JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Wei She,Jing Wang,Xuewei Li,Jingfang Li,Guijie Mao,Weizuo Li,Guangming Li
One-pot direct synthesis of imines via reductive amination of nitroarenes with aromatic aldehydes remains a great challenge due in part to its over-hydrogenation of imines to secondary amines. Herein, a novel Co 3 ZnC and ZnO supported on N-doped carbon nanosheet catalyst with the thickness of ca. 5.0 nm was fabricated through the direct pyrolysis of a Co/Zn bimetallic MOFs at 500 °C (named as Co 3 ZnC-ZnO/NC-500). Surprisingly, the developed Co 3 ZnC-ZnO/NC-500 catalyst delivers 99.9 % conversion of nitrobenzene and 98.5 % selectivity to N -benzylideneaniline in one-pot reductive amination of nitrobenzene with benzaldehyde. Various characterizations (including as SEM, XRD, TEM, AFM, XPS, Raman and N 2 adsorption–desorption) have revealed that the generated small size of Co 3 ZnC alloy, abundant structural defects, larger specific surface area (105.5 m 2 ·g −1 ) as well as more basic sites are responsible for the outstanding catalytic activity of Co 3 ZnC-ZnO/NC-500 catalyst for tandem reaction. Moreover, the Co 3 ZnC-ZnO/NC-500 catalyst exhibits high stability during the recycling experiments without the loss of its catalytic activity. Notably, the results of contrast experiments have demonstrated that the intentional introduction of ZnO in Co 3 ZnC-ZnO/NC-500 catalyst plays a key role in the selectivity to N -benzylideneaniline in the tandem reaction. This study provides a new guideline for designing tandem catalysts with high selectivity.
研究领域:
材料化学
·
多相催化
·
有机合成
·
纳米材料
·
金属有机框架（MOFs）
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 85
·45397-45406
·
IF 3.708
Yuyu Bu,Zhuoyuan Chen
Carbon nitride@zinc oxide (C3N4@ZnO) composite with a quasi-shell–core structure was prepared in this work. The coating of C3N4 on ZnO significantly increases the photoelectrochemical anticorrosion performance of ZnO. When the amount of C3N4 added is 1 wt%, the C3N4@ZnO composite can provide the best photoelectrochemical anticorrosion capability for 304 stainless steel. This improved performance is attributed to the formation of an effective heterojunction electric field on the interface between C3N4 and ZnO, which improves the separation efficiency of the photogenerated electron–hole pairs, increases the lifetime of the photoinduced electrons, and enhances the photoelectrochemical anticorrosion performance of ZnO.
研究领域:
材料科学
·
腐蚀工程
·
光电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Dan Kuang,Yan Li,Yanfei Gao,Jian Guo,Xuyang Li,Shuang Xu,Bin Liu,Xianwen Liu,Yue Zhang,Zhinong Yu
Investigations on the high-performance flexible ultraviolet photodetectors have been becoming one of the interesting research focuses in recent years. ZnO is considered as suitable material for ultraviolet photodetection due to its wide bandgap (~3.37 eV). In this work, ZnO nanorod arrays were prepared using the hydrothermal method at the temperature of 70 ℃ on flexible substrates. Polyethyleneimine (PEI) was added into hydrothermal solution as the growth additive to achieve the performance improvement of the ZnO nanorod arrays ultraviolet photodetector. SEM, XRD, absorption spectroscopy, Raman spectroscopy and XPS were employed to characterize the morphology, crystallinity, optical properties and chemical composition. The introduction of PEI adjusts the growth process of ZnO nanorod arrays and affects the distribution of defect states, which brings out the improvement of the optoelectronic performance of ZnO nanorod arrays ultraviolet photodetectors. Compared with pure ZnO, the higher photo to dark current ratio and responsivity, and quicker time response speed are demonstrated in the PEI-assisted ZnO nanorod arrays photodetectors. And more photoresponse parameters are also discussed and compared. Furthermore, the photodetectors also display outstanding mechanical flexibility and robustness under multiple bending cycle tests. Our work presents a potential approach for improving the optoelectronic performance of simple-operated flexible ultraviolet photodetectors.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
半导体器件
·
柔性电子学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Yiqi Tang,Gongcheng Xu,Xu Zhang,Peicheng Cai,Dingning Mo,Qiuna Zhang,Ying Zhou,Xinghui Hou,Yu Wang
rGO/ZnO- x ( x = 1, 2, 3, 4) composites were successfully synthesized via a two-step co-precipitation method for effective hydrazine (N 2 H 4 ) detection, achieved by embedding reduced graphene oxide (rGO) flakes into ZnO hollow spheres. A systematic study was carried out on the effect of rGO incorporation on the gas sensing performance of the composites, and the enhanced mechanism was deeply discussed. The results indicated that the rGO/ZnO-3 sample exhibited optimum gas-sensing performance, achieving a high response value of 81 and a short response/recovery times (21 s/95 s) to 50 N 2 H 4 at 180℃, along with a low detection limit of 0.1 ppm, excellent reproducibility and long-term stability. The enhanced sensing performance of rGO/ZnO-3 sample can be attributed to the synergistic effect of structural advantages (3D porous networks for rapid gas diffusion) and electronic effects (heterojunction-driven charge transfer), achieving dual optimization of gas adsorption kinetics and signal transduction efficiency. This study presents an effective strategy for developing high-performance N 2 H 4 sensors while offering new insights into the modification of metal oxide-based sensing materials.
