ACS Applied Nano Materials
·
2025
·
IF 5.5
Qinghuan Gao,Shuai Han,Minxing Zhao,Yanping Song,Zhao li,Jun Kang,Na Hong,Shihao Wang,Shichang Wang,Zhiyuan Yang,Yongfeng Wang,Nian Li,Zhenyang Wang
The growing demand for advanced energy storage systems has intensified the exploration of materials for supercapacitors (SCs). Zeolitic imidazolate frameworks (ZIFs) and their derivatives have emerged as promising candidates due to their unique structural and performance characteristics. This study demonstrates a laser-induced method for synthesizing ZnO/graphene composites with a porous structure derived from dopamine-coated ZIF-8. The simultaneous laser-induced carbonization of dopamine to form graphene and decomposition of ZIF-8 to generate ZnO resulted in a synergistic porous structure, significantly enhancing the charge transport ability and electrochemical performance of the ZnO/graphene composite. Following optimization, the ZnO/graphene composite electrode (ZPL-9) achieved a high specific capacitance of 331.8 mF cm–2 at a current density of 1 mA cm–2. Furthermore, the electrode retained 87% of its capacitance after 10,000 cycles at 5 mA cm–2, highlighting its robust cycle stability. A button-type symmetric SC was successfully assembled using the ZPL-9 electrode, achieving an energy density of 5.2 μWh cm–2 at a power density of 299.04 μW cm–2. The study not only provides insights into the application of MOF-based materials in energy storage but also demonstrates the potential of laser-induced methods for synthesizing high-performance electrode materials.
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DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 12
·1439
·
IF 2.8
Yumeng Zhang,Chao Gu,Hong Li,Dechuan Li
Au–ZnO heterogeneous nanoparticles (NPs) were successfully synthesized, and the intrinsic correlation between their spectral evolution and interfacial growth mechanism was systematically elucidated. With increasing Au content, the SPR absorption peak of Au exhibits a pronounced red shift, while the defect-related emission of ZnO is suppressed and the band-edge emission becomes broadened. These spectral variations are closely coupled with the interfacial growth process. Interfacial electron transfer and the formation of a Schottky barrier induce charge redistribution within ZnO and reduce oxygen vacancies, enabling ZnO to preferentially nucleate on the Au surface and subsequently evolve into a pyramidal structure. The resulting morphological transformation further enhances electron depletion and plasmonic coupling, lowering the effective plasmonic energy of Au and deepening the SPR red shift. Quantitative analysis based on Mie theory shows that approximately 12% of the free electrons in Au participate in interfacial transfer, confirming the cooperative role of strong electronic coupling in governing both growth dynamics and optical responses. This study provides deeper insight into the photophysical mechanisms of Au–ZnO heteronanocrystals and offers guidance for designing noble metal–semiconductor composites with tunable optoelectronic properties.
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DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 7
·1995
·
IF 3.5
Jianhua Zhang,Yunbo Shi,Bolun Tang,Canda Zheng
This paper presents a ZnO-Pt/Ru sensor prepared by a two-step hydrothermal method with in situ-grown ZnO nanorods and doped with Pt and Ru elements by immersion sintering. Characterization results showed that Pt and Ru were successfully modified on the surface of ZnO nanorods. ZnO-Pt/Ru achieved a response of 25–50 ppm H 2 S at the optimum operating temperature of 198 °C. In addition, the lower limit of H 2 S detection of ZnO-Pt/Ru reached 50 ppb with a response of about 10%, indicating a wide concentration detection range. Due to the good catalytic properties of Pt, the recovery characteristics of ZnO at high concentrations of H 2 S were significantly improved. The response time of ZnO-Pt/Ru (30 s) was also significantly shorter than pristine ZnO (56 s), with excellent selectivity. As far as the gas-sensitive enhancement mechanism is concerned, at the macroscopic level, the ZnO surface was modified by Pt and Ru, and this special structure of ZnO-Pt/Ru significantly increased the specific surface area. At the microscopic level, the PN junction formed between Pt/Ru and ZnO provided abundant holes for electron migration.
