JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2010
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IF 2.338
Yanling Zhai,Shengyong Zhai,Guifen Chen,Ke Zhang,Qiaoli Yue,Lei Wang,Jifeng Liu,Jianbo Jia
An amperometric glucose biosensor based on the direct electron transfer (DET) of glucose oxidase (GOx) was developed and the enhanced catalytic current in presence of substrate was used to quantify glucose. GOx was adsorbed onto nanostructured ZnO modified indium tin oxide (ITO) electrodes. The goal of this work was to study the effects of morphology of nanostructured ZnO on DET of GOx and the sensor’s analytical properties. Nanostructured ZnO materials including nanorods (NRs) and nanoplates (NPs) were electrochemical deposited onto ITO and were characterized using scanning electron microscopy and X-ray diffraction. Through adjusting the precursor of Zn ions , electrolytes and controlling deposition charge ( Q , in Coulomb, C), different nanostructured ZnO with different size, shape and deposition density were obtained. GOx was adsorbed onto nanostructured ZnO via layer-by-layer assembling to form GOx and polylectrolyte multilayer films . Compared to bare ITO or ITO deposited with nanostructured ZnO with other morphologies, GOx immobilized onto ZnO NRs arrays ( Q = 0.1 C) gave higher current signals, exhibited reversible DET ( k s , 2.16 s −1 ), wide linear range (from 0.1 to 9 mM) with the limit of detection of 1.94 μM and low apparent Michaelis–Menten constant ( K Mapp, 3.12 mM).
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高影响因子
Materials
·
2019
·Vol. 12
·期 8
·1215
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IF 2.972
Xu Zhang,Qing Li,Shikai Yan,Wei Lei,Jing Chen,Khan Qasim
Taking advantage of a large light absorption coefficient, long charge carrier diffusion length and low-cost solution processing, all-inorganic halides perovskite CsPbBr3quantum dots (QDs) are combined with a ZnO QD film to construct a high-performance photodetector. In this work, a novel photodetector device based on transistor structure with dual active layers composed of CsPbBr3and ZnO film is proposed. In this structure, CsPbBr3film functions as the light-absorbing layer and ZnO film acts as the conducting layer. Owing to the high electron mobility and hole-blocking nature of the ZnO QDs film, the photo-induced electron-hole pairs can be separated efficiently. As a result, the device exhibits high performance with response of 43.5 A/W, high detection up to 5.02 × 1011Jones and on/off ratio of 5.6 × 104under 365 nm light illumination. Compared with the ZnO-only phototransistor (the photodetector with the structure of transistor) the performance of the CsPbBr3phototransistor showed significant improvement, which is superior to the majority of photodetectors prepared by perovskite. This work demonstrates that the ZnO QDs film can be applied in the photodetector device as a functional conducting layer, and we believe that the hybrid CsPbBr3/ZnO phototransistor would promote the development of low-cost and high-performance photodetectors.
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高影响因子
APPLIED SURFACE SCIENCE
·
2013
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IF 2.112
Weibing Li,Fangxia Hua,Jiguang Yue,Jiwei Li
Metal-semiconductor compounds, such as Ag@AgX (X = Cl, Br, I), enable visible light absorption and separation of photogenerated electron–hole through surface plasmon resonance (SPR) effect. However, the electron–hole generated and separated by light are vulnerable in Ag@AgX phase because of the occurrence of secondary recombined. In order to more effectively utilize the SPR photocatalytic effect, a heterojunction interface electric field was implemented effectively by introducing some cost-effective semiconductor materials with wide band gap to Ag@AgX compound, thereby preventing photogenerated electrons from secondarily compounding with the holes. In this article, by mixing 500 nm diameter ZnO and Ag@AgX compounds with mole ratio 1:1, studies show that 15 min illumination under visible light can complete degradation of rhodamine B (RhB), and indicate a high stability of photocatalytic degradation. Through Mott–Schottky plots and photoinduced I – t curve, the results show that through the ZnO/Ag@AgCl composition, heterojunction interface electric field can be formed effectively, thus increasing the separation efficiency and transfer speed of photogenerated electrons and holes, and improving the photocatalytic performance. Meanwhile, Ag@AgCl can implement the photosensitization of ZnO with high efficiency through SPR effect, which will enlarge the response range of photocatalyst to the visible area.
