JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Zhiwei Zhang,Hanning Li,Jie Hu,Baozhong Liu,Qingrui Zhang,Carlos Fernandez,Qiuming Peng
A novel nitrogen-doped biomass carbon/silver (C-N/Ag) composite has been synthesized by a simple method, wherein the precursor of soymilk simultaneously serves as carbon and nitrogen sources, reductant and substrate. The structure, morphology and valence state of samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectra. Results show the formation of nano-sized Ag homogenously disperses on the surface of mesoporous substrate, and the self-reduction role mainly attributes to the presence of unsaturated carbon bonding. Electrochemical properties were characterized by galvanostatic discharge and impedance spectra techniques. The sample prepared with 1 mmol AgNO 3 solution, activated by 0.1 M KOH and annealed at 900 °C shows excellent oxygen reduction reaction activity and good electrochemical durability in alkaline medium. The onset potential, limiting diffusion current density and electron transfer number are 0.93 V, 6.26 mA cm −2 and 4.00, respectively, superior to those of 60 wt.% Ag/C and comparable to 20 wt.% Pt/C catalysts correspondingly. The discharge performance of Zn-air batteries is better than that of 20 wt% Pt/C.
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COMPOSITES SCIENCE AND TECHNOLOGY
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2016
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IF 3.897
Yu Zhao,Nana Li,Shengji Xia
Zn–Al layered double hydroxides (LDH) modified polyamide (PA) nanofiltration (NF) membranes were successfully fabricated by interfacial polymerization of 1,3-Phenylene diamine (MPD) and 1,3,5-Benzenetricarbonyl trichloride (TMC) monomers . Compared to raw PA membranes, the LDH incorporated membranes showed denser PA layers with more leaf-like folds, rather than ridges and valleys, according to images from field emission scanning electron microscopy (FESEM) and atomic force microscope (AFM). Higher hydrophilicity (with the contact angle decreased from 70.33° to 55.66°) and water permeability (with pure water flux enhanced from 6.76 to 9.48 L/m 2 h, measuring approximately 40.2% improvement) were achieved by PA membranes embedded with Zn–Al LDH nanoparticles . The rejection ability of different membranes was evaluated using Aldrich-humic acid (HA) and water from the Huangpu River; the results indicated that PA/LDH membranes exhibited a higher removal efficiency of natural organic matter (NOM). Excitation–emission matrix (EEM) fluorescence spectroscopy was also used in analysing raw natural water and permeate to investigate the removal mechanism toward different types of organic matters; better antifouling properties were observed for modified PA membranes.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2016
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IF 2.357
Lindong Li,Xingliang Chen,Shuhua Qi
The composite of hollow glass microspheres (HMG) coated by Ni 0.7 Zn 0.3 Fe 2 O 4 particles was fabricated via sol–gel method, and then the ternary composite (HMG/Ni 0.7 Zn 0.3 Fe 2 O 4 /PT) was synthesized by in situ polymerization. The electrical property, magnetic performance and reflection loss of the composites were measured, and the results suggest that the conductivity and the saturation magnetization (Ms) of HMG/Ni 0.7 Zn 0.3 Fe 2 O 4 /PT reach 6.87×10 −5 S/cm and 11.627 emu/g, respectively. The ternary composite has good microwave absorbing properties ( R min =−13.79 dB at 10.51 GHz) and the bandwidth less than −10 dB can reach 2.6 GHz (from 9.4 to 12.0 GHz) in X band (8.2–12.4 GHz). The morphology and chemical structure of the samples were measured through scanning electron microscopy (SEM), X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). This paper also analyzes the relationship between the reflection loss of the absorber and its thickness.
