Journal of Photonics for Energy
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2026
·
IF 2.5
Pengyu Fei,Yun Li,LingLing Jiao,Fan Cao,Zhouze Chen,Hongbin He,Ruoxuan Peng,XingYu Zhan,Jiancheng Zhou,Yitao Si,Naixu Li
Photothermal-assisted photocatalysis, which couples localized thermal energy with photogenerated charge carriers to overcome thermodynamic and kinetic limitations, has emerged as an effective strategy for solar-driven CO2 reduction. Herein, nanoflower-like NiO/ZnO p–n heterojunction spheres were rationally constructed via a simple hydrothermal calcination method to achieve efficient concentrated photothermal-assisted CO2 reduction. The unique nanoflower morphology provides abundant interfacial contact between NiO and ZnO, while the formation of the p–n heterojunction establishes an internal electric field that suppresses electron-hole recombination. Under concentrated irradiation (4.31 W·cm−2), the photothermal coupling effect reduces the apparent activation energy and enables the NiO/ZnO photocatalyst to deliver CO and CH4 production rates of 51.78 and 15.96 μmol·g−1·h−1, which are 7.92 and 9.61 times higher, respectively, than those obtained under nonconcentrated illumination. Photoelectrochemical measurements and in situ DRIFTS further reveal that the built-in electric field facilitates directional charge transfer from ZnO to NiO, thereby promoting CO2 adsorption and activation. We demonstrate an efficient photothermal-coupling strategy to construct high-performance catalysts for artificial photosynthesis and solar-to-fuel conversion.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xuetong Zhao,Yan Hu,Qi Wang,Gang Liu,Hansheng Cai,Hongwen Liu,Jindong Yang,Liangbin Ai,Jimou He,Yu Gan,Lulu Ren,Ruijin Liao
Cold sintering bridges the ZnO–ZrO 2 co-sintering temperature mismatch. • ZrO 2 is retained as an intergranular pinning phase at 850 °C. • ZrO 2 pinning refines ZnO grains from 2.48 to 1.65 μm. • The optimized ceramic achieves α = 65 and E b = 992 V mm −1 . ZnO varistor ceramics are widely employed for overvoltage protection in electronic circuits and power grids owing to their excellent nonlinear non-ohmic characteristics. However, their insufficient voltage gradient limits further development toward miniaturized, lightweight, and highly reliable devices. Herein, ZrO 2 is introduced as a secondary pinning phase to refine ZnO grains and promote the formation of Bi-rich intergranular phases, enabling the synergistic enhancement of breakdown field ( E b ) and nonlinear response. More importantly, the low-temperature densification feature of cold sintering bridges the co-sintering temperature gap in ZnO-based composite ceramics, suppressing the solid solution of Zr 4+ ( r = 0.80 Å) into the Zn 2+ ( r = 0.74 Å) lattice and thus greatly enhancing the effectiveness of ceramic compositing. At the optimized ZrO 2 content of 2 wt%, the segregated ZrO 2 secondary phase pins grain-boundary migration and reduces the average ZnO grain size from 2.48 to 1.65 μm. Moreover, the increased formation of Bi-rich boundary phases provides additional interfacial sites for oxygen adsorption and electron trapping, raising interface state density ( N s ) from 4.7518 × 10 16 m −2 for the undoped ceramic to 7.4102 × 10 16 m −2 with 2 wt% ZrO 2 addition and barrier height ( φ b ) to 0.9245 eV. As a result, the ceramic achieves a high nonlinear coefficient ( α ) of 65 and an enhanced E b of 992 V mm −1 . Further ZrO 2 incorporation suppresses the grain size to 1.40 μm and increases E b beyond 1200 V mm −1 , highlighting the effectiveness of cold sintering in constructing high-gradient ZnO-based composite varistors. This finding demonstrates that cold sintering opens a new pathway for the fabrication of composite ceramics with improved co-sintering compatibility.
