JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 135
·期 10
·45940
·
IF 1.86
Mei Wang,Jianchun Jiang,Jianling Xia,Shouhai Li,Mei Li
Phosphate ester groups containing ricinoleic acid-based Ca/Zn (LPPRA-Ca and LPPRA-Zn) stabilizer was successfully synthesized from ricinoleic acid (RA) and used as thermal stabilizers for poly(vinyl chloride) (PVC). These thermal stabilizers were characterized by Fourier transform infrared spectrometry, 1 H nuclear magnetic resonance, and inductively-coupled plasma atomic emission spectroscopy. The effects of LPPRA-Ca/LPPRA-Zn, CaSt 2 /ZnSt 2 , and other stabilizers on the thermal stability of PVC were studied through Congo Red test, discoloration tests, thermogravimetric analysis (TGA), TGA–infrared, and TGA–mass spectrometry. The thermal stability tests show that LPPRA-Ca/LPPRA-Zn displays the best initial color stability and long-term thermal stability for PVC. The superior performance is attributed to the synergistic effect of LPPRA-Ca and LPPRA-Zn. Moreover, a lower Zinc content of LPPRA-Zn in PVC helps to decrease the “zipper dehydrochlorination” of the product, which contributes to a better initial thermal stability. Except for the better stabilization performance, LPPRA-Ca/LPPRA-Zn also displays better plasticization performance for PVC compared with other stabilizers. A possible stabilizing mechanism of PVC/LPPRA-Ca/LPPRA-Zn system was presented. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45940.
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高影响因子
Acta Biomaterialia
·
2024
·
IF 9.4
Guangli Xiang,Bingjie Wang,Wenshang Zhang,Yu Dong,Jiaojiao Tao,Aijia Zhang,Rui Chen,Tianze Jiang,Xia Zhao
Diabetic wound healing is a great clinical challenge due to the microenvironment of hyperglycemia and high pH value, bacterial infection and persistent inflammation. Here, we develop a cascade nanoreactor hydrogel (Arg@Zn-MOF-GOx Gel, AZG-Gel) with arginine (Arg) loaded Zinc metal organic framework (Zn-MOF) and glucose oxidase (GOx) based on chondroitin sulfate (CS) and Pluronic (F127) to accelerate diabetic infected wound healing. GOx in AZG-Gel was triggered by hyperglycemic environment to reduce local glucose and pH, and simultaneously produced hydrogen peroxide (H 2 O 2 ) to enable Arg to release nitric oxide (NO) for inflammation regulation, providing a suitable microenvironment for wound healing. Zinc ions (Zn 2+ ) released from acid-responsive Zn-MOF significantly inhibited the proliferation and biofilm formation of S.aureus and E.coli . AZG-Gel significantly accelerated diabetic infected wound healing by down-regulating pro-inflammatory tumor necrosis factor (TNF)-α and interleukin (IL)-6, up-regulating anti-inflammatory factor IL-4, promoting angiogenesis and collagen deposition in vivo . Collectively, our nanoreactor cascade strategy combining “endogenous improvement (reducing glucose and pH)” with “exogenous resistance (anti-bacterial and anti-inflammatory)” provides a new idea for promoting diabetic infected wound healing by addressing both symptoms and root causes. Statement of Significance A cascade nanoreactor (AZG-Gel) is constructed to solve three key problems in diabetic wound healing, namely, hyperglycemia and high pH microenvironment, bacterial infection and persistent inflammation. Local glucose and pH levels are reduced by GOx to provide a suitable microenvironment for wound healing. The release of Zn 2+ significantly inhibits bacterial proliferation and biofilm formation, and NO reduces wound inflammation and promotes angiogenesis. The pH change when AZG-Gel is applied to wounds is expected to enable the visualization of wound healing to guide the treatment of diabetic wound. Our strategy of “endogenous improvement (reducing glucose and pH)” combined with “exogenous resistance (anti-bacterial and anti-inflammatory)” provides a new way for promoting diabetic wound healing.