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 1
·32
·
IF 2.8
Zhang Wei,Li Haodan,Li Yuhang,Hu Feng,Cheng Qing,Liao Youwei,Yang Yan
In this work, a bio-based multifunctional composite film was fabricated by reinforcing a tung oil–natural rubber (N-TO) matrix with nano-ZnO via Diels-Alder modification and ultrasonic dispersion. The NR segments suppressed excessive crosslinking of tung oil, yielding a flexible semi-interpenetrating network, while well-dispersed ZnO nanoparticles enhanced thermal, photo-oxidative, and antibacterial performance. Compared with N-TO films, the ZnO-N-TO composite showed a significant increase in the initial decomposition temperature from 151.5 ℃ to 183.4 ℃ and in the residual carbon yield at 800 ℃ from 8.0% to 18.2%. Under UV irradiation, the color difference decreased from 9.6 to 3.1, reflecting more than 67% improvement in photo-stability. Antibacterial tests revealed clear inhibition zones of 6 mm against E. coli and 8 mm against S. aureus, whereas N-TO showed almost no activity. This work demonstrates a scalable and green approach to designing bio-based polymer films with integrated durability and antibacterial functionality, suitable for eco-friendly coatings and packaging applications.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Dan Liu,Shizhi Tan,Xujia Pan,Fei Mao,Haojie Qian,Zebo Wu,Huibin Yin,Shiyuan Gao,Yongjun Xu
Cu-based catalysts are prone to sintering and deactivation under the high-temperature conditions of methanol aqueous-phase reforming of methanol (APRM). ZnAl 2 O 4 spinel has attracted much attention due to its flexible surface properties and tunable structural composition. Therefore, this study proposes a dual-modification strategy involving the incorporation of ZnO nanosheets and sesbania powder(SP)-derived carbon species on ZnAl 2 O 4 spinel support, thereby promoting the highly dispersed distribution of Cu nanoparticles and preparing a Cu/ZnO–ZnAl 2 O 4 –C catalyst (CZZAC). The H 2 production rate of the CZZAC catalyst is 66.22 μmolH 2 /g cat ./s under 210 °C. Based on the TPSR characterization analysis of the APRM reaction path, the results show that the CZZAC catalyst begins to produce hydrogen at 145 °C and follows the reaction path of the methyl formate intermediate product. This research has prepared a novel spinel nanosheet, demonstrating its effectiveness in preparing highly dispersed Cu catalysts, and providing a practical and economical alternative to noble metal catalysts.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xiaofan Li,Xuechun Yang,Yun Guo,Lingchao Wang,Hui Guo,Yuqing Tian,Xiaotao Zhu,Yiyu Qiao,Yingying Li,Yuqi Feng
A zero-bias ZnO NRs/NPCDs/PEDOT:PSS sensor detects NH 3 and C 7 H 8 at room temperature. • N/P co-doped carbon dot-sensitized ZnO NRs exhibit superior dual-gas sensing performance. • Wireless signal transmission enables real-time monitoring on mobile and computer terminals. Conventional gas sensors often rely on external heating sources or high operating voltages, whereas many self-powered alternatives still suffer from complex materials and fabrication processes. Herein, we demonstrate a structurally simplified, low-cost, self-powered heterojunction device capable of detecting ammonia (NH 3 ) and toluene (C 7 H 8 ) at room temperature (RT) and under zero-bias operation. The device is constructed by integrating carbon-dot (CD)-sensitized, vertically aligned ZnO nanorod arrays with a poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) hole-transport layer, thereby forming an organic–inorganic p-n heterojunction. XRD, SEM, TEM, XPS, FTIR, PL, UV–vis and BET analyses confirm the formation of the CD-sensitized ZnO nanorod arrays and clarify the roles of the microstructure, surface states, and interfacial charge transfer in gas sensing. The built-in electric field promotes carrier separation, enabling zero-bias gas sensing. Elemental doping of the CDs shows that nitrogen/phosphorus co-doped