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Journal of Materials Chemistry C
·
2015
·Vol. 4
·期 3
·581-588
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IF 4.696
Sheng Cao,Wenyu Ji,Jialong Zhao,Weiyou Yang,Chengming Li,Jinju Zheng
Recently, Cu-doped ternary chalcogenide quantum dots (QDs) have attracted extensive attention due to their large Stokes shift and tunable photoluminescence (PL) behavior in the visible and near-infrared (NIR) spectral range, and particularly for their remarkably lower toxicity than their Cd-based counterparts. However, there still remain material- and fabrication-related obstacles in realizing high-performance Cu-doped QDs, which limit their promising applications in light-emitting devices and bio-labeling. In the present study, we report the facile synthesis of high-qualified Cu-doped Zn–In–Se QDs via a hot injection approach, using a heterogeneous dispersion of Se in octadecene (ODE) as a “green” Se precursor. With variation of the ratios of Zn to In, the obtained Cu-doped Zn–In–Se QDs exhibited composition-tunable PL emissions over the most visible spectral window (ca. 565–710 nm) with a PL quantum yield (QY) up to 38% after coating ZnSe shells, which is the highest one ever reported in this system. Furthermore, we report, for the first time, the exploration of QD light-emitting diodes (QD-LEDs) based on the Cu-doped Zn–In–Se QDs as the active layer, which had a maximum luminance of 320 cd m−2 and a luminous efficiency (LE) of 0.97 cd A−1 (at 98 cd m−2), suggesting their promising potential for application in optoelectronic devices.
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ACS Applied Nano Materials
·
2024
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IF 5.3
Xuemei Pi,Yuanyuan Wang,Xianwen Kan
The intensive application of organophosphorus pesticides (OPs) and their acute toxicity have raised significant threats to human health. Herein, an electrochemiluminescence (ECL) nanomaterial was synthesized by successive modification of the Zn–N structure and Prussian blue (PB) nanoparticles on cerium(III) tetrakis(4-carboxyphenyl)porphine (CeTCPP). Because of the combination of CeTCPP (luminophore) and the Zn–N structure (coreaction accelerator) in one nanostructure, Zn-CeTCPP exhibited a high ECL response based on the self-enhancement strategy. The ECL signal was remarkably quenched in turn due to the resonance energy transfer (RET) from Zn-CeTCPP to PB. However, PB was disassembled in the presence of acetylcholinesterase and acetylthiocholine since the produced acetic acid and thiocholine destroyed PB and reduced PB to Prussian white, respectively. Therefore, the recovered ECL signal was employed to sensitively detect malathion with a wide linear range of 1.0 × 10–13–1.0 × 10–7 g/mL and a low limit of detection of 13 fg/mL, endowing the present ECL-RET sensor with excellent prospects for practical application based on the self-enhancement and acceptor disassembly strategies.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Zhao Jun,Liu Bonan,Xiong Lunqiao,Liu Wenchao,Wang Duanda,Ma Wangjing,Jiang Litong,Yang Jianlong,Wang Ping,Xiao Tiancun,Zhao Sui,Edwards Peter P.,Tang Junwang
7 billion of 9.2 billion tons of plastic produced becomes waste while conventional catalytic plastic recycling methods are vulnerable with degraded performance and intensive energy input. Here, a hybrid Zn/b-ZnO catalyst, together with the specially-designed microwave reaction system, has achieved fast plastic waste upgrading under atmospheric pressure without using H 2 . Bifunctional ZnO acts as a microwave absorber and substrate catalyst, and in-situ formed Zn clusters promote C-C bond cleavage and nearly 100% upcycle landfilled plastic mixtures into lubricant base oil precursors and monomers. Unprecedented turnover number (250 g plastic g −1 catalyst ) of plastic depolymerisation and long-time stability over 50 successive cycles have been demonstrated, together with 8-time higher energy efficiency compared with conventional catalysis, indicating this strategy is an economical approach to efficient upcycling of plastics towards valuable products. Moreover, the catalyst can tolerate high contaminates, even the landfilled plastics can still be converted to lubricant base oil precursors, which has never been reported before.