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高影响因子
NEW CARBON MATERIALS
·
2024
·
IF 6.5
Ya-ping Lu,Hong-xing Wang,Lan-tao Liu,Wei-wei Pang,Xiao-hong Chen
In recent years, zinc-ion hybrid capacitors (ZIHCs) have attracted increasing attention due to their environmental friendliness and excellent electrochemical properties. However, their performance is mainly limited by the electrochemical performance of the cathode, so it is necessary to develop an advanced cathode material. N, B co-doped sodium alginate-based porous carbon (NBSPC) was prepared by one-step co-carbonization using sodium alginate as the matrix and NH 4 B 5 O 8 as the N and B source. This N, B co-doping strategy improves the pore structure of the carbon materials and increases the number of surface functional groups, greatly improving the capacitive behavior of the raw materials and thus improving their electrochemical performance. When used as the cathode in ZIHCs, the NBSPC had an excellent rate performance (85.4 mAh g −1 even at ultra-high current density of 40 A g −1 ) and good cycling stability (15 000 cycles at 20 A g −1 with a capacity retention rate of 94.5%).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Kang Zhao,Jinhu Sheng,Nairui Luo,Junwei Ding,Hewei Luo,Xiaodong Jia,Shiwen Wang,Shaoming Fang
Rechargeable aqueous Zn batteries have the edge in resource reserve, cost, energy and conversion efficiency due to the inherent features of metal Zn anodes. However, the application of Zn-based batteries is being seriously hindered by Zn dendrites and water-induced side-reactions. Here, potassium polyacrylate (K-PAM) is proposed as the electrolyte additive to form a synergistic cation–anion interface on Zn surface. The carboxyl anions and K + cations are preferentially adsorbed on the Zn surface due to the intrinsic surfactant characteristics, which could homogenize Zn plating and suppress parasitic reactions. The synergistic regulation of K-PAM additive endows the Zn Zn symmetric cells with excellent cyclic durability of 1250 h at 1 mA cm −2 , which is significantly better than the polyacrylic acid additive only with carboxyl anions. Moreover, trace K-PAM addition into traditional ZnSO 4 electrolyte endows the Zn Cu batteries with a considerable average Coulombic efficiency of 99.2 %. Additionally, higher capacity retention and excellent cycling stability of Zn VO 2 cells further mark K-PAM as a potentially impressive aqueous electrolyte additive for high-performance Zn-based batteries. This work will provide a promising method for the synergistic regulation with cations and anions of electrolyte additives to improve the stability and reversibility of Zn anodes.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shuofeng Li,Fangfang Wang,Chenhuan Wang,Lin Hao,Ningzhao Shang,Pengbo Zhang,Yawen Zhang,Nuo Xiao,Yaai Kang,Jin Liu,Shutao Gao,Chun Wang,Zhi Wang,Qiuhua Wu
Single-atom nanozyme (SAZ) with peroxidase-like activity has attracted great attention in point-of-care (POC) diagnostic, but the use of unstable H 2 O 2 in peroxidase catalytic reactions often leads to low detection accuracy. Thus, developing SAZ with high oxidase (OD)-like activity to construct RNA sensing systems independent of H 2 O 2 is imperative for improving accuracy. Herein, a novel strategy to fabricate boron-nitrogen co-doped zinc SAZ (ZnBNC-SAZ) with excellent OD-like activity by carbonizing Zn based zeolitic boron imidazolate frameworks is reported. The electron deficient B in imidazolate ligand can form Zn─N─B bond in situ during high temperature pyrolysis, which can regulate the electronic structure of Zn and further upshift the d-band center of Zn to improve the OD-like activity. With ZnBNC-SAZ as signal generator, a new method for sensitive RNA detection is developed by combining CRISPR/ cas13 system with terminal deoxynucleotidyl transferase-induced DNA extension reaction. The limits of detection for RNAs are as low as 20 aM. The proposed biosensor is adaptable to a lateral-flow-based readout and is universally applicable for sensing various RNAs by programming the guide RNA. Importantly, the proposed biosensor can monitor the cellular differentiation and identify patients with cervical carcinoma, showing great potential for application in facile POC diagnosis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yukun Liu,Xinshuang Lin,Bing Li,Hanwen He,Hangyuan Xing,Yuqing Zhang,Yang Song,Sen Zhang,Chao Deng
The delicate design and fabrication of transition metal-based heterostructures with abundant active sites are a crucial issue for achieving superior electrocatalytic properties. In this work, we introduce a novel bio-assisted strategy for assembling cobalt-based heterostructures on nitrogen and phosphorus codoped carbon nanobelts, which serve as highly efficient bifunctional oxygen catalysts. The fungus of Rhizopus is utilized to encapsulate the Co-CoTe within the in-situ formed nitrogen and phosphorus codoped carbon nanotubes (NPCNT), resulting in hairy nanobelts with a porous structure and excellent flexibility. Both experimental and theoretical analyses results reveal the superior geometric configuration, electronic structure, and the low energy barrier of the bio-Co-CoTe@NPCNT nanobelts. Benefitting from these advantages, the bio-Co-CoTe@NPCNT nanobelts demonstrate rapid kinetics, impressive catalytic performance, and high durability in both oxygen evolution and reduction (OER/ORR) reactions. The aqueous zinc-air batteries (ZAB) employing the prepared bio-Co-CoTe@NPCNT nanobelt cathode exhibit the stable cycling properties and good reliability. Furthermore, the solid-state ZAB demonstrates high reliability, pliability, and durability under various deformations.
