APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiangjia Liu,Jin Li
In this study, a ZnO/NiS@NiO/rGO (ZNNG) composite was characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and scanning electron microscopy (SEM). Compared with simple ZnO, ZNNG exhibited stronger green emissions, but no ultraviolet (UV) emission peak was observed. Through a comprehensive analysis of ultraviolet–visible (UV–vis) absorption spectra, Mott Schottky (MS) plots, electron paramagnetic resonance (EPR) spectra, and X-ray photoelectron spectroscopy (XPS) results, it was proved that the stable green emissions of ZnO and its composites originated from the quenching of electrons between Zn interstitial ( Zn i ) and surface oxygen defects. The introduction of NiS@NiO caused the conduction band (CB) and valence band (VB) of ZnO to change to lower energy states, effectively increasing the absorption intensities of ZnO in the visible light, while introducing numerous oxygen-related defects on the surface of ZnO. Further addition of rGO effectively promoted the migration of electrons from the CB to the Fermi energy (E f ). These effects effectively increased the green emission of ZnO and reduced the UV emission. Finally, a proper mechanism for the near-zero band gap NiS@NiO/rGO that can significantly enhance the green emission of ZnO was proposed.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Junhao Cai,Zeng Chen,Shengjun Li,Shaokang Dong,Chaochao Wei,Fumin Li,Yaru Peng,Xiyang Jia,Weifeng Zhang
This study reported the fabrication of hierarchical ZnO NS-NR-structured films by the assembly of ZnO NRs (NRs) on ZnO nanosheets (NSs) by a hydrothermal method . The morphology of the as-prepared ZnO NS-NR films was affected by several factors, such as the TiO 2 intermediate layer, the concentration of Zn(CH 3 COO) 2 in the seed precursor solution, and the hydrothermal reaction time. ZnO NRs were vertically grown on the ZnO NSs under specific conditions. Such ZnO NS-NR films exhibited considerably higher light-scattering ability compared with that of the ZnO NS films. Quantum dot (QD)-sensitized solar cells were assembled using the CdS/CdSe QDs co-sensitized ZnO NS-NR films as the photoanodes. The growth of the ZnO NRs led to the improvement in the short-circuit current density from 12.4 mA cm −2 to 15.1 mA cm −2 . A high power conversion efficiency of 6.0% was obtained with (NH 4 ) 2 TiF 6 treatment for 4 min.
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Beibei Chen,Zhe Dong,Jiaye Li,Mengjie Zhang,Kan Zhang
Hexagonal boron nitride (h-BN) is a promising additive used in tribology ; however, its application is limited due to its poor interfacial combination with polymer matrices induced by its inert and smooth surface. In order to tackle this problem, an innovative ZnO nanowires-decorated h-BN hybrid was first prepared, which was then applied onto epoxy (EP) to enhance its tribological properties. The results demonstrated that ZnO nanowires were in-situ grown uniformly on the exterior of the hydroxylated h-BN, which strengthened the physical and chemical interaction between h-BN and EP, since the EP chains were prone to wrap around the ZnO nanowires. When the h-BN/ZnO content was 0.5 wt%, the friction coefficient and wear rate were decreased by 81.5% and 95.4%, respectively, and the corresponding composite coating possessed superior tribological properties under harsh conditions, which was mainly because of the synergistic reinforcing and lubricating effect between the ZnO nanowires and h-BN, as well as the good interfacial compatibility between h-BN/ZnO hybrid and EP. Moreover, the corresponding enhancement mechanisms of h-BN/ZnO were proposed.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 14
·H685
·
IF 3.12
Jun Feng,Yulu Tian,Otieno Kevin Okoth,Ling Cheng,Jingdong Zhang
Metal element doping is an effective way to tune visible light absorption ability and improve the charge carrier separation efficiency of a semiconductor. Herein, we studied the visible light photoelectrocatalytic property of ZnO doped with nickel (Ni-ZnO). The Ni-ZnO film was prepared by using a liquid phase deposition technique. Scanning electron microscopy analysis and X-ray diffraction measurement indicated that the as-prepared Ni-ZnO film comprised of many prismatic wurtzite nanoparticles. X-ray photoelectron spectroscopy analysis indicated that Ni2+ entered the ZnO lattice. Cyclic voltammetric analysis confirmed that Ni2+ in the ZnO lattice was electroactive and a pair of Ni2+/Ni3+ redox waves were observed. UV-visible diffuse reflectance and photoluminescence spectra showed that doping of Ni in ZnO improved the visible light utilization and separation of photogenerated charge carriers. The Ni-ZnO film subsequently exhibited a higher photocurrent than the ZnO film. The photoelectrocatalytic activity of the Ni-ZnO film was evaluated by the degradation of tetracycline under visible light illumination. The degradation rate constant for tetracycline on Ni-ZnO film was found to be 1.65 times higher than that of ZnO film.
