Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 33
·19442-19452
·
IF 10.733
Linsheng Tang,Rui Zhang,Xinyue Zhang,Naiqin Zhao,Chunsheng Shi,Enzuo Liu,Liying Ma,Jiayan Luo,Chunnian He
Lithium metal anodes have attracted considerable attention due to their high specific capacity (3860 mA h g−1). However, the volume change and the lithium dendritic growth of Li metal anodes impede their practical application. Researchers have improved the performance of lithium metal anodes by loading lithiophilic materials on 3D current collectors as lithium hosts. Nevertheless, the lithiophilic materials without spatial confinement may undergo severe volume and location changes during the cycling, leading to inhomogeneous lithium deposition, decayed structural stability and electrochemical performance. Herein, lithiophilic ZnO nanoparticle confined 3D porous carbon composite microspheres (3D ZnO@PCCMs) as hosts for lithium metal anodes were developed through a facile and scalable in situ strategy to mitigate the above formidable problems. The microsphere consists of several tens of interconnected empty carbon nanoboxes with ultra-small ZnO nanocrystals embedded in-plane. In the constructed architecture, the ZnO nanoparticles confined within ultrathin carbon walls can effectively prevent the ZnO from agglomerating and detaching from the current collectors during the cycling, inducing the uniform distribution and structural stability of ZnO for guiding the long-term homogenous lithium deposition, while the abundant interconnected empty boxes can sustain massive lithium deposition and accommodate the volume expansion of lithium during cycling. As a result, the as-obtained electrode with ZnO@PCCMs as a 3D host can achieve a very high coulombic efficiency, durability and stability even at high current density and areal capacity. This work delivers a novel concept that stabilizing the lithiophilic seeds can lead to a more stable and excellent cycling performance for lithium metal anodes, and meanwhile provides a low-cost and industrialized manufacturing approach for high-safety and high-performance lithium metal anodes.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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电池技术
·
界面工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zui Tao,Hewei Si,Xidong Zhang,Jianjun Liao,Shiwei Lin
A highly sensitive and selective sensor is urgently needed in many practical H 2 O 2 detection, such as water quality monitoring, quality control of food products, and so on. However, the traditional three electrode system limits its further development in recent years due to its difficulty in miniaturization and integration. To effectively improve its sensitivity and selectivity, highly-ordered TiO 2 nanotube arrays (TNTAs) are modified with Pt nanoparticles and Prussian blue (PB) nanotubes and creatively combines with thin-film transistor (TFT) based on ZnO to prepare an electrochemical sensor . The sensor uses PBNCs as recognition units for the specific detection of H 2 O 2, and the generated electrical signal is amplified by TFT. Thus, a highly sensitive and selective H 2 O 2 sensor is achieved. The detection limit of the sensor is as low as 5.19 nM, which is three orders of magnitude lower than the conventional electrochemical detection methods using the same electrode. The sensor also possesses wider linear detection range of 0.1–50 μM and 50 μM–5 mM comparable to that of other reported H 2 O 2 sensors. Besides, the sensor has good selectivity for H 2 O 2 in the presence of common interferences such as ascorbic acid , uric acid , glucose, and dopamine. Furthermore, the device presents good reproducibility and exhibits good long-term stability over 27 days of continuous measurement. This study offers important insights for the rational design of sensors with high sensitivity and selectivity.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Pingfan Du,Lixin Song,Jie Xiong,Ni Li,Zhenqiang Xi,Longcheng Wang,Dalai Jin,Shaoyi Guo,Yongfeng Yuan
Novel TiO 2 /ZnO core–sheath nanofibers (NFs) film was fabricated through an extraordinary coaxial electrospinning technique . Dye-sensitized solar cells (DSSCs) were assembled using the TiO 2 /ZnO NFs film as photoanode . FESEM , TEM, FTIR , XRD , XPS and UV–vis were used to characterize the NFs electrode film. Photocurrent–voltage ( I – V ) characteristic, incident photo-to-current conversion efficiency (IPCE) spectrum, and electrochemical impedance spectroscopy (EIS) measurements were performed to evaluate the DSSCs performance. The results reveal that the DSSCs based on the TiO 2 /ZnO core–sheath NFs are superior to their bare TiO 2 NFs-based counterparts. Compared with the latter, the overall energy conversion efficiency was enhanced from 4.47 to 5.17%. And the possible mechanism for this enhancement was discussed.