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高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
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2026
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IF 3.3
Yuye Zhang,Yiyi Zhang,Zhicheng Su,Danquan Lan,Wenchang Wei,Junwei Zha
Cellulose-based insulation paper is widely used in high-voltage equipment, but its limited thermal conductivity and dielectric strength restrict reliable performance under elevated temperatures and strong electric fields. In this work, a dual-phase composite paper is developed by incorporating nano-ZnO and polyimide (PI) into a cellulose matrix, guided by molecular dynamics (MD) simulations. The combined fillers improve interfacial compatibility, suppress void defects, and establish continuous thermal pathways together with stable insulating barriers. Simulation predictions of enhanced thermal transport, charge suppression, and mechanical reinforcement are verified by experiments. The optimized formulation containing 3 wt% nano-ZnO and 6 wt% PI achieves a thermal conductivity of 0.294 W·m⁻¹·K⁻¹, a tensile strength of 72.12 MPa, corresponding to 87.26% and 41.02% improvements over pure cellulose (P0). Meanwhile, the breakdown strength increases from 60.22 to 73.51 kV·mm⁻¹ (+22.07%), and the relative permittivity and dielectric loss tangent decrease to 2.49 (−40.86%) and 0.46% (−43.21%). These results demonstrate that the dual-filler strategy provides a structurally compact and functionally stable composite architecture, enabling simultaneous enhancement of thermal, mechanical, and dielectric properties. This study confirms the effectiveness of simulation-guided design in accelerating the development of multifunctional cellulose-based insulating materials and highlights their potential for application in next-generation high-voltage power systems.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Shuheng Ding,Zhenyue Liu,Yujun Guo,Jiayi Qu,Feifei Wang,Davoud Dastan,Xiaoming Tan,Xingtai Chen,Xi-Tao Yin
Sm 2 O 3 -modified ZIF-8-derived ZnO nanoparticles were first prepared by a one-step hydrothermal method. • The maximum response to 100 ppm ethanol was 210 at the operating temperature (275 °C). • The reasons for the improved gas-sensitive performance were explored. Constructing heterojunctions is recognized as an effective strategy for enhancing gas sensor performance. Rare-earth metal oxides, owing to their unique properties, can significantly improve the sensing capability of single-metal oxides. This work produced a ZnO/Sm 2 O 3 heterostructure for ethanol gas sensing via a simple one-step hydrothermal method. A static system was used to investigate the gas-sensing properties of the as-prepared sensors. Compared with the pure ZnO sensor, the ZnO/Sm 2 O 3 heterojunction sensor exhibited a significantly enhanced sensing performance toward 100 ppm ethanol. Specifically, its response increased from 130 to 210, the optimal operating temperature decreased from 295 °C to 275 °C, and the recovery time was shortened from 84 s to 17 s. In addition, the sensor demonstrated good selectivity toward ethanol over other interfering gases, as well as excellent long-term stability, while maintaining good linearity and repeatability. The material was characterized using various techniques, including XRD, XPS, SEM, TEM, BET, UPS, and Hall-effect measurements, in terms of micromorphology, elemental composition and specific surface area, revealing cube-like structures and confirming the successful formation of an n-n heterojunction. Finally, the underlying mechanism for the enhanced gas sensing performance was discussed in detail. Download: Download high-res image (68KB) Download: Download full-size image
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 9
·949
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IF 3
Chérif Ichraf,Ousji Rached,Dendeni Maha,Mejri Asma,Hamrouni Abdessalem,Linoubli Lazhar,de la Presa Patricia,Ferhi Mounir,Gao Yanan
This study reports a plant-mediated synthesis of zinc oxide nanoparticles (G-ZnO-NPs) using cinnamon bark extract during the zinc oxalate precipitation step. The extract acts as both an aqueous precipitation medium and a capping agent with cinnamaldehyde identified as the predominant phytochemical and coumarin as a comparatively minor constituent. These phytochemicals modulate particle growth and defect formation, thereby tailoring the physicochemical properties of the resulting nanoparticles. The properties of G-ZnO-NPs were systematically compared with those of commercial ZnO (C-ZnO) and ZnO nanoparticles synthesized via zinc oxalate precipitation in water (W-ZnO-NPs). Relative to both reference materials, G-ZnO-NPs exhibit reduced particle agglomeration, a remarkable particle size reduction (15.9 nm), an increased specific surface area, a lower band gap energy, and more efficient separation of photogenerated electron-hole pairs partly attributable to defect-mediated charge trapping, thereby resulting in a higher photocurrent density and a lower charge-transfer resistance. Collectively, these features contribute to enhanced photocatalytic and antibacterial performance. Under xenon-lamp irradiation, G-ZnO-NPs achieve 98.7% degradation of methyl orange (MO) within 150 min, compared with 83.6% and 88.9% for W-ZnO-NPs and C-ZnO, respectively, with corresponding first-order kinetic constants of 0.0289, 0.0118 and 0.0146 min -1 . Moreover, G-ZnO-NPs exhibit good structural stability and satisfactory recyclability after five consecutive photodegradation cycles, with hydroxyl radicals (OH . ) and photogenerated holes (h + ) identified as the predominant reactive species involved in MO degradation. In addition, G-ZnO-NPs demonstrate superior antibacterial activity than both reference ZnO samples particularly against Escherichia coli and Bacillus subtilis . These results highlight the potential of the cinnamon-based synthesis method as an eco-friendly strategy for producing ZnO-NPs with tailored properties offering a dual benefit for addressing water pollution and antibacterial resistance.