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DOI
高影响因子
NANO
·
2019
·
IF 1.293
Chol-Nam Ri,Chol-Jun Kim,Song-Gol Kim,Myong-Hak Kim
The composite oxide additive containing Mn, Ni, Cr and Co elements for the ZnO varistor was successfully synthesized through the low-temperature combustion synthesis approach. The combustion reaction was carried out using nitrate mixtures of Mn, Ni, Cr and Co as oxidants and hydrazine as fuel. Herein, hydrazine acts as a bidentate bridge ligand, and it forms a complex with metal nitrate. Controlling the pH value of reactant solution by adding the hydrazine had a considerable effect on the combustion characteristics of the precursor and the final synthesized powder properties. The results of the XRD, FT-IR, SEM and TEM analysis indicated that the suitable pH value for synthesizing the composite additive powder with fine grain size and good crystallinity was 7. The precursor prepared at pH = 7 exhibited steady and slow combustion characteristics, and its yield rate achieved ca. 100%. With this method, the composite additive fine powder suitable for improvement of the electrical characteristics of ZnO varistor can be synthesized simultaneously on a large scale.
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高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 19
·6295-6305
·
IF 3.842
Wei Chen,Hong Ruan,Yin Hu,Danzhen Li,Zhixin Chen,Jiangjun Xian,Jing Chen,Xianzhi Fu,Yu Shao,Yi Zheng
We report here a facile one-step strategy to prepare hollow ZnO core/ZnS shell structures by microwave irradiation. The growth mechanism of the hollow core/shell structures was investigated in detail. ZnO truncated hexagonal pyramids first form on as-grown precursor flakes and then evolve into ZnO hexagonal twin crystals, which subsequently grow up and dissolve internally. The hollowing progress is firstly controlled by the Kirkendall effect and then undergoes an Ostwald ripening process. Hollow structures and the formation of ZnO/ZnS heterostructure bring enhanced photocatalytic activities to ZnO core/ZnS shell structures. The formed ZnO/ZnS heterostructures also fill the surface defects of ZnO crystals and improve the stability of the photocatalysts by overcoming the photocorrosion effect of a single ZnO photocatalyst under UV light irradiation. Superoxide radicals (O˙−2) are the key active species in the photocatalytic system of degradation of p-chlorophenol over hollow ZnO core/ZnS shell structures. The photocatalysis process has been discussed and a possible mechanism also has been proposed. This work is helpful to controllably construct other hollow core/shell structures, develop ZnO-based photocatalysts without photocorrosion effect and further study the photocatalytic mechanism of similar systems.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Cheng Yaru,Zhang Lianchen,Zhai Runlong,Ma Jialong,Teng Feng,Jiao Yang
Photoelectrochemical photodetector as the hot research topic in photodetection filed has attached many attentions, and enhancing its performance through adjusting the barrier at interfaces is an effective route. In this study, an Ag film was prepared between the ITO conductive glass and ZnO nanoparticles by an electrochemical deposition method. Compared with the original ZnO electrode, the photocurrent of the Ag/ZnO electrode increases from 0.101 to 0.171 mA cm −2 , and the light response increases from 379.9 to 720.8 μA W −1 . The inserted Ag layer changed the contact mode from Schottky to Ohmic contact, reducing the potential barrier of electron transport to the substrate. At the same time, due to the reflection of light by Ag layer, the absorbance of ZnO is increased. This simple combination helps to improve the detection performance of ZnO electrode and shows that this method can be used to prepare high-performance PEC photodetectors.