研究领域:
材料科学
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纳米技术
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能源材料
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光电化学
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半导体薄膜
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-13
·
IF 3.159
Tong Yanhua,Lai Shilian,Wu Fan,Guo Yuhua,Chen Haifeng,Pan Guoxiang,Sun Jingwei
ZnO porous nanosheets (PNSs) with partial surface modification were fabricated by means of depositing amorphous BiVO 4 on basic zinc carbonate nanosheets followed by calcining at 500 °C. At low levels of anchored amorphous BiVO 4 , the surface of ZnO PNSs was partially evolved into Bi 3.9 Zn 0.4 V 1.7 O 10.5 (BZVO). The measurements for photocurrent and photoluminescence demonstrate that partial-surface BZVO-modified ZnO PNSs (ZB_0.01) could significantly inhibit the recombination of photoinduced carriers. This should be ascribable to the driving from surface potential difference produced by non-junction part and vertical p-n BZVO/ZnO junction part on the surface of ZB_0.01. Furthermore, the photocatalytic efficiency in degradation of reactive brilliant red for ZB_0.01 under weak solar irradiation is about 8 times higher than that under strong visible-light illumination. The discussion regarding reasons for this enhancement demonstrates that each component in photocatalysts having rational valence-band maximum and conduction-band minimum energy levels is essential to obtain high-activity sunlight-driven catalysts.
研究领域:
材料科学
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纳米技术
·
光催化
·
太阳能
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Li Chen,Liu-Xin Cai,Jing Geng,Chen-Chen Liu,Yue Wang,Zheng Guo
One-dimensional (1D) semiconductor composite nanofibers (NFs) with large specific surface areas , high length-to-diameter ratios, and abundant interfacial active sites have received widespread attention. In this work, a rationally designed 1D composite NFs architecture for detecting acetone is synthesized via a two-step process based on electrospinning followed by a thermal oxidation method. Utilizing the polyoxometalate (POM) as a molecular platform with high negative charges to combine transition metal ions precursors, highly dispersed ZnMoO 4 can be in situ grown on the ZnO. By adjusting the content of POM (H 3 PMo 12 O 40 , denoted as PMo 12 ) in the precursor solution , we can obtain a series of ZnMoO 4 decorated ZnO NFs (ZnMoO 4 -ZnO NFs). Compared with the pristine ZnO NFs, the ZnMoO 4 -ZnO NFs sensor exhibited excellent sensing characteristics over a wide range of acetone concentrations (50 ppb-50 ppm), such as high sensitivity , relatively low detection concentration, and high selectivity . The primary mechanism for the improved acetone gas sensing properties of the ZnMoO 4 -ZnO NFs could be ascribed to the available charge transfer and unique structure within ZnMoO 4 -ZnO NFs.
研究领域:
材料科学
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纳米科技
·
传感器技术
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半导体物理
·
环境监测
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Sefiu Abolaji Rasaki,Chunlei Zhao,Rui Wang,Jiacheng Wang,Heng Jiang,Minghui Yang
In this work, Ag/ZnO nanorods are prepared via simple and cost-saving liquid precipitation citrate reduction process (LPCR). The system shows appreciable catalytic activity for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) wherein NaBH 4 is used as electron sacrificer at ambience. It is found out that ZnO nanorods can effectively prevent Ag NPs agglomeration; a problem normally reduces active sites density. The coupling effect between the Ag NPs and ZnO greatly enhances electron transfer rate. This gives rise to high reduction rate constant ( k app ) of ˜3.97 × 10 −3 s −1 for the catalytic reduction of 4-NP. The result is about 1.9times better than that of Ag NPs (2.07 × 10 −3 s −1 ). The k app is well fitted into pseudo-first order kinetics with high correlation coefficient (R 2 ) of about 0.994, indicating chemisorptive reduction process. The remarkable performance obtained here is attributed to strong coupling effect between Ag NPs and ZnO nanorods derived from LPCR synthesis method.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Afang Zhu,Tianhui Jiao,Shujat Ali,Yi Xu,Qin Ouyang,Quansheng Chen
Aflatoxins (AFs) contaminate agricultural products in a wide range of ways during their harvesting, storage and transport. Therefore, the detection of AFs has certain practical significance. Herein, a dispersive micro solid phase extraction (D-µSPE) technology was constructed based on 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF 6 ]) fabricated ZnO nanoflowers for AFs extraction from food matrix before HPLC procedure. The key parameters affecting the extraction efficiency were studied. Under optimal experimental conditions, the method showed excellent linearity with high correlation coefficients (≥0.994). LOD and LOQ were 0.034 and 0.114 μg/kg for AFB1, 0.024 and 0.082 μg/kg for AFB2, 0.067 and 0.226 μg/kg for AFG1 and 0.025 and 0.084 μg/kg for AFG2. The recovery of actual samples spiked with analytes (at 5, 15 and 20 μg/kg) were from 93.8 to 105.1%. Overall, an accurate AFs analysis method was developed and could be applied to the determination of AFs in various food and agricultural products.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Mengfeifei Jin,Weijie Zhou,Wenqiang Ma,Qin Wang,Xiaojuan Liang,Peiqing Zhang,Weidong Xiang
In the era of big data, the large amount of data generated every second requires modern and advanced data storage technologies. Femtosecond (fs) laser induced crystallization allow for the realization of fixed-point crystallization inside the CsPbBr 3 nanocrystals glasses (CPB), which can be applied in data storage. However, CPB is prone to self-crystallization prior to further heat treatment, interfering with fs-induced crystallization inside the glass and seriously hindering its application in data storage. Herein, we first propose the inhibition of CPB from self-crystallization by modulating the content of ZnO (4–20 mol%) using a melt-quenching method. ZnO was employed as a network modifier and was closely related to the glass network structure. When the content of ZnO was 4%, the CPB did not self-crystallize and was colorless. It was applied in the rewritable data storage by combining the 800 nm fs laser-induced crystallization, annealing (460 ℃/0.5 h) and fs laser erasing (20 mW). This work demonstrates a simple and efficient way to control the self-crystallization of CPBs, enhancing their potential practical application in high-capacity optical data storage with ultra-long working lifetimes.