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Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 10
·3491-3497
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IF 7.059
Wen Li,Da Xiong,Meilin Xie,Chao Luo,Xiankan Zeng,Yue Gao,Bolin Guo,Cheng Yan,Fengjun Chun,Zhihao Zhu,Xiaoqiang Fan,Weili Deng,Weiqing Yang
Nontoxic self-powered ZnO-based photodetectors are highly desired to meet the great demand for sensing, communication, and imaging applications, while directionally manipulating the confined photocarrier transport is critical to the enhancement in the photodetection performance. Herein, we demonstrated a highly c-axis-oriented Cu2ZnSnS4/ZnO (CZTS/ZnO) photodetector with coaxially enhanced photocarrier transport. This CZTS/ZnO photodetector delivers remarkable 31 times higher photocurrent mainly ascribed to the coaxially enhanced photocarrier transport in the vertically directed ZnO arrays through the nanoconfinement effect along with the substantially enhanced incident photon absorption of length-optimized ZnO nanorods (NRs). Furthermore, this photodetector delivers a high responsivity of 1.1 μA W−1, fast rise time of 600 ms, and decay time of 600 ms as well as good stability with no distinct photocurrent decay after 2500 cycles. This study will open up a coaxially enhanced photocarrier transport way to substantially improve the photodetection performance and may promote the development of next-generation optoelectronic devices.
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高影响因子
RSC Advances
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2017
·Vol. 7
·期 79
·49883-49889
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IF 3.108
Li-Jun Cui,Zhen-Hua Ge,Peng Qin,Jing Feng
Thermoelectric (TE) materials have a promising application as they can interconvert thermal energy to electrical energy directly. Oxide TE materials have attracted more attention for this application due to their high temperature stability. In this work, In2O3(ZnO)5 intrinsic superlattice ceramics with a layered structure were synthesized by reaction sintering a mixed powder of In2O3 and ZnO at 1200 °C for different holding times (t = 6, 8, 10, 12 and 15 h) in air. Their thermoelectric properties including the electrical conductivity, Seebeck coefficient and thermal conductivity, were measured from 323 to 973 K. The thermoelectric properties depended on the holding time. The highest ZT value of 0.19 at 973 K was obtained for the sample with a 12 h holding time.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuting Wei,Dan Yang,Renquan Guan,Peng Xu,Yuxin Wang,Yingmin Teng,Aicen Li,Junkai Zhang,Huaqiao Tan,Lili Wang,Zheng Lou,Wenjuan Zhang,Zhao Zhao
Hydrogen chloride (HCl) gas is widely generated in industrial processes and poses significant risks to human health and ecosystems. Therefore, highly efficient and sensitive sensors are essential for its detection. Among existing HCl gas sensors, chemiresistive sensors based on metal oxide semiconductors (MOSs) have gained considerable interest owing to their structural simplicity, low cost, and ease of miniaturization. However, these sensors often suffer from limitations such as slow response, low selectivity, and high operating temperatures. In this study, we successfully synthesized gas-sensing materials enriched with crystal defects and bulk strain through high-pressure torsion (HPT) technology. These modifications provide additional active sites for gas adsorption and reaction, and induce crystal field distortion that tunes the electronic structure, ultimately enhancing the HCl sensing performance. The optimal sample, ZnO-300R 3/2 , exhibited a response value of 213.79 % toward 100 ppm HCl gas, which is 14.6 times higher than that of the pristine ZnO. Combining spectroscopic analysis with density functional theory (DFT) calculations, we clarified the synergistic mechanism between electronic band structure modulation and surface lattice oxygen activation. This work provides valuable insights for designing novel room-temperature gas sensors and promotes a deeper understanding of surface lattice oxygen-mediated sensing mechanisms.