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产品关联
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 9
·2936
·
IF 3.5
Binbin Zhang,Wenhui Zhang,Wei Luo,Zhijie Liang,Yan Hong,Jianhui Li,Guoyun Zhou,Wei He
This study investigated the impact of zinc oxide’s (ZnO’s) morphology on the piezoelectric performance of polyvinylidene fluoride (PVDF) composites for flexible sensors. Rod-like (NR) and sheet-like (NS) ZnO nanoparticles were synthesized via hydrothermal methods and incorporated into PVDF through direct ink writing (DIW). The structural analyses confirmed the successful formation of wurtzite ZnO and enhanced β-phase content in the PVDF/ZnO composites. At a degree of 15 wt% loading, the ZnO-NS nanoparticles achieved the highest β-phase fraction (81.3%) in PVDF due to their high specific surface area, facilitating dipole alignment and strain-induced crystallization. The optimized PVDF/ZnO-NS-15 sensor demonstrated superior piezoelectric outputs (4.75 V, 140 mV/N sensitivity) under a 27 N force, outperforming its ZnO-NR counterparts (3.84 V, 100 mV/N). The cyclic tests revealed exceptional durability (<5% signal attenuation after 1000 impacts) and a rapid response (<100 ms). The application trials validated their real-time motion-monitoring capabilities, including finger joint flexion detection. This work highlights the morphology-dependent interfacial polarization as a critical factor for high-performance flexible sensors, offering a scalable DIW-based strategy for wearable electronics.
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wei Deng,Hai Zhang,Yingzheng Yin,Congwen Liu,Qing Liu,Jiajun Fang,Yushi Xie,Xiaoling Xu,Zuowan Zhou
Low-voltage electroporation offers a sustainable and energy-efficient approach for water disinfection. However, this technique faces significant challenges, including inefficient charge transport and inadequate stability of nanoarray-modified electrodes, which undermine both disinfection performance and system stability. In this study, we overcame these challenges by introducing iron-doped zinc oxide nanoarrays (Fe-ZnO NAs) and integrating them into a novel Non-contact Electrode System (NES). The Fe-ZnO NAs exhibited an enhanced conductivity due to the iron doping, which greatly improved their electroporation disinfection performance. At a low voltage of 1 V and a short contact time of 0.6 s, 3 wt% iron-doped ZnO nanoarrays (Fe3-ZnO NAs) electrodes achieved remarkable bacterial removal efficiencies of 6.20-log for Escherichia coli ( E. coli ) and 1.69-log for Staphylococcus aureus ( S. aureus ), compared with only 1.94-log and less than 0.10-log, respectively, for the undoped ZnO NAs electrodes. Furthermore, the Fe3-ZnO NAs electrodes demonstrated excellent operational stability, maintaining over 6.00-log removal efficiency for E. coli during 30 min of continuous operation. These results establish the transformative potential of Fe-ZnO NAs as a high-performance, low-energy electrode material, offering a practical and efficient solution for water disinfection in real-world applications.