CD (NPCD) modification leads to a superior dual-gas response, with the ZnO NRs/NPCDs200/PEDOT:PSS device exhibiting responses of 489% and 454% toward 100 ppm NH 3 and C 7 H 8 , respectively, outperforming the P-doped and N-doped CD-modified counterparts. Repeated cycling tests further demonstrate stable response-recovery behavior, with corresponding responses of approximately 418% and 339% toward 10 ppm NH 3 and C 7 H 8 , respectively, confirming good repeatability and cycling stability for dual-gas detection. Wireless signal transmission to mobile and computer terminals via self-developed software further highlights its potential for IoT-based remote monitoring. These results establish a practical material-and-device strategy for developing low-power, dual-gas sensors operable under ambient conditions. Download: Download high-res image (155KB) Download: Download full-size image
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DOI
高影响因子
ACS Applied Bio Materials
·
2025
·
IF 4.7
Zhu Gao,Xinping Han,Wenyue Gao,Jianghua Li,Cuijuan Wang
Bacterial susceptibility testing and real-time inactivation are critical for safeguarding public health with broad applications in food safety monitoring and clinical diagnostics. For pH-dependent bacterial determination and hyperthermal inactivation applications, we developed needle-shaped ZnO/ZIF-L systems through a zeolitic imidazolate framework coating of zinc oxide by a self-template strategy. The pH-dependent ZnO/ZIF-L-embedded hydrogels were prepared by UV light-mediated olefin photopolymerization using acrylamide, N,N’-methylenebis(acrylamide), hydroxyethyl methacrylate, bromothymol blue (BTB), and ZnO/ZIF-L. The hydrogel achieves rapid visual detection of bacterial infections through a pH-responsive colorimetric transition, leveraging BTB to signal acidic microenvironmental shifts characteristic of bacterial proliferation. The ZnO/ZIF-L photosensitizers can enhance charge separation and transfer and generate highly reactive oxygen species. Escherichia coli and Staphylococcus aureus can be effectively inactivated for ZnO/ZIF-L hydrogels by a physical disruption/photodynamic synergistic antibacterial mechanism. The antibacterial efficiency can reach as high as 99%. The proposed strategy not only provides a sensitive strategy for bacterial determination but also implements efficient inactivation of bacteria simultaneously. This strategy combines real-time bacterial biosensing with on-demand antimicrobial action in a single platform, overcoming the limitations of conventional sequential detection-treatment approaches.
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70420
·
IF 0
Hui Bai,Guyu Zhang,Fengqin Tang,Lili Huang,Mingxia Tian,Libing Hu,Zhenghang Qi,Jianhui Jiang
Developing porous-structured organic semiconductor photocatalysts with high charge transfer efficiency is crucial for solar energy utilization, yet remains challenging in pollutant remediation. Herein, an S-scheme C-ZnO/B-g-C 3 N 4 photocatalyst with oxygen vacancies was fabricated through modified biomass-derived C doping for methylene blue (MB) degradation. The optimized catalyst achieved 97.8% degradation efficiency within 70 min under visible light. UV-DRS analysis revealed that C doping narrowed the bandgap and enhanced visible-light absorption. XPS results confirmed the S-scheme charge transfer pathway in C-ZnO/B-g-C 3 N 4 . The synergistic effects of C doping and oxygen vacancies significantly improved charge separation and facilitated S-scheme heterojunction formation. The catalyst exhibited superior photocatalytic performance in alkaline conditions and maintained excellent recyclability. Radical trapping experiments identified the primary reactive species as h + > ·O 2 − > ·OH in descending order of contribution. This work provides a promising strategy for solar-driven pollutant remediation by combining biomass-derived carbon modification with S-scheme heterojunction engineering.