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高影响因子
Biochar
·
2024
·Vol. 6
·期 1
·1-14
·
IF 13.1
Chen Shanshuai,Tian Liu,Feng Xiaoqiang,Bao Huanyu,Wang Hongliang
Chitin and phytic acid are abundant sustainable resources commonly found in shrimp shells, crab shells, and various plants. However, they are underutilized, and their biomass value is frequently underestimated. To address this, the current study developed a strategy to synthesize efficient separator coatings for zinc-iodine (Zn-I) batteries using chitin and phytic acid as carbon sources (biochar). First, nanosheets of porous carbon doped with N and P (NP-PC), featuring multiple active sites, are synthesized through in situ carbonization of chitin and phytic acid. Subsequently, the synthesized materials are coated onto the surfaces of glass fiber (GF) separators, effectively addressing several persistent challenges associated with Zn-I batteries. Notably, the modified separator (NP-PC@GF) enhanced the rapid-discharge capability of the involved battery, effectively inhibited the diffusion of intermediate polyiodide species, stabilized the electrolyte interface, suppressed irreversible dendrite formation, and increased I utilization efficiency. Consequently, the battery demonstrated high electrochemical performance, with an initial capacity of 7.8 mAh cm –2 at 20 mA cm –2 , an initial specific capacity of 8.9 mAh cm –2 under high I loading, and a retention rate of 56% (5.1 mAh cm –2 ) at the 174th cycle. Overall, this research demonstrates the effective use of biochar for separator modification, facilitating the development of high-performance Zn-I batteries. Graphical
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JOURNAL OF POWER SOURCES
·
2012
·
IF 4.951
Jing Yang,Ligang Feng,Fengzhan Si,Yuwei Zhang,Changpeng Liu,Wei Xing,Kunqi Wang
H 2 -mesoporphyrin IX and Zn-mesoporphyrin IX have been investigated as sensitizers for the titanium dioxide (TiO 2 ) film electrode to construct a new two-compartment photoelectrochemical biofuel cell (PEBFC). The PEBFC can convert the light and chemical energy to electricity by consuming photons and oxidizing glucose. The two sensitizers are similar with two carboxyl anchoring groups, except that the central hydrogen atoms in the H 2 -mesoporphyrin IX are replaced by zinc. To determine how cell performance is affected by the sensitizer, we analyze the photochemical and photoelectrochemical properties of the two sensitizers by physical characterization and photoelectrochemical experiments. The UV–Vis absorption spectra and X-ray photoelectron spectra (XPS) indicate that the interactions between the sensitizer and TiO 2 decrease in the order of H 2 -mesoporphyrin IX > Zn-mesoporphyrin IX. The interactions are also determined by Fourier transform infrared (FTIR) spectra which indicate that the two sensitizers are adsorbed on the TiO 2 film through the carboxyl groups. The photovoltaic characteristics show the Zn-mesoporphyrin IX is less effective in comparison with the H 2 -mesoporphyrin IX, since the Zn-mesoporphyrin IX enhances the back electron-transfer process, producing lower IPCE and current. These results reveal that the H 2 -mesoporphyrin IX is a more efficient sensitizer compared with the Zn-mesoporphyrin IX for the PEBFC.
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高影响因子
Analytical Methods
·
2024
·
IF 2.7
Lu Zhang,Kun Wang,Feng Zhou,Yuwei Bu,Xiaoyan Yang,Guangming Nie
A sensitive photoelectrochemical (PEC) biosensor for silver ions (Ag+) was developed based on Zn-Co doped C and CdS quantum dots (CdS QDs) nanomaterials. Hydrophobic modified sodium alginate (HMA), which could stabilize and improve the PEC performance of CdS QDs, was also used for the construction of PEC sensors. Specially, Zn-Co doped C, CdS QDs and HMA were sequentially modified onto the electrode surface via the drop-coated method, and the C base rich DNA strand was then immobilized onto the modified electrode. As the C base in DNA specifically recognized Ag+, it formed the C-Ag+-C complex in the presence of Ag+, which created a spatial steric hindrance, resulting in a reduced PEC response. The sensing platform is sensitive to Ag+ in the range of 10.0 fM to 0.10 µM, with a limit of detection of 3.99 fM. This work offers an ideal platform to determine trace heavy metal ions in environmental monitoring and bioanalysis.