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产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2025
·
IF 2.1
Yanbing Yin,Chunxin Li,Zhou Wang,Yongming Feng,Bei Jiang,Yifei Li,Wei Yang
The nitrocopper phthalocyanine-loaded zinc oxide nanocomposites (CuTNPc/ZnO) were synthesized using the impregnated method. Subsequently, they were systematically characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and N2 adsorption-desorption. The synthesized catalysts were applied to the photocatalytic degradation of methylene blue dye under visible light, and it was discovered that after 150 min of visible light exposure, the composite CuTNPc/ZnO-0.5 exhibited the best degradation. The synthesized CuTNPc/ZnO composites significantly enhanced the photocatalytic degradation of methylene blue with an efficiency of 88.97% compared to CuTNPc or ZnO, respectively. The synergistic effect of CuTNPc and ZnO improved the efficiency of light utilization. The catalytic activity of the central ions and the large specific surface area of the composites accelerated the charge transport and reduced the charge complexation. The potential of nanocomposites CuTNPc/ZnO-0.5 in the area of industrial waste dye degradation is thus confirmed by this investigation. A new strategy for photocatalytic degradation was provided by preparing ZnO-based composite catalysts.
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Fang Wang,Zhe Chen,Zhenzhou Zhu,Jia Guo
Antibiotics in pharmaceutical and aquaculture wastewater is a growing threat to the environment of world, due to the induction of drug-resistant bacteria and the harm to the aquatic organisms. Photocatalytic membrane, which has immobilized photocatalyst on membrane is an effective and environmentally friendly technology for antibiotics degradation. In this study, a novel photocatalytic membrane was prepared by loading ZnO/N-g-C 3 N 4 composite on commercial polymer membrane with glutaraldehyde as a crosslinker through pressure driven filtration. The loading of the photocatalyst over the membranes was validated by Fourier transform infrared spectroscopy, scanning electron microscope and X-ray photoelectron spectroscopy. The photocatalytic properties of ZnO/N-g-C 3 N 4 composite membrane were observed efficient for degradation of tetracycline, ciprofloxacin and ofloxacin in both immersion and filtration model under visible light (λ > 420 nm). Especially, a ZnO/N-g-C 3 N 4 loading amount of 1.12 g/cm 2 and glutaraldehyde concentration of 45% led to the degradation rate of 100% and 80% for tetracycline at 5 mg/L and 10 mg/L, respectively. Low trans-membrane pressure (0.005 MPa) and narrow membrane size (50 kDa) were favorable for antibiotics degradation in filtration model due to long reaction time on membrane surface. Construction and performance of ZnO/N-g-C 3 N 4 composite membrane might provide new strategy for energy saving wastewater treatment.
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高影响因子
Nanoscale Research Letters
·
2022
·Vol. 17
·期 1
·1-11
·
IF 5.418
Kadir Aygul,Jamal Ruxangul,Abdiryim Tursun,Liu Xiong,Zhang Hujun,Serkjan Nawrzhan,Zou Dongna,Liu Ya jun
In this work, we successfully assembled an organic–inorganic core–shell hybrid p-n heterojunction ultraviolet photodetector by the electropolymerization deposition of poly(3,4-ethylenedioxyselenophene) (PEDOS) on the surface of zinc oxide nanoarrays (ZnO NRs). The structures of composite were confirmed by FTIR, UV–Vis, XRD and XPS. Mott–Schottky analysis was used to study the p-n heterojunction structure. The photodetection properties of ZnO NRs/PEDOS heterojunction ultraviolet photodetector were systematically investigated current–voltage (I–V) and current–time (I–t) analysis under different bias voltages. The results showed that PEDOS films uniformly grew on ZnO NRs surface and core–shell structure was formed. The p-n heterojunction structure was formed with strong built-in electric field between ZnO NRs and PEDOS. Under the irradiation of UV light, the device showed a good rectification behavior. The responsivity, detection rate and the external quantum efficiency of the ultraviolet photodetector reached to 247.7 A/W, 3.41 × 10 12 Jones and 84,000% at 2 V bias, respectively. The rise time ( τ r ) and fall time ( τ f ) of ZnO NRs/PEDOS UV photodetector were obviously shortened compared to ZnO UV photodetector. The results show that the introduction of PEDOS effectively improves the performance of the UV photodetector.
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高影响因子
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