研究领域:
材料科学
·
光学工程
·
信息存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 8
·1-9
·
IF 2.8
Peng Yanyan,Jiang Dayong,Zhao Man
The recent trend of combining perovskite with other materials to enhance optoelectronic performance has garnered significant interest. In this paper, MAPb 0.9 Sn 0.1 I 3 and ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector were prepared by frequency magnetron sputtering and sol–gel spin-coating method. Hybrid heterojunction photodetectors have more beneficial optoelectronic performance compared to MAPb 0.9 Sn 0.1 I 3 photodetector, due to the presence of built-in electric fields, which can suppress the recombination of electrons and holes. At 7 V bias conditions, the responsivities of MAPb 0.9 Sn 0.1 I 3 photodetector were 0.022 and 0.015 A/W, and the responsivities of ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector were 0.39 and 0.99 A/W obtained under 350 and 850 nm illumination, respectively. The maximum external quantum efficiency reaches 144.47%, the detection rate was 5.53 × 10 11 Jones and the light to dark ratio was 2.95 × 10 3 of ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector. This study provides a basis for the preparation of perovskite heterojunction photodetectors with high optoelectronic performance. High performance UV–vis–NIR photodetectors based on ZnO/organic–inorganic hybrid Sn–Pb hybrid perovskite heterojunction.
研究领域:
材料科学
·
光电子学
·
半导体物理
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Huiyu Su,Hao Li,Heng Lin,Xiaowen Shi,Yumin Du,Yan Luo,Hongbing Deng
An innovative formaldehyde sensor based on CuO/ZnO composite nanofibrous mats (C-NFMs) coated quartz crystal microbalance (QCM), which is capable of stable determination of formaldehyde gas at ambient temperatures sensitively and selectively, has been successfully fabricated. Triaxial and highly porous C-NFMs with high surface area (126.53 m 2 g −1 ) were synthesized by electrospinning a sol-gel cellulose acetate (CA)/CuAc 2 /ZnAc 2 complex solution and following by calcination process. Benefiting from the unique heterojunction structure, immense pore interconnectivity and large surface area of C-NFMs, the as-developed QCM sensors exhibited an extremely low limit of detection (LOD) down to 26 ppb and a limit of quantification value equals to 87 ppb. Besides, the C-NFMs coated QCM sensors also demonstrated short response times (80s), the long-term stability during 3 weeks as well as good selectivity to formaldehyde over diverse volatile organic compounds. The sorption equilibrium in the adsorption process of QCM coated sensors was well met with the Freundlich model, which certified the heterogeneous adsorption between formaldehyde gas and C-NFMs.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Bing Zhang,Hongyun Meng,Xue Wang,Jing Li,Honghong Chang,Wenlong Wei
Herein we designed a novel photoelectrochemical sensing platform based on Fe 3+ doped ZnO-Ag photocatalyst (Fe 3+ /ZnO-Ag) for ultrasensitive Hg 2+ detection by using exonuclease III-assisted target recycling and DNAzyme-catalyzed amplification. Firstly, Fe 3+ /ZnO-Ag was synthesized to provide photocurrent under visible light irradiation. Secondly, target Hg 2+ was determined by hairpin DNA probes on the Fe 3+ /ZnO-Ag modified ITO based on T-Hg 2+ -T, and then Hg 2+ was released by the digestion of exonuclease III to double-stranded DNA. Finally, the photocurrent markedly decreased due to catalysis of hemin/G-quadruplex toward 4-chloro-1-naphthol. Under optimal conditions, the photocurrents were linearly related to Hg 2+ concentrations form 0. 5 nM to 100 nM with a detection limit of 0. 1 nM at the 3 S blank criterion. More importantly, the developed biosensor exhibited good selectivity, repeatability, and stability, meanwhile, this analysis platform held great potential for testing real water samples in future.
研究领域:
环境科学
·
分析化学
·
纳米技术
✓ 已验证
DOI
高影响因子
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
研究领域:
催化
·
环境化学
·
材料科学
·
绿色化学
·
能量转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）