligand coordination. The redox additives improve the lifespan of Zn//Zn cells from 50 to 1600 cycles at 2 mA cm −2 and 1 mAh cm −2 due to the suppression of parasitic reactions and the mitigation of by-product formations. The redox properties of additives strengthen the pseudocapacitive behavior of the ZICs, enabling efficient interfacial charge and mass transfer. The redox-enhanced device manifests an increased capacity of 195.0 mAh g − 1 with improved cycling stability, compared to that of 149.6 mAh g − 1 for the additive-free electrolyte. The universal strategy, based on the synergistic effects of redox additives, is demonstrated by a collection of molecules with similar structures. This work unveils a conceptually new approach that utilizes redox additives to formulate advanced electrolytes for aqueous energy storage.
研究领域:
电化学
·
能源存储
·
材料科学
✓ 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）