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高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Peilin Zuo,Zhi Wan,Mingxin Ren,Zhiyuan Chen,Zhenghang Tian,Jizhou Yang,Gangfeng Li,Luna Yang,Peng Hu,Feng Teng,Haibo Fan
MXene has gained prominence as a prospective electrode material for supercapacitors owing to its unique layered architecture, high electrical conductivity and intrinsic hydrophilicity. However, the intrinsic tendency for severe interlayer restacking in MXene markedly restricts the exposure of electrochemically active surface sites. In this work, we prepare a ZnO quantum dots/MXene composite film electrode with a 0D-2D structure and evaluate its electrochemical performance in neutral aqueous electrolyte (1.5 M Na 2 SO 4 ). The synergistic interfacial interaction between ZnO QDs and Ti 3 C 2 T x nanosheets facilitates enhanced specific surface area and the optimized utilization efficienc of electroactive site. Notably, even with an average size of 16.3 nm, the incorporated ZnO nanoparticles with a relatively high degree of dispersion still contribute significantly to the enhanced performance of the Ti 3 C 2 T x electrode. This structural configuration endows the ZnO QDs/Ti 3 C 2 T x composite with superior energy storage capability (305 F g −1 at 0.5 A g −1 ) and remarkable rate performance, outperforming pristine Ti 3 C 2 T x electrodes (125.87 F g −1 ). After 5000 charge-discharge cycles at a current density of 10 A g −1 , the capacitance retention rate is 96.79 %, showing excellent cycle stability. The quasi-solid-state symmetric supercapacitor based on ZnO QDs/Ti 3 C 2 T x exhibits a high energy density of 8.2 Wh kg −1 at a power density of 349 W kg −1 . Notably, even after 5000 cycles, the SSCs exhibit a capacitance retention rate of 93.44 %, demonstrating outstanding cycling stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xie Xiaoling,Jiang Haotian,Li Wei
In this work, ZnO@SnO 2 core-shell nanofibers were synthesized through a facile coaxial electrospinning method and used to detect ethanol vapor. The core-shell nanofibers were characterized using various techniques, such as XRD, SEM, TEM, and XPS. The characterization results show that the core-shell nanofibers are solid and have a higher concentration of chemisorbed oxygen species on their surface compared to both pure ZnO and SnO 2 nanofibers. The gas-sensing experiment results demonstrate that the core-shell nanofibers exhibit higher sensitivity than both pure nanofibers. Specifically, upon exposure to 100 ppm ethanol vapor at 320 °C, the response of the core-shell nanofibers is 53.2, with minimal cross-sensitivity to other interfering vapors. Additionally, the core-shell nanofibers show good repeatability and long-term stability. The superior sensing performance is attributed to the heterojunction formed between ZnO and SnO 2 , which enhances the surface chemisorption of oxygen species and facilitates efficient charge transfer.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hai-Jiao Jiang,Yu-Lin Mei,Wei-Ming Liu,Zhao-Jin Wu
Oxygen-deficient ZnO nanoparticles with excellent piezo-photocatalytic activity are successfully prepared by thermal decomposition of hydrozincite (Zn 5 (OH) 6 (CO 3 ) 2 ) obtained via a simple precipitation method. The piezo-photocatalytic degradation of organic dyes (Rhodamine B) and antibiotics (tetracycline) over the obtained ZnO nanoparticles is investigated. The results indicated that ZnO nanoparticles obtained through calcination at 500 °C (ZnO500) exhibit more oxygen vacancies and superior piezo-photocatalytic activity. Under the simultaneous action of ultrasound and light for 40 min, its degradation efficiency and rate constant for Rhodamine B achieve 96.2 % and 0.094 min −1 , respectively, and the synergistic index of ultrasound and light is as high as 6.26. This high synergy is attributed to the piezoelectric polarization induced by ultrasound, which effectively promotes the separation of photo generated electrons and holes. Moreover, the introduction of oxygen vacancies increases the free carrier concentration in ZnO nanoparticles and generates more reactive species, thereby enhancing the piezo-photocatalytic activity of ZnO. Additionally, the 120 min degradation efficiency and rate constant of ZnO500 for tetracycline reach 93.3 % and 0.023 min −1 , respectively, demonstrating good versatility. This work demonstrates the application prospect of high-performance piezo-photo catalysts prepared by a simple method in the treatment of organic pollutants in water.