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高影响因子
Journal of Advanced Research
·
2025
·
IF 13
Mengjiao Wu,Chengpu Lv,Yuling Xiong,Wenglong Li,Yuangui Lin,Jing Li,Fei Yu,Huan Yuan,Biao You,Qiuping Zhang,Ming Xu
Introduction Heterostructured photocatalysts have shown an enormous potential in photocatalytic degradation of organic pollutants in wastewater. However, the efficacy of such heterojunction on the photocatalytic degradation behaviors has not yet been fully revealed. Objectives This work aims to demonstrate a specific photocatalytic degradation behavior of ZnO-based heterostructured nanocomposites toward methyl orange (MO) and methylene blue (MB) dyes based on a systematically comparative investigation for their physical and chemical properties. Methods A series of low-cost and efficient ZnO-based heterostructured nanocomposite photocatalysts including ZnO/CuO, ZnO/TiO 2 and ZnO/SnO 2 with 3 and 10 mol% of CuO/TiO 2 /SnO 2 were synthesized by a simple strategy to combine the modified polymer-network gel and traditional sol–gel methods. The physical and chemical properties were analyzed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), ultraviolet–visible (UV–Vis) absorption spectra, photoluminescence (PL), surface photovoltage (SPV), electrochemical impedance spectroscopy (EIS) and zeta potential. Results Owing to the fast interfacial charge transfer at the heterojunction, all the three ZnO-based nanocomposite catalysts exhibited higher efficient separation of photogenerated electrons and holes, delivering an enhanced photocatalytic activity for the degradation of organic dyes compared with pure ZnO. Three photocatalysts of ZnO/3 %-CuO, ZnO/3 %-TiO 2 and ZnO/10 %-SnO 2 (marking as ZC3, ZT3 and ZS10, respectively) were capable of achieving the complete degradation of 4 mg/L concentration of MB dye within 50 min, and the first two could degrade MO within 80 min. However, the degradation rate of MO by ZS10 became significantly slower. For MO and MB degradation, the active species of photogenerated holes ( h h ν + ) and superoxide radicals ( · O 2 - ) play the predominant roles, respectively, followed by hydroxyl radicals ( · OH ). The differences in heterojunction configuration and dominant active species result in a specific photocatalytic degradation behavior of ZnO-based composite nanostructures. Conclusion The generation of the active species are influenced by the heterojunction configurations, of which the essence is that the different band alignments can results in the differences of interfacial charge transfer behaviors, and thus selective generation of the active species such as h h ν + , · O 2 - and · OH . Importantly, this work offers a fundamental understanding for specific photocatalytic degradation of the different heterojunction nanostructures towards the different organic dyes.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Ting Xu,Houqi Zhou,Keying Tang,Yilong Fan,Yi Han,Zhifan Zhao,Chunyu Chen,Dianchun Ju
MgAl-LDH was widely recognized as an excellent support material for photocatalysts, yet its intrinsic hydrophilicity remains limited. In this study, the hydrophilicity of LDHs was effectively enhanced by transforming their two-dimensional plate-like structure into a three-dimensional flower-like morphology, which was subsequently pyrolyzed to obtain LDOs. ZnO microspheres were then deposited onto the LDOs through a low-co-solvent method, yielding a three-dimensional MgAl-LDO@ZnO composite catalyst with enhanced degradation activity. This composite provides a novel material option for adsorption-photocatalytic synergistic degradation of organic pollutants. This compositional combination not only enhanced hydrophilicity but also improved visible-light absorption and facilitates charge separation, thereby substantially enhancing catalytic performance compared to individual materials. Experimental results demonstrated that, compared to MgAl-LDH adsorption alone, the three-dimensional MgAl-LDO@ZnO exhibited approximately 2.5-fold improvement, achieving a degradation rate of 97.8% for basic fuchsin within 50 min, and retaining more than 90% adsorption-photocatalytic efficiency after five cycles. Infrared spectroscopy monitoring revealed intensified and broadened -OH stretching vibrations during degradation, while the characteristic peak of basic fuchsin disappeared, further confirming the degradation pathway. Active species trapping experiments identified ·OH and ·O 2 − as the dominant reactive species responsible for driving degradation. DFT calculations indicated that C1–9, N1, N2 and N3 serve as the primary active sites for radical attack. These findings confirmed the outstanding performance of MgAl-LDO@ZnO, demonstrated its practical applicability, and provided a promising strategy for constructing highly efficient and stable adsorption-photocatalytic degradation systems.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xi Zhu,Zhikun Li,Bolong Liang,Shijie Xing,Hongbin He,Xiliang Li,Shu-Xuan Liang