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PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2016
·Vol. 5
·期 5
·R74
·
IF 1.65
Lei Wang,Lu Feng,Chuansheng Cui,Shuling Xu,Jifeng Liu,Xiuyu Sun,Xuexi Gao,Wenjun Wang
In this work, ZnO nanorods were prepared and functionalized with two different alkanethiols. Fourier transform infrared spectra, X-ray photoelectron spectra, thermogravimetric analysis/ differential scanning calorimetry measurements and Raman spectra were applied to characterize the surface composition of functionalized ZnO nanorods. Photoluminescence spectra analyses were applied to characterize the optical properties of the functionalized ZnO nanorods. Electrochemiluminescence measurements were used to investigate the influence of surface functionalization to the surface conductivity and emission property of ZnO nanorods. The results indicated that the length of alkyl chains in the functional thiol moiety can influence the electrochemiluminescence intensity and the maximum peak position of electrochemiluminescence spectrum of functionalized ZnO nanorods, the variation of electrochemiluminescence properties can be attributed to the increase of electrical resistance of ZnO nanorods and the changes of surface states that are related to the specific hole trap sites and the shallow electron levels.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 1
·91-101
·
IF 1.638
Yan Yi,Yang Shuai,Jiang Feng,Luo Yuwei,Gao Hejun,Liao Yunwen
The sheet-like adsorbent of the eggshell wastes was prepared by the thermal hydrolysis method. The structure of the adsorbent was characterized by scanning electron microscope, Brunauer-Emmett-Teller, X-ray diffraction, transmission electron microscope, and X-ray photoelectron spectrometer. The adsorption capacity was investigated in a Pb 2+ solution. The effects of initial pH, salt concentration, contact time, and adsorbate concentration on the adsorption of lead ions were investigated in detail. The morphology of the adsorbent was sheet-like microspheres. Zinc selenide/zinc oxide could be uniformly loaded onto the eggshell waste surface, which could effectively enhance the specific surface area of the eggshell wastes. The adsorption kinetics and isotherm followed the pseudo-second-order and Langmuir–Freundlich isotherm model, respectively. The synthesized adsorbent showed a maximum lead adsorption capacity of 1,428.78 mg/g at room temperature. Ion-exchange was the main adsorption mechanism.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 111
·110349-110355
·
IF 3.289
Bolin Liu,Yangguang You,Haifei Zhang,Hao Wu,Junsu Jin,Hongtao Liu
Zinc oxide (ZnO) nano-powders were prepared by a simple PVA-assisted freeze-drying process. Porous materials were firstly prepared by freeze-drying of polyvinyl alcohol (PVA) and zinc nitrate aqueous solutions with different mass ratios, and then calcined to produce ZnO nano-powders directly. PVA was applied as a polymeric carrier and its interaction with zinc nitrate was investigated for its effects on the morphology of the obtained ZnO nano-powders. The PVA/Zn(NO3)2 foams were analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and scanning electron microscopy (SEM). The obtained ZnO nano-powders were also characterized using various techniques and were evaluated as photocatalysts for dye degradation.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yan Ziyang,Wu Angxuan,Wang Xilin,Huang Rongxia,Yan Nianping,Jia Zhidong,Wang Liming
In this paper, ZnO was used as a sintering aid as well as reactant in the reactive flash sintering (RFS) of zinc-containing ceramic materials at room temperature (25 °C). The RFS of ZnO-based ceramics, both ZnAl 2 O 4 and Zn 2 TiO 4 , were achieved with the application of a high electric field. Contrary to previous reports, the RFS of ZnAl 2 O 4 was divided into two stages according to temperature changes, and the effect of the reaction exotherm on the RFS was presented for the first time in this paper. In addition, the RFS produced a larger grain size of ZnAl 2 O 4 than conventional sintering did.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 2
·484-498
·
IF 1.915
You Zhaoyang,Zhao Changrong,Sun Yongjun,Zhuang Chang
To cope with the increasingly severe challenges of zinc oxide nanoparticles (ZnO-NPs) in the field of the aquatic environment, this paper uses poly-aluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) as coagulants to enhance the removal of ZnO-NPs from water. In two environments (pure-water environment and kaolin environment) that simulate suspended solids, we studied the dosage, pH, precipitation time, and hydraulic power of ZnO-NPs at three different initial concentrations (1, 2, and 30 mg/L). The effects of various conditions on the performance of PAFC, CPAM, and PAFC/CPAM to remove ZnO-NPs were examined. Results showed that the overall removal rate of ZnO-NPs in the kaolin environment was slightly higher than that in the pure-water environment. In contrast the removal rate of ZnO-NPs in the PAFC/CPAM was significantly higher than that of PAFC or CPAM alone. The coagulation removal conditions of ZnO-NPs were optimized using a response-surface model. Under the best conditions, the removal rate of ZnO-NPs with an initial mass concentration of 30 mg/L in the PAFC/CPAM combination in pure-water and kaolin environments was 98.54% and 99.17%, respectively. Finally, by studying the changes in floc size during coagulation, enhanced coagulation was an efficient method of removing ZnO-NPs from water. The combination of PAFC and CPAM can efficiently remove ZnO-NPs. Kaolin can promote the removal efficiency of ZnO-NPs. The RSM model can reflect the optimal removal conditions for coagulation to remove ZnO-NPs. CPAM can further increase the particle size and compactness of ZnO-NPs flocs after coagulation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaohong Ma,Danyang Li,Yuheng Jiang,Huacheng Jin,Liuyang Bai,Jian Qi,Feifei You,Fangli Yuan
Utilizing solar energy to convert carbon dioxide (CO 2 ) into chemical fuels could simultaneously mitigate the greenhouse effect and fossil fuel crisis. Herein, a heterogeneous photocatalyst of ZnO nanofiber deposited by Pt nanoparticles was successfully synthesized toward photocatalytic CO 2 reduction via radio-frequency thermal plasma and photo-deposition method. The Pt nanoparticles were introduced on the surface of ZnO nanofibers to broaden the light absorption and utilization, increase the additional reaction active sites and facilitate the separation of photo-generated electron/hole pairs. Combined with the natural advantages of short transfer path of charge carriers and self-support effecting in humid reaction environment for nanofibers, the Pt/ZnO hetero-junction nanocomposites displayed superior photocatalytic activity for CO 2 reduction with respect to bare ZnO nanofibers, affording a CO-production rate as high as 45.76 μmol g −1 h −1 under 300 W Xe lamp irradiation within a gas–solid reaction system. Furthermore, in-suit Fourier transform infrared (FTIR) spectra were applied to unveil the details during photocatalytic CO 2 reduction. This work presents a hetero-junction nanocomposite photocatalyst based on eco-friendly semiconductor and metal materials.