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2019
·
IF 1.411
Liyuan Zhang,Xiaoying Hu,Linlin Zhu,Xiaoqi Jin,Chao Feng
The water-dispersible ZnO/COFe2O4/graphene (ZnO/COFe2O4/GN-SO3H) nanocomposites were synthesized and applied as efficient photocatalyst for the organic dye degradation. The results indicate that the nanocomposites exhibited good water-dispersibility, convenient magnetic separation and high photocatalytic activity. Moreover, the novel photocatalysts could be repeatedly recycled for 15 consecutive trials without noticeable decrease in its effectiveness and have a great potential application in water treatment.
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MATERIALS RESEARCH BULLETIN
·
2023
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IF 5.4
Pu Mao,Congbin Zeng,Yongguang Guo,Gang Lu,Qingsong Yan,Zhiyong Liu,Bing Xie,Yingying Zhao,Kun Guo,Lixue Zhang
Tuning the electrical heterogeneity of CaCu 3 Ti 4 O 12 (CCTO) ceramic is extremely important to improve its properties. In this work, the CCTO ceramics with enhanced dielectric and nonlinear properties were obtained by the introduction of nano ZnO based on the electrical heterogeneity modulation strategy. As a result, all the CCTO-ZnO samples show the colossal dielectric constant of 10 4 –10 5 at room temperature. Meanwhile, the dielectric constant of CCTO-ZnO samples exhibits better stability in a wide frequency range from 10 1 Hz to 10 5 Hz and over a temperature scope of 30–210 °C. Most importantly, the x = 0.04 sample presents a relatively lower room-temperature dielectric loss of about 0.07 at 10 3 Hz. Furthermore, the breakdown field strength accompanied by the nonlinear coefficient of CCTO-ZnO ceramics is also improved. The enhancement of dielectric and nonlinear behaviors in these ceramics is mainly ascribed to the tunable electrical heterogeneity as per the internal barrier layer capacitor (IBLC) model.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yayun Zhang,Li Wang,Jie Yu,Han Yang,Guangxing Pan,Longfei Miao,Yonghai Song
Hierarchical ZnO-NiO nanosheets arrayed on three-dimensional macroporous carbon derived from kenaf stem (3D-KSCs) were constructed by thermal annealing the Zn-doped Ni-metal-organic frameworks grew on the 3D-KSCs for nonenzymatic glucose sensing. The prepared 3D-KSCs/hierarchical ZnO-NiO nanosheets were carefully characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and N 2 adsorption/desorption isotherms. The results showed that the existence of a small quantity of Zn was very important to control the morphology of hierarchical ZnO-NiO nanosheets . The porous structure of 3D-KSCs/hierarchical ZnO-NiO nanosheets enlarged the effective electrode surface area, and enhanced the electrical conductivity and mass transfer of nanocomposites greatly. The as-synthesized 3D-KSCs/hierarchical ZnO-NiO nanosheets was prepared into integrated electrode for nonenzymatic glucose detection, showing a wide linear range from 13 μM to 4.86 mM, a low detection limit of 4.12 μM, fast response time (<3 s) and good sensitivity (448.6 μA mM −1 cm −2 ). The good performances make the 3D-KSCs/hierarchical ZnO-NiO nanosheets be a promising nanocomposite material for electrochemical sensing of glucose.
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Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 20
·7272-7280
·
IF 0
Shuaishuai Ma,Jinjuan Xue,Yuming Zhou,Zewu Zhang
ZnO/Ag2O heterostructures were successfully synthesized via a simple one-step photochemical route. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). Photocatalytic activity toward degradation of a methylene blue (MB) aqueous solution under ultraviolet (UV) and visible light was investigated. The results showed that the as-prepared ZnO/Ag2O heterostructures significantly enhanced the UV and visible photocatalytic activity compared with pure ZnO and Ag2O. In particular, the rates of degradation using the as-prepared ZnO/Ag2O heterostructures were 27.4 and 15.6 times faster than that using bare ZnO nanoparticles under UV and visible light irradiation, respectively. Furthermore, the as-prepared ZnO/Ag2O heterostructures could be easily recycled in UV and visible photocatalytic applications due to the low concentration of surface defects. Moreover, the ZnO/Ag2O heterostructures could also degrade MB dye with high efficiency in various water types such as Changjiang river water, tap water, and deionized water, which will greatly promote their application in the area of environmental remediation.
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