JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 11
·4533-4547
·
IF 3.5
Ben Zixiang,Zhu Zhiwei,Pu Jin,Xu Fugang
In this work, a composite ZnO/MoS 2 /AuNPs supported on carbon fiber cloth (CFC) was prepared by progressively growing ZnO nanorods array, MoS 2 nanosheets and AuNPs on CFC for sensitive SERS detection and efficient photocatalytic degradation of organic dye pollutants. The ZnO/MoS 2 heterojunctions showed a significant CM effect and further decorating AuNPs with EM effect improved the detection limit of crystal violet (CV) from 10 –6 to 10 –13 M. The composite can be used for qualitative SERS detection of CV or Nile blue in standard solution or real samples with high stability and good stability. The enhancement mechanisms of CFC/ZnO/MoS 2 and CFC/ZnO/MoS 2 /AuNPs were discussed based on corresponding characterizations and calculations. The composite also showed efficient photocatalysis for dye degradation. The ZnO/MoS 2 heterojunction played a key role in enhancing the charge separation rate and improving the photocatalytic performance. The materials achieved degradation efficiencies of 71.4% for CV (1.5 × 10 –5 M) after 60 min irradiation under visible light. The active radical species were investigated and possible degradation approach were proposed. Such composite with both SERS enhancement and visible light photodegradation ability has great promise in environment monitoring and remediation. Graphical
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CATALYSIS LETTERS
·
2024
·Vol. 154
·期 7
·3829-3838
·
IF 2.3
Wang Mingyue,Li Ting,Tian Yuhao,Zhang Jiarong,Cai Weijie
To develop high-performance catalysts for greenhouse gas CO 2 reforming with ethanol (EDR) is progressively inspired by the urgent requirement of CO 2 elimination in order to meet with the sustainable development. In this work, the bimetallic Co(Ni)/ZnO catalyst derived from MOFs was investigated in detail with a focus on the effect of Ni dopant. The EDR results indicated that the bimetallic Co(Ni)/ZnO catalyst presented better activity as well as less formation of byproducts in comparison with the monometallic Co/ZnO catalyst. 100% of ethanol conversion was obtained at 500 °C for Co(Ni)/ZnO versus 650 °C for Co/ZnO. Moreover, no acetone formation was observed over Co(Ni)/ZnO catalyst while the concentration of acetone in Co/ZnO was as high as 10 mol%. Characterization results depicted that the strong synergistic effect between Ni and Co in Co(Ni)/ZnO catalyst might greatly stabilize active metal cobalt with smaller particle size, improve the reducibility and facilitate the generation of oxygen defects, thereby enhancing the catalytic performance. To a certain extent, this work might contribute to the design of efficient catalysts for other catalytic applications. Graphical
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Nannan Li,Dongyang Jiang,Zeguang Zhou,Yanyue Lu,Lei-Zhong,Wing Cheung Law,Chak Yin Tang
Active packaging, which can monitor food freshness and extend the shelf life, has gained significant attention in recent years. This study aims to develop a novel carboxymethyl cellulose (CMC)/starch/anthocyanins/ZnO active films with enhanced properties and specific functionalities. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed that the addition of anthocyanins and nano-ZnO particles (ZnO-NPs) led to heterogeneous microstructures and a slight decrease in the crystallinity. Fourier transform infrared spectroscopy (FTIR) indicated that there were no chemical interactions among film components. Active films containing ZnO-NPs exhibited improved ductility, as well as enhanced light barrier and water resistance properties. Notably, a shift from hydrophilic to hydrophobic behavior of the films was observed with high ZnO-NP content, as evidenced by a significant increase in the water contact angle (from 63.44° to 114.22°). Furthermore, the presence of only 1 % ZnO-NPs resulted in efficient inhibition of Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) growth. Moreover, active films containing both anthocyanins and ZnO-NPs were highly sensitive to pH changes in buffer solutions (pH 2–11). Based on the results, a recommended film formulation for future active packaging applications is a 80:20 CMC/starch blend with 3 % ZnO-NPs and 0.1 g anthocyanins.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xuan Xuan,Shuang Meng,Guozhe Sui,Ning Liu,Dongxuan Guo,Dantong Zhang,Xue Yang,Yue Li,Jinlong Li
The rational design of solid-solution-oxide heterostructure presents a promising pathway to synergize band structure engineering and interfacial charge dynamics in advanced photocatalysis. Herein, a novel S-scheme CeZnO/ZnO heterojunction was fabricated through solid-solution lattice engineering, where Ce-O-Zn covalent bonding networks are strategically constructed at phase boundaries via controlled exceedance of the Ce solubility limit in ZnO matrix. Coupled with Ag nanoparticle-induced localized surface plasmon resonance (LSPR), this hierarchical system achieves remarkable visible-light-driven tetracycline (TC) degradation (90.4 % within 60 min). The outstanding degradation performance can be attributed to the formation of a built-in electric field at the Ce-O-Zn interface, the presence of oxygen vacancies, and the synergistic catalytic effect of Ag nanoparticles. Density functional theory (DFT) calculations and experimental characterizations further reveal that the CeZnO/ZnO heterojunction facilitates S-scheme charge transfer via Ce-O-Zn bonds, improving charge transfer and separation efficiency while preserving the strong redox capability of photo-generated charge carriers. This study provides valuable insights into the design of high-performance heterojunction photocatalysts and carries significant implications for the development of photocatalysis.