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PubMed
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NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Yafeng Xu,Yu Li,Jian Yao,Xiang Liu,Shengbiao Zhang,Shihao Zhang,Shuqin Dong,Yue Yao,Xihong Ding,Meng Wang
Antimony sulfide (Sb2S3) is regarded as a promising candidate for next-generation photovoltaic technology. In recent years, the efficiency of Sb2S3 solar cells has shown significant improvement, however, there still exists a considerable gap from the theoretical efficiency. This is partially due to the relatively high resistivity and parasitic light absorption of the CdS buffer layer, as well as the unsatisfactory crystal orientation of Sb2S3. In this work, a Zn salt additive is added to chemical bath solution of CdS to regulate the growth of CdS film. Elemental analysis indicates that only a small amount of zinc is deposited into the CdS film. The introduction of the Zn salt additive significantly increases the grain size and electrical conductivity of CdS, while also leading to preferential growth of the [hk1] orientation in Sb2S3 film. The low-cost Sb2S3 solar cells with inexpensive carbon electrodes were fabricated. The enhanced quality of the junction, attributed to the Zn salt additive, leads to improved charge transport and suppressed charge recombination in the Sb2S3 solar cells. As a result, the efficiency increases from 4.90% to 5.74%. This work presents a straightforward and efficient approach for the fabrication of superior CdS buffer layers and Sb2S3 solar cells.
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Regenerative Biomaterials
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2024
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IF 5.6
Yang Shuaikang,Wang Weiqiang,Xu Yanan,Yuan Yonghui,Hao Shengzhi
Fe-based biodegradable materials have attracted significant attention due to their exceptional mechanical properties and favorable biocompatibility. Currently, research on Fe-based materials mainly focuses on regulating the degradation rate. However, excessive release of Fe ions during material degradation will induce the generation of reactive oxygen species (ROS), leading to oxidative stress and ferroptosis. Therefore, the control of ROS release and the improvement of biocompatibility for Fe-based materials are very important. In this study, new Fe–Zn alloys were prepared by electrodeposition with the intention of using Zn as an antioxidant to reduce oxidative damage during alloy degradation. Initially, the impact of three potential degradation ions (Fe2+, Fe3+, Zn2+) from the Fe–Zn alloy on human endothelial cell (EC) activity and migration ability was investigated. Subsequently, cell adhesion, cell activity, ROS production and DNA damage were assessed at various locations surrounding the alloy. Finally, the influence of different concentrations of Zn2+ in the medium on cell viability and ROS production was evaluated. High levels of ROS exhibited evident toxic effects on ECs and promoted DNA damage. As an antioxidant, Zn2+ effectively reduced ROS production around Fe and improved the cell viability on its surface at a concentration of 0.04 mmol/l. These findings demonstrate that Fe–Zn alloy can attenuate the ROS generated from Fe degradation thereby enhancing cytocompatibility.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2024
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IF 5.4
Lichao Zuo,Yuanyuan Bao,Ke Wu,Shujing Li,Zhaohui Qu,Yongbo Lyu,Xiaozhen Li,Hong Meng,Yifan He
The increasing prevalence of antibiotic-resistant bacteria is regarded as one of the worst threats to the environment and global health, and antimicrobial nanomaterials have been increasingly explored to provide solutions for antimicrobial resistance problems. In this paper, mesostructured Zn-doped CeO 2 hollow spheres (ZDCHS) with various Zn/Ce ratios were successfully prepared by a conventional one-pot hydrothermal synthesis method. The ingenious incorporation of Zn playing a vital role in the fabrication of hollow structure of ZDCHS with high specific surface area, and detailed transmission electron microscopy (TEM) characterization confirmed the homogeneous distribution of Zn element across the ZDCHS. The X-ray photoelectron spectroscopy (XPS) and Raman results indicated that a higher concentration of oxygen vacancies was obtained on the ZDCHS compared to the undoped CeO 2 counterparts. In addition, the in vitro antioxidant properties evaluated toward scavenging DPPH radicals, hydroxyl radicals and superoxide radicals further revealed the enhanced antioxidant activity of ZDCHS derived from the doping with Zn ions. Furthermore, the bacteriostatic assay against Gram-negative (E. coli) and Gram-positive (S. aureus) bacteria showed that the ZDCHS possessed synergistically improved bacteriostatic performance and were more susceptible to S. aureus with a maximal antimicrobial ratio of 99.5 %, which is higher than that of the undoped CeO 2 samples (80.7 %). These results represent a new paradigm to the design of novel hollow-structured materials, highlighting the doping of Zn ions in the lattice structure of CeO 2 provides a feasible means for the preparation of effective antioxidants and antimicrobial agents.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Zhe Xiao,Xiangyu Dai,Jianfang Zhu,Dongming Liu,Luzhi Liu,Xueping Liu,Yun Li,Zhengfang Qian,Renheng Wang