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高影响因子
RARE METALS
·
2024
·
IF 9.6
Wang Wei-Wei,Huang Rui,Tao Yu,He Peng,Tuo Su-Xing,Bian Yu-Jian,Hu Rui-Ting,Yan Jun,Liang Yan-Jie,Zhang Wen-Chao
The electrochemical utilization of Zn anodes in aqueous batteries is hampered by the intricate and interconnected issues of Zn dendrite growth, H 2 evolution and Zn corrosion reactions. In this study, a multifunctional protective layer comprising MXene and graphitic carbon nitride (g-C 3 N 4 ) was constructed using a self-assembly strategy. The MXene/g-C 3 N 4 protective layer exhibited robust zincophilic characteristics, which facilitated a uniform distribution of the electric field and ensured a sufficient influx of Zn 2+ . This reduces the Zn 2+ nucleation barrier and prevents dendrite growth. In addition, the hydrophobic nature of the protective layer, coupled with its negative charge, can repel SO 4 2− and select water molecules from the electrolyte, which aids in mitigating corrosion and H 2 evolution. The symmetric Zn cell coated with the MXene/g-C 3 N 4 protective layer showed remarkable stability, achieving over 2000 h of reversible cycling at 1 mA·cm −2 . Furthermore, the MXene/g-C 3 N 4 -coated Zn anode paired with a sodium-doped V 2 O 5 cathode (NVO) exhibited enhanced cycling capability over 1500 cycles. Graphical Abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Wei Wang,Yilong Hua,Shaolin Li,Weile Yan,Wei-xian Zhang
A common concern in the approval of nanotechnology for water treatment is whether there are advantages of these nanomaterials over conventional water treatment reagents. In this work, nanoscale zero-valent iron (nZVI) is compared with lime (Ca(OH) 2 ), the most widely used heavy metal precipitant, for Pb(II) and Zn(II) removal, in laboratory and field experiments. Water chemistry, treatment efficiencies and reaction products of the two reagents are compared and the study shows that the moderate solution pH of nZVI and its seed effect play vital roles in producing high-quality effluents. The results are then verified in a field continuous-flow experiment using tons of lime and kilos of nZVI. The results show that sub-ppm levels (∼0.1 mg/L) of Pb(II) and Zn(II) could not be achieved via lime precipitation alone, due to the solubility limits of metal hydroxides and their re-dissolution caused by the strong alkalinity of lime. In comparison, stable and lower levels of Pb(II) and Zn(II) were easily attained using nZVI, due to its multifunctional properties and good tolerance for influent fluctuation enabled by its inherent pH-stabilizing nature. SEM characterizations, particle size analyses and quiescent settling experiments show the ability of nZVI to generate large and consolidated solids that are amenable to gravitational separation. The study shows several key advantages of nZVI over lime technology in Pb(II) and Zn(II) removal. As lime is widely used for heavy metal removal, this work provides an effective advanced treatment process to supplement lime-based treatment methods.
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JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xuehua Ruan,Xinfang Zhang,Xuhang Liao,Xiaobin Jiang,Yan Dai,Xiaoming Yan,Gaohong He
Zeolitic imidazolate framework-8 (ZIF-8) with regular pore size (~ 0.34 nm) is widely attempted for gas separation membranes based on size sieving. However, the prospect is subjected to fabricating the continuous ZIF-8 membranes with high mechanical stability and uniformity. In response, an adhesive layer of Zn(II)-doped polydopamine (Zn-PDA) is pre-coated on the stainless steel nets in this work to improve ZIF-8 nucleation and growth. Zn-PDA layer shows high tolerance to ultrasonic agitation and heated methanol (system for ZIF-8 synthesis), little dissolution within 24 h, which supplies a high stable surface for ZIF-8 growth. Furthermore, the Zn(II) doped in PDA layer is opportunely serving as the even-distributed ZIF-8 nucleation starting sites, verified with the EDX and FE-SEM images for the aggregated Zn(II) clusters and the nascent ZIF-8 crystals. Therefore, an indented and hinged boundary is constructed between ZIF-8 and substrate to enhance the mechanical stability. The FE-SEM images after ultrasonic agitation show that the continuous ZIF-8 membranes prepared on Zn-PDA layers can tolerate the deformation to a certain extent. Finally, the prepared ZIF-8 membranes behave excellently with α H2/CO2 = 9.9, α H2/CO = 17.2, α H2/CH4 = 26.0, and permeation rate J H2 = 3980 GPU. This work supplied a useful approach to enhance mechanical stability and uniformity of defect-free ZIF-8 membranes.
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高影响因子
危险品化学品经营许可证（带存储）