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iScience
·
2025
·
IF 4.1
Zhiwei Meng,Zirui Peng,Yupeng Yan,Qin Zhang,Yang Li
Photocatalytic technology is currently one of the most effective methods for removing tetracycline (TC) from the environment; however, the underlying photocatalytic mechanism remains unclear. In this study, zinc oxide quantum dots (ZnO-QDs)/hollow-sphere g-C 3 N 4 (CNHS) S-scheme heterojunction photocatalysts were synthesized for the photocatalytic degradation of tetracycline. Experimental results showed that the 7% ZnO-QDs/CNHS photocatalyst exhibited excellent TC degradation efficiency, with a removal rate of 80.2% within 15 min. Through free radical conversion pathway analysis, singlet oxygen ( 1 O 2 ) was identified as the primary active species responsible for tetracycline degradation. Further calculations indicated that the combination of holes (h + ) and superoxide radicals (O 2 − ) produces 1 O 2 , accounting for 83.28% of the total contribution. These findings provide theoretical support for 1 O 2 as the primary active species in pollutant degradation.
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JOURNAL OF ELECTROCERAMICS
·
2024
·
IF 1.7
Wang Bo-wen,Lu Jia-zheng,Gao Peng-zhao,Fu Zhi-yao,Jiang Zheng-long,Gong Wei-wei
In this paper, influence of radius and electronegativities of seven kinds of donors on the composition, microstructure, mechanical, thermal and electrical properties of ZnO varistors were investigated via XRD, SEM, XPS, mechanical, thermal and electrical properties tests. Results showed that when sintered at 1100 °C for 2 h, the obtained varistors exhibited a dense microstructure, where radius of donors played an important role on the grain size and size distribution of varistors; Mechanical properties and coefficient of thermal expansion of varistors were mainly affected by the radius of donors, with specimen 6# possessing the highest values of 123.46 MPa (σ f ), 80.47 GPa ( E f ), and 6.58 × 10 −6 °C −1 ( λ c ), respectively; Values of E 1mA and α initially increased and then decreased with the increase of donors’ radius, whereas those of J L and K exhibited opposite trends. E 1mA and α had maximum values of 569.94 V mm –1 and 26.70, whereas J L and K possessed the lowest values of 2.31 μA⋅cm −2 and 1.35, respectively, when Co 2+ worked as the donor (specimen 6#). The DC aging process of ZnO varistors obeyed the ion migration mechanism, the radius of donors can affect the number of it entering the ZnO lattice, which can limit the migration of zinc gaps via the formation of substitution and filling defects in the ZnO lattice. The electronegativity of donors can reduce the ion migration speed via the stronger electrostatic force, and specimen 6# possessed the lowest DC aging properties ( K T = 1.68).