Aqueous zinc-ion batteries have garnered significant interest due to their inherent safety, cost-effectiveness, and high capacity. However, water molecules in the electrolyte adsorb onto the surface of the negative zinc electrode via hydrogen bonding and dissociate into H + and OH − under an electric field. This creates a local alkaline environment at the interface, promoting zinc dendrite growth, surface corrosion, and hydrogen evolution reaction. Herein, a hydrogen bond competition strategy for optimizing aqueous electrolytes based on low-cost polyhydroxyl organic additive maltitol is proposed. The addition of maltitol disrupts the hydrogen bond network of the aqueous electrolyte and reduces the activity of water molecules, replacing one of the water molecules in the solvation structure [Zn(H 2 O) 6 ] 2+ . Additionally, maltitol preferentially adsorbs on the Zn (002) surface compared to water molecules. This stable deposition of the Zn (002) crystal faces inhibits dendrite growth and hydrogen evolution. The Zn||Zn symmetric battery assembled with 0.4 m maltitol has an ultralong cycle time of 4500 h at 1 mA cm −2 , 1 mAh cm −2 . Zn||NH 4 V 4 O 10 full batteries also show better cycling performance than non-additive devices.
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JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Zhongxu Chen,Guancheng Xu,Jiahui Jiang,Qihao Wu,Shuai Liu,Yuying Feng,Yixuan Li,Li Zhang,Xian Sun
Poor stability caused by side reactions such as corrosion, Zn dendrite and hydrogen evolution are crucial factors hindering commercial application in queous zinc ion energy storage systems. This article offers a strategy, zinc-rich artificial solid electrolyte interphase (ASEI) layer with polar groups by imidazole-2-carboxaldehyde (2-ICA) electrolyte additive, which helps form stable electrode/electrolyte interface and rapid Zn 2+ transfer interface with low resistance. Firstly, the chelation with Zn 2+ of 2-ICA and its zincophilic capability enable the rapid formation of the ASEI layer and result in more sites for initial nucleation, which then guides the uniform Zn 2+ deposition. Additionally, the introduced ASEI with polar groups accelerates the de-solvation kinetics of Zn 2+ and the Zn 2+ transfer ability in electrode/electrolyte interface, which enable high-rate charge and discharge. Therefore, the symmetric battery based on 2-ICA electrolyte exhibits excellent cycling stability at 20 mA cm −2 (cycling up to 800 h). At the same time, assembled Zn//Cu also has a high average Coulombic efficiency (99.2 %). The zinc-ion hybrid capacitors (ZICs) assembled based on this electrolyte also exhibit outstanding electrochemical properties. This work offers a simple and novel way to realize high performance and great safety zinc-based energy storage devices.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Chongyang Wei,Xiaoxue Han,Shouying Huang,Haoting Liang,Yidan Wang,Ting Li,Yong Wang,Yue Wang,Xinbin Ma
In the Fischer–Tropsch synthesis (FTS) reaction, the intricate reaction conditions are prone to induce phase transitions in iron carbides, which markedly affect catalytic performance. Manipulating and stabilizing the active phase is paramount for ensuring the catalyst efficiency. In this study, we regulated the Fe-Zn interaction to investigate the influence of iron carbides and the characteristics of surface carbon species. The strong interaction significantly enhanced the adsorption and dissociation of CO on the catalyst surface, thereby facilitating the formation of carbon-rich Fe 2(.2) C. Consequently, the FeZn-s catalyst exhibited the highest iron time yield (FTY) of 959 μmol CO ·g Fe - 1 ·s - 1 . But meanwhile, the stronger Fe-Zn interaction also accelerated the carbon deposition rate and elevated the graphitization degree of the surface carbon, expediting the catalyst deactivation. These results provide an insight into the modulation and stabilization of iron carbides by adjusting the interaction between the Fe and supports, which inspires the further development of Fe-based catalysts for FTS applications.
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