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高影响因子
CRYSTENGCOMM
·
2017
·Vol. 20
·期 5
·556-562
·
IF 3.474
Song Jiang,Binghui Ge,Bojia Xu,Qinggang Wang,Baobao Cao
SnO2(ZnO:Sn)m is a recently reported new phase in the ZnO–SnO2 binary system with a naturally grown superlattice structure, which is currently only found in the form of one-dimensional nanowires. Difficulties in high-purity synthesis and orientation control have hindered further investigations into its potential unique physical properties. Here, we present a novel growth design of fabricating ZnO/SnO2(ZnO:Sn)m binary/superlattice heterojunction nanowire arrays by one-batch chemical vapor deposition to explore the rational growth mechanism of SnO2(ZnO:Sn)m superlattice nanostructures. The morphology, chemical composition and crystal structure of the as-prepared products were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy and Cs-corrected scanning transmission electron microscopy. It is revealed that the SnO2(ZnO:Sn)m superlattice section epitaxially grows on top of the ZnO nanowire along the [0001] direction, following the orientation relationships [10]Au//[110]ZnO/SnO2(ZnO:Sn)m and (111)Au//(0002)ZnO/SnO2(ZnO:Sn)m. The Au catalysts on the pre-grown ZnO nanowires play a key role in absorbing further loading of Zn/Sn vapor, inducing the formation of the SnO2(ZnO:Sn)m superlattice on the basal plane of ZnO, at the same time, avoiding the appearance of Sn-rich impurity phases. Photoluminescence measurements display a red shift of the ultraviolet (UV) emission peak from 381 nm to 386 nm and an extra peak at 470 nm, compared with the ZnO reference. This study would shed light on the rational growth of natural oxide superlattice nanowire arrays and complex axial heterojunction nanostructures.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 11
·7068-7075
·
IF 1.676
Li Shuhui,Zhou Ying,Cui Lijun,Ge Zhenhua,Feng Jing
In 2 O 3 (ZnO) k superlattice ceramics are promising oxide thermoelectric materials, as superlattice interfaces are effective in scattering phonons and filtering low-energy electrons to decrease thermal conductivity and improve the figure of merit ( ZT ) value. In this work, homologous compounds were prepared by solid-state reaction method using ZnO and In 2 O 3 as raw materials. Phase purity and crystal structure were characterized by x-ray diffraction, revealing that In 2 O 3 (ZnO) k crystallizes in an R3 m space group for odd k values and P6 3 /mmc for even k values. The study of thermoelectric (TE) properties showed that as k increased, the thickness of InO(ZnO)
+ 3
also increased, while the electrical conductivity, thermal conductivity, Seebeck coefficient, power factor and ZT value were all decreased. In 2 O 3 (ZnO) 3 samples obtained a maximum power factor of 651 μ W m −1 K −2 at 973 K, and also achieved a maximum ZT value of 0.24 at 973 K.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yiqun Zhang,Chong Wang,Fengmin Liu,Xiaoying Sun,Xinhao Guo,Lianjing Zhao,Geyu Lu
In recent years, researchers have discovered that self-assembled monolayer functionalized surfaces could improve the gas-sensing performance of semiconductor oxide-based sensors. In the present work, metal-organic framework material ZIF-8 was selected as the self-sacrificial template, and then ZIF-8 materials were calcined at a high temperature to obtain ZnO nanoparticles . Subsequently, the surface of ZnO was modified to install a single layer of 3-aminopropyltriethoxysilane (APTES). In comparison with the pure ZnO-based sensor, the sensor based on 0.5 vol% APTES/ZnO had higher response to 2-butanone. The response has remarkably improved mainly due to APTES molecules capture electrons from the surface of ZnO to widen the electron depletion layer . In addition, the amine (–NH 2 ) group of the APTES monolayer enhanced the specific interaction between the sensing material and 2-butanone, thereby the performance of the sensor was improved. After functionalization with 0.5 vol% APTES, the lower detection limit of the sensor reached as low as 200 ppb, while that of the pure ZnO-based sensor was 500 ppb.
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高影响因子
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