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International Journal of Applied Ceramic Technology
·
2025
·
IF 2.3
Jintong Liu,Yifan Dong,Xin Qiu,Haoxuan Ma,Tianqin Li,Xinhong Liu,Quanli Jia
Unfired calcium aluminate cement (CAC) bonded alumina-spinel based plug precasts have many advantages including energy saving, shorter placement period, lower cost and good thermal shock resistance in comparison with fired purging plugs. Unfortunately, their strength was drastically decreased in the range of 700°C–1000°C, which was attributed to the destruction of the hydrates network of the castables, and structural spalling was also occurred because of their lower strength. To respond these, a feasible method to fabricate higher strength of unfired precast was proposed by adding ZnO powders, and the effect of the ZnO content on the microstructure and properties of the castables was studied in this paper. Results demonstrate that cold strength of the specimens after heat-treating at different temperatures increases significantly by rising of the ZnO level, permanent linear change of the castables after firing at 1400°C and 1600°C decreases, and hot strength value noticeably increases from 36.3 to 58.4 MPa, exhibited that cold and hot strength of CAC bonded castables significantly improve via adding ZnO powders. Strengthening mechanism on the strength of ZnO-bearing castables is ascribed to formation of ZnAl 2 O 4 and ZnCr 2 O 4 , and their strengthening effect is much higher than that of the weakening effect by CAC hydration products fired at 600°C–1000°C, and this strength reinforcing effect is intensified with rising of heat-treating temperature. In addition, ZnCr 2 O 4 and ZnAl 2 O 4 can dispense in MA spinel grains to form spinel solid solution at 1400°C–1600°C, (Al 1− x Cr x ) 2 O 3 solid solution is formed via Cr 2 O 3 reacts with Al 2 O 3 . Those favor the densification process of the matrix structure, creating strength reinforcing effect of the ZnO-containing castables, thereby significantly increase their strength.
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ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Anran Liu,Kaifei Yin,Li Mi,Mengyao Ma,Yuanjian Liu,Ying Li,Wei Wei,Yuanjian Zhang,Songqin Liu
Nucleoside diphosphatase kinase A (NDPK-A) is a metastasis-suppressor protein and a biomarker that act on a wide range cancer cells to inhibit the potential metastasis. Herein, we present a simple photoelectrochemical immunosensor based on ZnO nanorod arrays for the sensitive detection of NDPK-A. The ZnO nanorod arrays cosensitized with CdS nanoparticles and Mn 2+ displayed a high and stable photocurrent response under irradiation. After anti-NPDK-A nanobodies were immobilized to the ZnO nanorod arrays, the proposed immunosensor can be utilized for detecting NPDK-A by monitoring the changes in the photocurrent signals of the electrode resulting from immunoreaction. Accordingly, the well-designed immunosensor exhibited a low limit of detection (LOD) of 0.3 pg mL −1 and a wide linear range from 0.5 pg mL −1 to 10 μg mL −1 . The R 2 of the regression curve is 0.99782. Meanwhile, the good stability, reproducibility and specificity of the resulting photoelectrochemical biosensor are demonstrated. In addition, the presented work would offer a novel and simple approach for the detection of immunoreactions and provide new insights in popularizing the diagnosis of NPDK-A.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Jingjing Tian,Mengen Yan,Ran Xu,Jiayang Zhao,Luodan Wang,Weisong Zhang,Yan Guo,Heng Tian,Yonghao Xu
Polymer-based dielectric capacitors are considered as important energy storage components in the electronic devices and power system owing to their high power density, fast charge–discharge speed, and good reliability. However, the increment of leakage current density at elevated temperature and electric field significantly descends the breakdown strength ( E b ) and energy storage density, restricting their application in harsh environments. Herein, we selected ZnO and SnO 2 n-type semiconductors to construct nn-heterojunction ZnO-SnO 2 nanofibers and introduced them into PEI matrix to fabricate the ZnO-SnO 2 /PEI nanocomposite films via solution casting method. By constructing potential barrier at the interface of ZnO and SnO 2 , charge carrier can be captured and constrained in the potential barrier well during the process of carrier transport, effectively hindering the charge conduction in the nanocomposites, and thus suppressing the leakage current density and boosting the E b and energy storage density. As a consequence, nanocomposite film with 0.50 wt% nanofibers demonstrates high E b of 647 MV/m and large discharge energy density ( U d ) of 8.24J/cm 3 at 25 ℃. Even at 150 ℃, superior U d of 6.02 J/cm 3 , high charge–discharge efficiency ( η ) of 83.5 %, high E b of 593 MV/m are realized in the nanocomposite, which are significantly enhanced than that of pure PEI ( U d ∼ 1.98 J/cm 3 , η ∼ 57.5 %, E b ∼ 438 MV/m). The work provides a novel and feasible strategy for developing high-performance polymer-based dielectric capacitors at elevated temperature.