The continuous contamination of ciprofloxacin (CIP) pharmaceutical residues poses a potential risk to the ecological environment and human health. Using semiconductor materials with optimized heterojunctions for photodegradation is an effective way for the CIP removal. In this study, Fe-ZnO/CdS Z-type heterojunction was synthesized, and used for the photodegradation of organic pollutants. The Fe-doping brought abundant surface oxygen vacancies to ZnO, which could effectively promote interfacial electron transfer. In addition, the valence transition of Fe (II)/Fe (III) could effectively participate in the redox cycle and improve the carrier transfer efficiency. The construction of Z-type heterojunction facilitated the separation of photogenerated carriers, and the photogenerated electrons in the conduction band of CdS reduced oxygen to produce superoxide radicals as the main active radicals. A series of photoelectric characterizations had proved that the introduction of CdS could effectively improve the visible light utilization rate and photogenerated carrier separation efficiency. The Fe-ZnO/CdS system achieved 90.0% degradation efficiency of CIP within 120 min under visible light. Impressively, Fe-ZnO/CdS heterojunction showed practical degradation capability in complex aqueous environments and excellent reusability. This study provided an effective strategy for the design of metal oxide-based photocatalysts and offered a new idea for the removal of drug residual contaminants.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Pengchao Ren,Xin Fu,Shihang Meng,Yehao Yu,Yujing Weng,Liang Si,Yulong Zhang,Yi-Fan Han
Ce-modified CuZn-based catalysts show promising performance in CO 2 hydrogenation to methanol. However, probing the nature of their active surface and elucidating the role of Ce in regulating reaction pathways at the molecular level remain challenging. In this study, a series of CuZnCe catalysts were prepared with varying CeO 2 contents. Kinetic tests reveal that CuZnCe catalysts exhibit significantly higher activity and methanol selectivity compared to the unmodified CuZn catalyst. In-situ AP-XPS analysis demonstrates that Ce species preferentially migrate toward the catalyst surface and exist predominantly in the form of Ce 3 + during CO 2 hydrogenation to methanol. In-situ DRIFTS confirms that the CuZn catalyst facilitates the direct hydrogenation of CO 2 to methanol via a formate intermediate. In contrast, the introduction of Ce shifts the reaction mechanism toward the reverse water-gas shift reaction followed by CO-hydrogenation (RWGS + CO-hydro), as Ce 3+ sites display a high propensity to stabilize carboxylate (CO 2 δ- ) intermediates derived from CO 2 . Meanwhile, the Cu-ZnO x interface remains essential for H 2 dissociation and supplying hydrogen species. The enhanced catalytic performance of the CuZnCe catalysts is primarily attributed to the synergistic effects between the Cu-ZnO x and Cu-CeO x interfaces. These findings highlight the pivotal role of metal-oxide interfaces in controlling reaction pathways and methanol selectivity during CO 2 hydrogenation to methanol, providing valuable insights for the rational design of high-performance catalysts.
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高影响因子
CELLULOSE
·
2026
·
IF 4.8
Mo Yuhan,Hong Guolong,Chen Linbi,Yu Fangbing,Fei Mingen,Lin Huiping,Chen Ying,Li Ran,Yang Wenbin
Bamboo scrimber, as a sustainable engineered composite material, faces challenges in interfacial adhesion and mildew resistance due to the hydrophobic surface of bamboo bark/inner skin and its nutrient-rich composition (e.g., starch and other saccharides). Atmospheric plasma, through high-energy particles, can activate the bamboo surface by grafting oxygen-containing functional groups and inducing micro-roughness. This study proposes a novel strategy combining atmospheric plasma treatment with in situ zinc oxide nanoparticle deposition to simultaneously enhance interfacial bonding and anti-mold performance. The plasma-driven pyrolysis of zinc acetate precursor generates zinc oxide nanoparticles in situ, imparting mildew resistance to the material. Concurrently, this modification promotes deep penetration and uniform spreading of phenolic resin, forming a continuous bonding layer and mechanically interlocked "glue nail" structure at the bamboo-resin interface. The optimized composite exhibited a 13.7% increase in modulus of rupture (MOR), a 24.9% increase in modulus of elasticity (MOE), and a 107% increase in surface free energy. The inhibition rates against Aspergillus niger and Penicillium purpurogenum exceeded 90%, while the inhibition rate against Trichoderma viride reached 75%. This green and efficient one-step approach fully utilizes bamboo bark, significantly improving interfacial strength and mildew resistance, offering new insights for the interface engineering of natural fiber composites.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Qi Zhou,Na Yang,Luhong Zhang,Longfei Zhang,Jingshuai Li,Xiaodong Yang,Feifei Peng,Yongli Sun
Application of the super-wettability material is one of the most ideal approaches to achieve oil/water separation. The construction of the super-wettability material surface is the key to significantly boost the separation efficiency. In this work, the ZnO@Cu 2 O honeycomb-likes hierarchical micro/nano-structure copper mesh (ZnO@Cu 2 O/CM) is facilely fabricated through the combination of oxidation and hydrothermal deposition. Accordingly, superhydrophilicity/underwater superoleophobicity can be achieved, which endows over 99% separation efficiency as well as considerable permeation flux (>38120 L∙m −2 ∙h −1 ) for ZnO@Cu 2 O/CM toward various oil/water mixtures. Besides, the combination of ZnO and Cu 2 O produces a p-n heterostructure to further reduce the recombination rate of electron and hole, resulting in the improved the photocatalytic activity. The removal efficiency for methylene blue (MB) of ZnO@Cu 2 O/CM could be improved to 98.1%, nearly 1.6 times than that of Cu 2 O/CM. Various stability tests demonstrate that the material exhibits good mechanical stability , anti-corrosive property and thermal durability under harsh environments. Furthermore, cyclic experiments reveal that ZnO@Cu 2 O/CM exhibits fascinating reusability . In conclusion, the as-synthesized dual-functional mesh performs favorable photocatalytic activity and super-wettability, which can realize wastewater remediation at low cost and energy consumption.
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