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产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haiyan Yao,Yuan Fan,Emine Sumeyra Turali Emre,Jiaolong Wang,Xuewen Wang,Junchao Wei
Bacterial infections and inflammation caused by persistent infections are the primary reasons for delayed healing of infected wounds. Chirality, a prevalent characteristic in nature, plays a crucial role in chemical recognition and interactions between materials and biosystems. Herein, chiral ZnO NPs was prepared and the effects of charity on antibacterial and immune regulation were investigated. D-ZnO NPs showed better antibacterial performance against both S.aureus and E.coli compared with L-ZnO NPs, and the D-ZnO NPs (250 μg/mL) antibacterial rates against of S.aureus and E.coli were 72.2 ± 6.3 % and 98.7 ± 0.22 %, respectively. D-ZnO NPs demonstrated better interaction with bacteria and destroyed bacterial cell walls, leading to the protein leakage and more reactive oxygen species (ROS) production. Furthermore, D-ZnO NPs could suppress over-reacted inflammation and promote the polarization of macrophages towards M2 phenotype. In vivo results showed that D-ZnO NPs effectively promoted the healing of infected wounds, achieving a wound healing rate of 100 % on day 10. This work provides novel insights into the development of chiral and enantioselective nanomaterials, as well as promotes the application of chiral nanomaterials in the biomedical fields.
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产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yiwang Dong,Asma Noor,Muneerah Alomar,Qaisar Hayat,Jahangeer Ahmed,M.A.K. Yousaf Shah,Yuzheng Lu,Muhammad Yousaf,Changhong deng
： Achieving high ionic conductivity at reduced temperatures presents a critical challenge in solid oxide fuel cell (SOFC) research. The primary objective is the development of innovative electrolytes characterized by higher ion transport, thereby leading to enhanced ionic conductivity . In this context, we have fabricated a nanocomposite electrolyte featuring a heterostructure composed of the spinel MnFe 2 O 4 (MFO) and hexagonal ZnO (MFO-ZnO) to facilitate rapid ion transport at lower operating temperatures. This study initially delves into the structural, morphological, optical, and interfacial properties of prepared MFO-ZnO fuel cell devices. Subsequently, our fabricated device exhibits remarkable performance, with a peak power density of 750 mW·cm² and a notably high ionic conductivity of 0.12 S/cm at 550 °C. This achievement can be attributed to favorable interfacial contacts between MFO and ZnO, along with an elevated concentration of oxygen vacancies resulting in enhanced efficiency of ionic transport. These results strongly indicate that the MFO-ZnO heterostructure holds significant promise as an electrolyte for developing fuel cells that operate at lower temperatures.
研究领域:
材料科学
·
电化学
·
能源工程
·
纳米科技
·
固态离子学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Han Xu,Yiming Zhao,Xuan Miao,Mingyu Li,Hongjun Ji,Yufeng Li
Low-dielectric glass sealing is important for advanced electronic packaging; however, integrating such glasses with high-expansion metals such as Cu and stainless steel (SUS 304) remains challenging because of thermal-expansion mismatch and limited interfacial adhesion. In this work, ZnO was incorporated into a borosilicate glass matrix to tailor the thermophysical properties and promote interfacial bonding. Microstructural analyses show that Zn 2+ tends to form [ZnO 4 ] structural units and reduce non-bridging oxygen, thereby restricting alkali-ion mobility and maintaining low dielectric loss. Meanwhile, the partial substitution of SiO 2 by ZnO lowers the average network rigidity, leading to a reduced glass transition temperature and an increased CTE of 11.4 × 10 −6 °C −1 . At the hetero-interfaces, ZnO promotes the formation of a ZnCr 2 O 4 /NaCrO 2 composite layer on SUS 304 and Zn/Cu interdiffusion near the Cu side. Under the selected sealing condition of 810 °C for 10 min, the Cu/glass/SUS 304 joints achieved a shear strength of 20.3 ± 3.8 MPa. These results suggest that ZnO-doped borosilicate glass is a promising low-dielectric sealing material for heterogeneous electronic packaging.
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DOI
高影响因子
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