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ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Lixin Song,Pingfan Du,Jie Xiong,Frank Ko,Can Cui
ZnO nanoparticles (ZNPs) and ZnO nanowires (ZNWs) were fabricated via electrospinning and calcination . The ZNPs and ZNWs were blended with different mass ratio by varying ZNWs from 0% to 100% and serviced as photoanodic film of dye-sensitized solar cells (DSSCs) via spin coating . The efficiency of these DSSCs reached a maximum of 2.6% at 20 wt% ZNWs. In order to improve the photovoltaic properties of ZNWs/ZNPs hybrid photoanodic film, the ZNWs/ZNPs hybrid film was modified by the incorporation of multi-walled carbon nanotubes (MWCNTs) into ZnO matrix including both ZNPs and ZNWs combined with TiCl 4 post-treatment. As a result, the efficiency of DSSCs increased from 2.6% to 3.8%, which is mainly attributed to the increased dye loading, faster electron transport , and less electron loss.
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SOLAR ENERGY
·
2019
·
IF 4.674
Weihua Fei,Yun Song,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
A visible-light-active Ni foam@ZnO@ZnFe-LDH composite photocatalyst was fabricated with well-defined porous 2D/2D interconnected nanosheets of ZnO and binary ZnFe layered double hydroxide (ZnFe-LDH) growing vertically on the Ni foam substrate. In view of the excellent conductivity of Ni foam, it can be used as an electrode substrate to deposit ZnO nanosheets on the surface by electrodeposition . Then the ultrathin layered 2D ZnFe-LDH was uniformly coated on ZnO nanosheets by hydrothermal method. A highly effective three-electrode photoelectrocatalytic (PEC) system was constructed with Ni foam@ZnO@ZnFe-LDH as photoanode. The 2D/2D core-shell heterojunction formed between ZnO core and ZnFe-LDH shell not only resulted in a narrowing bandgap and increased the visible light absorption of the ZnO, but also promoted the migration of the photogenerated electrons and then the degradation efficiency with a low applied potential was greatly improved. The dyes (Acid Red 1 as model) and hexavalent chromium ions (Cr(VI)) in water can be simultaneously removed by oxidation reaction on the anode and reduction reaction on the cathode, respectively. In addition, the Ni foam@ZnO@ZnFe-LDH composite photocatalyst also showed outstanding stability during the application process. Thus, the photoelectrocatalytic synergitic effect based on Ni foam@ZnO@ZnFe-LDH gives a simple and effective strategy to fast remove Cr(VI) and organic pollutants in PEC process at low voltage.
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INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Jing Li,Baodan Liu,Aimin Wu,Bing Yang,Wenjin Yang,Fei Liu,Xinglai Zhang,Vladimir An,Xin Jiang
Photoelectrochemical water splitting has emerged as an effective artificial photosynthesis technology to generate clean energy of H2 from sunlight. The core issue in this reaction system is to develop a highly efficient photoanode with a large fraction of solar light absorption and greater active surface area. In this work, we take advantage of energy band engineering to synthesize (GaN)1–x(ZnO)x solid solution nanowires with ZnO contents ranging from 10.3% to 47.6% and corresponding band gap tailoring from 3.08 to 2.77 eV on the basis of the Au-assisted VLS mechanism. The morphology of nanowires directly grown on the conductive substrate facilitates the charge transfer and simultaneously improves the surface reaction sites. As a result, a photocurrent approximately 10 times larger than that for a conventional powder-based photoanode is obtained, which indicates the potential of (GaN)1–x(ZnO)x nanowires in the preparation of superior photoanodes for enhanced water splitting. It is anticipated that the water-splitting capability of (GaN)1–x(ZnO)x nanowire can be further increased through alignment control for enhanced visible light absorption and reduction of charge transfer resistance.
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